Correction method, substrate processing apparatus, and substrate processing system
Abstract
Problem to be solved.To provide a correction method capable of reducing a burden on an operator. A correction method includes an acquisition step, a generation step, and a correction step. In the acquisition step, at least one execution condition of the execution conditions at the time of etching execution and at least one feature amount indicating the etching execution result are acquired. In the generation step, correction data for correcting at least one of the setting conditions of the substrate processing apparatus 100 is generated based on at least one execution condition and at least one feature amount. In the correction step, the substrate processing apparatus 100 corrects at least one setting condition based on the correction data. [Selection diagram] Fig. 13

Term
11.8 yearsto projected expiry
Projected expiry 27 June 2038, counted from filing; an application has no term until it is granted.
- Priority and filed
- Published
- Today
- Projected expiry
8 claims: 4 independent, 4 dependent
- 1基板をエッチングする基板処理装置の設定条件を補正する補正方法であって、 前記エッチング実行時の実行条件のうちの少なくとも1つの実行条件と、前記エッチングの実行結果を示す少なくとも1つの特徴量とを取得する取得ステップと、 前記少なくとも1つの実行条件と前記少なくとも1つの特徴量とに基づいて、前記設定条件のうちの少なくとも1つの設定条件を補正する補正データを生成する生成ステップと、 前記基板処理装置が前記補正データに基づいて前記少なくとも1つの設定条件を補正する補正ステップと を含む補正方法。
- 2前記取得ステップにおいて、機械学習によって生成された学習済みモデルに、前記少なくとも1つの実行条件と前記少なくとも1つの特徴量とが入力され、 前記生成ステップにおいて、前記学習済みモデルから前記補正データが出力される、請求項1に記載の補正方法。
- 3教師情報を機械学習させて前記学習済みモデルを生成する学習ステップを更に含み、 前記教師情報は、前記少なくとも1つの特徴量が最適な値を示す場合に得た情報であり、前記少なくとも1つの特徴量と、前記少なくとも1つの実行条件と、前記少なくとも1つの設定条件とを含む、請求項2に記載の補正方法。
- 4前記少なくとも1つの特徴量は、エッチング量と、エッチング量の均一性とのうちの少なくとも一方を含む、請求項1から請求項3のいずれか1項に記載の補正方法。
- 5前記基板処理装置は、 前記基板を収容する処理室と、 前記基板をエッチングする処理液を前記基板に向けて吐出する第1ノズルと、 前記第1ノズルに前記処理液を供給する供給流路と、 前記基板から飛散した前記処理液を受ける液受け部と、 前記基板に向けてガスを噴出する第2ノズルと、 前記処理室内へ空気を送るファンフィルタユニットと、 前記処理室から気体を排気する排気ファンと を備え、 前記エッチング実行時の実行条件は、 前記第1ノズルの先端における前記処理液の温度と、 前記第2ノズルの先端における前記ガスの温度と、 前記第1ノズルから前記処理液が吐出する流量と、 前記第2ノズルから前記ガスが噴出する流量と、 前記第1ノズルから前記処理液が吐出を開始するタイミングと、 前記第2ノズルから前記ガスが噴出を開始するタイミングと、 前記第1ノズルからの前記処理液の吐出が停止するタイミングと、 前記第2ノズルからの前記ガスの噴出が停止するタイミングと、 前記第1ノズルから前記処理液が吐出する流量の変更タイミングと、 前記第2ノズルから前記ガスが噴出する流量の変更タイミングと、 前記第1ノズルから前記処理液が吐出する流量の立ち上がり特性と、 前記第2ノズルから前記ガスが噴出する流量の立ち上がり特性と、 前記第1ノズルから前記処理液が吐出する流量の立ち下がり特性と、 前記第2ノズルから前記ガスが噴出する流量の立ち下がり特性と、 前記第1ノズルの先端から前記処理液がボタ落ちしているか否かを示す情報と、 前記供給流路を流れる前記処理液の濃度と、 前記処理液の吐出が停止した後に、前記第1ノズルから前記供給流路の上流側に向けて前記処理液が吸い込まれる速度と、 吸い込まれた前記処理液が停止する位置と、 前記基板を覆う前記処理液の膜厚分布と、 前記第1ノズルの位置と、 前記第1ノズルの移動速度と、 前記第1ノズルの加速度と、 前記第1ノズルの位置の変更タイミングと、 前記第1ノズルの移動速度の変更タイミングと、 前記液受け部への前記処理液の付着の有無を示す情報と、 前記液受け部に付着している前記処理液の量と、 前記基板の回転速度と、 前記基板の加速度と、 前記基板の回転速度の変更タイミングと、 前記基板の表面温度と、 前記基板の偏心量と、 前記基板の面振れ量と、 前記液受け部の位置と、 前記液受け部の移動速度と、 前記液受け部の加速度と、 前記液受け部の位置の変更タイミングと、 前記液受け部の移動速度の変更タイミングと、 前記ファンフィルタユニットが前記処理室内に送る空気の風速と、 前記ファンフィルタユニットが前記処理室内に送る空気の風量と、 前記処理室から排気される気体の風速と、 前記処理室から排気される気体の風量と のうちの少なくとも1つを含む、請求項1から請求項4のいずれか1項に記載の補正方法。
- 6前記基板処理装置は、 前記基板を収容する処理室と、 前記基板をエッチングする処理液を前記基板に向けて吐出する第1ノズルと、 前記第1ノズルに前記処理液を供給する第1供給流路と、 前記第1供給流路に接続し、前記処理液が循環する循環流路と、 前記循環流路に前記処理液を供給する第2供給流路と、 前記基板を加熱する加熱部と、 前記基板から飛散した前記処理液を受け止める液受け部と、 前記基板に向けてガスを噴出する第2ノズルと、 前記第2ノズルに前記ガスを供給する第3供給流路と、 前記処理室内へ空気を送るファンフィルタユニットと、 前記処理室から気体を排気する排気ファンと、 前記処理室から排気される気体が流れる排気ダクトと、 前記排気ダクトに設置されたバルブと を備え、 前記基板処理装置の設定条件は、 前記循環流路における前記処理液の温度と、 前記第1供給流路における前記処理液の温度と、 前記第3供給流路における前記ガスの温度と、 前記循環流路における前記処理液の濃度と、 前記第1供給流路における前記処理液の濃度と、 前記第2供給流路の圧力と、 前記第3供給流路の圧力と、 前記循環流路の圧力と、 前記循環流路を流れる前記処理液の流量と、 前記第1ノズルから前記処理液が吐出する流量と、 前記第2ノズルから前記ガスが噴出する流量と、 前記第1ノズルからの前記処理液の吐出を開始させる信号の発生タイミングと、 前記第2ノズルからの前記ガスの噴出を開始させる信号の発生タイミングと、 前記第1ノズルからの前記処理液の吐出を停止させる信号の発生タイミングと、 前記第2ノズルからの前記ガスの噴出を停止させる信号の発生タイミングと、 前記第1ノズルから前記処理液が吐出する流量を変更する信号の発生タイミングと、 前記第2ノズルから前記ガスが噴出する流量を変更する信号の発生タイミングと、 前記第1ノズルから前記処理液が吐出する流量の立ち上がり特性と、 前記第2ノズルから前記ガスが噴出する流量の立ち上がり特性と、 前記第1ノズルから前記処理液が吐出する流量の立ち下がり特性と、 前記第2ノズルから前記ガスが噴出する流量の立ち下がり特性と、 前記処理液の吐出が停止した後に、前記第1ノズルから前記第1供給流路の上流側に向けて前記処理液が吸い込まれる速度と、 吸い込まれた前記処理液が停止する位置と、 前記基板の回転速度と、 前記基板の加速度と、 前記基板の回転速度の変更タイミングと、 前記第1ノズルの位置と、 前記第1ノズルの移動速度と、 前記第1ノズルの加速度と、 前記第1ノズルの位置の変更タイミングと、 前記第1ノズルの移動速度の変更タイミングと、 前記基板を加熱する温度と、 前記液受け部の位置と、 前記液受け部の移動速度と、 前記液受け部の加速度と、 前記液受け部の位置の変更タイミングと、 前記液受け部の移動速度の変更タイミングと、 前記ファンフィルタユニットの差圧と、 前記バルブの差圧と、 前記処理室から排気される気体の風速と、 前記処理室から排気される気体の風量と、 前記処理室内の光量と のうちの少なくとも1つを含む、請求項1から請求項5のいずれか1項に記載の補正方法。
- 7基板をエッチングする基板処理装置であって、 前記エッチング実行時の実行条件のうちの少なくとも1つの実行条件と、前記エッチングの実行結果を示す少なくとも1つの特徴量とに基づいて、前記基板処理装置の設定条件のうちの少なくとも1つの設定条件を補正する補正データを生成する制御部を備え、 前記制御部は、前記補正データに基づいて前記少なくとも1つの設定条件を補正する、基板処理装置。
- 8基板をエッチングする基板処理装置と、前記基板処理装置の設定条件を補正する補正データを出力する補正データ生成装置とを備える基板処理システムであって、 前記補正データ生成装置は、前記エッチング実行時の実行条件のうちの少なくとも1つの実行条件と、前記エッチングの実行結果を示す少なくとも1つの特徴量とに基づいて、前記基板処理装置の設定条件のうちの少なくとも1つの設定条件を補正する補正データを生成する制御部を備え、 前記基板処理装置は、前記補正データに基づいて前記少なくとも1つの設定条件を補正する、基板処理システム。
Independent claims8
191 paragraphs, as filed
The present invention relates to a correction method, a substrate processing apparatus, and a substrate processing system.
A substrate processing device for etching a substrate is known. The state of the substrate processing apparatus fluctuates based on the aged deterioration of the components constituting the substrate processing apparatus, the variation in the positions of the components due to the replacement of the components constituting the substrate processing apparatus, and the like. Therefore, it is necessary to appropriately correct various setting conditions of the substrate processing apparatus so that optimum etching is executed. Specifically, it is necessary to measure the film thickness of the etched substrate and correct the setting condition when the etching amount does not show the desired value. The film thickness of the substrate is measured using a film thickness measuring device (see, for example, Patent Document 1).
<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 2013-134065</text></patcit></p>
<p> However, the correction of the setting conditions is manually performed by the operator over a long period of time, which is a burden on the operator.</p><p> The present invention has been made in view of the above problems, and an object of the present invention is to provide a correction method, a substrate processing apparatus, and a substrate processing system capable of reducing the burden on an operator.</p>
<p> The correction method of the present invention is a correction method for correcting the setting conditions of the substrate processing apparatus for etching a substrate, and shows at least one execution condition of the execution conditions at the time of executing the etching and the execution result of the etching. Based on the acquisition step of acquiring at least one feature amount, the at least one execution condition, and the at least one feature amount, correction data for correcting at least one of the setting conditions is generated. The generation step includes a correction step in which the substrate processing apparatus corrects at least one of the setting conditions based on the correction data.</p><p> In one embodiment, in the acquisition step, the at least one execution condition and the at least one feature amount are input to the trained model generated by machine learning.</p><p> In one embodiment, the correction data is output from the trained model in the generation step.</p><p> In certain embodiments, the correction method further includes a learning step of machine learning the teacher information to generate the trained model.</p><p> In certain embodiments, the teacher information is information obtained when the at least one feature quantity exhibits an optimum value, the at least one feature quantity, the at least one execution condition, and the at least one feature quantity. Including setting conditions.</p><p> In certain embodiments, the at least one feature quantity comprises at least one of an etching amount and an etching amount uniformity.</p><p> In certain embodiments, the substrate processing apparatus includes a processing chamber, a first nozzle, a supply flow path, a liquid receiving portion, a second nozzle, a fan filter unit, and an exhaust fan. The processing chamber houses the substrate. The first nozzle discharges a processing liquid for etching the substrate toward the substrate. The supply flow path supplies the treatment liquid to the first nozzle. The liquid receiving portion receives the processing liquid scattered from the substrate. The second nozzle ejects gas toward the substrate. The fan filter unit sends air into the processing chamber. The exhaust fan exhausts gas from the processing chamber.</p><p> In a certain embodiment, the execution conditions at the time of executing the etching are the temperature of the treatment liquid at the tip of the first nozzle, the temperature of the gas at the tip of the second nozzle, and the treatment liquid from the first nozzle. The flow rate to be discharged, the flow rate at which the gas is ejected from the second nozzle, the timing at which the treatment liquid starts to be discharged from the first nozzle, the timing at which the gas is ejected from the second nozzle, and the above. The timing at which the discharge of the treatment liquid from the first nozzle is stopped, the timing at which the ejection of the gas from the second nozzle is stopped, the timing at which the flow rate of the treatment liquid is discharged from the first nozzle is changed, and the above. The change timing of the flow rate at which the gas is ejected from the second nozzle, the rising characteristic of the flow rate at which the processing liquid is discharged from the first nozzle, the rising characteristic of the flow rate at which the gas is ejected from the second nozzle, and the first The falling characteristic of the flow rate of the treatment liquid discharged from one nozzle, the falling characteristic of the flow rate of the gas ejected from the second nozzle, and whether or not the treatment liquid has dropped from the tip of the first nozzle. Information indicating the above, the concentration of the treatment liquid flowing through the supply flow path, and the speed at which the treatment liquid is sucked from the first nozzle toward the upstream side of the supply flow path after the discharge of the treatment liquid is stopped. The position where the sucked treatment liquid stops, the film thickness distribution of the treatment liquid covering the substrate, the position of the first nozzle, the moving speed of the first nozzle, and the acceleration of the first nozzle. The timing of changing the position of the first nozzle, the timing of changing the moving speed of the first nozzle, the information indicating whether or not the treatment liquid is attached to the liquid receiving portion, and the information indicating whether or not the processing liquid is attached to the liquid receiving portion are attached to the liquid receiving portion. The amount of the processing liquid, the rotational speed of the substrate, the acceleration of the substrate, the timing of changing the rotational speed of the substrate, the surface temperature of the substrate, the eccentricity of the substrate, and the surface of the substrate. The amount of runout, the position of the liquid receiving portion, the moving speed of the liquid receiving portion, the acceleration of the liquid receiving portion, the change timing of the position of the liquid receiving portion, and the change timing of the moving speed of the liquid receiving portion. And the fan filter unitOf the air velocity of the air sent to the processing chamber, the air volume of the air sent by the fan filter unit to the processing chamber, the air velocity of the gas exhausted from the processing chamber, and the air volume of the gas exhausted from the processing chamber. Includes at least one.</p><p> In one embodiment, the substrate processing apparatus includes a processing chamber, a first nozzle, a first supply channel, a circulation channel, a second supply channel, a heating unit, a liquid receiving unit, and a second. It includes a nozzle, a third supply flow path, a fan filter unit, an exhaust fan, an exhaust duct, and a valve. The processing chamber houses the substrate. The first nozzle discharges a processing liquid for etching the substrate toward the substrate. The first supply flow path supplies the treatment liquid to the first nozzle. The circulation flow path is connected to the first supply flow path, and the treatment liquid circulates. The second supply flow path supplies the treatment liquid to the circulation flow path. The heating unit heats the substrate. The liquid receiving portion receives the processing liquid scattered from the substrate. The second nozzle ejects gas toward the substrate. The third supply flow path supplies the gas to the second nozzle. The fan filter unit sends air into the processing chamber. The exhaust fan exhausts gas from the processing chamber. The gas exhausted from the processing chamber flows through the exhaust duct. The valve is installed in the exhaust duct.</p><p> In one embodiment, the setting conditions of the substrate processing apparatus are the temperature of the processing liquid in the circulation flow path, the temperature of the treatment liquid in the first supply flow path, and the gas in the third supply flow path. The temperature, the concentration of the treatment liquid in the circulation flow path, the concentration of the treatment liquid in the first supply flow path, the pressure of the second supply flow path, the pressure of the third supply flow path, and the above. The pressure of the circulation flow path, the flow rate of the processing liquid flowing through the circulation flow path, the flow rate of the treatment liquid discharged from the first nozzle, the flow rate of the gas ejected from the second nozzle, and the first The generation timing of the signal for starting the discharge of the treatment liquid from the nozzle, the generation timing of the signal for starting the ejection of the gas from the second nozzle, and the discharge of the treatment liquid from the first nozzle are stopped. The signal generation timing, the signal generation timing for stopping the gas ejection from the second nozzle, the signal generation timing for changing the flow rate of the processing liquid discharged from the first nozzle, and the second nozzle. The generation timing of a signal for changing the flow rate at which the gas is ejected from the first nozzle, the rising characteristic of the flow rate of the processing liquid discharged from the first nozzle, the rising characteristic of the flow rate of the gas ejected from the second nozzle, and the above. The falling characteristic of the flow rate at which the treatment liquid is discharged from the first nozzle, the falling characteristic of the flow rate at which the gas is ejected from the second nozzle, and the first from the first nozzle after the discharge of the treatment liquid is stopped. 1 The speed at which the treatment liquid is sucked toward the upstream side of the supply flow path, the position where the sucked treatment liquid stops, the rotation speed of the substrate, the acceleration of the substrate, and the rotation speed of the substrate. The change timing, the position of the first nozzle, the moving speed of the first nozzle, the acceleration of the first nozzle, the changing timing of the position of the first nozzle, and the changing timing of the moving speed of the first nozzle. The temperature at which the substrate is heated, the position of the liquid receiving portion, the moving speed of the liquid receiving portion, the acceleration of the liquid receiving portion, the change timing of the position of the liquid receiving portion, and the liquid receiving portion. The timing of changing the movement speed ofAt least of the differential pressure of the filter unit, the differential pressure of the bulb, the wind speed of the gas exhausted from the processing chamber, the air volume of the gas exhausted from the processing chamber, and the light amount of the processing chamber. Including one.</p><p> The substrate processing apparatus of the present invention etches a substrate. The substrate processing device includes a control unit. The control unit has at least one of the setting conditions of the substrate processing apparatus based on at least one execution condition of the execution conditions at the time of executing the etching and at least one feature amount indicating the execution result of the etching. Generate correction data that corrects one setting condition. The control unit corrects at least one of the setting conditions based on the correction data.</p><p> The substrate processing system of the present embodiment includes a substrate processing apparatus and a correction data generation apparatus. The substrate processing apparatus etches the substrate. The correction data generation device outputs correction data for correcting the setting conditions of the substrate processing device. The correction data generation device includes a control unit. The control unit has at least one of the setting conditions of the substrate processing apparatus based on at least one execution condition of the execution conditions at the time of executing the etching and at least one feature amount indicating the execution result of the etching. Generate correction data that corrects one setting condition. The substrate processing apparatus corrects the at least one setting condition based on the correction data.</p>
<p> According to the present invention, the burden on the operator can be reduced.</p>
<figref num="1">It is a schematic diagram of the substrate processing apparatus in Embodiment 1 of this invention.</figref><figref num="2">It is a flowchart which shows the substrate processing method in Embodiment 1 of this invention.</figref><figref num="3">It is a block diagram of the substrate processing apparatus in Embodiment 1 of this invention.</figref><figref num="4">It is a figure which shows an example of the change of the position of the processing liquid nozzle, and the change of the moving speed at the time of an etching process.</figref><figref num="5">It is a block diagram of the substrate processing apparatus in Embodiment 1 of this invention.</figref><figref num="6">It is a schematic diagram of the processing liquid supply part in Embodiment 1 of this invention.</figref><figref num="7">It is a schematic diagram of the gas supply part in Embodiment 1 of this invention.</figref><figref num="8">It is a schematic diagram which shows the processing liquid circulation part, the 1st treatment liquid component supply part, the 2nd treatment liquid component supply part, and the treatment liquid recovery part in Embodiment 1 of this invention.</figref><figref num="9">It is a block diagram of the substrate processing apparatus in Embodiment 1 of this invention.</figref><figref num="10">It is a schematic diagram of the substrate processing system in Embodiment 1 of this invention.</figref><figref num="11">It is a figure which shows an example of the etching amount for every radial position of a processed substrate.</figref><figref num="12">It is a block diagram of the substrate processing apparatus in Embodiment 1 of this invention.</figref><figref num="13">It is a flowchart which shows the correction method in Embodiment 1 of this invention.</figref><figref num="14">It is a schematic diagram of the trained model in Embodiment 1 of this invention.</figref><figref num="15">It is a flowchart which shows the learning method in Embodiment 1 of this invention.</figref><figref num="16">It is a schematic diagram of the substrate processing system in Embodiment 2 of this invention.</figref>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments. In addition, the description may be omitted as appropriate for the parts where the explanations are duplicated. Further, in the drawings, the same or corresponding parts are designated by the same reference numerals and the description is not repeated.
[Embodiment 1]
The substrate processing apparatus 100 of the present embodiment will be described with reference to FIG. FIG. 1 is a schematic view of the substrate processing apparatus 100 of the present embodiment. The substrate processing apparatus 100 supplies the processing liquid L to the substrate W and etches the substrate W with the processing liquid L. The substrate processing apparatus 100 of the present embodiment is a single-wafer type apparatus that etches the substrate W one by one. Further, in the present embodiment, the substrate W is a semiconductor wafer. The substrate W has a substantially disk shape.
As shown in FIG. 1, the substrate processing device 100 includes a box-shaped partition wall 21, a fan filter unit (FFU) 22, and an exhaust unit 23. The partition wall 21 partitions a processing chamber 2 (chamber) for accommodating the substrate W.
The FFU22 sends clean air from the upper part of the partition wall 21 to the processing chamber 2. Specifically, the FFU22 has an air supply fan and a filter. The FFU22 sends the air filtered by the filter to the processing chamber 2.
The exhaust unit 23 is arranged in the lower part of the processing chamber 2. The exhaust unit 23 exhausts the gas in the processing chamber 2. The FFU 22 and the exhaust unit 23 form a downflow that flows from above to below in the processing chamber 2. Etching of the substrate W is performed in a state where a downflow is formed in the processing chamber 2.
The exhaust unit 23 includes an exhaust fan 231, an exhaust duct 232, and a valve 233. The exhaust fan 231 is arranged in the exhaust duct 232. The exhaust fan 231 exhausts gas from the processing chamber 2. Specifically, when the exhaust fan 231 is driven, the gas in the processing chamber 2 flows into the exhaust duct 232. As a result, the gas exhausted from the processing chamber 2 flows through the exhaust duct 232.
The exhaust duct 232 guides the gas to the exhaust equipment provided in the factory where the substrate processing device 100 is installed. Therefore, when the exhaust fan 231 is driven, the gas in the processing chamber 2 is guided to the exhaust equipment via the exhaust duct 232.
The valve 233 is installed in the exhaust duct 232. Specifically, the valve 233 is arranged downstream of the exhaust fan 231 with respect to the direction in which the gas flows through the exhaust duct 232. The valve 233 controls the pressure (exhaust pressure) of the gas flow path (exhaust flow path) formed by the exhaust duct 232. The valve 233 is, for example, an auto valve.
As shown in FIG. 1, the substrate processing apparatus 100 further includes a spin chuck 3. The spin chuck 3 holds the substrate W horizontally. Further, the spin chuck 3 rotates the substrate W around the rotation axis AX1 extending in the vertical direction while holding the substrate W. Specifically, the spin chuck 3 includes a spin base 31, a plurality of chuck pins 32, a rotating shaft 33, a spin motor 34, and a motor encoder 35.
The spin base 31 of this embodiment has a disk shape. The spin base 31 is held in a horizontal position. Each of the plurality of chuck pins 32 holds the substrate W in a horizontal position above the spin base 31. The rotation shaft 33 extends downward from the central portion of the spin base 31. The spin motor 34 rotates the substrate W and the spin base 31 around the rotation axis AX1 by rotating the rotation shaft 33 in the rotation direction Dr. The motor encoder 35 generates a signal indicating the rotation speed of the spin motor 34. In other words, the motor encoder 35 generates a signal indicating the rotation speed of the substrate W.
As shown in FIG. 1, the substrate processing apparatus 100 further includes a processing liquid nozzle 41, a processing liquid supply pipe 42, a nozzle arm 43, and a nozzle moving portion 44.
The processing liquid nozzle 41 discharges the processing liquid L toward the substrate W held by the spin chuck 3. By supplying the processing liquid L to the substrate W, the substrate W is etched. The treatment liquid L is, for example, an aqueous solution containing phosphoric acid (etching component) as a main component, an aqueous solution containing hydrofluoric acid (etching component) as a main component, an aqueous solution containing nitric acid (etching component) as a main component, and hydrofluoric acid (etching component). An aqueous solution of nitric acid (etching component), an aqueous solution containing ammonium hydroxide (etching component) as the main component, and an aqueous solution of ammonium hydroxide (etching component) and hydrogen peroxide solution (etching component). It is either.
The treatment liquid supply pipe 42 supplies the treatment liquid L to the treatment liquid nozzle 41. The treatment liquid supply pipe 42 forms a treatment liquid supply flow path through which the treatment liquid L flows toward the treatment liquid nozzle 41.
The nozzle arm 43 supports the processing liquid nozzle 41. Specifically, the treatment liquid nozzle 41 is attached to the tip end portion of the nozzle arm 43. The nozzle moving portion 44 rotates the nozzle arm 43 around the rotation axis AX2 extending in the vertical direction around the spin chuck 3. As a result, the processing liquid nozzle 41 rotates about the rotation axis AX2. The processing liquid nozzle 41 discharges the processing liquid L toward the substrate W while rotating around the rotation axis AX2. In other words, the treatment liquid nozzle 41 is a scan nozzle.
As shown in FIG. 1, the substrate processing apparatus 100 further includes a heating unit 5. The heating unit 5 heats the substrate W. Specifically, the heating unit 5 includes an infrared heater 51, a heater arm 52, and a heater moving unit 53.
The infrared heater 51 irradiates the substrate W with infrared rays. More specifically, the infrared heater 51 has an infrared lamp 51a. The infrared lamp 51a generates infrared rays.
The heater arm 52 supports the infrared heater 51. Specifically, the infrared heater 51 is attached to the tip of the heater arm 52. The heater moving portion 53 rotates the heater arm 52 around the rotation axis AX3 extending in the vertical direction around the spin chuck 3. As a result, the infrared heater 51 rotates about the rotation axis AX3. The infrared heater 51 heats the substrate W while rotating around the rotation axis AX3.
As shown in FIG. 1, the substrate processing apparatus 100 further includes a rinse liquid supply unit 6. The rinse liquid supply unit 6 supplies the rinse liquid to the substrate W. By supplying the rinse liquid to the substrate W, the substrate W is rinsed. The rinsing solution is, for example, pure water (Deionzied Water). The rinse solution is not limited to pure water, but may be carbonated water, electrolytic ionized water, hydrogen water, ozone water, IPA (isopropyl alcohol), or hydrochloric acid water having a diluted concentration (for example, about 10 to 100 ppm). You may.
Specifically, the rinse liquid supply unit 6 includes a rinse liquid nozzle 61, a rinse liquid supply pipe 62, and a rinse liquid valve 63. The rinse liquid nozzle 61 discharges the rinse liquid toward the substrate W held by the spin chuck 3. The rinse liquid supply pipe 62 supplies the rinse liquid to the rinse liquid nozzle 61. The rinse liquid nozzle 61 of the present embodiment is a fixed nozzle that discharges the rinse liquid in a state where the discharge port of the rinse liquid nozzle 61 is stationary. The rinse liquid nozzle 61 may be a scan nozzle.
The rinse liquid valve 63 switches between supplying and stopping the supply of the rinse liquid to the rinse liquid nozzle 61. Specifically, when the rinse liquid valve 63 is opened, the rinse liquid is discharged from the rinse liquid nozzle 61 toward the substrate W. On the other hand, when the rinse liquid valve 63 is closed, the discharge of the rinse liquid is stopped. The rinse liquid valve 63 is, for example, a motor valve.
As shown in FIG. 1, the substrate processing device 100 further includes a gas nozzle 71, a gas supply pipe 72, and a liquid receiving unit 8.
The gas nozzle 71 ejects the gas G toward the substrate W. Gus G is an inert gas containing an inert component such as nitrogen. Specifically, the gas nozzle 71 ejects the gas G toward the substrate W when the substrate W is dried.
The gas supply pipe 72 supplies the gas G to the gas nozzle 71. The gas supply pipe 72 forms a gas supply flow path through which the gas G flows toward the gas nozzle 71.
The liquid receiving portion 8 is arranged outside the substrate W held by the spin chuck 3. The liquid receiving portion 8 has a substantially tubular shape. The liquid receiving portion 8 can move in the vertical direction. The liquid receiving unit 8 receives the processing liquid L scattered from the substrate W. Specifically, when the processing liquid L is supplied to the substrate W while the spin chuck 3 is rotating the substrate W, the processing liquid L supplied to the substrate W is shaken off around the substrate W. As a result, the processing liquid L is scattered around the substrate W, and the processing liquid L scattered from the substrate W is received by the liquid receiving unit 8. The processing liquid L received by the liquid receiving unit 8 is sent to the processing liquid collecting unit 600 described with reference to FIG. The liquid receiving unit 8 also receives the rinse liquid scattered from the substrate W in the same manner as the treatment liquid L.
Here, the substrate processing method executed by the substrate processing apparatus 100 of the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 2 is a flowchart showing the substrate processing method of the present embodiment. As shown in FIG. 2, the substrate processing method of the present embodiment includes steps S1 to S5.
When the substrate processing apparatus 100 processes the substrate W, the substrate W is first carried into the processing chamber 2 (step S1). Specifically, the transfer robot carries the substrate W into the processing chamber 2. The carried-in substrate W is held by the spin chuck 3. When the substrate W is carried into the processing chamber 2, the liquid receiving portion 8 is located at the retracted position. When the liquid receiving portion 8 is located in the retracted position, the upper end portion 8a (FIG. 1) of the liquid receiving portion 8 is located below the spin base 31. When the spin chuck 3 holds the substrate W, the liquid receiving portion 8 moves upward to a liquid receiving position where the processing liquid L and the rinse liquid scattered from the substrate W can be received. When the liquid receiving portion 8 is located at the liquid receiving position, the upper end portion 8a of the liquid receiving portion 8 is located above the spin base 31.
After the spin chuck 3 holds the substrate W, the substrate W is etched with the processing liquid L (step S2). Specifically, the spin chuck 3 rotates the substrate W before supplying the processing liquid L to the substrate W. After the rotation speed of the substrate W reaches a predetermined rotation speed, the supply of the processing liquid L is started.
Specifically, the processing liquid nozzle 41 discharges the processing liquid L while rotating around the rotation axis AX2. The treatment liquid nozzle 41 discharges the treatment liquid L until at least the entire upper surface of the substrate W is covered with the treatment liquid L. In the present embodiment, after the discharge of the treatment liquid L is stopped, the treatment liquid L is sucked from the treatment liquid nozzle 41 toward the upstream side of the treatment liquid supply pipe 42 (sackback).
When the discharge of the treatment liquid L by the treatment liquid nozzle 41 is stopped, the heating unit 5 heats the substrate W and the treatment liquid L. Specifically, the infrared heater 51 heats the substrate W and the processing liquid L while rotating around the rotation axis AX3.
After heating the substrate W and the treatment liquid L, the rinse liquid is supplied to the substrate W (step S3). By supplying the rinse liquid to the substrate W, the treatment liquid L on the surface of the substrate W is removed. Specifically, the treatment liquid L is swept out of the substrate W by the rinsing liquid and discharged around the substrate W. As a result, the liquid film of the treatment liquid L on the substrate W is replaced with the liquid film of the rinse liquid covering the entire upper surface of the substrate W.
After replacing the treatment liquid L on the surface of the substrate W with a rinsing liquid, the substrate W is dried (step S4). Specifically, the rotation speed of the substrate W is increased more than the rotation speed during the etching process and the rinse process. As a result, a large centrifugal force is applied to the rinse liquid on the substrate W, and the rinse liquid adhering to the substrate W is shaken off around the substrate W. In this way, the rinse liquid is removed from the substrate W and the substrate W is dried. Further, when the substrate W is dried, the gas G is ejected from the gas nozzle 71 toward the substrate W. As a result, an air flow of the inert gas toward the surface of the substrate W is formed, and the drying of the substrate W is promoted. Further, by promoting the drying of the substrate W, it is possible to suppress the occurrence of watermarks. For example, the spin chuck 3 stops the rotation of the substrate W after a predetermined time has elapsed from the start of the high-speed rotation of the substrate W.
After stopping the rotation of the substrate W, the substrate W is carried out from the processing chamber 2 (step S5), and the process shown in FIG. 2 is completed. Specifically, after the rotation of the substrate W is stopped, the liquid receiving portion 8 moves from the liquid receiving position to the retracted position. In addition, the holding of the substrate W by the spin chuck 3 is released. When the liquid receiving unit 8 moves to the retracted position and the holding of the substrate W by the spin chuck 3 is released, the transfer robot carries out the substrate W from the processing chamber 2. As a result, the processing of one substrate W by the substrate processing apparatus 100 is completed.
Subsequently, the substrate processing apparatus 100 of the present embodiment will be described with reference to FIG. 1 again. As shown in FIG. 1, the substrate processing apparatus 100 further includes a thermography camera 101, a video camera 102, and a dimming lamp 103.
The thermography camera 101 detects the temperature distribution in the processing chamber 2. The temperature distribution in the processing chamber 2 is the temperature of the processing liquid L at the tip of the processing liquid nozzle 41, the temperature of the gas G at the tip of the gas nozzle 71, the temperature of the surface of the substrate W, the temperature of the partition wall 21, and the temperature of the liquid receiving portion 8. , The temperature of the nozzle arm 43, the temperature of the spin base 31, and the like.
The video camera 102 images the inside of the processing chamber 2. Specifically, the video camera 102 images the processing liquid nozzle 41, the processing liquid supply pipe 42, the nozzle arm 43, the chuck pin 32, the liquid receiving portion 8, the substrate W, and the like. The dimming lamp 103 generates light that illuminates the processing chamber 2.
Subsequently, the substrate processing apparatus 100 of the present embodiment will be described with reference to FIGS. 1 and 3. FIG. 3 is a block diagram of the substrate processing apparatus 100. As shown in FIG. 3, the substrate processing device 100 further includes a liquid receiving moving unit 81 and a control unit 10.
The control unit 10 includes a processor 11 and a storage unit 12. The processor 11 is, for example, a central processing unit (CPU). Alternatively, the processor 11 is a general-purpose arithmetic unit. The storage unit 12 stores data and computer programs. The storage unit 12 includes a main storage device and an auxiliary storage device. The main storage device is composed of, for example, a semiconductor memory. The auxiliary storage device is composed of, for example, a semiconductor memory and / or a hard disk drive. The storage unit 12 may include removable media.
The processor 11 executes a computer program stored in the storage unit 12, and executes an FFU 22, an exhaust unit 23, a spin chuck 3, a nozzle moving unit 44, a heating unit 5, a rinse liquid supply unit 6, and the like. It controls the liquid receiving moving unit 81, the dimming lamp 103, the thermography camera 101, and the video camera 102.
Specifically, the processor 11 controls the air supply fan included in the FFU 22. The processor 11 can control the air supply fan to adjust the differential pressure of the FFU22. The differential pressure of FFU22 is a setting condition of the substrate processing apparatus 100.
The processor 11 controls the exhaust fan 231 and the valve 233 included in the exhaust unit 23. The processor 11 can control the exhaust fan 231 to adjust the air velocity of the gas flowing through the exhaust duct 232 (exhaust air velocity) and the air volume of the gas flowing through the exhaust duct 232 (exhaust air volume). In addition, the processor 11 can control the valve 233 to adjust the exhaust pressure. The exhaust air speed, the exhaust air volume, and the exhaust pressure are the setting conditions of the substrate processing device 100.
The processor 11 controls the chuck pin 32 and the spin motor 34 included in the spin chuck 3. The processor 11 can control the spin motor 34 to adjust the rotation speed of the substrate W, the rotational acceleration of the substrate W, and the change timing of the rotational speed of the substrate W. The rotation speed of the substrate W and the like are setting conditions of the substrate processing apparatus 100.
The processor 11 receives a signal from the motor encoder 35 included in the spin chuck 3. As described with reference to FIG. 1, the motor encoder 35 outputs a signal indicating the rotation speed of the substrate W. The processor 11 detects the rotation speed of the substrate W, the rotational acceleration of the substrate W, and the change timing of the rotational acceleration of the substrate W based on the signal received from the motor encoder 35. The detected rotation speed of the substrate W and the like are execution conditions at the time of etching execution. The processor 11 stores the detected information indicating the rotation speed of the substrate W and the like in the storage unit 12.
The nozzle moving unit 44 includes a motor 441 and a motor encoder 442. Hereinafter, the motor 441 will be referred to as a "nozzle motor 441". When the nozzle motor 441 is driven, the processing liquid nozzle 41 rotates about the rotation axis A2. The motor encoder 442 generates a signal indicating the rotation speed and the rotation position of the nozzle motor 441. In other words, the motor encoder 442 generates a signal indicating the moving speed and the radial position of the processing liquid nozzle 41.
Processor 11 controls the nozzle motor 441. The processor 11 controls the nozzle motor 441 to determine the radial position of the processing liquid nozzle 41, the moving speed of the processing liquid nozzle 41, the acceleration of the processing liquid nozzle 41, the timing of changing the position of the processing liquid nozzle 41, and the processing liquid. The timing of changing the moving speed of the nozzle 41 can be adjusted. The radial position of the processing liquid nozzle 41 and the like are setting conditions of the substrate processing apparatus 100.
The processor 11 receives a signal from the motor encoder 442 indicating the rotation speed and the rotation position of the nozzle motor 441. Based on the signal received from the motor encoder 442, the processor 11 determines the radial position of the processing liquid nozzle 41, the moving speed of the processing liquid nozzle 41, the acceleration of the processing liquid nozzle 41, and the timing of changing the position of the processing liquid nozzle 41. And the change timing of the moving speed of the processing liquid nozzle 41 is detected. The detected position of the processing liquid nozzle 41 in the radial direction and the like are execution conditions at the time of etching execution. The processor 11 stores the detected information indicating the position of the processing liquid nozzle 41 in the radial direction in the storage unit 12.
The processor 11 controls the rinse liquid valve 63 included in the rinse liquid supply unit 6. Further, the processor 11 controls the infrared lamp 51a and the heater moving unit 53 included in the heating unit 5. The processor 11 can control the infrared lamp 51a to adjust the temperature at which the substrate W is heated (the substrate heating temperature). The substrate heating temperature is a setting condition of the substrate processing apparatus 100.
The liquid receiving moving unit 81 moves the liquid receiving unit 8 in the vertical direction. The liquid receiving moving unit 81 includes a motor 811 and a motor encoder 812. Hereinafter, the motor 811 will be referred to as a "liquid receiving motor 811". When the liquid receiving motor 811 is driven, the liquid receiving portion 8 moves in the vertical direction. The motor encoder 812 generates a signal indicating the rotation speed and rotation position of the liquid receiving motor 811. In other words, the motor encoder 812 generates a signal indicating the moving speed and the vertical position of the liquid receiving unit 8.
The processor 11 controls the liquid receiving motor 811. The processor 11 controls the liquid receiving motor 811 to determine the vertical position of the liquid receiving unit 8, the moving speed of the liquid receiving unit 8, the acceleration of the liquid receiving unit 8, the timing of changing the position of the liquid receiving unit 8, and the liquid. The timing of changing the moving speed of the receiving unit 8 can be adjusted. The vertical position of the liquid receiving unit 8 and the like are setting conditions of the substrate processing apparatus 100.
The processor 11 receives a signal from the motor encoder 812 indicating the rotation speed and rotation position of the liquid receiving motor 811. Based on the signal received from the motor encoder 812, the processor 11 determines the vertical position of the liquid receiving unit 8, the moving speed of the liquid receiving unit 8, the acceleration of the liquid receiving unit 8, and the timing of changing the position of the liquid receiving unit 8. And the change timing of the moving speed of the liquid receiving unit 8 is detected. The detected position of the liquid receiving portion 8 in the vertical direction is an execution condition at the time of etching execution. The processor 11 stores the detected information indicating the position of the liquid receiving unit 8 in the vertical direction in the storage unit 12.
The processor 11 can control the dimming lamp 103 to adjust the amount of light in the processing chamber 2. The amount of light in the processing chamber 2 is a setting condition of the substrate processing apparatus 100.
The processor 11 receives an image signal indicating the temperature distribution in the processing chamber 2 from the thermography camera 101. Based on the image signal received from the thermography camera 101, the processor 11 has the temperature of the processing liquid L at the tip of the processing liquid nozzle 41, the temperature of the gas G at the tip of the gas nozzle 71, the temperature of the surface of the substrate W, and the temperature of the partition wall 21. , The temperature of the liquid receiving unit 8, the temperature of the nozzle arm 43, the temperature of the spin base 31, and the like are detected. The detected temperature is an execution condition at the time of etching execution. The processor 11 stores information indicating the detected temperature in the storage unit 12.
The processor 11 receives an image pickup signal from the video camera 102. The information detected by the processor 11 based on the image pickup signal will be described below.
Based on the imaging signal, the processor 11 has a timing at which the processing liquid L starts to be discharged from the processing liquid nozzle 41 (a timing at which the processing liquid L is discharged) and a timing at which the treatment liquid L is stopped from the processing liquid nozzle 41. (Timing to stop discharging the treatment liquid L), change timing of the flow rate of the treatment liquid L discharged from the treatment liquid nozzle 41 (timing to change the discharge flow rate of the treatment liquid L), and flow rate of the treatment liquid L discharged from the treatment liquid nozzle 41. (Discharge flow rate rise characteristic of the treatment liquid L), the fall characteristic of the flow rate discharged from the treatment liquid L from the treatment liquid nozzle 41 (discharge flow rate fall characteristic of the treatment liquid L), and the gas G from the gas nozzle 71. Timing to start ejection (timing to start ejection of gas G), timing to stop ejection of gas G from gas nozzle 71 (timing to stop ejection of gas G), and timing to change the flow rate of gas G ejected from gas nozzle 71 (timing to change the flow rate of gas G to be ejected from gas nozzle 71) Gas G ejection flow rate change timing), gas G ejection flow rate rising characteristics from gas nozzle 71 (gas G ejection flow rate rising characteristics), and gas G ejection flow rate falling characteristics from gas nozzle 71 (gas G Detects the ejection flow rate falling characteristic). The detected discharge start timing of the processing liquid L is an execution condition at the time of etching execution. The processor 11 stores the information indicating the detected discharge start timing of the processing liquid L in the storage unit 12.
Based on the imaging signal, the processor 11 has a moving speed (suckback speed) of the processing liquid L sucked from the processing liquid nozzle 41 toward the upstream side of the processing liquid supply pipe 42 and a stop position of the sucked processing liquid L. (Suckback stop position) and is detected. The detected sackback speed and sackback stop position are execution conditions at the time of etching execution. The processor 11 stores the detected information indicating the suckback speed and the suckback stop position in the storage unit 12.
Based on the image pickup signal, the processor 11 detects whether or not the processing liquid L has dropped from the tip of the processing liquid nozzle 41 (whether or not the processing liquid L has dropped). The presence or absence of dropping is an execution condition at the time of etching execution. The processor 11 stores information indicating the presence or absence of dropping in the storage unit 12.
The processor 11 detects the film thickness distribution of the processing liquid L covering the entire surface of the substrate W based on the image pickup signal. The film thickness distribution of the treatment liquid L is an execution condition at the time of etching execution. The processor 11 stores information indicating the film thickness distribution of the processing liquid L in the storage unit 12.
The processor 11 detects the presence or absence of adhesion of the processing liquid L on the upper surface and the outer surface of the liquid receiving portion 8 based on the image pickup signal. Whether or not the treatment liquid L adheres to the upper surface and the outer surface of the liquid receiving portion 8 is an execution condition at the time of etching execution. The processor 11 stores in the storage unit 12 information indicating whether or not the processing liquid L is attached to the upper surface and the outer surface of the liquid receiving unit 8.
The processor 11 detects the amount of the processing liquid L adhering to the upper surface and the outer surface of the liquid receiving portion 8 based on the image pickup signal. The amount of the treatment liquid L adhering to the upper surface and the outer surface of the liquid receiving portion 8 is an execution condition at the time of etching execution. The processor 11 stores information indicating the amount of the processing liquid L adhering to the upper surface and the outer surface of the liquid receiving unit 8 in the storage unit 12.
The processor 11 detects the position of the processing liquid nozzle 41, the shape of the nozzle arm 43, the shape of the heater arm 52, the position of the rinse liquid nozzle 61, and the position of the gas nozzle 71 based on the image pickup signal. Further, the processor 11 determines the position of the processing liquid nozzle 41 based on the position of the processing liquid nozzle 41 detected based on the image pickup signal and the specified position of the processing liquid nozzle 41 stored in the storage unit 12. Detects the amount of deviation from. In other words, the change in the position of the processing liquid nozzle 41 is detected. Similarly, the processor 11 has the shape of the nozzle arm 43 detected based on the imaging signal, the shape of the heater arm 52, the position of the rinse liquid nozzle 61, the position of the gas nozzle 71, and the nozzle arm stored in the storage unit 12. Based on the specified shape of 43, the specified shape of the heater arm 52, the specified position of the rinse liquid nozzle 61, and the specified position of the gas nozzle 71, the shape of the nozzle arm 43 changes, the shape of the heater arm 52 changes, and the rinse liquid nozzle The change in the position of 61 and the change in the position of the gas nozzle 71 are detected. Changes in the position of the treatment liquid nozzle 41 and the like are execution conditions at the time of etching execution. The processor 11 stores information indicating a change in the position of the processing liquid nozzle 41 in the storage unit 12.
The processor 11 detects the position of the liquid receiving unit 8 and the shape of the liquid receiving unit 8 based on the image pickup signal. Further, the processor 11 determines the position of the liquid receiving unit 8 based on the position of the liquid receiving unit 8 detected based on the image pickup signal and the specified position of the liquid receiving unit 8 stored in the storage unit 12. The amount of deviation from the liquid receiving portion 8, that is, the change in the position of the liquid receiving portion 8 is detected. Similarly, the processor 11 changes the shape of the liquid receiving unit 8 based on the shape of the liquid receiving unit 8 detected based on the image pickup signal and the specified shape of the liquid receiving unit 8 stored in the storage unit 12. Is detected. The change in the position of the liquid receiving portion 8 and the change in the shape of the liquid receiving portion 8 are execution conditions at the time of etching execution. The processor 11 stores in the storage unit 12 information indicating a change in the position of the liquid receiving unit 8 and a change in the shape of the liquid receiving unit 8.
The processor 11 detects the shape of the chuck pin 32 based on the image pickup signal. Further, the processor 11 changes the shape of the chuck pin 32 from the specified shape based on the shape of the chuck pin 32 detected based on the image pickup signal and the specified shape of the chuck pin 32 stored in the storage unit 12. The amount, that is, the change in the shape of the chuck pin 32 is detected. The processor 11 further detects the degree of wear of the chuck pin 32 from the change in the shape of the chuck pin 32. The change in the shape of the chuck pin 32 and the degree of wear of the chuck pin 32 are execution conditions at the time of etching execution. The processor 11 stores in the storage unit 12 information indicating the change in the shape of the chuck pin 32 and the degree of wear of the chuck pin 32.
The processor 11 detects the distribution of the air flow (air flow distribution) of the gas flowing in the processing chamber 2 based on the image pickup signal. The airflow distribution is an execution condition at the time of etching execution. The processor 11 stores information indicating the airflow distribution in the storage unit 12.
The processor 11 detects the amount of eccentricity of the substrate W and the amount of surface runout of the substrate W based on the image pickup signal. The amount of eccentricity of the substrate W and the amount of surface runout of the substrate W are execution conditions at the time of etching execution. The processor 11 stores information indicating the amount of eccentricity of the substrate W and the amount of surface runout of the substrate W in the storage unit 12.
The substrate processing apparatus 100 has been described above with reference to FIGS. 1 and 3. Subsequently, the movement of the processing liquid nozzle 41 during the etching process will be described with reference to FIG. FIG. 4 is a diagram showing an example of a change in the position of the treatment liquid nozzle 41 and a change in the moving speed during the etching process. In FIG. 4, the vertical axis shows the moving speed of the processing liquid nozzle 41, and the horizontal axis shows the radial position of the substrate W.
As shown in FIG. 4, during the etching process, the processing liquid nozzle 41 moves from the center of the substrate W to the radial position c. Specifically, the processing liquid nozzle 41 moves while accelerating from the center of the substrate W to the radial position a. The moving speed of the processing liquid nozzle 41 when reaching the radial position a is Va. After that, the processing liquid nozzle 41 moves while decelerating from the radial position a to the radial position b. The moving speed of the processing liquid nozzle 41 when reaching the radial position b is Vb. When the treatment liquid nozzle 41 reaches the radial position b, it moves while further decelerating from the radial position b to the radial position c, and stops at the radial position c. In this way, the processing liquid nozzle 41 accelerates and decelerates during the etching process.
Subsequently, the substrate processing apparatus 100 of the present embodiment will be described with reference to FIGS. 1 and 5. FIG. 5 is a block diagram of the substrate processing apparatus 100. As shown in FIG. 5, the substrate processing apparatus 100 further includes a surface temperature sensor 104 and a surface potential sensor 105.
The surface temperature sensor 104 detects the temperature at which the infrared heater 51 heats the substrate W. Specifically, the surface temperature sensor 104 detects the surface temperature of the infrared heater 51. The processor 11 receives a signal from the surface temperature sensor 104 indicating the temperature at which the infrared heater 51 heats the substrate W (the substrate heating temperature). The substrate heating temperature is an execution condition at the time of etching execution. The processor 11 stores information indicating the substrate heating temperature in the storage unit 12.
The surface potential sensor 105 detects the potential on the surface of the substrate W. The processor 11 receives a signal indicating the potential of the surface of the substrate W (the substrate surface potential) from the surface potential sensor 105. The substrate surface potential is an execution condition at the time of etching execution. The processor 11 stores information indicating the substrate surface potential in the storage unit 12.
As shown in FIG. 5, the substrate processing apparatus 100 further includes a first differential pressure gauge 106, an air supply anemometer 107, and an air supply air volume meter 108.
The first differential pressure gauge 106 detects the differential pressure of the FFU 22. The first differential pressure gauge 106 is, for example, a fine differential pressure gauge. The processor 11 receives a signal indicating the differential pressure of the FFU 22 from the first differential pressure gauge 106. The differential pressure of FFU21 is an execution condition at the time of etching execution. The processor 11 stores information indicating the differential pressure of the FFU 22 in the storage unit 12.
The air supply anemometer 107 detects the air velocity (air supply anemometer) sent by the FFU 22 into the processing chamber 2. The processor 11 receives a signal indicating the air supply air velocity from the air supply air velocity meter 107. The air supply air velocity is an execution condition at the time of etching execution. The processor 11 stores information indicating the air supply air velocity in the storage unit 12.
The air supply air volume meter 108 detects the air volume (air supply air volume) of the air sent by the FFU 22 into the processing chamber 2. The processor 11 receives a signal indicating the air supply air volume from the air supply air volume meter 108. The air supply air volume is an execution condition at the time of etching execution. The processor 11 stores information indicating the supply air volume in the storage unit 12.
As shown in FIG. 5, the substrate processing device 100 further includes a second differential pressure gauge 109, an exhaust anemometer 110, and an exhaust air volume meter 111.
The second differential pressure gauge 109 detects the differential pressure of the valve 233. The second differential pressure gauge 109 is, for example, a fine differential pressure gauge. The processor 11 receives a signal indicating the differential pressure of the valve 233 from the second differential pressure gauge 109. The differential pressure of valve 233 corresponds to the exhaust pressure. The exhaust pressure is an execution condition at the time of etching execution. The processor 11 stores information indicating the differential pressure (exhaust pressure) of the valve 233 in the storage unit 12.
The exhaust anemometer 110 detects the wind speed (exhaust wind speed) of the gas exhausted from the processing chamber 2. The processor 11 receives a signal indicating the exhaust air velocity from the exhaust anemometer 110. The exhaust air velocity is an execution condition at the time of etching execution. The processor 11 stores information indicating the exhaust air velocity in the storage unit 12.
The exhaust air volume meter 111 detects the air volume (exhaust air volume) of the gas exhausted from the processing chamber 2. The processor 11 receives a signal indicating the exhaust air volume from the exhaust air volume meter 111. The exhaust air volume is an execution condition at the time of etching execution. The processor 11 stores information indicating the exhaust air volume in the storage unit 12.
As shown in FIG. 5, the substrate processing apparatus 100 further includes a light amount sensor 112, an atmosphere concentration sensor 113, a humidity sensor 114, an oxygen concentration sensor 115, an ammonia concentration sensor 116, and a VOC concentration sensor 117.
The light amount sensor 112 detects the amount of light in the processing chamber 2. The processor 11 receives a signal indicating the amount of light in the processing chamber 2 from the light amount sensor 112. The amount of light in the processing chamber 2 is an execution condition at the time of etching execution. The processor 11 stores information indicating the amount of light in the processing chamber 2 in the storage unit 12.
The atmosphere concentration sensor 113 detects the concentration of the processing liquid L that has become a gas in the processing chamber 2 (treatment liquid atmosphere concentration). The processor 11 receives a signal indicating the processing liquid atmosphere concentration from the atmosphere concentration sensor 113. The treatment liquid atmosphere concentration is an execution condition at the time of etching execution. The processor 11 stores information indicating the processing liquid atmosphere concentration in the storage unit 12.
The humidity sensor 114 detects the humidity in the processing chamber 2. The processor 11 receives a signal indicating the humidity in the processing chamber 2 from the humidity sensor 114. Humidity in the processing chamber 2 is an execution condition at the time of etching execution. The processor 11 stores information indicating the humidity in the processing chamber 2 in the storage unit 12.
The oxygen concentration sensor 115 detects the oxygen concentration in the processing chamber 2. The processor 11 receives a signal indicating the oxygen concentration in the processing chamber 2 from the oxygen concentration sensor 115. The oxygen concentration in the processing chamber 2 is an execution condition at the time of etching execution. The processor 11 stores information indicating the oxygen concentration in the processing chamber 2 in the storage unit 12.
The ammonia concentration sensor 116 detects the ammonia concentration in the processing chamber 2. The processor 11 receives a signal indicating the ammonia concentration in the processing chamber 2 from the ammonia concentration sensor 116. The ammonia concentration in the processing chamber 2 is an execution condition at the time of etching execution. The processor 11 stores information indicating the ammonia concentration in the processing chamber 2 in the storage unit 12.
The VOC concentration sensor 117 detects the concentration (VOC concentration) of volatile organic compounds (VOC) in the processing chamber 2. The processor 11 receives a signal indicating the VOC concentration in the processing chamber 2 from the VOC concentration sensor 117. The VOC concentration in the processing chamber 2 is an execution condition at the time of etching execution. The processor 11 stores information indicating the VOC concentration in the processing chamber 2 in the storage unit 12.
Subsequently, the treatment liquid supply unit 40 of the present embodiment will be described with reference to FIG. FIG. 6 is a schematic view of the processing liquid supply unit 40 of the present embodiment. As shown in FIG. 6, the substrate processing apparatus 100 includes a processing liquid supply unit 40. The treatment liquid supply unit 40 supplies the treatment liquid L to the treatment liquid nozzle 41. In addition to the processing liquid supply pipe 42 described with reference to FIG. 1, the processing liquid supply unit 40 includes a temperature sensor 421, a concentration sensor 422, a valve 423, a mixing valve 424, a flow meter 425, and a heater. It further includes a 426 and a sackback valve 427.
The temperature sensor 421 detects the temperature of the processing liquid L flowing through the processing liquid supply pipe 42. The concentration sensor 422 detects the concentration of the etching component contained in the processing liquid L flowing through the processing liquid supply pipe 42. Hereinafter, the concentration of the etching component contained in the treatment liquid L flowing through the treatment liquid supply pipe 42 may be referred to as first treatment liquid concentration.
The valve 423 is arranged in the processing liquid supply pipe 42. The valve 423 switches between supplying and stopping the supply of the processing liquid L to the processing liquid nozzle 41. Further, the valve 423 controls the flow rate of the processing liquid L flowing downstream of the valve 423 in the processing liquid supply pipe 42. Further, the valve 423 controls the discharge flow rate of the processing liquid L discharged from the processing liquid nozzle 41. Further, the valve 423 controls the rising characteristic and the falling characteristic of the discharge flow rate of the processing liquid L. Specifically, when the valve 423 is opened, the processing liquid L is discharged from the processing liquid nozzle 41 toward the substrate W. On the other hand, when the valve 423 is closed, the discharge of the processing liquid L is stopped. Further, the flow rate of the processing liquid L flowing downstream from the valve 423 is adjusted according to the opening degree of the valve 423. Therefore, the discharge flow rate of the processing liquid L is adjusted according to the opening degree of the valve 423. Further, the rising characteristic of the discharge flow rate of the processing liquid L is adjusted according to the opening speed of the valve 423, and the falling characteristic of the discharge flow rate of the processing liquid L is adjusted according to the closing speed of the valve 423. The valve 423 is, for example, a motor valve.
The mixing valve 424 is arranged in the processing liquid supply pipe 42. When the mixing valve 424 is opened, pure water flows into the treatment liquid supply pipe 42 to dilute the concentration of the first treatment liquid.
The flow meter 425 detects the flow rate of the processing liquid L flowing through the processing liquid supply pipe 42. In other words, the discharge flow rate of the processing liquid L is detected. The heating heater 426 heats the processing liquid L flowing through the processing liquid supply pipe 42.
The sackback valve 427 is arranged in the processing liquid supply pipe 42. The sackback valve 427 is provided on the downstream side of the valve 423 and changes the volume of the processing liquid supply flow path. More specifically, the sackback valve 427 has a diaphragm, and the volume of the processing liquid supply flow path is changed by inflowing pressurized air to deform the diaphragm. When the volume of the treatment liquid supply flow path increases due to the inflow of pressurized air, the pressure of the flow path of the treatment liquid nozzle 41 and the pressure of the treatment liquid supply flow path momentarily decrease, and the vicinity of the opening of the treatment liquid nozzle 41 A suction force acts on the treatment liquid L remaining in. In the present embodiment, after the discharge of the processing liquid L is stopped, the control unit 10 (processor 11) described with reference to FIGS. 3 and 5 controls the sackback valve 427 and joins the sackback valve 427. Inflow of pressure air. As a result, the treatment liquid L is sucked from the treatment liquid nozzle 41 toward the upstream side of the treatment liquid supply pipe 42.
Subsequently, the gas supply unit 70 will be described with reference to FIG. 7. FIG. 7 is a schematic view of the gas supply unit 70. As shown in FIG. 7, the substrate processing apparatus 100 includes a gas supply unit 70. In addition to the gas supply pipe 72 described with reference to FIG. 1, the gas supply unit 70 includes a regulator 721, a temperature sensor 722, a pressure sensor 723, a concentration sensor 724, a valve 725, a flow meter 726, and the like. Further provided with a heater 727.
The regulator 721 is arranged in the gas supply pipe 72. Regulator 721 regulates the pressure in the gas supply channel. The regulator 721 is, for example, an electropneumatic regulator.
The temperature sensor 722 detects the temperature of the gas G flowing through the gas supply pipe 72. The pressure sensor 723 detects the pressure in the gas supply flow path. The concentration sensor 724 detects the concentration of the inert component contained in the gas G. Hereinafter, the temperature of the gas G flowing through the gas supply pipe 72 may be described as the temperature of the gas G. In addition, the concentration of the inert component contained in Gus G may be described as "Gus G concentration".
The valve 725 is arranged in the gas supply pipe 72. The valve 725 controls the ejection flow rate of the gas G ejected from the gas nozzle 71. Further, the valve 725 controls the rising characteristic and the falling characteristic of the ejection flow rate of the gas G. Specifically, the ejection flow rate of the gas G is adjusted according to the opening degree of the valve 725. Further, the rising characteristic of the ejection flow rate of gas G is adjusted according to the opening speed of the valve 725, and the falling characteristic of the ejection flow rate of gas G is adjusted according to the closing speed of the valve 725. The valve 725 is, for example, a motor valve.
The flow meter 726 detects the flow rate of the gas G flowing through the gas supply pipe 72. In other words, the ejection flow rate of Gus G is detected. The heating heater 727 heats the gas G flowing through the gas supply pipe 72.
Subsequently, with reference to FIG. 8, the treatment liquid circulation unit 300, the first treatment liquid component supply unit 510, the second treatment liquid component supply unit 520, and the treatment liquid recovery unit 600 will be described. FIG. 8 is a schematic view showing the treatment liquid circulation unit 300, the first treatment liquid component supply unit 510, the second treatment liquid component supply unit 520, and the treatment liquid recovery unit 600 of the present embodiment. As shown in FIG. 8, the substrate processing apparatus 100 further includes a processing liquid circulation unit 300, a first processing liquid component supply unit 510, a second treatment liquid component supply unit 520, and a treatment liquid recovery unit 600.
The treatment liquid circulation unit 300 circulates the treatment liquid L. Specifically, the processing liquid circulation unit 300 includes a compounding tank 301, a circulation pipe 302, a heater 303, a pump 304, a valve 305, a relief valve 306, a relief pipe 307, a temperature sensor 308, and the like. It includes a concentration sensor 309, a pressure sensor 310, and a flow meter 311.
The compounding tank 301 contains the treatment liquid L. The circulation pipe 302 forms a circulation flow path through which the treatment liquid L circulates. The processing liquid supply pipe 42 is connected to the circulation pipe 302.
The heating heater 303 heats the processing liquid L flowing through the circulation pipe 302. The pump 304 is arranged in the circulation pipe 302. The pump 304 sucks up the processing liquid L from the compounding tank 301 and sends the processing liquid L to the circulation pipe 302.
The valve 305 is arranged in the circulation pipe 302. The valve 305 controls the flow rate of the processing liquid L flowing through the circulation pipe 302. Specifically, the flow rate of the processing liquid L flowing through the circulation pipe 302 is adjusted according to the opening degree of the valve 305. The valve 305 is, for example, a motor valve. Hereinafter, the flow rate of the processing liquid L flowing through the circulation pipe 302 may be described as treatment liquid circulation flow rate.
The relief valve 306 is arranged in the circulation pipe 302. The relief pipe 307 is connected to the relief valve 306. When the relief valve 306 is opened, the processing liquid L flows from the circulation pipe 302 to the relief pipe 307. The relief pipe 307 guides the processing liquid L flowing from the relief valve 306 to the compounding tank 301. The pressure in the circulation flow path is adjusted according to the opening degree of the relief valve 306.
The temperature sensor 308 detects the temperature of the processing liquid L flowing through the circulation pipe 302. The concentration sensor 309 detects the concentration of the etching component contained in the processing liquid L flowing through the circulation pipe 302. The pressure sensor 310 detects the pressure in the circulation flow path. The flow meter 311 detects the circulating flow rate of the processing liquid. Hereinafter, the temperature of the treatment liquid L flowing through the circulation pipe 302 may be referred to as second treatment liquid temperature. Further, the concentration of the etching component contained in the treatment liquid L flowing through the circulation pipe 302 may be described as "second treatment liquid concentration".
The first treatment liquid component supply unit 510 supplies the first treatment liquid component L1 to the compounding tank 301. The second treatment liquid component supply unit 520 supplies the second treatment liquid component L2 to the compounding tank 301. In the mixing tank 301, the first treatment liquid component L1 and the second treatment liquid component L2 are mixed to generate the treatment liquid L. For example, the first treatment liquid component L1 is phosphoric acid, hydrofluoric acid, nitric acid, or ammonium hydroxide, and the second treatment liquid component L2 is pure water. Alternatively, the first treatment liquid component L1 is hydrofluoric acid, and the second treatment liquid component L2 is a nitric acid aqueous solution. Alternatively, the first treatment liquid component L1 is an aqueous nitric acid solution, and the second treatment liquid component L2 is hydrofluoric acid. Alternatively, the first treatment liquid component L1 is ammonium hydroxide, and the second treatment liquid component L2 is a hydrogen peroxide solution. Alternatively, the first treatment liquid component L1 is a hydrogen peroxide solution, and the second treatment liquid component L2 is ammonium hydroxide.
The first processing liquid component supply unit 510 includes a pipe 511, a regulator 512, a pressure sensor 513, and a metering discharge pump 514. The pipe 511 forms a first treatment liquid component supply flow path through which the first treatment liquid component L1 flows. The pipe 511 guides the first treatment liquid component L1 to the compounding tank 301.
The regulator 512 is arranged in the pipe 511. The regulator 512 adjusts the pressure in the first processing liquid component supply flow path. The regulator 512 is, for example, an electropneumatic regulator.
The pressure sensor 513 detects the pressure in the first processing liquid component supply flow path. The metering discharge pump 514 is arranged in the pipe 511. The metering-rate discharge pump 514 discharges the first treatment liquid component L1 in a fixed amount.
The second processing liquid component supply unit 520 includes a pipe 521, a regulator 522, and a pressure sensor 523. The pipe 521 forms a second treatment liquid component supply flow path through which the second treatment liquid component L2 flows. The pipe 521 guides the second treatment liquid component L2 to the compounding tank 301.
The regulator 522 is arranged in the pipe 521. The regulator 522 adjusts the pressure in the second treatment liquid component supply flow path. The regulator 522 is, for example, an electropneumatic regulator. The pressure sensor 523 detects the pressure in the second processing liquid component supply flow path.
The treatment liquid recovery unit 600 supplies the used treatment liquid L sent from the treatment chamber 2 to the preparation tank 301. The treatment liquid recovery unit 600 includes a recovery tank 601, a first recovery pipe 602, a second recovery pipe 603, and a pump 604.
The first recovery pipe 602 guides the treated liquid L after use from the treatment chamber 2 to the recovery tank 601. The recovery tank 601 stores the treated liquid L after use. The second recovery pipe 603 guides the treated liquid L after use from the recovery tank 601 to the compounding tank 301. The pump 604 is arranged in the second recovery pipe 603. The pump 604 sucks up the used treatment liquid L from the recovery tank 601 and sends the used treatment liquid L to the second recovery pipe 603.
Subsequently, the substrate processing apparatus 100 of the present embodiment will be described with reference to FIGS. 6 to 9. FIG. 9 is a block diagram of the substrate processing apparatus 100. As shown in FIG. 9, the processor 11 executes a computer program stored in the storage unit 12, and executes a processing liquid supply unit 40, a gas supply unit 70, a processing liquid circulation unit 300, and a first processing liquid component supply unit. It controls 510, the second treatment liquid component supply unit 520, and the treatment liquid recovery unit 600.
Specifically, the processor 11 controls a valve 423, a mixing valve 424, a heating heater 426, and a suckback valve 427 included in the processing liquid supply unit 40.
The processor 11 can control the valve 423 and the mixing valve 424 to adjust the concentration of the etching component (first processing liquid concentration) contained in the processing liquid L flowing through the processing liquid supply pipe 42. The first processing liquid concentration is a setting condition of the substrate processing apparatus 100. Further, the processor 11 can control the valve 423 to adjust the discharge flow rate of the processing liquid L discharged from the processing liquid nozzle 41. Further, the processor 11 can control the valve 423 to adjust the rising characteristic and the falling characteristic of the discharge flow rate of the processing liquid L. The discharge flow rate of the treatment liquid L, the rising characteristic of the discharge flow rate of the treatment liquid L, and the falling characteristic of the discharge flow rate of the treatment liquid L are the setting conditions of the substrate processing apparatus 100.
Further, the processor 11 can adjust the discharge start timing of the processing liquid L by adjusting the generation timing of the signal for starting the discharge of the processing liquid L from the processing liquid nozzle 41. Specifically, the signal for starting the discharge of the processing liquid L is a signal for opening the valve 423, and the timing of generating the signal for opening the valve 423 can be adjusted to adjust the discharge start timing of the processing liquid L. .. The generation timing of the signal for opening the valve 423 is a setting condition of the substrate processing apparatus 100.
Further, the processor 11 can adjust the discharge stop timing of the processing liquid L by adjusting the generation timing of the signal for stopping the discharge of the processing liquid L from the processing liquid nozzle 41. Specifically, the signal for stopping the discharge of the processing liquid L is a signal for closing the valve 423, and the timing of generating the signal for closing the valve 423 can be adjusted to adjust the timing for stopping the discharge of the processing liquid L. .. The generation timing of the signal for closing the valve 423 is a setting condition of the substrate processing apparatus 100.
Further, the processor 11 can adjust the discharge flow rate change timing of the processing liquid L by adjusting the generation timing of the signal for changing the flow rate of the processing liquid L discharged from the processing liquid nozzle 41. Specifically, the signal for changing the flow rate discharged by the processing liquid L is a signal for changing the opening degree of the valve 423, and the generation timing of the signal for changing the opening degree of the valve 423 is adjusted to adjust the processing liquid L. The discharge flow rate change timing can be adjusted. The generation timing of the signal for changing the opening degree of the valve 423 is a setting condition of the substrate processing apparatus 100.
The processor 11 can control the heater 426 to adjust the temperature of the processing liquid L flowing through the processing liquid supply pipe 42. Hereinafter, the temperature of the treatment liquid L flowing through the treatment liquid supply pipe 42 may be referred to as first treatment liquid temperature. The first processing liquid temperature is a setting condition of the substrate processing apparatus 100.
The processor 11 can control the sackback valve 427 to adjust the sackback speed and the sackback stop position described with reference to FIGS. 1 and 3. The sackback speed and the sackback stop position are setting conditions of the substrate processing apparatus 100.
Further, the processor 11 receives signals from the temperature sensor 421, the concentration sensor 422, and the flow meter 425 included in the processing liquid supply unit 40. The signal output by the temperature sensor 421 indicates the temperature of the first processing liquid. The signal output by the concentration sensor 422 indicates the concentration of the first processing liquid. The signal output by the flow meter 425 indicates the discharge flow rate of the processing liquid L. The temperature of the first treatment liquid, the concentration of the first treatment liquid, and the discharge flow rate of the treatment liquid L are the execution conditions at the time of etching execution. The processor 11 stores in the storage unit 12 information indicating the temperature of the first treatment liquid, the concentration of the first treatment liquid, and the discharge flow rate of the treatment liquid L. Further, the processor 11 detects the purity of the processing liquid L based on the signal output by the concentration sensor 422. The purity of the treatment liquid L is an execution condition at the time of etching execution, and the processor 11 stores information indicating the purity of the treatment liquid L in the storage unit 12.
The processor 11 controls a regulator 721, a valve 725, and a heater 727 included in the gas supply unit 70.
The processor 11 can control the regulator 721 to adjust the pressure in the gas supply flow path. The pressure in the gas supply flow path is a setting condition of the substrate processing apparatus 100.
The processor 11 can control the valve 725 to adjust the ejection flow rate of the gas G ejected from the gas nozzle 71. Further, the processor 11 can control the valve 725 to adjust the rising characteristic and the falling characteristic of the ejection flow rate of the gas G. The ejection flow rate of the gas G, the rising characteristic of the ejection flow rate of the gas G, and the falling characteristic of the ejection flow rate of the gas G are the setting conditions of the substrate processing apparatus 100.
Further, the processor 11 can adjust the generation timing of the signal for starting the ejection of the gas G from the gas nozzle 71 to adjust the ejection start timing of the gas G. Specifically, the signal for starting the ejection of the gas G is a signal for opening the valve 725, and the timing for generating the signal for opening the valve 725 can be adjusted to adjust the timing for starting the ejection of the gas G. The generation timing of the signal for opening the valve 725 is a setting condition of the substrate processing apparatus 100.
Further, the processor 11 can adjust the generation timing of the signal for stopping the ejection of the gas G from the gas nozzle 71 to adjust the ejection stop timing of the gas G. Specifically, the signal for stopping the ejection of the gas G is a signal for closing the valve 725, and the timing of generating the signal for closing the valve 725 can be adjusted to adjust the timing for stopping the ejection of the gas G. The generation timing of the signal for closing the valve 725 is a setting condition of the substrate processing apparatus 100.
Further, the processor 11 can adjust the generation timing of the signal for changing the flow rate of the gas G ejected from the gas nozzle 71 to adjust the ejection flow rate change timing of the gas G. Specifically, the signal for changing the flow rate at which the gas G is ejected is a signal for changing the opening degree of the valve 725, and the generation timing of the signal for changing the opening degree of the valve 725 is adjusted to eject the gas G. The flow rate change timing can be adjusted. The generation timing of the signal for changing the opening degree of the valve 725 is a setting condition of the substrate processing apparatus 100.
The processor 11 can control the heater 727 to adjust the temperature of the gas G flowing through the gas supply pipe 72. The temperature of the gas G is a setting condition of the substrate processing apparatus 100.
Further, the processor 11 receives signals from the temperature sensor 722, the pressure sensor 723, the concentration sensor 724, and the flow meter 726 included in the processing liquid supply unit 40. The signal output by the temperature sensor 722 indicates the temperature of the gas G flowing through the gas supply pipe 72. The signal output by the pressure sensor 723 indicates the pressure in the gas supply flow path. The signal output by the concentration sensor 724 indicates the concentration of the inert component contained in the gas G (concentration of the gas G). The signal output by the flow meter 726 indicates the ejection flow rate of Gus G. The temperature of the gas G, the pressure of the gas supply flow path, the concentration of the gas G, and the ejection flow rate of the gas G are the execution conditions at the time of etching execution. The processor 11 stores information indicating the temperature of the gas G, the pressure of the gas supply flow path, the concentration of the gas G, and the ejection flow rate of the gas G in the storage unit 12. Further, the processor 11 detects the purity of Gus G based on the signal output by the concentration sensor 724. The purity of Gus G is an execution condition at the time of etching execution, and the processor 11 stores information indicating the purity of Gus G in the storage unit 12.
The processor 11 controls the heating heater 303, the pump 304, the valve 305, and the relief valve 306 included in the processing liquid circulation unit 300.
The processor 11 can control the heater 303 to adjust the temperature of the processing liquid L flowing through the circulation pipe 302 (second processing liquid temperature). The second processing liquid temperature is a setting condition of the substrate processing apparatus 100.
The processor 11 can control the valve 305 to adjust the flow rate of the processing liquid L flowing through the circulation pipe 302 (treatment liquid circulation flow rate). The processing liquid circulation flow rate is a setting condition of the substrate processing apparatus 100.
The processor 11 can control the relief valve 306 to adjust the pressure in the circulation flow path. The pressure in the circulation flow path is a setting condition of the substrate processing apparatus 100.
The processor 11 receives signals from the temperature sensor 308, the concentration sensor 309, the pressure sensor 310, and the flow meter 311 included in the processing liquid circulation unit 300. The signal output by the temperature sensor 308 indicates the temperature of the processing liquid L flowing through the circulation pipe 302 (second processing liquid temperature). The signal output by the concentration sensor 309 indicates the concentration of the etching component (second processing liquid concentration) contained in the processing liquid L flowing through the circulation pipe 302. The signal output by the pressure sensor 310 indicates the pressure in the circulation flow path. The signal output by the flow meter 311 indicates the circulating flow rate of the processing liquid. The second treatment liquid temperature, the second treatment liquid concentration, the pressure of the circulation flow path, and the treatment liquid circulation flow rate are the execution conditions at the time of etching execution. The processor 11 stores in the storage unit 12 information indicating the second processing liquid temperature, the second processing liquid concentration, the pressure of the circulation flow path, and the treatment liquid circulation flow rate.
The processor 11 controls the regulator 512 and the metering discharge pump 514 included in the first processing liquid component supply unit 510. The processor 11 can control the regulator 512 to adjust the pressure in the first processing liquid component supply flow path. Further, the processor 11 can control the fixed-quantity discharge pump 514 to adjust the concentration of the second processing liquid. The pressure of the first processing liquid component supply flow path and the second treatment liquid concentration are the setting conditions of the substrate processing apparatus 100.
The processor 11 receives a signal from the pressure sensor 513 included in the first processing liquid component supply unit 510. The signal output by the pressure sensor 513 indicates the pressure in the first processing liquid component supply flow path. The pressure in the first treatment liquid component supply flow path is an execution condition at the time of etching execution. The processor 11 stores information indicating the pressure in the first processing liquid component supply flow path in the storage unit 12.
The processor 11 can control the regulator 522 included in the second treatment liquid component supply unit 520 to adjust the pressure in the second treatment liquid component supply flow path. The pressure in the second processing liquid component supply flow path is a setting condition of the substrate processing apparatus 100.
The processor 11 receives a signal from the pressure sensor 523 included in the second processing liquid component supply unit 520. The signal output by the pressure sensor 523 indicates the pressure in the second processing liquid component supply flow path. The pressure in the second treatment liquid component supply flow path is an execution condition at the time of etching execution. The processor 11 stores information indicating the pressure in the second processing liquid component supply flow path in the storage unit 12.
Subsequently, the substrate processing system 1000 of this embodiment will be described with reference to FIG. FIG. 10 is a schematic view of the substrate processing system 1000 of this embodiment. As shown in FIG. 10, the substrate processing system 1000 includes a substrate processing apparatus 100 and an inspection apparatus 200.
The substrate processing apparatus 100 etches the substrate W as described with reference to FIGS. 1 and 2. Hereinafter, the substrate W before being etched (the substrate W before being carried into the processing chamber 2) may be referred to as "unprocessed substrate Wb". Further, the substrate W after being etched may be described as "processed substrate Wa".
The inspection device 200 inspects the processed substrate Wa and creates inspection result data of the processed substrate Wa. The inspection result data shows the execution result of etching. Specifically, the inspection device 200 measures the film thickness at each radial position of the processed substrate Wa. Further, the inspection device 200 creates data indicating the etching amount for each radial position of the processed substrate Wa based on the measured film thickness data and the film thickness distribution data of the unprocessed substrate Wb.
Subsequently, with reference to FIG. 11, the etching amount for each radial position of the processed substrate Wa will be described. FIG. 11 is a diagram showing an example of the etching amount for each radial position of the processed substrate Wa. In other words, FIG. 11 shows an example of an etching profile. The etching profile is created by plotting the etching amount for each radial position of the processed substrate Wa. In FIG. 11, the vertical axis indicates the etching amount, and the horizontal axis indicates the radial position of the processed substrate Wa.
It is desirable that the etching amount matches the target value over the entire area of the treated substrate Wa, but as shown in FIG. 11, the actual etching amount varies. Therefore, the etching amount is an index of the performance or state of the substrate processing apparatus 100. In other words, the etching amount in the entire area of the processed substrate Wa is a feature amount of the etching execution result.
Further, it is desirable that the etching amount is uniform over the entire area of the treated substrate Wa. Therefore, the uniformity (dispersion) of the etching amount is an index of the state or performance of the substrate processing apparatus 100. In other words, the uniformity of the etching amount is a feature amount of the etching execution result.
The data indicating the uniformity of the etching amount is not limited to dispersion. For example, the maximum value Emax and the minimum value Emin of the etching amount, and the average value of the etching amount also indicate the uniformity of the etching amount. Therefore, the maximum value Emax and the minimum value Emin of the etching amount, and the average value of the etching amount are also the feature quantities of the etching execution result. The etching profile also shows the uniformity of the etching amount. Therefore, the etching profile is also a feature amount of the etching execution result.
Subsequently, the substrate processing apparatus 100 of the present embodiment will be described with reference to FIG. FIG. 12 is a block diagram of the substrate processing apparatus 100 of the present embodiment. As shown in FIG. 12, the substrate processing apparatus 100 further includes an input unit 13.
The input unit 13 is a user interface device operated by an operator. The input unit 13 inputs data according to the operation of the operator to the processor 11. For example, the input unit 13 includes a keyboard and a mouse. The input unit 13 may include a touch display. In the present embodiment, the operator operates the input unit 13 to input the feature amount of the etching execution result to the processor 11. The processor 11 stores the feature amount of the etching execution result in the storage unit 12.
Specifically, the operator operates the input unit 13 to input data indicating the etching amount in the entire area of the processed substrate Wa and data indicating the uniformity of the etching amount. The data indicating the etching amount in the entire area of the processed substrate Wa can be an etching profile. The operator may input one of the etching amount in the entire area of the processed substrate Wa and the uniformity (dispersion) of the etching amount. Further, the operator may input at least one of the maximum value Emax and the minimum value Emin of the etching amount and the average value of the etching amount in place of the dispersion or in addition to the dispersion. The uniformity (dispersion) of the etching amount may be calculated by the operator or the inspection device 200. Similarly, the maximum value Emax and the minimum value Emin of the etching amount, and the average value of the etching amount may be calculated by the operator or the inspection device 200.
The processor 11 stores the various execution conditions described with reference to FIGS. 3, 5 and 9 and the feature amount of the etching execution result in the storage unit 12. Further, in the storage unit 12, as execution conditions, data indicating the type of film possessed by the unprocessed substrate Wb, data indicating the film thickness distribution of the unprocessed substrate Wb, and data indicating the thickness of the unprocessed substrate Wb are provided. Data indicating the surface state of the unprocessed substrate Wb is stored in advance. The type of film includes, for example, at least one of a silicon oxide film and a silicon nitride film.
The processor 11 corrects correction data that corrects at least one of the various setting conditions described with reference to FIGS. 3 and 9 based on various execution conditions and the feature amount of the etching execution result. To generate.
Subsequently, with reference to FIG. 13, a method of correcting the setting conditions executed by the substrate processing apparatus 100 of the present embodiment will be described. FIG. 13 is a flowchart showing a correction method of the present embodiment. As shown in FIG. 13, the correction method of the present embodiment includes steps S11 to S13.
When correcting the setting conditions, the processor 11 first stores the execution conditions described with reference to FIGS. 3, 5, 9, and 12 and the feature quantities described with reference to FIG. To memorize (step S11).
Next, the processor 11 reads the execution condition and the feature amount from the storage unit 12 and acquires them, and based on the acquired execution condition and the feature amount, among the various setting conditions described with reference to FIGS. 3 and 9. Generate correction data that corrects at least one setting condition (step S12).
Next, the processor 11 corrects the corresponding setting condition based on the correction data (step S13), and ends the process shown in FIG.
The processor 11 of the present embodiment uses the trained model generated by machine learning to generate correction data. Specifically, the processor 11 inputs the execution conditions and the feature quantities read from the storage unit 12 into the trained model. As a result, correction data is output from the trained model. Machine learning is, for example, one of supervised learning, unsupervised learning, semi-supervised learning, reinforcement learning, and deep learning.
Subsequently, the trained model 130 of the present embodiment will be described with reference to FIG. FIG. 14 is a schematic diagram of the trained model 130. As shown in FIG. 14, the trained model 130 is a neural network. The processor 11 uses a neural network to generate correction data. Hereinafter, the trained model 130 may be referred to as "neural network 130".
As shown in FIG. 14, the neural network 130 has an input layer 131, an intermediate layer 132, and an output layer 133. The processor 11 inputs the execution conditions and the feature amount read from the storage unit 12 to the input layer 131. As a result, the correction data is output from the output layer 133. The setting condition to be corrected may be predetermined, or the neural network 130 may determine the setting condition to be corrected. Further, although the neural network 130 shown in FIG. 14 has one intermediate layer 132, the neural network 130 may have a multi-layer structure.
Subsequently, with reference to FIG. 15, machine learning executed by the substrate processing apparatus 100 of the present embodiment will be described. FIG. 15 is a flowchart showing a learning method of the present embodiment. As shown in FIG. 15, the learning method of the present embodiment includes steps S21 to S23.
When executing machine learning, teacher information (teacher data) is input to processor 11 (step S21). The processor 11 stores the input teacher information in the storage unit 12. The teacher information is information obtained when the feature quantity explained with reference to FIG. 12 shows an optimum value. That is, the teacher information includes the execution condition obtained when the feature amount shows the optimum value and the feature amount showing the optimum value. Further, the teacher information includes setting conditions obtained when the feature amount shows an optimum value.
Next, the processor 11 reads and acquires teacher information (execution conditions, features, and setting conditions) from the storage unit 12, executes machine learning based on the acquired teacher information (step S22), and trained model 130. Is generated (step S23), and the process shown in FIG. 15 is terminated. Specifically, the processor 11 measures the change in the etching amount according to the execution condition and the setting condition and the change in the uniformity of the etching amount according to the execution condition and the setting condition from the plurality of teacher information, and the measurement result. Update the weighting factor based on.
The first embodiment has been described above. According to this embodiment, the operator can correct (adjust) the setting conditions without manually changing the setting conditions. Therefore, the burden on the operator can be reduced.
The setting conditions may be a part of the setting conditions described in the present embodiment.
Further, the environmental conditions of the factory where the substrate processing apparatus 100 is installed may be added to the execution conditions. Specifically, the processor 11 uses information indicating the temperature, humidity, oxygen concentration, ammonia concentration, VOC concentration and atmospheric pressure of the atmosphere in which the substrate processing apparatus 100 is installed, and the altitude of the place where the factory is installed as execution conditions. You may enter in. In this case, temperature data, humidity data, oxygen concentration data, ammonia concentration data, VOC concentration are obtained from the temperature sensor, humidity sensor, oxygen concentration sensor, ammonia concentration sensor, VOC concentration sensor, pressure sensor, and altitude sensor installed in the factory. Data, pressure data, and altitude data are input to processor 11.
[Embodiment 2]
Subsequently, the second embodiment of the present invention will be described with reference to FIG. However, the matters different from the first embodiment will be explained, and the same matters as the first embodiment will be omitted. The second embodiment is different from the first embodiment in that the correction data generation device 1100 generates correction data.
FIG. 16 is a schematic view of the substrate processing system 1000 according to the second embodiment. As shown in FIG. 16, the substrate processing system 1000 according to the second embodiment includes a substrate processing apparatus 100, an inspection apparatus 200, and a correction data generation apparatus 1100.
The board processing device 100 includes a communication interface 14. The communication interface 14 controls communication with the correction data generator 1100. Specifically, the communication interface 14 transmits data indicating execution conditions to the correction data generator 1100. Further, the communication interface 14 receives the correction data from the correction data generation device 1100. The communication interface 14 is, for example, a LAN board or a wireless LAN board. The board processing device 100 corrects (adjusts) the setting conditions of the correction target based on the correction data received from the correction data generation device 1100.
The inspection device 200 includes a communication interface 201. The communication interface 201 controls communication with the correction data generator 1100. Specifically, the communication interface 201 transmits data indicating the feature amount to the correction data generation device 1100. The communication interface 201 is, for example, a LAN board or a wireless LAN board.
The correction data generation device 1100 includes a communication interface 1101 and a control unit 1110. The correction data generation device 1100 is, for example, a server device.
The communication interface 1101 controls communication with the board processing device 100 and communication with the inspection device 200. Specifically, the communication interface 1101 receives data indicating execution conditions from the board processing device 100. Further, the communication interface 1101 receives data indicating a feature amount from the inspection device 200. Further, the communication interface 1101 transmits correction data to the substrate processing device 100.
The control unit 1110 generates correction data based on the execution conditions received from the substrate processing device 100 and the feature amount from the inspection device 200. Specifically, the control unit 1110 includes a processor 1111 and a storage unit 1112. Processor 1111 is, for example, a central processing unit (CPU). Alternatively, the processor 1111 is a general-purpose arithmetic unit. The storage unit 1112 stores data and computer programs. The storage unit 1112 includes a main storage device and an auxiliary storage device. The main storage device is composed of, for example, a semiconductor memory. The auxiliary storage device is composed of, for example, a semiconductor memory and / or a hard disk drive. The storage unit 1112 may include removable media.
The processor 1111 generates correction data based on the execution conditions and the feature amount, similarly to the processor 11 described in the first embodiment. When the processor 1111 generates the correction data, the processor 1111 transmits the correction data to the board processing device 100 via the communication interface 1101. Further, the processor 1111 generates the trained model 130 based on the teacher information (teacher data) as in the processor 11 described in the first embodiment. Of the teacher information, the data indicating the execution conditions and the data indicating the setting conditions are transmitted by the board processing device 100 to the correction data generation device 1100. Further, among the teacher information, the data indicating the feature amount is transmitted by the inspection device 200 to the correction data generation device 1100.
The second embodiment has been described above. According to the present embodiment , as in the first embodiment , the operator can correct (adjust) the setting conditions without manually changing the setting conditions. Therefore, the burden on the operator can be reduced.
The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and can be implemented in various aspects without departing from the gist thereof.
For example, in the embodiment of the present invention, the inspection device 200 measures the film thickness, but the substrate processing device 100 may include a film thickness measurement sensor for measuring the film thickness.
Further, in the embodiment of the present invention, the etching amount for each radial position of the processed substrate Wa is plotted to prepare an etching profile, but an etching profile may be created based on the measurement result of the thickness of the treated substrate Wa. Good.
Further, in the embodiment of the present invention, the processor 11 determines the temperature of the processing liquid L at the tip of the processing liquid nozzle 41 and the gas at the tip of the gas nozzle 71 based on the image signal (temperature distribution data) generated by the thermography camera 101. Although the temperature of G was detected, the processor 11 detected the temperature of the processing liquid L at the tip of the processing liquid nozzle 41 and the temperature of the gas G at the tip of the gas nozzle 71 based on the output signals of the temperature sensor 421 and the temperature sensor 722. And may be detected.
Further, in the embodiment of the present invention, the processor 11 determines the discharge start timing of the processing liquid L, the discharge stop timing of the processing liquid L, the discharge flow rate change timing of the processing liquid L, based on the image pickup signal generated by the video camera 102. Treatment liquid L discharge flow rate rise characteristic, treatment liquid L discharge flow rate fall characteristic, gas G ejection start timing, gas G ejection stop timing, gas G ejection flow rate change timing, gas G ejection flow rate rise characteristic, and Although the ejection flow rate falling characteristic of the gas G is detected, the processor 11 may detect the discharge start timing of the processing liquid L or the like based on the output signals of the flow meter 425 and the flow meter 726.
Further, in the embodiment of the present invention, the purity of the treatment liquid L is detected by using the concentration sensor 422, but the purity of the treatment liquid L may be detected by using a resistivity meter. Similarly, in the embodiment of the present invention, the purity of Gus G is detected by using the concentration sensor 724, but the purity of Gus G may be detected by using a resistivity meter.
Further, in the embodiment of the present invention, the eccentricity amount of the substrate W and the surface runout amount of the substrate W are detected by using the video camera 102, but the eccentricity amount of the substrate W and the surface runout amount of the substrate W are measured by using the displacement sensor. It may be detected.
Further, the correction data may be generated by using some of the execution conditions described in the embodiment of the present invention. It should be noted that preferably, the execution conditions to be used are the exhaust air velocity, the exhaust air volume, the rotation speed of the substrate W, the rotation acceleration of the substrate W, the change timing of the rotation speed of the substrate W, the position in the radial direction of the treatment liquid nozzle 41, and the treatment liquid. Movement speed of nozzle 41, acceleration of treatment liquid nozzle 41, change timing of radial position of treatment liquid nozzle 41, change timing of movement speed of treatment liquid nozzle 41, vertical position of liquid receiving part 8, liquid receiving part 8 moving speed, acceleration of liquid receiving part 8, change timing of vertical position of liquid receiving part 8, change timing of moving speed of liquid receiving part 8, temperature of processing liquid L at the tip of processing liquid nozzle 41, gas nozzle Gas G temperature at the tip of 71, substrate surface temperature, treatment liquid L discharge start timing, treatment liquid L discharge stop timing, treatment liquid L discharge flow rate change timing, treatment liquid L discharge flow rate rise characteristic, treatment liquid L Discharge flow rate falling characteristic, gas G ejection start timing, gas G ejection stop timing, gas G ejection flow rate change timing, gas G ejection flow rate rising characteristic, gas G ejection flow rate falling characteristic, processing liquid L Suckback speed, suckback stop position of the treatment liquid L, presence / absence of dripping of the treatment liquid L, film thickness distribution of the treatment liquid L, presence / absence of adhesion of the treatment liquid L on the upper surface and outer surface of the liquid receiving portion 8, liquid receiving Amount of treatment liquid L adhering to the upper surface and outer surface of part 8, eccentricity of substrate W, surface runout of substrate W, air supply air velocity, air supply air volume, first treatment liquid concentration, discharge of treatment liquid L Flow rate, gas G ejection flow rate, FFU21 differential pressure, substrate heating temperature, light intensity in processing chamber 2, liquid receiving unit 8, nozzle arm 43 temperature, spin base 31 temperature, partition wall 21 temperature, processing liquid Purity of L, purity of gas G, change in position of treatment liquid nozzle 41, change in shape of nozzle arm 43, change in shape of heater arm 52, change in position of rinse liquid nozzle 61, change in position of gas nozzle 71, Change in position of liquid receiving part 8, change in shape of liquid receiving part 8, change in shape of chuck pin 32, degree of wear of chuck pin 32, flow rate Distribution, substrate surface potential, differential pressure of valve 233, processing liquid atmosphere concentration, humidity in processing chamber 2, oxygen concentration in processing chamber 2, ammonia concentration in processing chamber 2, VOC concentration in processing chamber 2, and circulation Includes at least one of the flow path pressures. More preferably, the execution conditions to be used are the exhaust air velocity, the exhaust air volume, the rotation speed of the substrate W, the rotation acceleration of the substrate W, the change timing of the rotation speed of the substrate W, the radial position of the treatment liquid nozzle 41, and the treatment liquid nozzle. 41 moving speed, acceleration of processing liquid nozzle 41, change timing of radial position of processing liquid nozzle 41, change timing of moving speed of processing liquid nozzle 41, vertical position of liquid receiving part 8, liquid receiving part 8 Movement rate, acceleration of liquid receiving part 8, change timing of vertical position of liquid receiving part 8, change timing of moving speed of liquid receiving part 8, temperature of processing liquid L at the tip of processing liquid nozzle 41, gas nozzle 71 Gas G temperature, substrate surface temperature, treatment liquid L discharge start timing, treatment liquid L discharge stop timing, treatment liquid L discharge flow rate change timing, treatment liquid L discharge flow rate rise characteristic, treatment liquid L Discharge flow rate falling characteristic, gas G ejection start timing, gas G ejection stop timing, gas G ejection flow rate change timing, gas G ejection flow rate rising characteristic, gas G ejection flow rate falling characteristic, processing liquid L sack Back speed, suckback stop position of treatment liquid L, presence / absence of dripping of treatment liquid L, film thickness distribution of treatment liquid L, presence / absence of adhesion of treatment liquid L on upper surface and outer surface of liquid receiving portion 8, liquid receiving portion Amount of treatment liquid L adhering to the upper surface and outer surface of 8, substrate W eccentricity amount, substrate W surface runout amount, air supply air velocity, air supply air volume, first treatment liquid concentration, discharge flow rate of treatment liquid L , Includes at least one of the gas G ejection flow rates.
Further, in the embodiment of the present invention, the substrate W is a semiconductor wafer, but the substrate W is a substrate for a liquid crystal display device, a substrate for a field emission display (FED), a substrate for an optical disk, and a substrate for a magnetic disk. , A substrate for an optical magnetic disk, a substrate for a photomask, a ceramic substrate, and a substrate for a solar cell.
Further, in the embodiment of the present invention, the spin chuck 3 is a holding type chuck in which a plurality of chuck pins 32 are brought into contact with the peripheral end surface of the substrate W, whereas the spin chuck 3 is the substrate W which is a non-device forming surface. It may be a vacuum type chuck that holds the substrate W horizontally by attracting the back surface (lower surface) of the spin base 31 to the upper surface of the spin base 31.
Further, in the embodiment of the present invention, the substrate processing device 100 is a single-wafer type that processes the substrates W one by one, but the substrate processing apparatus 100 is a batch type that processes a plurality of substrates W at the same time. Good.
The present invention is suitably used for a substrate processing apparatus for processing a substrate.
2 Processing chamber 8 Liquid receiving unit 10 Control unit 40 Processing liquid supply unit 41 Processing liquid nozzle 70 Gas supply unit 71 Gas nozzle 72 Gas supply piping 100 Board processing device 200 Inspection device 231 Exhaust fan 232 Exhaust duct 233 Valve 300 Processing liquid circulation unit 510 1st treatment liquid component supply unit 520 2nd treatment liquid component supply unit 1000 Board processing system 1100 Correction data generator 1110 Control unit W board
17 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10 Sheet 11 Sheet 12 Sheet 13 Sheet 14 Sheet 15 Sheet 16 Sheet 17
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Numbers
- Publication
- 2020004817
- Application
- 121963
Titles2
- Japanese
- 補正方法、基板処理装置、及び基板処理システム
- English
- Correction method, board processing device, and board processing system
Classification
- CPC, 2
- H10P52/00
- H10P50/00
- IPC, 2
- H01L21 306
- H01L21 304