EP2763824A1 - Procede de realisation d'une operation mecanique dans une structure comportant deux couches de rigidites differentes - Google Patents
Procede de realisation d'une operation mecanique dans une structure comportant deux couches de rigidites differentesInfo
- Publication number
- EP2763824A1 EP2763824A1 EP12770111.8A EP12770111A EP2763824A1 EP 2763824 A1 EP2763824 A1 EP 2763824A1 EP 12770111 A EP12770111 A EP 12770111A EP 2763824 A1 EP2763824 A1 EP 2763824A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- zone
- tool
- mechanical operation
- thinning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims description 13
- 230000035515 penetration Effects 0.000 claims description 12
- 238000009966 trimming Methods 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 6
- 230000001965 increasing effect Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910021419 crystalline silicon Inorganic materials 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 230000002427 irreversible effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004377 microelectronic Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 2
- 238000000608 laser ablation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
- B24B7/228—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding thin, brittle parts, e.g. semiconductors, wafers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/06—Grooving involving removal of material from the surface of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
- B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0058—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material
- B28D5/0082—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material for supporting, holding, feeding, conveying or discharging work
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/02—Other than completely through work thickness
Definitions
- the invention relates to a method for producing a mechanical operation in a structure comprising at least a first rigid layer stacked on a second less rigid layer, the operation involving the application of a bearing force on the structure, the side of the first layer.
- a mechanical operation corresponds for example to a cutting, a thinning or a trimming of the structure.
- a mechanical operation such as cutting, thinning or trimming
- a structure comprising a first layer of a few microns in thickness, for example composed of crystalline silicon, covering a second layer of polymer more
- the thickness of the polymer which is, for example, in a rubbery (or rubbery) state, with respect to the crystalline silicon, thicker than the first layer, can cause irreversible damage in the first silicon layer due to the flexion of the silicon. due to the support force applied by the cutting, thinning or trimming tool on the first layer.
- FIG. 1A Such a structure 10 is shown in FIG. 1A, and comprises, for example, a first crystalline silicon layer 12 whose thickness is for example between about 5 ⁇ m and 20 ⁇ m, secured to a second layer 14 of polymer whose thickness is for example between about 0.5 mm and 2 mm.
- a sawing tool 16 for example a rotating blade, comes to apply a bearing force on the upper face of the first layer 12, perpendicularly to this face ( Figure 1B).
- the first layer 12 then deforms locally with a certain curvature at the bearing zone of the sawing tool 16 on the structure 10, inducing a bending of the first layer 12 and causing irreversible damage in the first layer 12, such as breaks, detachments of parts of the first layer, cracks, etc. (See Figure 1C in which damage 18 is represented symbolically in the first layer 12).
- An object of the present invention is to provide a new method for performing a mechanical operation on a structure as described previously, that is to say having a first so-called rigid layer, for example composed of a material whose average Young's modulus is greater than or equal to about 50 GPa, covering a second softer layer than the first layer and composed of a material whose Young's modulus is for example less than about 50 GPa, typically less than about 1 GPa or less than about 100 MPa or even less than about 50 MPa, which involves the application of a force of support on this structure, but which avoids damaging the structure.
- the invention proposes a method for producing at least one mechanical operation on a structure comprising at least a first layer stacked on at least a second layer, the first layer being composed of at least one material whose modulus of Young is greater than or equal to about 50 GPa and greater than that of at least one material of which the second layer is composed, comprising at least the steps of:
- the structure can undergo a flexion important without damaging the first layer.
- a method can be applied for any type of mechanical operation involving a support on the structure.
- the implementation of the mechanical operation can include the use of at least one tool in said zone of the structure, whose support on the structure, during the implementation of the mechanical operation, can be realized at a support zone, or support location, of the structure.
- a tool may correspond for example to a saw blade or a diamond wheel of a thinning or trimming device.
- the support of the tool may cause deformation of the structure.
- the mechanical operation may comprise at least one cutting and / or thinning and / or trimming of the structure made at least on and / or next to said zone of the structure.
- Thinning may be performed at said area of the structure over the entire thickness of the first layer. This eliminates all the material of the first layer located at said area of the structure.
- the thinning may be performed only on a portion of the thickness of the first layer. This eliminates a portion of the material of the first layer at said area of the structure.
- the thinned thickness of the first layer may be a function of the initial thickness of the first layer and the relative stiffnesses of the first and second layers of the first layer. structure to allow, after thinning, a bending of the structure which does not induce or little damage within the first layer.
- the dimensions of said zone of the structure, in a plane parallel to one face of the first layer disposed opposite the second layer, may be greater than or equal to a penetration depth (or thickness) of the tool in the second layer (during the implementation of the mechanical operation), possibly increased by the width of the tool in the same plane at the level of the support zone.
- the dimensions of said zone of the structure, in the plane parallel to the face of the first layer disposed facing the second layer, are greater than or equal to approximately twice the depth of penetration of the tool in the second layer.
- the dimensions of said zone of the structure, in the plane parallel to the face of the first layer disposed facing the second layer, may be greater than or equal to the sum of twice the depth of penetration of the tool in the second layer and the width of the tool in the same plane at the level of the support zone.
- the dimensions of said zone of the structure in a plane parallel to one face of the first layer disposed opposite the second layer, may be greater than or equal to the thickness of the deformation of the second layer generated by the support of the tool, or to twice this thickness, possibly plus the width of the tool at the level of the support zone.
- Thinning of the first layer located at said zone of the structure may be made around at least a portion of the first layer disposed in said zone of the structure, the mechanical operation comprising the application of the force of localized support on said portion of the first layer.
- a width of said portion of the first layer may be less than about three times a width of the tool at the area of support. This configuration is particularly advantageous when the tool corresponds to a saw blade.
- the first layer may have a thickness of between about 0.1 ⁇ m and 100 ⁇ m, or between about 1 ⁇ m and 50 ⁇ m, or between about 1 ⁇ m and 20 ⁇ m, and / or the second layer may have a thickness greater than about 500 ⁇ m. pm, for example between about 0.5 mm and 2 mm.
- the first layer may be composed of at least one semiconductor (for example silicon), and / or the second layer may be composed of at least one polymer, for example a rubbery polymer (whose Young's modulus is for example less than or equal to about 1 GPa) or rubbery (whose Young's modulus is for example less than or equal to about 50 MPa).
- the structure may correspond to a microelectronic type substrate.
- the bearing force can be applied substantially perpendicular to a face of the first layer disposed opposite the second layer.
- FIGS. 1A to 1C show the realization of a mechanical cutting operation according to the prior art
- FIGS. 2A to 2C show the steps of a method of performing a mechanical operation, object of the present invention, according to a particular embodiment
- FIGS. 3 to 5 show several variants of localized thinning achieved during a method of carrying out a mechanical operation, object of the present invention
- FIGS. 6A, 6B, 7A and 7B represent steps of a method of performing a mechanical operation, object of the present invention, according to other embodiments.
- FIGS. 2A to 2C represent the steps of a method for performing a mechanical operation, here a cutting or sawing operation, in the structure 10 which corresponds to that previously described. in connection with Figure 1A, according to a particular embodiment.
- the structure 10 corresponds to a substrate of microelectronic type, that is to say a substrate on which microelectronic devices are intended to be made.
- FIGS. 2A and 2B which respectively correspond to a partially sectional sectional view and a top view of the structure 10, a thinning of the first layer 12 located in a zone 20 of the structure 10, the mechanical cutting operation being intended to be performed later at this zone 20.
- the thinning is performed through the entire thickness (dimension along the Z axis) of the first layer 12.
- This localized thinning forms the zone 20 which corresponds to a groove dug in the first layer 12.
- This localized thinning can be achieved via different techniques: dry etching, wet etching, laser ablation, etc.
- the sawing tool 16 After achieving this localized thinning, it is possible to implement the sawing operation of the structure 10. As shown in FIG. 2C, the sawing tool 16, for example a blade animated with a rotational movement, then comes into operation. perform a mechanical support on the structure 10, at the zone 20 which has previously undergone localized thinning. This support is reflected here on the structure 10 by a bearing force applied in the zone 20 on the second layer 14, perpendicularly to the face of the second layer 14 which is opposite the first layer 12. Due to the thinning located localized previously, the sawing tool 16 is in direct contact with the second layer 14.
- the sawing tool 16 Due to the thinning located localized previously, the sawing tool 16 is in direct contact with the second layer 14.
- the structure 10 can be cut along the entire length of the groove previously achieved by thinning, without the first layer 12 breaks or is damaged due to the pressing force applied by the sawing tool 16 on the structure 10, because the first layer 12 does not sag or much less than without thinning.
- the first layer 12 is preserved from any damage that could have been caused by the tool of sawing 16 if the first layer 12 had not been thinned locally.
- the zone 20 is advantageously dimensioned such that its width (dimension along the x axis) is greater than or equal to about twice the penetration depth of the tool 16 in the second layer 14 when of the mechanical operation performed after the thinning (in FIG. 2C, this depth of penetration, which corresponds to the depth up to which the second layer is cut, corresponds to the distance between the interface of the first layer and of the second layer and the lower end of the sawing tool 16), optionally increased by the width of the tool 16 at the level of the bearing zone on the structure 10.
- the localized thinning at zone 20 is achieved through only a portion of the thickness of the first layer 12.
- This thinning is for example implemented such that at the level of of the zone 20, a remaining portion 22 of the first layer 12 always covers the second layer 14.
- the thickness of the first layer 12 to be thinned can be determined as a function of the initial thickness of the first layer 12 and the relative stiffnesses first and second layers, to allow, after thinning, bending of the structure does not induce or little damage within the first layer 12. Preliminary tests may be performed by gradually increasing the thinned thickness to get the required result.
- the width of the zone 20 will be advantageously greater than or equal to about twice the thickness of the deformed area of the second layer due to the support of the tool on the first layer (i.e. the depth in the second layer 14 to which deformations are generated by the support of the tool, and beyond which the material of the second layer is no longer deformed by the support of the tool).
- the portion 22 of reduced thickness can therefore undergo a bending having a radius of curvature much smaller than that at from which the first layer 12 not thinned would suffer irreversible damage.
- the localized thinning at the zone 20 is made such that a portion 24 of the first layer 12 is preserved in the thinned zone 20, advantageously in its center. This portion 24 thus forms a bearing zone for the sawing tool 16 during the implementation of the cutting operation of the structure 10.
- the width of the portion 24 (dimension along the X axis) is for example between one and three times the width of the sawing tool 16.
- the portion 24 may have a thickness (dimension along the Z axis) equal to the initial thickness of the first layer 12, but it is also possible that the portion 24 has a thickness less than that of the initial thickness of the first layer 12. Again, such localized thinning can be implemented via dry or wet etching, or laser ablation.
- the total width of the zone 20 is for example equal to the width of the portion 24 increased by about twice the depth of penetration of the tool in the second layer 14 (or if the tool does not penetrate in the second layer, twice the thickness of the deformed zone of the second layer 14 due to the support of the tool on the portion 24).
- FIG. 5 it is possible to combine the two variants previously described in connection with FIGS. 3, 4A and 4B, by performing localized thinning at the zone 20 such that the remaining portion 22 of the first layer 12 always covers the second layer 14 at the thinned zone 20, and that the portion 24 is also present in the thinned zone 20.
- the mechanical operation performed may be different from a sawing operation, and corresponds for example to a trimming operation of the structure 10.
- the implementation of such a trimming is shown in FIGS. 6A and 6B (respectively seen in FIG. profile section and top view of structure 10).
- the thinned zone 20 forms here an area for defining a peripheral portion 26 of the first layer 12 to be eliminated by the implementation of the clipping operation and a central portion 28 of the first layer 12 that is desired keep.
- This clipping operation is for example implemented using a tool 30 provided with a diamond wheel for removing the peripheral portion 26 of the first layer 12.
- the tool 30 does not damage the central portion 28 through the thinned zone 20 made in the structure 10, the tool 30 is based on the structure 10 especially at the region 26 to be cut.
- the deformation of the zone 28 due to this support is thus reduced and does not cause damage in the zone 28.
- the width of the thinned zone 20 is advantageously greater than the thickness of the deformed zone of the second layer 14 because of support from the tool 30 on the zone 26, and advantageously greater than the penetration depth of the tool 30 in the second layer 14.
- the mechanical operation may correspond for example to a localized thinning operation of the structure 10.
- the implementation of such thinning is shown in FIGS. 7A (before thinning) and 7B (after thinning).
- the thinned zone 20 here forms a zone making it possible to delimit a peripheral portion 26 of the first layer 12 whose total thickness is intended to be conserved and a central portion 28 of the first layer that it is desired to thin through the implementation. of the thinning operation.
- This thinning operation is for example implemented thanks to the tool 30 whose diamond wheel makes it possible to eliminate part or all of the thickness of the central portion 28 of the first layer 12 (see FIG. 7B the thinned central portion 32).
- the width of the thinned zone 20 will in this case advantageously be greater than the thickness of the deformed zone of the second layer 14 because of the support of the tool 30 on the zone 28 and advantageously greater than the penetration depth of the tool 30 in the second layer 14.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Details Of Cutting Devices (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1158994A FR2980996B1 (fr) | 2011-10-05 | 2011-10-05 | Procede de realisation d'une operation mecanique dans une structure comportant deux couches de rigidites differentes |
| PCT/EP2012/069425 WO2013050352A1 (fr) | 2011-10-05 | 2012-10-02 | Procede de realisation d'une operation mecanique dans une structure comportant deux couches de rigidites differentes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2763824A1 true EP2763824A1 (fr) | 2014-08-13 |
Family
ID=47008592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12770111.8A Withdrawn EP2763824A1 (fr) | 2011-10-05 | 2012-10-02 | Procede de realisation d'une operation mecanique dans une structure comportant deux couches de rigidites differentes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20140238213A1 (fr) |
| EP (1) | EP2763824A1 (fr) |
| JP (1) | JP2014531987A (fr) |
| FR (1) | FR2980996B1 (fr) |
| WO (1) | WO2013050352A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10886251B2 (en) | 2017-04-21 | 2021-01-05 | Toyota Motor Engineering & Manufacturing North America, Inc. | Multi-layered composite bonding materials and power electronics assemblies incorporating the same |
| US10381223B2 (en) | 2017-11-28 | 2019-08-13 | Toyota Motor Engineering & Manufacturing North America, Inc. | Multilayer composite bonding materials and power electronics assemblies incorporating the same |
| CN108747773B (zh) * | 2018-06-08 | 2020-08-25 | 永康市金牛机械有限公司 | 防卡死自动定位检测砂轮锯装置 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1307211A (en) * | 1969-02-07 | 1973-02-14 | Vandervell Products Ltd | Methods and apparatus for cutting laminated strip material |
| JPH0574932A (ja) * | 1991-09-17 | 1993-03-26 | Fujitsu Ltd | 半導体ウエハのダイシング方法 |
| DE19851353C1 (de) * | 1998-11-06 | 1999-10-07 | Schott Glas | Verfahren und Vorrichtung zum Schneiden eines Laminats aus einem sprödbrüchigen Werkstoff und einem Kunststoff |
| JP4938998B2 (ja) * | 2004-06-07 | 2012-05-23 | 富士通株式会社 | 基板及び積層体の切断方法、並びに積層体の製造方法 |
| JP4719042B2 (ja) * | 2006-03-16 | 2011-07-06 | 株式会社東芝 | 半導体装置の製造方法 |
| JP2009295696A (ja) * | 2008-06-03 | 2009-12-17 | Sumco Corp | シリコンウェーハ |
| JP2010123683A (ja) * | 2008-11-18 | 2010-06-03 | Nec Electronics Corp | ダイシング装置およびダイシング装置用のアダプター |
| JP5732758B2 (ja) * | 2010-07-13 | 2015-06-10 | 旭硝子株式会社 | 固体撮像装置用カバーガラス |
-
2011
- 2011-10-05 FR FR1158994A patent/FR2980996B1/fr not_active Expired - Fee Related
-
2012
- 2012-10-02 WO PCT/EP2012/069425 patent/WO2013050352A1/fr not_active Ceased
- 2012-10-02 US US14/348,758 patent/US20140238213A1/en not_active Abandoned
- 2012-10-02 EP EP12770111.8A patent/EP2763824A1/fr not_active Withdrawn
- 2012-10-02 JP JP2014533852A patent/JP2014531987A/ja active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013050352A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2980996B1 (fr) | 2013-12-27 |
| JP2014531987A (ja) | 2014-12-04 |
| FR2980996A1 (fr) | 2013-04-12 |
| US20140238213A1 (en) | 2014-08-28 |
| WO2013050352A1 (fr) | 2013-04-11 |
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