Method for production of pieces for passive electronic components
Abstract
"PARTS MANUFACTURING PROCESS FOR PASSIVE ELECTRONIC COMPONENTS, PARTS, PLATE, MANUFACTURING PROCESSES FOR A PASSIVE ELECTRONIC COMPONENT AND A PRINTED CIRCUIT". Process of manufacturing parts for passive electronic components according to which: - a stratified strip (1) is made up of at least a stack of a thin metallic strip and a layer of an adhesive material, and is cut on the stratified strip ( 1) at least one piece (6), and the cutting is carried out by a process that includes at least one sandblast engraving step. Parts obtained.
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23 claims: 3 independent, 20 dependent
- 1Reivindicações 1. PROCESSO DE FABRICAÇÃO DE PEÇAS PARA COMPONENTES ELETRÔNICOS PASSIVOS, segundo o qual:- fabrica-se uma tira estratificada (1, 10, 13, 100) constituída por pelo menos um empilhamento de uma tira metálica fina e frágil (2, 21, 210) e de uma camada de um material adesivo, - e recorta-se na tira estratificada (1, 10, 13, 100) pelo menos uma peça (6, 6’, 16A, 16B, 16C, 16D;54;100), - caracterizado pelo fato do recorte ser efetuado por um processo que comporta pelo menos uma etapa de gravação por jateamento.
- 2PROCESSO, de acordo com a reivindicação 1 caracterizado pelo fato da camada de um material adesivo do pelo menos um empilhamento ser uma camada (3, 31, 310) de um material adesivo duro e frágil.
- 3PROCESSO, de acordo com a reivindicação 1 ou a reivindicação 2, caracterizado pelo fato da tira metálica fina e frágil do pelo menos um empilhamento de tiras metálicas finas e frágeis e de uma camada de um material adesivo ser constituída por um material escolhido entre as seguintes ligas:ligas magnéticas nanocristalinas, ligas magnéticas ferrocobalto frágeis, ferro-platina frágeis, ferro-silício frágeis, ferro-níquel frágeis, ligas níquel-cromo frágeis, ligas de molibdênio frágeis e ligas de tungstênio frágeis.
- 4PROCESSO, de acordo com qualquer uma das reivindicações 1 a 3, caracterizado pelo fato de para efetuar pelo menos uma etapa de gravação por jateamento, dispõe-se sobre uma face da tira estratificada (1, 10, 13, 100) uma chapa (4, 14, 40, 400) de um material resistente ao jateamento, que comporta pelo menos uma abertura (7, 17, 70, 700) que possui pelo menos uma forma segundo a qual se quer gravar pelo menos uma tira estratificada.
- 5PROCESSO, de acordo com a reivindicação 4 caracterizado pelo fato da chapa (4, 14, 40, 400) ser uma tira de aço resistente à gravação por jateamento de areia. 5 6. PROCESSO, de acordo com a reivindicação 4 caracterizado pelo fato pelo fato da chapa (4, 14, 40, 400) ser constituída por uma camada elástica. caracterizado pelo fato da camada elástica ser uma camada de resina fotossensível elástica que é exposta a uma radiação luminosa através de uma máscara que comporta recortes apropriados e que é revelada por imersão em 15 uma banho antes da gravação por jateamento de areia.
- 69. PROCESSO, de acordo com qualquer uma das reivindicações 1 a 8, caracterizado pelo fato da tira estratificada (10, 100) ser constituída por pelo menos dois empilhamentos alternados (11, 12, 110, 120) de tiras metálicas finas e de camadas de um material adesivo duro e frágil, 20 sendo que os pelo menos dois empilhamentos alternados são superpostos e separados por uma camada aderente (33, 330) na qual pelo menos uma parte é constituída por um material elástico resistente à gravação por jateamento de areia.
- 710. PROCESSO, de acordo com qualquer uma das 25 reivindicações 1 a 9, caracterizado pelo fato pelo fato de, para efetuar a gravação por jateamento de areia, se colar a tira estratificada (1, 10, 13, 100) sobre uma tira ou uma placa de suporte (5, 15, 50, 51, 100).
- 811. PROCESSO, de acordo com a reivindicação 10 caracterizado pelo fato de, após recorte por jateamento de areia, a tira estratificada recortada (13) ser separada da tira de suporte (15).
- 912. PROCESSO, de acordo com a reivindicação 10 ou 11 caracterizado pelo fato de para se efetuar a gravação por jateamento de areia a tira estratificada é colocada sobre a tira de suporte é colocada sobre a tira de suporte, em um recinto de gravação por jateamento de areia que compreende pelo menos um bico de jateamento que projeta um jato de partículas abrasivas, e faz-se com que seja efetuado um movimento relativo da tira estratificada e do pelo menos um bico de jateamento a fim de efetuar uma varredura da superfície da tira estratificada pelo jato de partículas abrasivas.
- 1013. PROCESSO, de acordo com qualquer uma das reivindicações 1 a 12, caracterizado pelo fato de se gravar sobre a tira estratificada (13, 13’) uma pluralidade de peças (16A, 16B, 16C e 16D) para componentes eletrônicos ligadas entre si por pontos de fixação (19A, 19B, 19C e 19D) e pelo fato de, depois da gravação, as diferentes peças serem separadas.
- 1114. PROCESSO, de acordo com qualquer uma das reivindicações 1 a 13, caracterizado pelo fato do material duro e frágil ser uma cola epóxi.
- 1215. PROCESSO, de acordo com a reivindicação 10 caracterizado pelo fato da tira suporte ser uma tira que comporta uma camada de polímero (52) e uma camada (53) de material condutor tal como o cobre.
- 1316. PROCESSO, de acordo com a reivindicação 15 caracterizado pelo fato da tira suporte (51) compreender ainda, antes do recorte por jateamento de areia, pelo menos um componente eletrônico que é protegido no momento do recorte por jateamento de areia com uma camada de material elástico.
- 1417. PEÇA, suscetível de ser obtida pelo processo de acordo com qualquer uma das reivindicações 1 a 14, caracterizada pelo fato de ser um núcleo de composto eletrônico indutivo passivo.
- 1518. PEÇA, de acordo com a reivindicação 17, caracterizada pelo fato de comportar um entreferro. 5
- 1619. PEÇA, de acordo com a reivindicação 17 ou 18, caracterizada pelo fato de ser um toro com uma espessura inferior a 1 mm.
- 1720. PEÇA, de acordo com a reivindicação 17 ou 18, caracterizada pelo fato de comportar pelo menos duas partes de espessuras diferentes. 10
- 1821. PEÇA, suscetível de ser obtida pelo processo de acordo com qualquer uma das reivindicações 1 a 14, caracterizada pelo fato de ser uma armadura para uma capacidade elétrica.
- 1922. PEÇA, suscetível de ser obtida pelo processo de acordo com qualquer uma das reivindicações 1 a 14, caracterizada pelo fato de 15 constituir uma resistência elétrica.
- 2023. PLACA, destinada a ser incorporada a um circuito impresso, constituído por uma camada (53) de um material condutor e por uma camada de material polimérico elástico (52) sobre a qual é colada uma peça (54) de componente eletrônico passivo recortado em uma tira estratificada, que 20 compreende eventualmente pelo menos um componente eletrônico adicional, suscetível de ser obtido pelo processo de acordo com a reivindicação 15 ou a reivindicação 16.
- 2124. PROCESSO DE FABRICAÇÃO DE UM COMPONENTE ELETRÔNICO PASSIVO, indutivo do tipo que compreende uma peça recortada
- 2225 em uma tira estratificada constituída de um empilhamento de tiras metálicas finas de uma liga magnética, caracterizada pelo fato de se fabricar a referida peça pelo processo de acordo com qualquer uma das reivindicações 1 a 14, e de se realizar pelo menos uma bobinagem e o revestimento do componente com um material de proteção. 25. PROCESSO DE FABRICAÇÃO DE UM COMPONENTE ELETRÔNICO PASSIVO, capacitivo ou resistivo, que compreende uma peça recortada em uma tira estratificada constituída por pelo menos um 5 empilhamento de tiras metálicas finas e meios de conexão elétrica, caracterizado pelo fato de se fabricar a referida peça pelo processo de acordo com qualquer uma das reivindicações 1 a 14, e de se realizar os meios de conexão e o revestimento do composto com um material de proteção.
- 2326. PROCESSO DE FABRICAÇÃO DE UM CIRCUITO 10 IMPRESSO, que compreende pelo menos um componente eletrônico passivo que comporta uma peça constituída por um material metálico estratificado caracterizado pelo dato de empilhar e de se fazer aderir por colagem pelo menos uma placa de acordo com a reivindicação 23 e pelo menos uma placa que comporta uma camada de material polimérico. 1/6 o v • * J J J z * o J · , i J J « « „ • · · J · · 3 9
Independent claims23
81 paragraphs in 2 sections, as filed
(54) Title: PARTS MANUFACTURING PROCESS FOR PASSIVE ELECTRONIC COMPONENTS, PARTS, PLATE, MANUFACTURING PROCESSES FOR A PASSIVE ELECTRONIC COMPONENT AND A PRINTED CIRCUIT (30) Unionist Priority: 06/23/2003 fr 0307563 (71) Depositor ( s): Imphy Alloys (FR) (72) Inventor (s): Martin Gijs, Jean-Pierre Reyal, Farid Amalou (74) Attorney: Alexandre Fukuda Yamashita (86) International Request: pct FR2004 / 001556 of 22/06/2004 (87) International publication: wo 2005/002308 de 06/01/2005 (57) Abstract: PARTS MANUFACTURING PROCESS FOR PASSIVE ELECTRONIC COMPONENTS, PARTS, PLATE, MANUFACTURING PROCESSES FOR A PASSIVE ELECTRONIC COMPONENT AND A PRINTED CIRCUIT. Parts manufacturing process for passive electronic components according to which: - a stratified strip (1) is made up of at least one stack of a thin metallic strip and a layer of an adhesive material, and is cut on the stratified strip (1) at least one piece (6), and the cutting is carried out by a process that includes at least one sandblast engraving step. Parts obtained.
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Ο ύ “PARTS MANUFACTURING PROCESS FOR PASSIVE ELECTRONIC COMPONENTS, PARTS, PLATE, PROCESSING PROCESSES
MANUFACTURE OF A PASSIVE ELECTRONIC COMPONENT AND A PRINTED CIRCUIT ”
The present invention deals with a process of manufacturing parts for passive electronic components obtained by cutting a stratified strip consisting of a stack of thin and fragile metal strips, and in particular thin metal strips of nanocrystalline alloy.
Nanocrystalline alloys and in particular Fe Cu Nb B Si or Fe Zr B Si or other types of nanocrystalline alloys are well known. Those alloys that have excellent magnetic properties are obtained by heat treatment of amorphous alloy strips obtained by ultrafast solidification of a liquid metal. These strips, particularly suitable for the manufacture of a magnetic core with very high permeability, in particular low frequency, however, have the drawback of being extremely fragile. Thus, to manufacture magnetic cores with these nanocrystalline alloy strips, it was proposed to roll amorphous alloys to form coils, and to perform heat treatments on these coils to give the alloy a nanocrystalline structure. Magnetic cores are thus obtained which have excellent magnetic properties, but which have the drawback of having only one possible shape, which is that of a coil.
In order to manufacture nanocrystalline alloy magnetic cores with different coil shapes, it was proposed to make stratified strips consisting of a stack of nanocrystalline alloy strips glued together by a glue or a resin, and to cut these stratified strips by mechanical means such such as shear or laser, in order to obtain cores with the desired shape. But this technique presents a drawback, because due to the extreme fragility of the nanocrystalline alloy strips, the mechanical or laser cutout can generate cracks inside the nanocrystalline strips that considerably deteriorate the magnetic properties of the obtained cores.
In order to be able to handle the extremely fragile nanocrystalline tapes 5 more easily, it has been proposed in particular in the patent FR 2 788 455, a method for joining the nanocrystalline tapes with polymeric strips, which makes it easier to manipulate them. These nanocrystalline tapes associated with polymeric tapes can then be stacked and engraved to make magnetic cores usable for making magnetic components buried in printed circuits or for making discrete nanocrystalline magnetic components. This process that uses chemical engraving has the advantage of being well known. The manufacturing technique is, however, slow and complex. In fact, due to the presence of strips of polymeric materials on which nanocrystalline strips are glued, it is necessary to engrave each strip before stacking the different strips to obtain a component that has the desired dimensions.
The purpose of the present invention is to correct these drawbacks by proposing a means to manufacture parts for passive electronic components, in particular magnetic electronic components, consisting of a stack of thin and fragile magnetic strips, and in particular nanocrystalline alloy strips, which have very different shapes. diverse.
To this end, the present invention relates to a process for manufacturing parts for passive electronic components, with which a stratified strip is made up of at least one stack of a thin and fragile metallic strip and a layer of an adhesive material, and at least one piece is cut on the stratified strip by a process comprising at least one sandblasting step. In this process, well adapted to fragile and brittle materials, the inconveniences of nanocrystalline materials, that is, their fragility and the maintenance problems resulting from this, become an advantage.
Preferably, the layer of an adhesive material of the at least one stack is a layer of a hard and brittle material.
To carry out at least one sandblasting step, a sheet of sandblast-resistant material is arranged on one side of the stratified strip, which has openings that have at least one shape with which one wishes to engrave at least a stratified strip.
The sheet may be, for example, a steel strip resistant to sandblasting, or an elastic layer such as a layer of ink deposited by screen printing, or a layer of elastic photosensitive resin that is exposed to radiation and for example to rays ultraviolet or electron beams through a mask that has adapted cutouts that are revealed by immersion in a bath.
The stratified strip may consist of at least two alternating stacks of thin metal strips and layers of a hard and fragile adhesive material, the at least two alternating stacks being overlapping and separated by an adherent layer where at least part of the The surface consists of an elastic material resistant to sandblasting.
Preferably, for sandblasting, the laminated strip is glued on a support strip. After sandblasting, the cut-out stratified strip and the support strip can be separated.
To carry out sandblasting, the stratified strip arranged on the support strip can then be placed in a sandblasted recording enclosure comprising at least one sandblasting nozzle which produces a jet of abrasive particles , a relative movement of the stratified strip and of at least one sandblasting nozzle is carried out in order to scan the surface of the stratified strip by the jet of abrasive particles.
By this process, it is possible to engrave on the stratified strip a plurality of parts for electronic components linked together by fixation points, which are separated.
The hard material is fragile, for example an epoxy glue.
Preferably, thin metal strips are made of a material chosen from the following alloys: nanocrystalline magnetic alloys, fragile ferro-cobalt magnetic alloys, fragile ferro-platinum, fragile ferro-silicon, fragile ferro-nickel, fragile nickel-chrome alloys, fragile molybdenum alloys and fragile tungsten alloys.
The support strip can be a strip comprising a layer of polymer and a layer of conductive material such as copper, which can also contain before the sandblasting at least one electronic component that is protected at the moment of sandblasting by a layer of elastic material.
The present invention also deals with a part liable to be obtained by the process according to the present invention, which is for example a passive inductive electronic component core that can contain an air gap and that can also contain at least two parts of different thicknesses.
The part can also constitute an electrical resistance or a capacity.
The present invention also deals with a plate intended to be incorporated in the printed circuit, consisting of a layer of conductive material and a layer of elastic polymeric material, on which a piece of electronic component capable of being obtained by the process according to is glued. with the present invention.
I
The present invention also deals with a manufacturing process of an inductive passive electronic component of the type that comprises a part cut out of a stratified strip consisting of a stack of thin metallic strips in a magnetic alloy, in which said part is manufactured at least according to the present invention, and at least one winding and coating of the component with a protective material is carried out.
When the passive electronic component is capacitive or resistive, the component comprises a piece cut into a stratified strip consisting of a stack of thin metallic strips and by means of electrical connection. In this case, the connection means and the coating of the component with a protective material are also carried out.
The present invention finally deals with a manufacturing process of a printed circuit that comprises at least one passive electronic component that comprises at least one piece consisting of a stratified metallic material with which it is stacked and adhered by gluing at least one plate constituted a layer of conductive material and a layer of elastic polymeric material on which a piece obtained by sandblasting is glued, and at least one plate comprising a layer of polymeric material.
The sandblasting cut process of a stratified strip consisting of an alternate stacking of a strip of very fragile magnetic metallic material and polymer layers, has the advantage of allowing to obtain very diverse magnetic pieces free from cracking, and therefore, with very good magnetic properties.
This process also makes it possible to manufacture thin parts that cannot be manufactured using known techniques. In particular, it makes it possible to manufacture logs whose diameter is very thick. In particular, these are logs less than 1 mm thick, and for example logs close to 1 mm thick and more than 10 mm in diameter, or logs between 20 pm and 200 pm in thickness, and with a diameter that can vary from 1 to a few millimeters.
The present invention will now be described in a more precise but not limiting way in relation to the attached figures, in which:
- Figure 1A schematically represents a stack of nanocrystalline strips glued together by a hard and fragile glue, arranged on a support strip and on which a mask is arranged.
- figure 1B represents the previous stack after sandblasting.
figure 2A represents a stratified strip according to figure 2A consisting of stacked and glued nanocrystalline strips, in which a layer of glue is made up of an elastic glue.
figure 2B represents a stratified strip according to figure 2A consisting of stacked and glued nanocrystalline strips, where a layer of glue consists of elastic glue after sandblasting.
figure 3A represents a stratified strip according to figure 2A consisting of stacked and glued nanocrystalline strips, where a layer of glue is partially made up of elastic glue. The stratified strip is placed on a support and a plate is placed on the strip.
- figure 3B represents the strip of the previous figure after sandblasting.
- figure 4 represents a set consisting of a support strip, a stratified strip consisting of glued nanocrystalline strips and a plate.
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- figure 5 represents the part obtained after sandblasting.
figure 6 is a schematic representation of the manufacturing process of a piece for a magnetic component cut by sandblasting on a stratified strip comprising nanocrystalline strips.
- Figures 7A and 7B schematically represent the manufacture of a printed circuit that includes a magnetic core obtained by cutting out a nanocrystalline material.
The general principle of the present invention is to manufacture parts 10 for passive electronic components, and in particular passive magnetic electronic components such as inductances or magnetic cores, obtained by sandblasting of stratified strips constituted by an alternate stacking of fragile metallic strips. The fragile metallic material has magnetic properties adapted to the manufacture of magnetic electronic components. This material is in particular a nanocrystalline magnetic material of the type Fe-Cu-Nb-B-Si or Fe-Zr-B-Si for example. These materials are described for example in European patent EP 0 271 657 or in European patent EP 0 299 498. This nanocrystalline material, known per se, is obtained by heat treatment of an amorphous strip obtained by ultra-fast solidification of a liquid metallic alloy . This thin strip has a thickness between a few microns and a few tens of microns, in particular between 5 to 50 microns, and in general on the order of 20 microns. The hard and brittle adhesive material is a polymeric material and for example a glue that is naturally hard and brittle, or that has become hard and brittle through an appropriate heat treatment. Such materials generally termed thermosetting are in particular unsaturated polyesters, epoxides, phenolics and polyimides.
In one embodiment of the stratified strip, shown in Figure 1A, the stratified strip generally identified by 1 is homogeneous. It consists of identical thin metal strips 2, and intermediate layers of hard and brittle and identical adhesive material. In figure 1A, the stratified strip 1 is glued to a support strip 5, and a plate 4 is arranged on its upper face.
In a second embodiment represented in keratin fibers 2A, the stratified strip identified generally by 10 consists of a first homogeneous stratified layer 11, consisting of a stack of identical thin metallic tapes 21 separated by layers of a hard and fragile adhesive material 31 and a second stratified layer 12 consisting of a stack of thin metallic strips 22 separated by layers 32 of hard and brittle adhesive material. The two stratified layers are separated by an intermediate layer 33 of an elastic adhesive material. In this embodiment, the elastic intermediate layer 33 extends over the entire surface 2 of the stratified strip. The stratified strip thus obtained is heterogeneous. As in the previous case, a plate 40 and a support strip 50 are shown in the figure.
In a third embodiment shown in Figure 3A, the heterogeneous stratified strip identified generally by 100 is constituted as in the previous case by a first stratified layer 110 consisting of a stack of thin metallic strips 210 separated by layers 310 of hard and fragile adhesive material and a second stratified layer 120, consisting of a stack of thin metallic strips 220 separated by layers of hard and fragile adhesive material 320, and the two stratified layers 110 and 120 are separated by an intermediate layer 330, a part 331 of which is made up of a hard and brittle material, and another part
332 it consists of an elastic adhesive material. In the figure, a support strip 500 and a plate 400 are also shown.
Other embodiments of heterogeneous stratified strips can be considered in which several stratified layers consisting of thin metallic strips become adhered by layers of hard and brittle material, are separated by intermediate layers constituted partially or totally by an elastic material. When the intermediate layers are made up only partially of an elastic material, the parts that are not made of elastic material are made of hard and fragile adhesive material.
The homogeneous or heterogeneous stratified strip can be manufactured by any appropriate process, and in particular by the processes described in French patent application FR 2 788 455.
As an example, and to produce a homogeneous stratified strip, it is possible to proceed as follows: simultaneously rolling out a coil of a strip of flexible and resistant adhesive polymeric material and a coil of a strip of thin metallic material and fragile of a nanocrystalline material, the strip of thin metallic material is glued on the strip of adhesive polymeric material, flexible and resistant. Next, a plurality of strips thus made up of a flexible and resistant polymeric layer and an adherent layer of thin metallic material are made. Next, a plurality of these stratified strips are stacked to form a stratified composite strip comprising thin metal strips separated by layers of flexible, resilient polymeric material. The stratified strip thus constituted is then subjected to a heat treatment designed to make the layers of adhesive polymeric material hard and fragile.
It is also possible to proceed as follows: a first stratified strip is made by gluing a thin metallic strip on a strip of flexible and resistant polymeric adhesive material. Then, the thin metallic surface is covered with a layer of a glue that will be hard and brittle after drying, such as for example an epoxy glue. Then, a thin metallic strip is placed on that layer of glue, which adheres to it. Then, cover the metal surface with a layer of glue that will become hard and brittle after drying, and a new thin metallic strip that adheres is placed over that layer of glue. And the process is continued until a stratified strip of the desired thickness is obtained.
If a heterogeneous composite stratified strip is to be made, a stratified strip of the desired thickness is first performed by one or the other of the processes just described, and a strip with the desired characteristics is glued to the surface of that stratified strip, for example, by screen printing. , that is, a strip that is fully elastic, or a composite strip consisting of an elastic part and a part that is likely to become hard and fragile. Then, a second stratified strip made by one or the other of the processes described above is placed on that intermediate layer. Eventually, the operations are reproduced the desired number of times.
The stratified strips just described comprise a stacking of a plurality of thin metallic strips. But the process is also suitable for stratified strips that contain only a thin metallic layer adhering to a polymeric layer.
Prior to the sandblasting layer, the layer of the stratified strip intended to receive sandblasts, a plate 4, 40, 400, or a mask made of a sandblast-resistant material with openings 7 is placed on the face , 70, 700 which have the shapes corresponding to the shapes according to which the stratified strip is to be cut.
The plate can be made in several ways.
In a first embodiment, the sheet is a sufficiently thick metal strip, for example of sandblast resistant material, and which has cutouts that have the shapes according to which the stratified strip is to be cut.
In another embodiment, the sheet may be constituted by a strip of one of an elastic polymeric material which further comprises appropriate cutouts. The material must be elastic in order to be able to resist sandblasting.
In a third embodiment, the sheet is made by depositing on the stratified strip surface a layer of elastic sandblast-resistant paint according to motifs that correspond to the motifs according to which the stratified strip is to be cut. This layer of ink is deposited, for example, by screen printing.
A layer of photosensitive resin can also be deposited on the stratified strip, which is exposed to radiation such as ultraviolet rays or an electron beam through a mask in an appropriate manner and which is revealed in a bath that dissolves the non-irradiated parts.
When the plate is a “contact plate” type plate, that is, it consists of a plate that holds openings, it is not possible to make parts disconnected from each other right after sandblasting. On the other hand, when the plate consists, for example, of a photosensitive resin layer, it is possible to make parts disconnected from each other and in particular small logs arranged inside the larger diameter logs.
These modes of realization of the sheets are modes of realizations known per se to the person skilled in the art.
In order to be more easily manipulated, the stratified strip
1, 10 or 100, can be arranged on a support strip 5, 50 or 500 or on a support plate, consisting of a material that has good mechanical resistance and is resistant to sandblasting. The stratified strip can be glued to this support strip with a soluble glue or with a resistant glue. The support strip can, according to the applications considered, consist of a resistant metallic material such as steel, or an elastic polymeric material, or even a polymeric material that comprises a metallic conductive layer on its underside such as like a layer of copper.
As shown in figure 6, to perform sandblasting, the set consisting of a stratified strip 1, the plate 4, and possibly the support strip 5, under a nozzle, is moved in a sandblasting room 80 sandblasting 81 that project on the upper surface, that is, on the surface comprising the plate, jets 82 of abrasive particles or abrasive sand. Such abrasive particles are, for example, alumina or silica particles. Perpendicular to the openings of the plate, the abrasive sand scrapes the stratified strip until it reaches an abrasion resistant layer. This abrasion of the laminated strip ensures the engraving and cutting of the pieces 6. This process described for a laminated strip according to figure 11, applies in the same way to the strips that correspond to the other ways of making a laminated strip.
The sandblasting enclosure can contain a plurality of nozzles that ensure the projection of abrasive particles over a plurality of areas. However, the areas do not necessarily cover the entire surface to be blasted. Thus, to ensure a blasting of the entire surface to be blasted, it is possible to scan this surface by relative movements of blasting nozzles and the strip to be blasted. These relative movements can be performed for example by an alternating movement of nozzles in a direction perpendicular to the axis of the strip to be blasted and by a movement of the strip to be blasted in a direction parallel to its axis. When the support is a support plate, it can be placed on a plate with two movements in directions perpendicular to each other, parallel to the surface of the plate.
When the stratified strip 1 is a homogeneous stratified strip as shown in figure 1A, the jet of sand that passes through the openings 7 left free by the mask 4 causes the strip to abrasion in all its thickness until reaching the support strip 5. They obtain thus, several different parts 6 and 6 ', shown in figure 1B, whose thickness is constant and equal to the thickness of the stratified strip.
When the laminate strip is a composite laminate strip 10 as shown in figure 2A, comprising a continuous intermediate layer 33, the sand jets penetrate through the spaces 70 left free by the mask 40, causing abrasion in the upper laminate layer 11 of the laminate strip, until reach the intermediate layer 33 of elastic material. This results in a strip shown in Figure 2B consisting of a first stratified layer 60 on which stratified elements 61 are arranged, separated by voids. This results in a stratified strip whose thickness is not constant. This stratified strip can be, for example, a strip on which parallel strips have been recorded which can form a diffraction network for electromagnetic waves.
When the laminate strip is a composite laminate strip 10, as shown in Figure 3A, whose intermediate layer 330 is a partially elastic and partially fragile intermediate layer, the areas 700 left free by the mask perpendicularly to the elastic intermediate layer 332 are only recorded until the elastic intermediate layer 332 whereas the areas 710 left free by the mask perpendicularly to the areas of the intermediate layer 331 that are hard and fragile, the engraving is carried out up to the support layer 500. Magnetic parts 600 are thus obtained, shown in figure 3B, which may have parts 610, 620 of different thicknesses.
An example of carrying out the process for making stratified nanocrystalline logs is shown in figure 4 and in figure 5. A stratified strip 13 consisting of a stack of glued nanocrystalline stratified strips is arranged on a support strip 15 and glued on that strip with a glue soluble. On the upper face of the stratified strip 13, a plate 14 is arranged, comprising cutouts 17 that delimit logs 18A, 18B, 18C and 18D of various sizes, logs 18A, 18B, 18C and 18D which are connected by fixing points 19A, 19B , 19C and 19D on the remaining parts of the plate 14. This stack is sandblasted in order to be engraved. During blasting, the parts of strip 13 that are perpendicular to the openings 17 undergo complete abrasion until the sand reaches the support layer 15. After blasting, plate 14 is removed. Thus, a stratified strip cut adhering to the support strip 15 is obtained. The cutouts of the stratified strip delimit the parts 16A, 16B, 16C and 16D which are rounded in the form of slices and which are fixed in a peripheral part of the stratified strip by means of of attachment points. The cut laminated strip 13 is then cleaned, eventually coated with a protective polymer and separated from the support strip 5. In this way, a stratified strip 13 'shown in figure 5 is obtained. Parts 16A, 16B, 16C and 16D are then separated from the stratified strip cut from strip 13', possibly by blasting, and thus a plurality of logs are obtained. which constitute parts for discrete magnetic electronic components. The logs thus obtained can have very different dimensions that can range from a few millimeters in diameter and even a millimeter in diameter to several millimeters in diameter, with thicknesses ranging from a few tens of microns to a few hundred microns, and even more depending on the number of layers of nanocrystalline strips that have been stacked to make the stratified strip. These logs thus obtained can then be coated and wound in order to manufacture passive magnetic electronic components, such as inductances, transformers, rotors or stators of micromotors, or even any magnetic type component. In addition, the process makes it possible to manufacture logs that contain an air gap. To do this, it is sufficient to provide a sufficiently thin radial cut, for example on the order of 1/10 mm wide or less.
As previously indicated, when the stratified strip is a heterogeneous stratified strip that comprises an intermediate layer of a totally or partially elastic material, magnetic pieces are obtained that have areas of great thickness and areas of small thickness. These parts can have different shapes that correspond to particular applications that the technician in the subject knows how to determine. As in the previous case, after blasting, the pre-cut stratified strip is cleaned, and then the different elementary parts are separated and conditioned in order to be able to use them later as parts incorporated into the electronic components. These components are, for example, inductances, transformers, filters, antennas, rotors or stators of micromotors for watches.
The process just described allows you to manufacture discrete electronic components. But it also allows for the manufacture of electronic components embedded in printed circuits.
In order to make magnetic electronic components incorporated in the printed circuits, it is possible to proceed in several ways. In particular, the stratified strip consisting of stacked monocrystalline strips can be arranged on a support plate consisting on one side of a layer of a polymeric material capable of becoming one of the layers of a printed circuit, a polymeric layer that is coated on its underside by a copper layer that can be etched by chemical engraving to form conductive elements as is done in a way known in itself in the manufacture of printed circuits. The stratified strip is glued to the support plate by means of a protective glue so that the blasting that cuts the part on the stratified strip does not cut the polymeric support plate. After cutting the stratified strip to form a piece of passive inductive electronic component, the set is cleaned, but the piece obtained is not detached from the support plate. Instead, this piece is left on the support plate. As shown in figure 7A, a plate 51 is obtained on which a piece of inductive electronic component in the form of a torus is glued. The plate 51 comprises a layer 52 of polymeric material on which the electronic component part 54 is glued, and a lower layer 53 of copper. By means of a sufficient glue sufficiently fluid to fill all the cavities without leaving bubbles, a second plate 55, consisting of a layer of polymeric material 56 and an upper layer, is then glued to the upper face of the plate. 57 of conductive material such as copper. The copper layers 53 and 57 are then etched by chemical engraving to form conductors 58 arranged radially in relation to the torus 54 which is included between the two outer layers 51 and 55 of the printed circuit shown in figure 7B. The conductors 58 of the upper face and the lower face are connected by conductive passages 59 constituted by holes whose walls are covered with a conductive material, in order to form windings. Thus, a printed circuit is obtained which comprises an inductance or an integrated transformer. The technique of manufacturing conductors is a technique known in itself in the manufacture of printed circuits. It should be noted that the recording of the conductors in the copper layers can be done not after the assembly of the plates that constitute the printed circuit, but before this operation. The order in which these operations are performed is just a matter of manufacturing convenience.
In a particular embodiment, and in order to avoid over-thickness between the upper layer and the lower layer of the printed circuit, a single monocrystalline layer can be deposited on the lower layer of the printed circuit, and then a plurality of layers can be made. intermediates made up of a polymer compatible with the manufacture of printed circuits on which a nanocrystalline layer is available, which is etched by blasting, and a plurality of intermediate layers are stacked so that the logs of the intermediate layers are located face to face. Then, the set is covered with a layer of polymeric material that contains a layer of copper, and connections are made by chemical etching and drilling of the holes whose walls are lined with a conductive material. You can also drill the holes first and coat your walls with conductive material, and then tape the connections.
It is also possible to proceed by making a magnetic circuit on a support plate such as a log that has a relatively large thickness of a few tenths of millimeters or a millimeter or more, and then lay out layers of polymeric material on that first support plate. in which a cavity that has the shape of the torus has been predicted to fit around the torus, fill the interstices around the torus with a resin sufficiently fluid to prevent bubbles, and then covering the whole with a superficial layer of polymeric material covered by a copper layer on which connections can be engraved.
In this manufacturing process, the support layer on which the stratified strip was placed to be cut may previously contain electronic circuits that must be protected during the blasting operation. For this, before the blasting, a protective layer of an elastic material that is resistant to blasting is placed on the support layer.
By this process, printed circuits can be manufactured that contain magnetic circuits incorporated in the thickness of the printed circuit. This technique can also be applied to the manufacture of electronic cards, for example smart cards, to which an inductive magnetic circuit such as a self or transformer can be incorporated. It is also possible to incorporate magnetic circuits that can serve as an antenna or any other type of magnetic circuit that the technician in the subject will know how to determine.
It should be noted that the support plates of polymeric material can be composite plates made of a woven material and impregnated with resin commonly used in the manufacture of printed circuits.
The present invention, as just described, is also applicable to the manufacture of passive electronic components made of materials other than nanocrystalline materials, provided that these materials are metallic materials that are in the form of thin, hard and fragile strips, that is, susceptible to be etched by blasting. Such materials are for example materials such as certain ferro-cobalt alloys, ferroplatin, ferro-silicon, ferro-nickel, some nickel-chromium alloys or certain molybdenum alloys or certain tungsten alloys. The person skilled in the art knows these leagues.
The passive electronic components obtained by this process can also be electronic components of the capacitive or resistive type. To obtain these components, simply add connections to the metal faces of the parts obtained. As an example, to make a capacitive compound, it is enough to make a connection on a metallic layer and a connection on another metallic layer, being that the two metallic layers are separated by at least one insulating layer that has appropriate electrical properties. To obtain a resistive component, simply create two electrical connections on the same metallic layer.
In the process that has just been described, a single blasting operation has been envisaged, but to perform certain geometries, or for productivity reasons, it may be useful to make the cut by several successive blasting operations carried out with different masks. A manufacturing process comprising a plurality of successive blasting operations is also part of the present invention.
Finally, the process can be applied to cut parts in stratified strips that comprise a single thin and fragile strip or a thin and fragile metallic strip glued on an elastic and blast resistant polymer strip, and this elastic polymer strip can be glued on a stratified strip comprising one or more thin and fragile metal strips and possibly one or more layers of a hard and fragile adhesive material.
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Contents2
21 members in 9 offices
Priority claims2
| Document | Office | Kind | Date |
|---|---|---|---|
| 0307563 | France | A | |
| 2004001556 | France | W |
Members21
| Document | Office | Kind | |
|---|---|---|---|
| FR2856552A1 | France | A1 | |
| CA2529899A1 | Canada | A1 | |
| CA2774224A1 | Canada | A1 | |
| WO2005002308A2 | World Intellectual Property Organization (WIPO) | A2 | |
| WO2005002308A3 | World Intellectual Property Organization (WIPO) | A3 | |
| FR2856552B1 | France | B1 | |
| KR20060017651A | Republic of Korea | A | |
| EP1637017A2 | European Patent Office (EPO) | A2 | |
| BRPI0411684AThis record | Brazil | A | |
| CN1830232A | China | A | |
| US2007119284A1 | United States of America | A1 | |
| JP2007520872A | Japan | A | |
| JP2009224800A | Japan | A | |
| JP4381414B2 | Japan | B2 | |
| US2009314521A1 | United States of America | A1 | |
| US7640641B2 | United States of America | B2 | |
| KR101104385B1 | Republic of Korea | B1 | |
| JP4917632B2 | Japan | B2 | |
| CN1830232B | China | B | |
| CA2529899C | Canada | C | |
| US8362361B2 | United States of America | B2 |
4 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]LapsedREFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2333 DE 22/09/2015.B08K | B08K | |
| Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]REFERENTE A 11A ANUIDADE.B08F | B08F | |
| Application fees: decision cancelled [chapter 8.8 patent gazette]REFERENTE A DESPACHO 8.6 NA RPI 2159 DE 22/05/2012.B08H | B08H | |
| Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]REFERENTE A 6A ANUIDADE.B08F | B08F |
Numbers
- Application
- 4116844
Titles2
- Portuguese
- processo de fabricação de peças para componentes eletrÈnicos passivos, peças, placa, processos de fabricação de um componente eletrÈnico passivo e de um circuito impresso
- English
- parts manufacturing process for passive electronic components, parts, plate, manufacturing processes for a passive electronic component and a printed circuit
Classification
- CPC, 18
- H01F41/046
- H01F10/12
- H01F10/131
- H01F17/0033
- H01F41/0233
- H01F41/042
- H05K3/0044
- H01F10/138
- H01F10/265
- Y10T29/435
- Y10T29/49126
- Y10T29/49156
- Y10T29/49155
- Y10T29/49002
- Y10T83/0591
- H01F41/14
- H01F10/13
- B82Y25/00
- IPC, 5
- H01F10 13
- H01F17 00
- H01F41 02
- H01F41 04
- H05K3 00