WO1999067820A1 - Verfahren zur fertigung von dünnen substratschichten - Google Patents
Verfahren zur fertigung von dünnen substratschichten Download PDFInfo
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- WO1999067820A1 WO1999067820A1 PCT/DE1999/001826 DE9901826W WO9967820A1 WO 1999067820 A1 WO1999067820 A1 WO 1999067820A1 DE 9901826 W DE9901826 W DE 9901826W WO 9967820 A1 WO9967820 A1 WO 9967820A1
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- channel
- layer
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/20—Deposition of semiconductor materials on a substrate, e.g. epitaxial growth solid phase epitaxy
- H01L21/2003—Deposition of semiconductor materials on a substrate, e.g. epitaxial growth solid phase epitaxy characterised by the substrate
- H01L21/2007—Bonding of semiconductor wafers to insulating substrates or to semiconducting substrates using an intermediate insulating layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3063—Electrolytic etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/68363—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used in a transfer process involving transfer directly from an origin substrate to a target substrate without use of an intermediate handle substrate
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/967—Semiconductor on specified insulator
Definitions
- the invention relates to a method for producing thin substrate layers, in particular thin semiconductor regions, which can contain integrated circuits.
- wafers In silicon technology, integrated circuits are manufactured on substrates, the so-called wafers. These wafers consist of monocrystalline silicon, typically 700 ⁇ m thick and currently 200 mm in diameter, soon to be 300 mm. The Determining the thickness of the substrates to 700 ⁇ m has various procedural and physical aspects. On the one hand, the precision and yield when sawing the crystal rods drawn from the melt into wafers and their subsequent polishing play a role, on the other hand, the mechanical stability and sufficient thermal mass must be guaranteed during the actual processing of the ICs.
- the wafers and thus the individual chips of the wafer are thinned down to residual thicknesses from 200 ⁇ m down to currently 120 ⁇ m in order to be able to be installed in housings or in particular also chip cards.
- the finished processed wafers are usually thinned by grinding.
- the back of the wafer is removed mechanically using a grinding paste and suitable abrasive carriers to the desired residual thickness.
- Silicon as a monocrystalline substance cannot be machined. Rather, so-called microcracks occur during grinding due to the crystalline nature, which, if the process is unsuitable, can even reach the Continue the device region of the wafer and destroy the functionality of the circuits. This fact limits the residual thickness of the silicon substrates that can be achieved by grinding, and as a rule to a thickness that corresponds to 5 to 10 times the size of the abrasive grain.
- the wafer is thinned after the processing of the circuits.
- the processes leading to thinning therefore take place on a wafer that has already accumulated the entire high added value of chip production on its surface.
- incorrect thinning leads to a reduction in the yield and thus to large losses in value.
- compliance with the desired Residual thickness is more difficult because of the possibility of (local) residual thickness measurement, which is disturbed by the implemented components.
- SOI wafers carry an insulator layer buried just below the surface, usually in the form of an Si0 layer.
- There are several methods for manufacturing such SOI wafers see, for example, WP Maszara et al.: "SOI-Materials for Mainstream CMOS Technology", in SOI Technology and Devices VIII, ed .: S. Christoloveanu, The Electrochemical Society Proceedings 97-23 , 1997), which are outlined below.
- BESOI Bit Etched-Back Silicon On Insulator
- two oxidized silicon wafers are firmly bonded by thermal bonding and the covalent bonds produced with them. Then one of the two wafers is thinned back to the useful thickness.
- a special variant of the BESOI technology (“SmartCut®” or IonCut) uses special methods for thinning, which are based on the implementation of an ion implantation buried under the surface
- SOI wafers based on the SIMOX and BESOI processes have been developed for use in recent years. They are increasingly used in the fields of high temperature electronics and low power electronics "and are commercially available in large quantities.
- Such SOI wafers can be used for the production of extremely thin ICs.
- the subsequent removal of the thick carrier wafer by grinding, wet or dry chemical etching, etc. can then advantageously be stopped on the buried layer.
- mechanical grinding and in particular its refined form of chemical mechanical
- the buried Si0 2 layer can serve as a mechanically hard stop layer.
- mechanical defects such as microcracks cannot or hardly cross the amorphous SiO layer.
- the high selectivity better than 1: 100
- the Si0 2 layer can also serve as a selective stop layer.
- local self-limitation of the etching process can be exploited due to the decreasing lateral conductivity.
- One advantage of using SOI wafers is that the process leading to the subsequent thinning, namely the implementation of a buried layer under the silicon of the useful wafer, takes place before the actual semiconductor processing. On the one hand, this does not endanger a high added value, and on the other hand, particularly simple, optical or acoustic layer thickness measurement methods can be used, since the wafer does not yet have any local ones at this stage Structures, metals, etc. that make contactless and precise thickness measurements difficult or impossible.
- the object of the present invention is to provide an inexpensive and fast method for producing thin substrate layers which is suitable for the production of extremely thin ICs and avoids the above problems.
- a first and a second substrate are connected to their front sides via one or more intermediate connecting layers. At least one of the connecting layers or the front of one of the substrates is designed in such a way that it has channel-shaped depressions which have a lateral one
- the first substrate is then thinned from the back to a thin substrate layer.
- This thin substrate Layer is finally detached from the second substrate by introducing the etchant into the channel-shaped depressions.
- the two substrates preferably represent semiconductor wafers for the production of ICs.
- the processing of these wafers is carried out as usual in the context of the manufacture of IC or individual components. Deflections of the wafers do not occur as long as the width of the channels (preferably 0.1-2 ⁇ m) is at a fraction of the wear layer thickness of the semiconductor layer (typically 0.5-20 ⁇ m).
- the structured connection layer serves as a sacrificial layer.
- This layer is either laterally accessible from the side of the wafer at all times or, in a preferred embodiment, as soon as the hermetically sealed wafer edge is removed / opened. This takes place automatically, in particular, when the wafer is separated into chips. Before this, the thin chips are advantageously fixed on a carrier substrate.
- the separation of the useful and bulk layers is preferably carried out by wet chemical etching.
- the etchant eg HF
- the driving forces are the chemical reaction and the surface tension.
- the flow rate or the amount passed through is approximately described by the Hagen-Poiseuille law and depends on the canal lumen in 4th power.
- the reaction products for example SiF 4
- thermal gradients for example generated by IR laser radiation
- vertical holes or slots can be provided or etched in the wear layer for the supply and discharge of the etchant.
- the scribe or saw frame generated between the chips is advantageously used for the supply and discharge of the etchant.
- the channel-shaped depressions need not necessarily be linear. They also do not necessarily have to have a rectangular cross section.
- the vertical walls or edges of the channels can also have a direction deviating from 90 ° relative to the surface. This beveling of the edges can result automatically due to the technical peculiarities of the etching process, in particular the undercut of the mask during wet chemical etching.
- special methods for edge beveling or edge overhang can also be used. An edge overhang leads to the advantage of a relative increase in the bonding oxide area. Methods for influencing the etching edge bevel are known to the person skilled in the art in the context of the wet and dry etching technology used in semiconductor technology.
- the specified method can be expanded or modified in that the channels are not, or not exclusively, created in the connecting layer or layers, but in whole or in part in the substrates themselves. In the case of a rectangular cross section, this can lead to an enlargement of the Lumens drove. A practical limit is set by the mechanical behavior of the substrates (bending under thermal stress, warp).
- oxide coverage can be dispensed with at least in one of the two wafers to be joined.
- the natural oxide that is always present on air-exposed wafers serves as the bonding surface.
- the buried insulation layer is freely accessible before the two wafers are joined to form the BESOI composite.
- it is also accessible for structuring the bonding oxide.
- One or both wafers in this case carry a SiO 2 layer which is typically about 1 ⁇ m thick.
- trenches are etched into one or both oxides, the edge of the wafer carrying a coherent, ring-shaped oxide region.
- the two wafers are then thermally bonded together as usual, and one of the two wafers is thinned to the desired wear layer thickness using one of the conventional thinning methods described in the BESOI technique (grinding, etching, IonCut).
- Circuits are then manufactured on this BESOI wafer using the usual technology.
- the edge of the wafer is hermetically sealed by the oxide ring.
- the buried oxide layer in particular the channels present in the oxide, is laterally accessible from the edge layer or also from the separation of the wafer into chips.
- An etchant for example hydrofluoric acid, can penetrate these channels and etch the connecting oxide.
- the detachment of the thin chip which is preferably fixed beforehand with the front on a holding substrate for mechanical support, typically takes place in the minute range at edge lengths of approximately 10 mm.
- the replacement is an inexpensive, wet chemical process that hardly endangers the chip and the added value integrated on it.
- the control of the layer thickness when thinning the BESOI wafer can be done particularly easily and locally resolved by means of acoustic microscopy due to the presence of the buried cavities (trenches).
- the IonCut technology can be used, which avoids grinding and layer thickness measurement.
- connection layer has an advantageous effect on the bonding process. It is known that superficially scratched wafers bond better. This is attributed to the easier diffusion of residual gases, adsorbed moisture, etc. during the beginning bonding process, for which the presence of water (hydrophilic surface) is advantageous.
- the edge of the wafer or possibly also different sub-areas are preferably free of laterally continuous channels. This is shown in Fig. 2b as well as in Fig. 3 clearly.
- the wafer should be hermetically sealed after bonding and should tolerate all processes used in the manufacture of semiconductor components.
- the BESOI bonding can be carried out under vacuum, or also under special oxidizing or reducing atmospheres.
- the bonding process is carried out with the addition of trace gases, in particular helium.
- trace gases in particular helium.
- the enclosed gas can be used, for example, to carry out a particularly simple leak test (helium leak test) of the connected wafers.
- doping gases are included to produce a highly doped, buried layer or a gettering layer.
- the essential feature of the lateral accessibility of the insulating oxide layer can also be used to metallize the internal surfaces of the channels by means of a liquid or a gaseous metal compound, in particular organometallic compounds.
- the invention is based on
- FIG. 1 schematically shows an example of a flow diagram of the manufacturing process according to the invention
- FIG. 2 examples of the structuring of the connection layers on the substrate surface
- FIG. 3 shows a further example of the structuring and examples of the cross-sectional shape of the channel-shaped depressions on the connecting surfaces of the substrates.
- FIG. 1 An example of a flow chart of the entire manufacturing process is shown in FIG. 1.
- two wafers (1, 2), each carrying an oxide layer (3, 4) on one surface are provided.
- the oxide layer (4) of one of the wafers is structured in such a way that strip-shaped channels (5) are formed which extend over the entire surface.
- the structures are transferred into the oxide (4) by one or two preferably unadjusted photo techniques.
- the two wafers are connected to their oxidized surfaces, preferably by SFB (silicon fusion bonding), as shown in FIGS. 1 a and 1 b.
- a process follows as in BESOI production, in which the wafer stack created by the bonding is thinned from the back of one of the substrates to the desired thickness of the semiconductor region (la) (FIG. 1c).
- the normal IC process for example a CMOS process, for producing circuits and / or individual components (6) can be carried out in the semiconductor layer (la) of the thinned substrate (1) (FIG. 1d).
- This is followed, as shown in Fig. Le, dry etching or wet etching of trenches (7) for later separation of the chips, the trenches, however, being much narrower than conventional, mechanically generated sawing lines.
- the trenches (7) extend to the buried, structured oxide layer (4). Mechanical sawing of the trenches is also possible.
- the surface of the ICs (6) must be protected during this etching process. This is done by applying a layer (8) made of nitride or photoresist, for example. This protective layer (8) can then either be removed again or remains as a protective layer for the detachment process of the chips. If the layer (8) is removed beforehand, a new protective layer (10), preferably made of photoresist, must be applied before the detachment process, as shown in Fig. If.
- the channels (5) in the buried oxide layer (4) were exposed (FIG. Le), so that in the subsequent detachment process, which is preferably carried out with HF, the etching liquid penetrates into the channels (5) and the individual chips (9) can detach from below, as can be seen from FIG.
- the selectivity from oxide to silicon is used during the etching.
- the wafer can be mechanically supported by a handling wafer before it is detached from the front.
- this handling wafer should have corresponding channels for introducing the etching liquid.
- the separated, fully processed chips (9) can subsequently be applied to a carrier (11) (FIG. 1g).
- FIG. 2a shows the wafers used in a top view and in cross section.
- Both wafers (1, 2) carry an approximately 1 ⁇ m thick Si0 2 layer (3, 4), which is structured with typical line widths (s, b) of approximately 1-2 ⁇ m.
- the output wafer (1) is also shown on the right side of the figure before the structuring.
- the structure of the layer is wet-chemical and unadjusted, so it can be carried out inexpensively. Restrictions in the structure and orientation of these Si0 trenches or channels can result from the anisotropic mechanical properties of the crystalline wafers (wafer deflection).
- the layers on both Si wafers (1, 2) are structured in such a way that the trenches run at an angle of 90 ° to one another after the wafers have been joined together.
- a better distribution of the etching liquid can be achieved in the subsequent detachment process.
- two different trench structures were chosen for illustration.
- FIG. 2b finally shows a modification of the structure of the two layers of the wafers. Stayed here the layers in the edge region of the wafers are each unstructured, so that a hermetically sealed wafer stack is present after the wafers have been connected.
- the geometrical design of the channels (5) in particular the shape of the lateral course, the division into mutually hermetically sealed areas, the formation of bonding islands, etc., is completely free.
- Exemplary shapes of the channels (5) in the two substrates are rectangular structures, round, meandering or polygonal structures.
- the structure should offer the silicon membrane (la) maximum mechanical stability and, on the other hand, it should make the removal process as simple and quick as possible. This means that the etching liquid should penetrate as homogeneously as possible at all points after penetrating into the channels (5) and should ensure a rapid detachment of the ICs.
- the distances between the channels are also variable. Examples of different cross Sectional shapes of the channels (5) are shown in FIG. 3, wherein the structuring can also take place into the substrate itself.
- connection layer can be structured in the form of an island, or it can be in the form of a strip or a point.
- 3 shows an in-soap structure in the form of a lattice structure (right side: unstructured layer; left side: structured layer).
- the island-shaped structuring has the advantage that mechanical stresses in the wafer are avoided. Continuous stripes as channels have a greater influence than an island-shaped connection layer.
- the cross section through the channels can also be viewed from the above points of view, i.e. mechanical stability and rapid detachment of the ICs.
- Either the surfaces of the two wafers or substrates to be connected can be structured or only one. To better connect the two wafers, both should have an oxide layer. However, this is not absolutely necessary.
- doped oxides can also be used as materials for the connecting layers, in particular the PSG, TEOS, PECVD, LPCVD, APCVD and BPSG oxides used in CMOS processes. As a result, the etching speed during chip detachment can be increased.
- Anodic oxidation can also be used as a process variant for separating or detaching, in particular in the case of silicon wafers. An electrical voltage is applied to both silicon wafers or layers connected via the insulator layer, which leads to a current and to an electrolytic decomposition of the electrodes by means of anodic oxidation. The compound oxide is infiltrated, and the volume increase in the oxide formation results in a detachment and separation of the two silicon partial wafers.
- the bond strength of wafers structured according to the invention is reduced by the reduced bond area. While the normal bond strength of conventional
- BESOI wafers is> 800 kp / cm 2 , it is still about 200 kp / cm 2 in the lattice structure given in FIG. 3 due to the bond area factor reduced to 25%. In any case, this is sufficient to withstand the thermal stresses during further processing (thermal budget of chip production) and also the expansion pressure of the gas enclosed during bonding (max. 4 bar at 1200 K).
- a channel web width (pitch) of typically 1 ⁇ m does not lead to any disturbing local or global bending with a useful thickness of the silicon of typically 10 ⁇ m.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99939373A EP1090422A1 (de) | 1998-06-22 | 1999-06-22 | Verfahren zur fertigung von dünnen substratschichten |
JP2000556397A JP2002519847A (ja) | 1998-06-22 | 1999-06-22 | 薄い基層の製造方法 |
US09/720,154 US6417075B1 (en) | 1998-06-22 | 1999-06-22 | Method for producing thin substrate layers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19827717 | 1998-06-22 | ||
DE19827717.2 | 1998-06-22 |
Publications (1)
Publication Number | Publication Date |
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WO1999067820A1 true WO1999067820A1 (de) | 1999-12-29 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/DE1999/001826 WO1999067820A1 (de) | 1998-06-22 | 1999-06-22 | Verfahren zur fertigung von dünnen substratschichten |
Country Status (5)
Country | Link |
---|---|
US (1) | US6417075B1 (de) |
EP (1) | EP1090422A1 (de) |
JP (1) | JP2002519847A (de) |
DE (1) | DE19840421C2 (de) |
WO (1) | WO1999067820A1 (de) |
Families Citing this family (41)
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FR2848336B1 (fr) * | 2002-12-09 | 2005-10-28 | Commissariat Energie Atomique | Procede de realisation d'une structure contrainte destinee a etre dissociee |
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US7303645B2 (en) * | 2003-10-24 | 2007-12-04 | Miradia Inc. | Method and system for hermetically sealing packages for optics |
FR2861497B1 (fr) | 2003-10-28 | 2006-02-10 | Soitec Silicon On Insulator | Procede de transfert catastrophique d'une couche fine apres co-implantation |
US6955988B2 (en) * | 2003-12-04 | 2005-10-18 | Analog Devices, Inc. | Method of forming a cavity and SOI in a semiconductor substrate |
DE102004010956B9 (de) * | 2004-03-03 | 2010-08-05 | Infineon Technologies Ag | Halbleiterbauteil mit einem dünnen Halbleiterchip und einem steifen Verdrahtungssubstrat sowie Verfahren zur Herstellung und Weiterverarbeitung von dünnen Halbleiterchips |
US7064045B2 (en) * | 2004-08-30 | 2006-06-20 | Miradia Inc. | Laser based method and device for forming spacer structures for packaging optical reflection devices |
US7344956B2 (en) * | 2004-12-08 | 2008-03-18 | Miradia Inc. | Method and device for wafer scale packaging of optical devices using a scribe and break process |
EP1848897A1 (de) * | 2005-02-15 | 2007-10-31 | Aktiebolaget SKF (publ) | Eine codierung tragende vorrichtung und drehmaschine |
US7349140B2 (en) * | 2005-05-31 | 2008-03-25 | Miradia Inc. | Triple alignment substrate method and structure for packaging devices |
US7265027B2 (en) * | 2005-06-14 | 2007-09-04 | Miradia Inc. | Bond method and structure using selective application of spin on glass |
FR2889887B1 (fr) | 2005-08-16 | 2007-11-09 | Commissariat Energie Atomique | Procede de report d'une couche mince sur un support |
FR2891281B1 (fr) | 2005-09-28 | 2007-12-28 | Commissariat Energie Atomique | Procede de fabrication d'un element en couches minces. |
FR2895420B1 (fr) * | 2005-12-27 | 2008-02-22 | Tracit Technologies Sa | Procede de fabrication d'une structure demontable en forme de plaque, en particulier en silicium, et application de ce procede. |
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FR2910179B1 (fr) | 2006-12-19 | 2009-03-13 | Commissariat Energie Atomique | PROCEDE DE FABRICATION DE COUCHES MINCES DE GaN PAR IMPLANTATION ET RECYCLAGE D'UN SUBSTRAT DE DEPART |
FR2913081B1 (fr) | 2007-02-27 | 2009-05-15 | Skf Ab | Dispositif de poulie debrayable |
FR2925221B1 (fr) | 2007-12-17 | 2010-02-19 | Commissariat Energie Atomique | Procede de transfert d'une couche mince |
TWI411125B (zh) * | 2008-03-05 | 2013-10-01 | Advanced Optoelectronic Tech | 三族氮化合物半導體發光元件之製造方法及其結構 |
DE102008060275B4 (de) * | 2008-12-03 | 2012-10-31 | Austriamicrosystems Ag | Verfahren zum Strukturieren eines gebondeten Wafers |
JP4819139B2 (ja) * | 2009-02-06 | 2011-11-24 | 株式会社沖データ | 半導体薄膜の製造方法及び半導体装置の製造方法 |
JP5527999B2 (ja) * | 2009-04-06 | 2014-06-25 | キヤノン株式会社 | 半導体装置の製造方法 |
JP5550252B2 (ja) * | 2009-04-06 | 2014-07-16 | キヤノン株式会社 | 半導体装置の製造方法 |
JP5528000B2 (ja) * | 2009-04-06 | 2014-06-25 | キヤノン株式会社 | 半導体装置の製造方法 |
FR2947098A1 (fr) | 2009-06-18 | 2010-12-24 | Commissariat Energie Atomique | Procede de transfert d'une couche mince sur un substrat cible ayant un coefficient de dilatation thermique different de celui de la couche mince |
US11315789B2 (en) | 2019-04-24 | 2022-04-26 | Tokyo Electron Limited | Method and structure for low density silicon oxide for fusion bonding and debonding |
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- 1999-06-22 US US09/720,154 patent/US6417075B1/en not_active Expired - Fee Related
- 1999-06-22 WO PCT/DE1999/001826 patent/WO1999067820A1/de not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
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DE19840421C2 (de) | 2000-05-31 |
JP2002519847A (ja) | 2002-07-02 |
US6417075B1 (en) | 2002-07-09 |
DE19840421A1 (de) | 1999-12-23 |
EP1090422A1 (de) | 2001-04-11 |
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