Flexible single-crystal film and method of manufacturing the same
36 claims: 36 independent, 0 dependent
- 1ベースウェーハ及び貼合せウェーハを用意するステップと、 前記ベースウェーハに1以上の埋め込み絶縁層を形成するステップと、 前記貼合せウェーハに水素イオンを注入するステップと、 前記ベースウェーハと貼合せウェーハを貼り合わせるステップと、 前記貼合せウェーハを割るステップと、 前記貼合せウェーハの劈開面をエッチングすることにより、ベースウェーハの埋め込み絶縁層の上に単結晶層が形成されたSOIウェーハを製造するステップと、 前記単結晶層の上に 酸化膜および窒化膜を積層形成して 1以上の保護絶縁層を形成するステップと、 前記ベースウェーハを 湿式エッチングして 除去するステップと、 HFを用いた湿式エッチング方法により 1以上の絶縁層を除去するステップと、 を含むことを特徴とする可撓性フィルムの製造方法。
- 2前記ベースウェーハの上に1以上の埋め込み絶縁層を形成するステップは、 前記ベースウェーハの上に窒化膜を形成するステップと、 前記窒化膜の上に酸化膜を形成するステップと、を更に含むことを特徴とする請求項 1 記載の可撓性フィルムの製造方法。
- 3前記ベースウェーハと貼合せウェーハを貼り合わせる前に、洗浄を行うステップを更に含むことを特徴とする請求項 1又は2 記載の可撓性フィルムの製造方法。
- 4前記ベースウェーハを湿式エッチングするときにKOHを用いることを特徴とする請求項 1 記載の可撓性フィルムの製造方法。
- 5ベースウェーハ及び貼合せウェーハを用意するステップと、 前記ベースウェーハに1以上の埋め込み絶縁層を形成するステップと、 前記貼合せウェーハに水素イオンを注入するステップと、 前記ベースウェーハと貼合せウェーハを貼り合わせるステップと、 前記貼合せウェーハを割るステップと、 前記貼合せウェーハの劈開面をエッチングすることにより、ベースウェーハの埋め込み絶縁層の上に単結晶層が形成されたSOIウェーハを製造するステップと、 前記単結晶層の上に酸化膜および窒化膜を積層形成して1以上の保護絶縁層を形成するステップと、 前記ベースウェーハを湿式エッチングして除去するステップと、 H Fを用いた湿式エッチング方法により単結晶層の上に 形成された 前記1以上の埋め込み絶縁層又は前記1以上の保護絶縁層 のうちいずれか一方 を除去するステップ と、 を含むことを特徴とす る可 撓性フィルムの製造方法。
- 6ベースウェーハ及び貼合せウェーハを用意するステップと、 前記ベースウェーハに1以上の埋め込み絶縁層を形成するステップと、 前記貼合せウェーハに水素イオンを注入するステップと、 前記ベースウェーハと貼合せウェーハを貼り合わせるステップと、 前記貼合せウェーハを割るステップと、 前記貼合せウェーハの劈開面をエッチングすることにより、ベースウェーハの埋め込み絶縁層の上に単結晶層が形成されたSOIウェーハを製造するステップと、 前記単結晶層の上に酸化膜および窒化膜を積層形成して1以上の保護絶縁層を形成するステップと、 前 記ベースウェーハを所望の厚さに研磨するステップと、 ベースウェーハを湿式エッチングして研磨した後、ベースウェーハの残留物を除去するステップと、 HFを用いた湿式エッチング方法により1以上の絶縁層を除去するステップと、 を含むことを特徴とす る可 撓性フィルムの製造方法。
- 7前記ベースウェーハを湿式エッチングするときにKOHを用いることを特徴とする請求項 6 記載の可撓性フィルムの製造方法。
- 8前記ベースウェーハを除去するステップは、 前記ベースウェーハを研磨する前に、保護絶縁層の上にワックスを塗布して前記SOIウェーハと支持ウェーハを貼り合わせるステップと、 前記ベースウェーハを研磨した後、前記支持ウェーハを除去するステップと、を含むことを特徴とする請求項 6 記載の可撓性フィルムの製造方法。
- 9前記1以上の絶縁層を除去するステップは、HFを用いた湿式エッチング方法により保護及び埋め込み絶縁層を共に除去するステップを含むことを特徴とする請求項 6 記載の可撓性フィルムの製造方法。
- 10前記1以上の絶縁層を除去するステップは、HFを用いた湿式エッチング方法により単結晶層の上に 形成された 前記1以上の埋め込み絶縁層又は前記1以上の保護絶縁層 のうちいずれか一方 を除去するステップを含むことを特徴とする請求項 6 記載の可撓性フィルムの製造方法。
- 11ベースウェーハ、前記ベースウェーハの上に形成された1以上の絶縁層、前記1以上の絶縁層の上に形成された単結晶層と、を有するSOIウェーハを用意するステップと、 前記SOIウェーハのエッジを治具により保持して 前記ベースウェーハの下面 の全体 が露出されるよう にS OIウェーハを保持するステップと、 前記ベースウェーハをエッチングして除去するステップと、 を含むことを特徴とする可撓性フィルムの製造方法。
- 12ベースウェーハ、前記ベースウェーハの上に形成された1以上の絶縁層、前記1以上の絶縁層の上に形成された単結晶層と、を有するSOIウェーハを用意するステップと、 前記 SOIウェーハの周縁部を治具により保持してベースウェーハの下面の一部 が 露出さ れ る ようにSOIウェーハを保持する ステップ と、 前記ベースウェーハをエッチングして除去するステップと、 を含むことを特徴とす る可 撓性フィルムの製造方法。
- 13前記ベースウェーハを除去するステップは、治具により保持していた周縁部を切断するステップを含むことを特徴とする請求項 12 記載の可撓性フィルムの製造方法。
- 14前記ベースウェーハを除去するステップは、ベースウェーハを湿式エッチングするステップを含むことを特徴とする請求項 11ないし13 いずれか1項に記載の可撓性フィルムの製造方法。
- 15前記ベースウェーハを湿式エッチングするときにKOHを用いることを特徴とする請求項 14 記載の可撓性フィルムの製造方法。
- 16HFを用いて湿式エッチングを行うことで1以上の絶縁層を除去するステップを更に含むことを特徴とする請求項 14 記載の可撓性フィルムの製造方法。
- 17HFを用いて湿式エッチングを行うことで1以上の絶縁層を除去するステップは、治具を緩めてSOIウェーハをエッチング液に浸漬するステップを含むことを特徴とする請求項 16 記載の可撓性フィルムの製造方法。
- 18ベースウェーハ、前記ベースウェーハの上に形成された1以上の埋め込み絶縁層、前記1以上の埋め込み絶縁層の上に形成された単結晶層 と、 を有するSOIウェーハを用意するステップと、 前記SOIウェーハの単結晶層と支持ウェーハを貼り合わせるステップと、 前記ベースウェーハ及び前記支持ウェーハを除去するステップと、 を含み、 前記ベースウェーハを除去するステップは、 所定の厚さまで前記ベースウェーハを研磨するステップと、 前記支持ウェーハを除去するステップと、 研磨後にベースウェーハの残留物の下部面が露出されるように治具によりSOIウェーハを保持するステップと、 湿式エッチングによりベースウェーハの残留物を除去するステップと、 を含むことを特徴とする可撓性フィルムの製造方法。
- 19ベースウェーハ、前記ベースウェーハの上に形成された1以上の埋め込み絶縁層、前記1以上の埋め込み絶縁層の上に形成された単結晶層と、を有するSOIウェーハを用意するステップと、 前記SOIウェーハの単結晶層と支持ウェーハを貼り合わせるステップと、 前記ベースウェーハ及び前記支持ウェーハを除去するステップと、 を含み、 前記ベースウェーハを除去するステップは、 所定の厚さまで前記ベースウェーハを研磨するステップと、 研磨後にベースウェーハの残留物の下部面が露出されるように治具によりSOIウェーハを保持するステップと、 湿式エッチングによりベースウェーハの残留物を除去するステップと、 前記支持ウェーハを除去するステップと、 を含むことを特徴とす る可 撓性フィルムの製造方法。
- 20ベースウェーハ、前記ベースウェーハの上に形成された1以上の埋め込み絶縁層、前記1以上の埋め込み絶縁層の上に形成された単結晶層 と、 を有するSOIウェーハを用意するステップと、 前記単結晶層の上に1以上の保護絶縁層を形成するステップと、 前記ベースウェーハを所定の厚さに研磨するステップと、 研磨後に、 前記SOIウェーハのエッジを治具により保持して 前記ベースウェーハの残留物の下面 の全体 が露出されるよう にS OIウェーハを保持するステップと、 ベースウェーハの残留物を湿式エッチングして除去するステップと、 前記1以上の埋め込み絶縁層及び/又は前記1以上の保護絶縁層を除去するステップと、 を含むことを特徴とする可撓性フィルムの製造方法。
- 21ベースウェーハ、前記ベースウェーハの上に形成された1以上の埋め込み絶縁層、前記1以上の埋め込み絶縁層の上に形成された単結晶層と、を有するSOIウェーハを用意するステップと、 前記単結晶層の上に1以上の保護絶縁層を形成するステップと、 前記ベースウェーハを所定の厚さに研磨するステップと、 研磨後に前記 SOIウェーハの周縁部を治具により保持して 前記 ベースウェーハの下面の一部 が 露出さ れ る ようにSOIウェーハを保持する ステップ と、 前 記ベースウェーハの 残留物 を湿式エッチング して除去 した後、治具により保持していた周縁部を切断するステップ と、 前記1以上の埋め込み絶縁層及び/又は前記1以上の保護絶縁層を除去するステップと、 を 含むことを特徴とす る可 撓性フィルムの製造方法。
- 22前記ベースウェーハを除去した後に、前記1以上の埋め込み絶縁層を除去するステップを更に含むことを特徴とする請求項 18ないし20 いずれか1項に記載の可撓性フィルムの製造方法。
- 23前記SOIウェーハの前記単結晶層に支持ウェーハを貼り付ける前に、前記単結晶層の上に1以上の保護絶縁層を形成するステップを更に含むことを特徴とする請求項 18ないし20 いずれか1項に記載の可撓性フィルムの製造方法。
- 24前記SOIウェーハの単結晶層に支持ウェーハを貼り付けるステップは、 前記SOIウェーハの前記単結晶層の上にワックスを塗布するステップと、 前記SOIウェーハの前記単結晶層と支持ウェーハを貼り合わせるステップと、を含むことを特徴とする請求項 18ないし20 いずれか1項に記載の可撓性フィルムの製造方法。
- 25前記SOIウェーハの前記単結晶層に支持ウェーハを貼り付けるステップは、 前記ベースウェーハを研磨する前に、保護絶縁層の上にワックスを塗布するステップと、 SOIウェーハと支持ウェーハを貼り合わせるステップと、を含み、 前記ベースウェーハ及び支持ウェーハを除去した後には、1以上の埋め込み絶縁膜及び1以上の保護絶縁層を除去するステップを更に含むことを特徴とする請求項 23 記載の可撓性フィルムの製造方法。
- 26前記ベース ウェーハ を湿式エッチングするときにKOHを用いることを特徴とする請求項 18ないし20 いずれか1項に記載の可撓性フィルムの製造方法。
- 27ベースウェーハ、前記ベースウェーハの上に形成された1以上の絶縁層、及び前記1以上の絶縁層の上に形成された単結晶層を有するSOIウェーハを用意するステップと、 前記単結晶層の上に電子素子を組み付けて1以上の素子層を形成するステップと、 前記素子層の上に素子保護膜を形成するステップと、 前記ベースウェーハを 湿式エッチングして 除去するステップと、 を含むことを特徴とする可撓性フィルムの製造方法。
- 28ベースウェーハ、前記ベースウェーハの上に形成された1以上の絶縁層、及び前記1以上の絶縁層の上に形成された単結晶層を有するSOIウェーハを用意するステップと、 前記単結晶層の上に電子素子を組み付けて1以上の素子層を形成するステップと、 前記素子層の上に素子保護膜を形成するステップと、 所 定の厚さまでベースウェーハを研磨するステップと、 湿式エッチングにより研磨後、ベースウェーハの残留物を除去するステップと、 を含むことを特徴とす る可 撓性フィルムの製造方法。
- 29ベースウェーハ、前記ベースウェーハの上に形成された1以上の絶縁層、及び前記1以上の絶縁層の上に形成された単結晶層を有するSOIウェーハを用意するステップと、 前記単結晶層の上に電子素子を組み付けて1以上の素子層を形成するステップと、 前記素子層の上に素子保護膜を形成するステップと、 前 記ベースウェーハの下面が露出されるように治具によりSOIウェーハを保持するステップと、 ベースウェーハを湿式エッチングして除去するステップと、 を含むことを特徴とす る可 撓性フィルムの製造方法。
- 30ベースウェーハ、前記ベースウェーハの上に形成された1以上の絶縁層、及び前記1以上の絶縁層の上に形成された単結晶層を有するSOIウェーハを用意するステップと、 前記単結晶層の上に電子素子を組み付けて1以上の素子層を形成するステップと、 前記素子層の上に素子保護膜を形成するステップと、 所 定の厚さにベースウェーハを研磨するステップと、 前記ベースウェーハの下面が露出されるように治具によりSOIウェーハを保持するステップと、 前記ベースウェーハを湿式エッチングして除去するステップと、 を含むことを特徴とす る可 撓性フィルムの製造方法。
- 31前記ベースウェーハを湿式エッチングするときにKOHを用いることを特徴とする請求項 27 ないし30いずれか1項に記載の可撓性フィルムの製造方法。
- 32HFを用いて湿式エッチングを行うことで1以上の絶縁層を除去するステップを更に含むことを特徴とする請求項 27ないし30 いずれか1項に記載の可撓性フィルムの製造方法。
- 33前記単結晶層の上に電子素子を組み付けて素子層を形成するステップは、半導体の製造工程を用いるステップを含むことを特徴とする請求項 27ないし30 いずれか1項に記載の可撓性フィルムの製造方法。
- 34下部プレートと、 1以上の貫通ホールを有する上部プレートと、 前記下部及び上部プレートを組み合わせるための固定手段と、を備え、 基板が前記下部プレートと前記上部プレートとの間に位置するとき、基板のエッチング処理されるべき部分が前記1以上の貫通ホールに露出されるように構成され、前記基板と1以上の貫通ホールは密封され、1以上の前記貫通ホールを介してエッチング溶液が供給されることを特徴とするエッチング用の治具。
- 35前記上部プレートには、エッチング溶液を入れるための容器を備え、前記容器は、前記1以上の貫通ホールと連通することを特徴とする請求項 34 記載のエッチング用の治具。
- 36前記容器には、ヒーターと温度計が設けられていることを特徴とする請求項 35 記載のエッチング用の治具。
Independent claims36
84 paragraphs, as filed
The present invention relates to a flexible single crystal film produced from a single crystal wafer and a method for producing the same. That is, in the present invention, a base wafer, an SOI wafer composed of one or more embedded insulating layers and a single crystal layer are thinned by various wafer thinning techniques to produce a flexible single crystal film having a desired thickness. To do.
The present invention also relates to producing a flexible film in which various electronic elements are formed from a single crystal semiconductor wafer. That is, in the present invention, after forming various electronic elements having desired characteristics on an SOI wafer composed of a base wafer, an embedded insulating layer and a single crystal layer, the wafer is thinned by various wafer thinning techniques. A flexible single crystal film having a desired thickness on which a desired electronic element is formed is produced.
At present, various electronic devices are being developed as flexible devices, not limited to the level of light weight and miniaturization. In particular, taking the display field as an example, the demand for a new concept of flexible display is increasing along with the growth of wireless Internet and electronic commerce. The present invention can be applied to flexible electronic books, electronic newspapers, etc., as well as foldable mobile phones, PDAs, etc., as specific product examples. Furthermore, the present invention is applicable to electronic blackboards, CAD / CAM displays, electronic signatures and electronic advertising boards.
However, despite the need for such flexible electronic devices, one of the biggest reasons for the delay in development is the absence of substrate materials capable of stably producing electronic devices with desired characteristics. It is a point. For example, when manufacturing a flexible LCD display, a flexible substrate capable of stably manufacturing a thin film transistor (TFT) array is required. Conventional techniques include forming amorphous silicon or polysilicon for forming elements at low temperatures on a transparent substrate made of flexible plastic, and then using a low temperature process to manufacture a TFT array, glass. There are a method of manufacturing a polysilicon TFT array on a substrate and transferring it to a flexible plastic substrate, a method of manufacturing an organic TFT using a soft organic semiconductor, and the like.
However, when an element is manufactured using a plastic substrate, or when an element is manufactured on a glass substrate and then made into a plastic substrate, the coefficient of thermal expansion is formed between an organic substrate and an inorganic electronic element. There is a problem that deformation occurs according to the difference between the two, and there is a problem that desired electronic element characteristics cannot be obtained when an organic semiconductor is used.
<p> An object of the present invention is to solve the above-mentioned conventional problems, and in particular, it is possible to easily manufacture an electronic element having desired characteristics by using a single crystal wafer and to secure flexibility. It is in the process of manufacturing flexible single crystal films.</p><p> Another object of the present invention is to stably produce a flexible film in which various desired electronic devices are formed on a single crystal layer by a simple method to realize desired device characteristics.</p><p> Yet another object of the present invention is to simplify the manufacturing process for manufacturing a flexible single crystal film to increase productivity and reduce the manufacturing cost.</p><p> The above object can be achieved by providing a flexible film with a single crystal layer made from a single crystal wafer. The flexible film may include a flexible single crystal layer made from a single crystal wafer and one or more flexible insulating layers on the lower or upper surface of the single crystal wafer.</p>
<p> The flexible single crystal film according to the present invention has a base wafer, one or more insulating layers formed on the base wafer, and one or more insulating layers by removing the base wafer using various thinning techniques. It is a pure defect-free flexible single crystal film manufactured from an SOI (silicon on insulator) wafer having a single crystal layer formed on the wafer. In the flexible single crystal film according to the present invention, for example, when manufacturing an SOI wafer by the SOI manufacturing process, the thickness of the single crystal layer is adjusted as desired in the range of several tens of nanometers to several tens of micrometers. Can be done. Further, the single crystal layer of the present invention is a silicon single crystal or a single crystal of a compound semiconductor such as gallium arsenide.</p><p> The flexible single crystal film according to the present invention includes a flexible single crystal layer manufactured from a single crystal wafer and one or more element layers formed on the surface of the single crystal layer, and the flexible single crystal layer. It manufactures various electronic elements.</p><p> The flexible single crystal film on which various electronic elements according to the present invention are formed can be manufactured by removing the base wafer of the SOI wafer. This can be achieved by manufacturing an electronic component with desired characteristics on a single crystal layer of an SOI wafer using a conventional semiconductor manufacturing process.</p><p>The method for producing the flexible film includes (i) a base wafer, one or more embedded insulating layers formed on the base wafer, and a single crystal layer formed on the one or more embedded insulating layers. A step of preparing an SOI wafer having, (ii) a step of forming one or more protective insulating layers on the single crystal layer, (iii) a step of removing the base wafer, and (iv) one or more insulation. Includes steps to remove the layer. The step of removing the base wafer includes a step of removing the entire base wafer by performing wet etching with KOH. The base wafer can be removed by polishing the base wafer to a predetermined thickness, and after polishing, the residue of the base wafer can be removed by wet etching with KOH. Moreover, the step of forming the one or more protective insulating layers on the single crystal layer includes a step of forming an oxide film on the single crystal layer and a step of forming a nitride film on the oxide film.<u style="single">Mu.</u>The step of removing one or more insulating layers includes a step of removing all the insulating film by a wet etching method using HF.<u style="single">Mu.</u></p><p> The method for producing a flexible film using the jig according to the present invention is as follows: (i) On a base wafer, one or more embedded insulating layers formed on the base wafer, and one or more embedded insulating layers. A step of preparing an SOI wafer having a formed single crystal layer, (ii) a step of holding the SOI wafer with a jig so that the lower surface of the base wafer is exposed, and (iii) etching the base wafer. Includes steps to remove. When the edge of the SOI wafer is held by a jig, the entire lower surface of the base wafer is exposed and etched. It is possible to hold the peripheral edge of the SOI wafer with a jig and etch the base wafer so that a part of the lower surface of the base wafer is exposed. The base wafer can be removed by cutting the peripheral edge portion held by the jig. The base wafer can be removed by wet etching with KOH, and one or more insulating layers can be removed by wet etching with HF.</p><p> The method for producing a flexible film by polishing using the jig according to the present invention is as follows: (i) A base wafer, one or more embedded insulating layers formed on the base wafer, and one or more embedded insulating layers. A step of preparing an SOI wafer having a single crystal layer formed above, (ii) a step of bonding the single crystal layer of the SOI wafer and a support wafer, and (iii) removing the base wafer and the support wafer. Including steps. The base wafer can be removed by polishing and etching. One or more protective insulating layers can be formed on the single crystal layer before attaching the support wafer to the single crystal layer of the SOI wafer. Further, the method for producing a flexible film by polishing using the jig according to the present invention is as follows: (i) a base wafer, one or more embedded insulating layers formed on the base wafer, and one or more embedded insulating layers. A step of preparing an SOI wafer having a single crystal layer formed on the layer, (ii) a step of polishing the base wafer to a predetermined thickness, and (iii) a residue of the base wafer after polishing. It includes a step of holding the SOI wafer with a jig so that the bottom surface is exposed, and (iv) a step of removing the residue of the base wafer by wet etching. One or more protective insulating layers can be formed on the single crystal layer before polishing the base wafer. One or more embedded insulation and / or one or more protective insulating layers can be removed after removing the base wafer.</p><p> The method for producing a flexible film for an electronic component manufactured by the present invention is as follows: (i) on a base wafer, one or more embedded insulating layers formed on the base wafer, and one or more embedded insulating layers. A step of preparing an SOI wafer having a formed single crystal layer, (ii) a step of assembling an electronic element on the single crystal layer to form one or more element layers, and (iii) an element on the element layer. It includes a step of forming a protective film and (iv) a step of removing the base wafer. The base wafer can be removed by the various methods described above.</p><p> In the present invention, commercially available SOI wafers can be used as they are, and SOI wafers can be manufactured and used by various other methods. The steps for manufacturing an SOI wafer are (i) preparing a base wafer and a bonded wafer, (ii) forming one or more embedded insulating layers on the base wafer, and (iii) injecting hydrogen ions into the bonded wafer. Steps, (iv) bonding the base wafer and the bonded wafer, (v) breaking the bonded wafer, and (vi) etching the open surface of the bonded wafer on the embedded insulating layer on the base wafer. Including the step of manufacturing an SOI wafer in which a single crystal layer is formed. The thickness of the single crystal layer can be adjusted as desired by adjusting the depth in the process of breaking the bonded wafer and adjusting the etching thickness in the process of etching the cleavage plane. See US Patent Application US10 / 391,297 for a method of manufacturing such bonded SOI wafers.</p><p> The jig used when etching the wafer includes a lower plate, an upper plate having one or more through holes, and a fixing means for combining the lower and upper plates, and the substrate is the lower plate and the upper plate. When positioned between the top plate and the substrate, the etched portion of the substrate is configured to be exposed to the one or more through holes, the substrate and the one or more through holes are sealed, and the one or more through holes are sealed. The etching solution is supplied through the holes. The upper plate is provided with a container for containing the etching solution, and the container communicates with the one or more through holes. The container is provided with a heater and a thermometer.</p>
The method for producing a flexible film from a single crystal according to the present invention will be described in detail as an example.
(Embodiment 1)
Hereinafter, the manufacturing process of the flexible single crystal film according to the present invention will be described with reference to FIGS. 1 and 2.
Silicon bare wafers are prepared as the base wafer 100 and the bonded wafer 200. As shown in Fig. 2 (a), the silicon nitride film (Si)<sub>3</sub>N<sub>4</sub>) 101 and the embedded insulating layer as the silicon oxide film 102 are formed on one side of the base wafer to a certain thickness. The silicon oxide film 102 is formed on the silicon nitride film 101. At this time, the silicon oxide film 102 can be manufactured by using a chemical vapor deposition method. As shown in FIG. 2B, impurity ions are implanted into a predetermined depth from the surface of the bonded wafer 200 to form the impurity ion implantation section 201. At this time, hydrogen ions as impurities are implanted by a low-voltage ion implantation method, and the projected flight distance (Rp) of the injected hydrogen ions is close to the surface of the bonded wafer, for example, in the range of 100 to 1000 nm. To do so.
The base wafer 100 on which the embedded insulating layer is formed as described above and the bonded wafer 200 in which hydrogen ions are injected into the surface thereof are cleaned, and the wafers 100 and 200 are separated as shown in FIG. 2 (c). to paste together. At this time, the wafers 100 and 200 are cleaned under hydrophilic conditions in order to increase the bonding strength. Wafers 100 and 200 are vertically bonded as shown in FIG. 2 (c) as soon as possible after cleaning. In vertical bonding, the base wafer 100 and the bonded wafer 200 are faced to each other, and then the wafers are gradually bonded from one end. As shown in FIG. 2 (d), two wafers are superposed to produce a single wafer.
The wafer bonded in this way is heat-treated at a low temperature, and the impurity ion implantation portion of the bonded wafer is split as shown in FIG. 2 (e). The silicon single crystal layer 202 is manufactured by treating the cleaved surface by a method such as etching and CMP (chemical mechanical polishing) to process it to a desired thickness (FIG. 2 (f)). The thickness of the silicon single crystal layer can be controlled as needed.
As shown in FIG. 2 (g), the protective insulating layers 300 and 301 are formed on the single crystal layer 202 formed on the base wafer 100. This protective insulating layer is a film for protecting the etched silicon single crystal layer when the base wafer is removed by wet etching. First, an oxide film 300 is formed, and then a nitride film 301 is formed on the oxide film 300. To do.
After forming the protective insulating layers 300 and 301 on the silicon single crystal layer, the base wafer is removed by wet etching the protective insulating layers 300 and 301 with a KOH solution. Further, the etching conditions can be controlled by adjusting the etching temperature, the concentration of the etching solution, and the like.
When the base wafer is removed in this way, as shown in FIG. 2 (h), an insulating layer remains on the upper and lower surfaces of the silicon single crystal layer, and the single crystal layer and the insulating layer become thin and flexible. It will be. Such a film<u style="single">As shown in Figure 2 (i)</u>Wet etching with an HF solution to remove both the embedded and protective insulating layers leaves only the silicon single crystal layer, producing a purely flexible single crystal film of silicon, as shown in FIG. 2J. Further, when the embedded insulating layer or the protective insulating layer formed on the silicon single crystal layer is removed by etching, a flexible film composed of the embedded or protective insulating layer and the silicon single crystal layer can be produced.
The flexible film thus produced has excellent flexibility and transparency, as shown in FIG. 3 (a), because its thickness can be adjusted from tens of micrometers to tens of nanometers. A pure silicon single crystal film 202 having properties and a flexible film 203 composed of an embedded insulating layer 102 and a silicon single crystal layer 202 as shown in FIG. 3 (b) are manufactured, which are used in various application fields. It is available. In addition, the embedded insulating layer 102 of the flexible film 203 protects the silicon single crystal layer 202 during handling.
In particular, in order to investigate the flexibility of the manufactured silicon single crystal film, the radius of curvature up to the time of fracture of the silicon single crystal was calculated. That is, as shown in FIG. 4A, when a silicon wafer having a thickness d is bent at the radius of curvature R, the stress applied at this time can be expressed by the following equation.
σ = (d / 2R) E (<σ<sub>y</sub>And <σ<sub>f</sub>)
Where σ is stress, d is thickness, R is radius of curvature, E is elastic modulus, σ<sub>y</sub>Is the yield stress, σ<sub>f</sub>Indicates the fracture stress.
Normally E is 190 GPa and σ<sub>y</sub>Is 6.9 GPa and σ<sub>f</sub>Is 2.8 GPa. When the thickness of the silicon single crystal film was 5 μm, the theoretical radius of curvature at the fracture site was 0.17 mm. The silicon single crystal flexible film having a thickness of 5 μm according to the present invention could be bent without breaking up to a radius of curvature of at least 3 mm (Fig. 4 (b)). Therefore, it can be seen that the silicon single crystal flexible film according to the present invention has sufficient softness as desired. Similarly, the same can be said for the flexible single crystal film according to the embodiment of the present invention.
(Embodiment 2)
Hereinafter, the manufacturing process of the flexible single crystal film by polishing according to the present invention will be described with reference to FIGS. 5 and 6.
As shown in FIG. 6A, an SOI wafer having a base wafer 600, an embedded insulating layer 601 formed on the base wafer 600, and a silicon single crystal layer 602 formed on the embedded insulating layer 601 is prepared. .. This SOI wafer can be manufactured as a SIMOX (separation by silicon oxygen) wafer or a bonded SOI wafer, and a commercially available wafer can also be used. Use a thick insulating layer. The thickness of the single crystal layer is adjusted according to the field of application.
A protective insulating layer as an oxide film 603 and a nitride film 604 is formed on the SOI wafer thus prepared, which protects the silicon single crystal layer when the base wafer is removed. First, an oxide film 603 is formed.<u style="single">(Fig. 6 (b))</u>, A nitride film 604 is formed on the oxide film 603 (Fig. 6 (c)).
After applying the wax 605 as an adhesive on the protective insulating layer thus formed (FIG. 6 (d)), the support wafer 606 is attached onto the wax 605 (FIG. 6 (e)). At this time, as the wax, a water-soluble wax that is well soluble in water can be selected. The support wafers are attached by vertical or horizontal bonding. The support wafer 606 is for protecting the SOI wafer during the subsequent polishing process and facilitating the process. That is, when polishing an SOI wafer, there is a problem that the wafer becomes thin while being polished and the wafer cracks in the polishing chuck. However, when the SOI wafer is polished after the support wafer is attached, the SOI wafer becomes thin. The wafer can be safely held in the chuck without cracking even when polished.
With the support wafer 606 attached in this way, the base wafer 600 is polished to a predetermined thickness as shown in FIG. 6 (f). At this time, the polishing thickness can be freely adjusted to, for example, 50 μm to 200 μm. The support wafer 606 may not be used when the base wafer remaining after polishing is thick.
After polishing the base wafer 600, the support wafer 606 is removed by melting the wax with an aqueous solution or a chemical (Fig. 6 (g)).
After removing the support wafer 606 in this way, wet etching with a KOH solution is performed on the support wafer 606 to remove the residue 600a of the base wafer that remains after polishing (FIG. 6 (h)).
As shown in FIG. 6 (h), when the base wafer is removed in this way, insulating layers 604, 603, and 601 remain on the upper and lower surfaces of the silicon single crystal layer 602, and in this state, the single crystal layer and the insulating layer remain. The thickness of the wafer is sufficiently thin to ensure some flexibility. By wet etching this film with an HF solution to remove all the insulating layers formed on the upper and lower silicon single crystal layers, a pure flexible single crystal as shown in FIG. 6 (i). The film is secured. Further, when the embedded insulating layer or the protective insulating layer of the silicon single crystal layer is removed by etching, a flexible film composed of the insulating layer and the silicon single crystal layer is secured.
When a flexible film is produced according to the present invention, the etching time can be significantly shortened. Since the base wafer is polished to a predetermined thickness, the etching flatness is good. Further, the thinning technique according to the present invention makes it possible to easily produce a flexible single crystal film from a commercially available SOI wafer.
(Embodiment 3)
Hereinafter, the manufacturing process of the flexible single crystal film using the jig according to the present invention will be described with reference to FIGS. 8 and 9.
First, the jig used in the present invention will be described. As shown in FIG. 7, the jig is composed of an upper plate 701 and a lower plate 700, and a wafer 706 is provided between the upper plate and the lower plate. Each of these plates 700, 701 is manufactured from a chemically stable substance, such as the registered trademark Teflon. The upper plate 701 provides a container 702 containing a chemical solution when the upper plate and the lower plate are combined. The bottom surface of the container 702 is provided with a through hole communicating with the portion of the wafer exposed by etching. Wafers and through holes are sealed. The through hole of the container 702 is manufactured in various shapes such as a tube or a square cylinder or a cylinder. A fixture 703 is provided to secure the top and bottom plates.
By using such a jig, only one side of the wafer can be wet-etched and removed. That is, the wafer 706 is placed on the lower plate 700 so that the wafer surface to be removed by etching faces the upper plate 701. After combining the upper plate and the lower plate, the etching solution is supplied to the container 702 to remove the surface of the wafer. At this time, a heater 704 coated with the registered trademark Teflon and a thermometer 705 are provided in the container according to the etching conditions, and the etching temperature is adjusted.
Hereinafter, the process of etching one entire surface of the base wafer using a jig will be described with reference to FIG.
<u style="single">As shown in Figure 8 (a)</u>An SOI wafer having a base wafer 800, an insulating layer 801 formed on the base wafer 800, and a silicon single crystal layer 802 formed on the insulating layer is prepared so that the surface to be etched is on the top. As shown in FIG. 8 (b), the SOI wafer edge is held by a jig so that the entire surface of the base wafer removed by etching is exposed in the container of the upper plate.
As shown in FIG. 8 (c), the KOH solution 900 is supplied to the exposed surface of the base wafer removed by etching. After discharging the KOH solution 900, the HF solution 901 is supplied to the exposed surface and the insulating layer 801 is etched to produce a pure silicon single crystal flexible film (FIG. 8 (e)). At this time, the insulating layer can be removed by the HF solution by supporting the entire SOI wafer in the HF solution without holding it by a jig.
Further, after performing only KOH etching in the above step, a flexible film composed of an insulating layer and a silicon single crystal layer can be produced.
Hereinafter, the process of etching and removing a part of the base wafer using a jig will be described in detail with reference to FIG.
As shown in FIG. 9A, an SOI wafer having a base wafer 800, an insulating layer 801 formed on the base wafer 800, and a silicon single crystal layer 802 formed on the insulating layer is prepared. The peripheral edge of the back surface of the SOI wafer is pressed with a jig so that a part of the surface removed by etching is exposed (Fig. 9 (b)).
As shown in FIG. 9 (c), a KOH solution is supplied to the exposed surface of the base wafer, and the base wafer is etched and removed. After discharging the KOH solution, the HF solution is supplied to the exposed surface to etch and remove the insulating layer (Fig. 9 (d) -1). That is, the exposed surface of the base wafer is removed by etching, and the insulating layer serves as an etching protective layer. At this time, the insulating layer can be removed by the HF solution by supporting the entire SOI wafer in the HF solution without holding it with a jig (Fig. 9 (d) -2).
In this way, the peripheral edge of the base wafer that remains unremoved by etching is cut to produce a pure silicon single crystal flexible film (Fig. 9 (e)).
Further, in the above step, by cutting the peripheral portion of the base wafer after performing only KOH etching, a flexible film composed of an insulating layer and a silicon single crystal layer can be produced.
The flexible single crystal film can be easily manufactured by removing only one side of the wafer by etching using the jig. That is, since the base wafer is etched using a jig without a separate process, the man-hours can be reduced. Further, the peripheral portion of the unnecessary wafer can be easily removed. The shape of the container on the upper plate can be changed to produce a flexible film having a desired shape. That is, when the peripheral edge of the circular wafer is held and etched by using a jig having a square tubular container and then the peripheral edge is cut, a quadrangular flexible single crystal film can be obtained.
(Embodiment 4)
Hereinafter, the process of manufacturing a flexible single crystal film using polishing and a jig according to the present invention will be described with reference to FIGS. 10 to 13.
As shown in FIG. 11A, an SOI wafer 1007 having a base wafer 1000, an embedded insulating layer 1001 formed on the base wafer 1000, and a silicon single crystal layer 1002 formed on the embedded insulating layer 1001 is prepared. To do. The thickness of the single crystal layer is adjusted according to the field of application.
After applying wax 1005 on the SOI wafer prepared in this way (<u style="single">Figure 11 (b)</u>), And the support wafer 1006 is attached on it (Fig. 11 (c)). At this time, as the wax, a water-soluble wax that is well soluble in water can be selected. The support wafer 1006 is attached by vertical or horizontal bonding. The support wafer 1006 is for protecting the SOI wafer during the subsequent polishing process and facilitating the process. That is, the protective insulating layer can be formed on the above-mentioned SOI wafer.
As shown in FIG. 11 (d), the base wafer 1000 is polished to a predetermined thickness in a state where the support wafer 1006 is attached. At this time, the polishing thickness can be freely adjusted to, for example, 50 μm to 200 μm.
After polishing the base wafer 1000, as shown in FIGS. 12 and 13, the residue 1000b of the base wafer can be removed by wet etching using the jig shown in FIG. Before and after removing the residue 1000b of the base wafer, the support wafer 1006 is removed by melting the wax with an aqueous solution or a chemical.
Hereinafter, the removal step of etching the entire surface of the base wafer using a jig will be described with reference to FIG.
As shown in FIG. 12 (a), the peripheral edge of the SOI wafer is held by a jig so that the entire surface of the base wafer residue 1000b removed by etching is exposed in the container 702 of the upper plate 701.
As shown in FIG. 12 (b), KOH solution 900 is supplied to the exposed surface of the residue 1000b of the base wafer in order to etch and remove the base wafer. After discharging the KOH solution 900, the HF solution 901 is supplied to the exposed surface to etch and remove the insulating layer 1001 (FIG. 12 (c)). After draining the HF solution 901, the wax 1005 and the support wafer 1006 are removed to produce a pure silicon single crystal flexible film (FIGS. 12 (d), 12 (e)). The support wafer 1006 can be removed before removing the base wafer residue 1000b.
In the above step, after performing only KOH etching, a flexible film composed of an insulating layer and a silicon single crystal layer can be produced.
Hereinafter, with reference to FIG. 13, a step of etching and removing a part of the base wafer using a jig will be described in detail. When the flexible film is produced according to the present invention, it is not necessary to wet-etch the peripheral portion of the wafer. That is, the required portion of the wafer is etched using a jig that changes the shape of the through hole of the container according to the desired shape, and the unnecessary peripheral portion of the unetched wafer is cut to form a flexible film having the desired shape. Can be manufactured. At this time, the wax 1005 and the support wafer 1006 can be removed before the etching process in order to avoid the cutting process of the support wafer 1006. Alternatively, the support wafer 1006 can be removed after the etching step and before cutting the unwanted peripheral edges of the wafer.
As described above, after polishing the base wafer 1000 to a predetermined thickness, the support wafer 1006 is removed by melting the wax with an aqueous solution or a chemical. After removing the support wafer 1006, the peripheral edge of the wafer is pressed with a jig so that a part of the base wafer removed by etching is exposed (Fig. 13 (a)).
KOH solution 900 is supplied to the exposed surface of the base wafer residue 1000b to etch and remove the base wafer as shown in FIG. 13 (b). After discharging the KOH solution, the HF solution 901 is supplied to the exposed surface to etch and remove the insulating layer (Fig. 13 (c)).<u style="single">If the HF solution 901 is discharged,</u>Because the peripheral edge 1000c of the base wafer is not removed by etching<u style="single">(Fig. 13 (d))</u>, Cut this off<u style="single">(Fig. 13 (e))</u>A pure silicon single crystal flexible film is obtained (Fig. 13 (f)).
Further, in the above step, after only KOH etching is performed, the peripheral portion 1000c of the base wafer can be cut to obtain a flexible film composed of an insulating layer and a silicon single crystal layer.
(Embodiment 5)
Hereinafter, still another embodiment of the manufacturing process of the flexible single crystal film according to the present invention will be described in detail with reference to FIGS. 14 to 16. This embodiment is almost the same as that of the fourth embodiment except that the support wafer is not attached to the SOI wafer.
As shown in FIG. 15 (a), an SOI wafer having a base wafer 1200, an embedded insulating layer 1201 formed on the base wafer 1200, and a silicon single crystal layer 1202 formed on the embedded insulating layer 1201 is prepared. To do. The thickness of the single crystal layer is adjusted according to the field of application.
The protective insulating layer is formed on the SOI wafer described above. The protective insulating layer protects the silicon single crystal layer from etching when the base wafer is removed by wet etching. This protective insulating layer includes an oxide film 1203 (FIG. 15 (b)) and a nitride film 1204 (FIG. 15 (c)) formed on the oxide film 1203.
After forming the protective insulating layer on the SOI wafer, the base wafer 1200 is polished to the desired thickness (Fig. 15 (d)). In this embodiment, since the support wafer is not attached to the SOI wafer, the SOI wafer may crack in the polishing chuck during polishing. Therefore, after polishing, the residue on the base wafer is thickened. That is, the thickness at the time of polishing can be adjusted to a desired thickness of 150 μm or more.
As shown in FIG. 16, after polishing the base wafer 1200, the residue 1200b of the base wafer can be removed by wet etching using the jig shown in FIG. 7.
FIG. 16 shows a process of etching and removing a part of the base wafer using a jig. When a flexible film is produced according to the present invention, it is not necessary to wet-etch the peripheral portion of the wafer. That is, the required portion of the wafer is etched using a jig that changes the shape of the through hole of the container according to the desired shape, and the unnecessary peripheral portion of the unetched wafer is cut to form a flexible film having the desired shape. Can be manufactured.
Figure 15 (<u style="single">d</u>), After polishing the base wafer 1200 to a predetermined thickness, the peripheral edge of the wafer is pressed with a jig so that a part of the base wafer removed by etching is exposed (FIG. 16 (a)). )).
As shown in FIG. 16 (b), KOH solution 900 is supplied to the exposed surface of the base wafer in order to etch and remove the base wafer. After discharging the KOH solution 900, the HF solution is supplied to the exposed surface to etch and remove the insulating layer 1201 (FIGS. 16 (c) and 16 (d)). Further, in the above step, after performing only KOH etching, a flexible film composed of an insulating layer and a silicon single crystal layer can be obtained.
After removing the insulating layer 1201, the peripheral edge of the wafer that is not removed by etching is cut to obtain a wafer composed of a silicon single crystal layer and a protective insulating layer (FIG. 16 (e)). In order to remove the protective insulating layers 1203 and 1204, the wafer is turned over and held by a jig so that the entire surface of the protective insulating layer 1204 is exposed. Then, the protective insulating layers 1203 and 1204 are etched with the HF solution 901.<u style="single">(Fig. 16 (f))</u>Obtain a silicon single crystal flexible film<u style="single">(Fig. 16 (g))</u>。
The removal of the embedded insulating layer 1201 and the protective insulating layers 1203 and 1204 with the HF solution can also be performed by supporting the entire wafer in the HF solution without holding by a jig.
In this embodiment, a method of removing the residue of the base wafer after holding the peripheral portion of the wafer with a jig and polishing it has been described, but a part of the base wafer is etched to cut the peripheral portion. After polishing, the edge of the wafer is held by a jig to expose the entire surface of the residue of the base wafer, and then etching can be performed using KOH.
(Embodiment 6)
The manufacturing process of the flexible single crystal film according to the present invention will be described in detail with reference to FIGS. 17 and 18.
As shown in FIG. 17A, an SOI wafer 1406 having a base wafer 1400, an insulating layer 1401 formed on the base wafer, and a silicon single crystal layer 1402 formed on the insulating layer is prepared.
Various electronic elements are manufactured on the single crystal layer of this SOI wafer by using a normal semiconductor manufacturing process (Fig. 17 (b)). Such an electronic element 1404 can be manufactured as desired depending on the intended purpose. That is, this type of electronic element is designed according to desired characteristics of various transistors, TFT arrays, logic circuits, etc., and can be manufactured by a semiconductor manufacturing process.
A protective film 1405 for protecting the device is formed on the device layer on which various devices are manufactured (Fig. 17 (c)). As the protective film 1405, a normal passivation film, an organic insulating layer, or the like can be used.
The base wafer 1400 is removed from the SOI wafer from which the device was manufactured to produce a flexible film (Fig. 17 (d)). At this time, the removal of the base wafer can be performed in the same manner as the method of the first to fifth embodiments.
As shown in FIG. 18, the flexible film thus produced is sufficiently flexible with only the desired electronic component produced on the silicon single crystal. FIG. 18 (a) shows a flexible film in which the device is manufactured on a pure silicon single crystal layer, and FIG. 18 (b) shows a flexible film composed of an insulating layer and a silicon single crystal layer. The state in which the device is manufactured is shown in the above, and the insulating layer protects the silicon single crystal layer and the device during handling.
As described above, the flexible single crystal film of the present invention can easily produce an element having desired properties manufactured on a silicon single crystal, and allows overall flexibility. In particular, a flexible single crystal film can be easily produced using a single crystal wafer.
According to the present invention, a flexible film in which various desired electronic elements are manufactured on a single crystal layer is stably manufactured by a simple method. The present invention can embody the desired properties of an electronic device. That is, since various electronic devices are manufactured on the single crystal layer, an active layer for the device is formed from the single crystal layer. 1000 cm due to the use of semiconductor manufacturing process<sup>2</sup>An extremely high electron transfer value of / Vsec can be obtained. In this way, excellent electronic element characteristics can be obtained, and leakage current can be significantly reduced. In addition, it is possible to reduce the size of various electronic elements to the level of ordinary semiconductor elements. Since the semiconductor manufacturing process through a silicon wafer is applied, the circuit can be constructed according to the design rules up to 30 nm in the current semiconductor process by semiconductor photolithography and etching process that can achieve both stable high temperature process and excellent alignment accuracy. It is possible to design.
Since the present invention can use a stable single crystal channel element, it has a specific application such as an SOP (system on panel) in which all drive circuits are integrated and other memories, system ICs, processors, and the like. The semiconductor circuit of the above can be integrated, and the above-mentioned element can be realized in a flexible film.
Flexible single crystal film can be manufactured using appropriate thinning technology, and by simplifying the manufacturing process for manufacturing flexible single crystal film, productivity can be increased and manufacturing cost can be reduced. Can be done.
The present invention has been described in detail above through specific embodiments, but the present invention is not limited thereto, and a person who has ordinary knowledge in the art within the technical idea of the present invention. It is possible to transform and improve it.
<figref num="1">FIG. 1 is a manufacturing procedure diagram of a flexible film manufactured according to the first embodiment of the present invention.</figref><figref num="2">FIG. 2 is a manufacturing process diagram of a flexible film manufactured according to the first embodiment of the present invention.</figref><figref num="3">FIG. 3 shows a flexible film produced according to the first embodiment of the present invention.</figref><figref num="4">FIG. 4 is a conceptual diagram for measuring the flexibility of the flexible film produced according to the present invention.</figref><figref num="5">FIG. 5 is a manufacturing procedure diagram of the flexible film manufactured according to the second embodiment of the present invention.</figref><figref num="6">FIG. 6 is a manufacturing process diagram of the flexible film manufactured according to the second embodiment of the present invention.</figref><figref num="7">FIG. 7 is a structural diagram of the jig used in the present invention.</figref><figref num="8">FIG. 8 is a manufacturing process diagram of a flexible film by etching the entire surface of the base wafer according to the third embodiment of the present invention.</figref><figref num="9">FIG. 9 is a manufacturing process diagram of a flexible film by partially etching the base wafer according to the third embodiment of the present invention.</figref><figref num="10">FIG. 10 is a manufacturing procedure diagram of a flexible film manufactured according to the fourth embodiment of the present invention.</figref><figref num="11">FIG. 11 is a manufacturing process diagram of the flexible film manufactured according to the fourth embodiment of the present invention.</figref><figref num="12">FIG. 12 is a manufacturing process diagram of the flexible film manufactured according to the fourth embodiment of the present invention.</figref><figref num="13">FIG. 13 is a manufacturing process diagram of the flexible film manufactured according to the fourth embodiment of the present invention.</figref><figref num="14">FIG. 14 is a manufacturing procedure diagram of the flexible film manufactured according to the fifth embodiment of the present invention.</figref><figref num="15">FIG. 15 is a manufacturing process diagram of the flexible film manufactured according to the fifth embodiment of the present invention.</figref><figref num="16">FIG. 16 is a manufacturing process diagram of the flexible film manufactured according to the fifth embodiment of the present invention.</figref><figref num="17">FIG. 17 is a manufacturing process diagram of the flexible film manufactured according to the sixth embodiment of the present invention.</figref><figref num="18">FIG. 18 is a flexible film produced according to the sixth embodiment of the present invention.</figref>
18 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 Sheet 18
Every citation, both ways
| Document | Relation | Office |
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| JP2000349266A | Cites | Japan |
| WO2003065473A1 | Cites | World Intellectual Property Organization (WIPO) |
25 members in 6 offices
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 10833050 | United States of America | – | |
| 83305004 | United States of America | A | |
| 2004002286 | Republic of Korea | W |
Members25
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| US2004217423A1 | United States of America | A1 | |
| US2004218133A1 | United States of America | A1 | |
| KR20040093948A | Republic of Korea | A | |
| KR20040093949A | Republic of Korea | A | |
| KR20040100469A | Republic of Korea | A | |
| WO2005106933A1 | World Intellectual Property Organization (WIPO) | A1 | |
| WO2005106934A1 | World Intellectual Property Organization (WIPO) | A1 | |
| KR100547237B1 | Republic of Korea | B1 | |
| KR100569202B1 | Republic of Korea | B1 | |
| KR100583429B1 | Republic of Korea | B1 | |
| EP1751788A1 | European Patent Office (EPO) | A1 | |
| EP1751789A1 | European Patent Office (EPO) | A1 | |
| CN1957445A | China | A | |
| CN101027753A | China | A | |
| JP2007534996A | Japan | A | |
| JP2007535809A | Japan | A | |
| EP1751789A4 | European Patent Office (EPO) | A4 | |
| CN100481327C | China | C | |
| CN100481328C | China | C | |
| US7592239B2 | United States of America | B2 | |
| EP1751788A4 | European Patent Office (EPO) | A4 | |
| JP4814873B2 | Japan | B2 | |
| JP4959552B2This record | Japan | B2 | |
| EP1751789B1 | European Patent Office (EPO) | B1 | |
| EP1751788B1 | European Patent Office (EPO) | B1 |
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Over the term
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| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
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| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Renewal fee payment (event date is renewal date of database)FPAY | FPAY | |
| Certificate of patent or registration of utility modelJAPANESE INTERMEDIATE CODE: R150R150 | R150 | |
| Certificate of patent or registration of utility modelJAPANESE INTERMEDIATE CODE: R150R150 | R150 | |
| First payment of annual fees (during grant procedure)JAPANESE INTERMEDIATE CODE: A61A61 | A61 | |
| Written decision to grant a patent or to grant a registration (utility model)JAPANESE INTERMEDIATE CODE: A01A01 | A01 | |
| Written decision to grant a patent or to grant a registration (utility model)JAPANESE INTERMEDIATE CODE: A01A01 | A01 | |
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| Written amendmentJAPANESE INTERMEDIATE CODE: A523A521 | A521 |
Numbers
- Publication
- 4959552
- Application
- 2007510601
Titles2
- Japanese
- 可撓性単結晶フィルム及びその製造方法
- English
- Flexible single crystal film and its manufacturing method
Classification
- CPC, 8
- C30B29/06
- H10D86/201
- H10D86/40
- H10D86/60
- H10D30/0323
- H10D30/6758
- H10P90/1922
- H10W10/181
- IPC, 8
- H01L21 02
- C30B29 06
- H01L21 20
- H01L21 336
- H01L21 762
- H01L21 77
- H01L21 84
- H01L29 786
