WO2021166905A1 - 積層体及び剥離剤組成物 - Google Patents
積層体及び剥離剤組成物 Download PDFInfo
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- WO2021166905A1 WO2021166905A1 PCT/JP2021/005699 JP2021005699W WO2021166905A1 WO 2021166905 A1 WO2021166905 A1 WO 2021166905A1 JP 2021005699 W JP2021005699 W JP 2021005699W WO 2021166905 A1 WO2021166905 A1 WO 2021166905A1
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- 150000002576 ketones Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229940087305 limonene Drugs 0.000 description 1
- 235000001510 limonene Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- AUHZEENZYGFFBQ-UHFFFAOYSA-N mesitylene Substances CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 description 1
- 125000001827 mesitylenyl group Chemical group [H]C1=C(C(*)=C(C([H])=C1C([H])([H])[H])C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001800 methanetriyl group Chemical group C(*)(*)* 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 229940095102 methyl benzoate Drugs 0.000 description 1
- GXMIHVHJTLPVKL-UHFFFAOYSA-N n,n,2-trimethylpropanamide Chemical compound CC(C)C(=O)N(C)C GXMIHVHJTLPVKL-UHFFFAOYSA-N 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- WSGCRAOTEDLMFQ-UHFFFAOYSA-N nonan-5-one Chemical compound CCCCC(=O)CCCC WSGCRAOTEDLMFQ-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- YFSUTJLHUFNCNZ-UHFFFAOYSA-N perfluorooctane-1-sulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F YFSUTJLHUFNCNZ-UHFFFAOYSA-N 0.000 description 1
- IDISMEQKBNKWJX-UHFFFAOYSA-N phenol;pyridine Chemical compound C1=CC=NC=C1.OC1=CC=CC=C1 IDISMEQKBNKWJX-UHFFFAOYSA-N 0.000 description 1
- 229940044654 phenolsulfonic acid Drugs 0.000 description 1
- 229960005323 phenoxyethanol Drugs 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 125000001844 prenyl group Chemical group [H]C([*])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229960002317 succinimide Drugs 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- LYPVBFXTKUJYDL-UHFFFAOYSA-N sulfanium;trifluoromethanesulfonate Chemical compound [SH3+].[O-]S(=O)(=O)C(F)(F)F LYPVBFXTKUJYDL-UHFFFAOYSA-N 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- BSYVTEYKTMYBMK-UHFFFAOYSA-N tetrahydrofurfuryl alcohol Chemical compound OCC1CCCO1 BSYVTEYKTMYBMK-UHFFFAOYSA-N 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
- 125000005951 trifluoromethanesulfonyloxy group Chemical group 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 1
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted 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
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
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- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
- C08G65/38—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table 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
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
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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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted 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
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/748—Releasability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted 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
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted 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
- H01L21/6836—Wafer tapes, e.g. grinding or dicing support tapes
-
- 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
- H01L2221/68381—Details of chemical or physical process used for separating the auxiliary support from a device or wafer
Definitions
- the present invention relates to a laminate and a release agent composition.
- semiconductor wafers that have been integrated in a two-dimensional plane direction are required to have a semiconductor integration technology in which planes are further integrated (laminated) in a three-dimensional direction for the purpose of further integration.
- This three-dimensional lamination is a technique for integrating in multiple layers while connecting with a through silicon via (TSV: through silicon via).
- TSV through silicon via
- the unthinned semiconductor wafer (also simply referred to as a wafer here) is adhered to the support for polishing with a polishing device.
- the adhesion at that time is called temporary adhesion because it must be easily peeled off after polishing.
- This temporary bond must be easily removed from the support, and the thinned semiconductor wafer may be cut or deformed if a large force is applied to the removal so that such a situation does not occur. Easy to remove.
- performance is required to have high stress (strong adhesive force) in the plane direction during polishing and low stress (weak adhesive force) in the vertical direction during removal.
- a method by laser irradiation has been disclosed for such an adhesion and separation process (see, for example, Patent Documents 1 and 2), but with the recent further progress in the semiconductor field, peeling by laser irradiation has become possible. New technologies involved are always in demand.
- the present invention has been made in view of the above circumstances, and is excellent in heat resistance at the time of joining a support substrate and a semiconductor substrate, processing the back surface of the semiconductor substrate, mounting components, etc. It is an object of the present invention to provide a laminate having a peeling layer that can be easily peeled off by irradiating light at the time of peeling, and a release agent composition that provides a film suitable as such a peeling layer.
- the first substrate made of a semiconductor substrate
- the second substrate made of a light-transmitting support substrate
- the first substrate and the second substrate Obtained from a release agent composition containing a predetermined polynuclear phenol derivative, a cross-linking agent, and at least one of an acid generator and an acid as the release layer of the laminate provided with an adhesive layer and a release layer.
- a first substrate made of a semiconductor substrate and A second substrate made of a light-transmitting support substrate and An adhesive layer and a release layer are provided between the first substrate and the second substrate.
- the release layer is a film obtained from a release agent composition containing a polynuclear phenol derivative represented by the formula (P), a cross-linking agent, and at least one of an acid generator and an acid.
- the multi-nuclear phenol derivative is a laminate of 1 represented by the formula (P-1).
- the polynuclear phenol derivative is a laminate of 2 represented by the formula (P-1-1). 4.
- the polynuclear phenol derivative is a laminate of 3 represented by the formula (P1). 5.
- the cross-linking agent is at least one selected from a phenol-based cross-linking agent having a cross-linking group, a melamine-based cross-linking agent having a cross-linking group, a urea-based cross-linking agent having a cross-linking group, and a thiourea-based cross-linking agent having a cross-linking group.
- the cross-linking agent is a laminate of 5 containing a phenol-based cross-linking agent having a cross-linking group.
- the release agent composition is a laminate according to any one of 1 to 6 containing an acid. 8.
- the above acids are aryl sulfonic acid, salt of aryl sulfonic acid, aryl carboxylic acid, aryl carboxylic acid salt, chain or cyclic alkyl sulfonic acid, salt of chain or cyclic alkyl sulfonic acid, chain or cyclic alkyl carboxylic acid and chain.
- the adhesive layer contains at least one selected from silicone-based adhesives, acrylic resin-based adhesives, epoxy resin-based adhesives, polyamide-based adhesives, polystyrene-based adhesives, polyimide adhesives, and phenol-resin-based adhesives.
- an adhesive composition containing an agent component (S) contains a silicone-based adhesive
- Ar represents an arylene group.
- the polynuclear phenol derivative is a release agent composition of 13 represented by the formula (P-1-1). 15.
- the polynuclear phenol derivative is a release agent composition of 14 represented by the formula (P1). 16.
- the cross-linking agent is at least one selected from a phenol-based cross-linking agent having a cross-linking group, a melamine-based cross-linking agent having a cross-linking group, a urea-based cross-linking agent having a cross-linking group, and a thiourea-based cross-linking agent having a cross-linking group.
- the above acids are aryl sulfonic acid, salt of aryl sulfonic acid, aryl carboxylic acid, aryl carboxylic acid salt, chain or cyclic alkyl sulfonic acid, salt of chain or cyclic alkyl sulfonic acid, chain or cyclic alkyl carboxylic acid and chain.
- Eighteen release agent compositions comprising at least one selected from the shape or cyclic alkylcarboxylic acids, 20.
- the release layer of a laminate having an adhesive layer and a release layer between the first substrate made of a semiconductor substrate, the second substrate made of a light-transmitting support substrate, and the first substrate and the second substrate.
- the release layer of a laminate having an adhesive layer and a release layer between the first substrate made of a semiconductor substrate, the second substrate made of a light-transmitting support substrate, and the first substrate and the second substrate.
- the laminate of the present invention has a first substrate made of a semiconductor substrate, a second substrate made of a light-transmitting support substrate, and an adhesive layer and a release layer between the first substrate and the second substrate.
- the release layer is a film obtained from a release agent composition containing a predetermined polynuclear phenol derivative, a cross-linking agent, and at least one of an acid generator and an acid, and is irradiated with light from the second substrate side.
- the release layer absorbs the light irradiated through the second substrate and decomposes or deteriorates the quality. It is considered that such decomposition or alteration causes separation of the release layer at the interface between the release layer and the adhesive layer, the interface between the release layer and the support substrate, or inside the release layer.
- the processed wafer By irradiating the laser from the substrate side, the processed wafer can be easily separated, so that mechanical stress on the wafer can be avoided, and as a result, damage such as warpage and deformation of the wafer can be avoided.
- the release layer provided in the laminate of the present invention does not generate significant gas or generate a large amount of heat, which causes an adverse effect when the release layer exhibits the release ability, and the influence on the first substrate made of the semiconductor substrate is reduced. ing. Therefore, by using the laminate of the present invention, it is possible to expect the production of a more reliable semiconductor element.
- the release agent composition of the present invention contains a cross-linking agent, at least one of an acid generator and an acid, and a predetermined polynuclear phenol derivative exhibiting excellent solubility in an organic solvent, and a film obtained from the composition.
- the film obtained from the release agent composition of the present invention is provided as a release layer together with the adhesive layer between the first substrate made of a semiconductor substrate and the second substrate made of a light-transmitting support substrate. It is possible to obtain a laminate capable of peeling a semiconductor substrate or the like from a support substrate by light irradiation such as laser irradiation without applying an excessive load for peeling to a workpiece such as a support substrate or a semiconductor substrate.
- the release agent composition of the present invention is excellent in storage stability because discoloration or coloring with time is suppressed. Therefore, for example, it becomes possible to prepare a release agent composition in an amount larger than before, and as a result, efficient use of the production equipment becomes possible, so that the production cost of the release agent composition itself and the production cost thereof It is expected that the cost of semiconductor devices manufactured using the above will be reduced.
- the laminate of the present invention has a first substrate made of a semiconductor substrate, a second substrate made of a light-transmitting support substrate, and an adhesive layer and a release layer between the first substrate and the second substrate.
- the release layer is a film obtained from a release agent composition containing a polynuclear phenol derivative represented by the formula (P), a cross-linking agent, and at least one of an acid generator and an acid.
- Ar represents an arylene group having 6 to 60 carbon atoms.
- the first substrate made of a semiconductor substrate is, for example, a wafer, and specific examples thereof include, but are not limited to, a glass wafer having a diameter of about 300 mm and a thickness of about 770 ⁇ m, and a silicon wafer.
- the second substrate made of the support substrate is a support (carrier) joined to support the first substrate, and is not particularly limited as long as it has light transmission.
- a specific example thereof is a diameter of 300 mm.
- a glass wafer having a thickness of about 700 ⁇ m can be mentioned, but the present invention is not limited to this.
- the transmittance of the light-transmitting support substrate is usually 50% or more, preferably 60% or more, more preferably 70% or more, still more preferably 80% or more, still more preferably 90% or more.
- the light-transmitting support substrate is a substrate that transmits a laser, the wavelength of such a laser is typically 190 nm to 600 nm, but the lower limit is 250 nm in some embodiments and others.
- the laminate of the present invention can be suitably peeled off by a laser having a wavelength of 308 nm, 343 nm, 355 nm or 532 nm.
- the laminate of the present invention is formed between a first substrate made of a semiconductor substrate, a second substrate made of a light-transmitting support substrate, and a first substrate between the first substrate and the second substrate. It is provided with an adhesive layer provided so as to be in contact with the second substrate and a release layer provided so as to be in contact with the second substrate and the adhesive layer.
- the laminate of the present invention can be peeled from the light-transmitting second substrate side, for example, by irradiating the peeling layer with a laser without applying an excessive load for peeling.
- peeling means that the adhesive strength is lower than that of other parts, that is, the peelability is excellent and the peelable layer is easy to peel off. The adhesive strength is lower than before. That is, in the laminate of the present invention, for example, the first substrate made of a wafer has an adhesive layer and the second substrate made of a support substrate that transmits a laser while the wafer is thinned or the like.
- the release layer It is suitably supported via the release layer, and after the processing is completed, by irradiating the laser from the second substrate side, the laser transmitted through the second substrate is absorbed by the release layer, and the release layer and the adhesive layer are absorbed. Separation of the peeling layer occurs at the interface with, the interface between the peeling layer and the support, or inside the peeling layer, and as a result, suitable peeling can be realized without applying an excessive load for peeling.
- the release layer provided in the laminate of the present invention is composed of a release agent composition containing a polynuclear phenol derivative represented by the formula (P), a cross-linking agent, and at least one of an acid generator and an acid.
- P polynuclear phenol derivative represented by the formula (P)
- Ar represents an arylene group, and the number of carbon atoms thereof is not particularly limited, but is usually 6 to 60, and a release agent composition having excellent uniformity is prepared, and release with higher flatness is obtained. From the viewpoint of obtaining the layer with good reproducibility, it is preferably 30 or less, more preferably 20 or less, still more preferably 18 or less, still more preferably 12 or less.
- anthracene group examples include 1,2-phenylene, 1,3-phenylene, 1,4-phenylene; 1,5-naphthalenedyl, 1,8-naphthalenedyl, 2,6-naphthalenedyl, and the like.
- 2,7-Naphthalene diyl 1,2-anthracene diyl, 1,3-anthracene diyl, 1,4-anthracene diyl, 1,5-anthracene diyl, 1,6-anthracene diyl, 1,7-anthracene diyl, 1 , 8-anthracene diyl, 2,3-anthracene diyl, 2,6-anthracene diyl, 2,7-anthracene diyl, 2,9-anthracene diyl, 2,10-anthracene diyl, 9,10-anthracene diyl group, etc.
- Fused ring A group derived by removing two hydrogen atoms on the aromatic ring of an aromatic hydrocarbon compound a ring-linking ring such as a biphenyl-4,4'-diyl group or a paratelphenyl-4,4 "-diyl group. Examples thereof include, but are not limited to, groups derived by removing two hydrogen atoms on the aromatic ring of the aromatic hydrocarbon compound.
- the polynuclear phenol derivative represented by the formula (P) is preferably represented by the formula (P-1) from the viewpoint of obtaining a stripped layer exhibiting good peelability and a laminate in which the supporting substrate can be separated well with good reproducibility. It is a polynuclear phenol derivative represented, more preferably a polynuclear phenol derivative represented by the formula (P-1-1), and even more preferably a polynuclear phenol derivative represented by the formula (P1).
- the release agent composition contains a cross-linking agent.
- a cross-linking agent is not particularly limited as long as they can cross-link with the above-mentioned polycyclic phenol derivative, but typically, a hydroxymethyl group, a methoxymethyl group, a butoxymethyl group, or the like.
- examples thereof include phenol-based cross-linking agents, melamine-based cross-linking agents, urea-based cross-linking agents, thiourea-based cross-linking agents, etc., which have a cross-linking group such as an alkoxymethyl group in the molecule. It may be a polymer compound.
- the cross-linking agent contained in the release agent composition usually has two or more cross-linking groups, but from the viewpoint of achieving more suitable curing with good reproducibility, the number of cross-linking groups contained in the compound which is the cross-linking agent. Is preferably 2 to 10, more preferably 2 to 6.
- the cross-linking agent contained in the release agent composition preferably has an aromatic ring (for example, a benzene ring or a naphthalene ring) in the molecule from the viewpoint of achieving higher heat resistance, and is a typical example of such a cross-linking agent. Examples thereof include, but are not limited to, a phenolic cross-linking agent.
- the phenolic cross-linking agent having a cross-linking group is a compound having a cross-linking group bonded to an aromatic ring and having at least one of a phenolic hydroxyl group and an alkoxy group derived from the phenolic hydroxyl group.
- alkoxy group derived from the phenolic hydroxyl group include, but are not limited to, a methoxy group and a butoxy group.
- the aromatic ring to which the crosslink-forming group is bonded and the aromatic ring to which the phenolic hydroxyl group and / or the alkoxy group derived from the phenolic hydroxyl group are bonded are not limited to a non-condensed aromatic ring such as a benzene ring, but a naphthalene ring. , Anthracene or the like may be a fused ring type aromatic ring.
- the cross-linking group and the phenolic hydroxyl group and the alkoxy group derived from the phenolic hydroxyl group may be bonded to the same aromatic ring in the molecule.
- the aromatic ring to which the cross-linking group or the phenolic hydroxyl group and the alkoxy group derived from the phenolic hydroxyl group are bonded is an alkyl group such as a methyl group, an ethyl group or a butyl group, a hydrocarbon group such as an aryl group such as a phenyl group, or fluorine. It may be further substituted with a halogen atom such as an atom.
- phenolic cross-linking agent having a cross-linking group examples include compounds represented by any of the formulas (L1) to (L4).
- each R'independently represents a fluorine atom, an aryl group or an alkyl group
- each R'independently represents a hydrogen atom or an alkyl group
- L 1 and L 2 are each independently represents a single bond, a methylene group or propane-2,2-diyl group
- L 3 is Sadamari according to q1, single bond, a methylene group, propane-2,2-diyl group, methanetriyl group or Representing an ethane-1,1,1-triyl group
- t11, t12 and t13 are integers satisfying 2 ⁇ t11 ⁇ 5, 1 ⁇ t12 ⁇ 4, 0 ⁇ t13 ⁇ 3, and t11 + t12 + t13 ⁇ 6, and t21, t22 and t23 are integers satisfying 2 ⁇ t21 ⁇ 4, 1 ⁇ t22 ⁇ 3, 0 ⁇ t23 ⁇ 2, and t21 + t22 + t23 ⁇ 5,
- T31, t32 and t33 are integers satisfying 2 ⁇ t31 ⁇ 4, 1 ⁇ t32 ⁇ 3, 0 ⁇ t33 ⁇ 2 and t31 + t32 + t33 ⁇ 5, and t41, t42 and t43 are 2 ⁇ t41 ⁇ 3. , 1 ⁇ t42 ⁇ 2, 0 ⁇ t43 ⁇ 1, and t41 + t42 + t43 ⁇ 4, q1 is 2 or 3, q2 is an integer of 0 or more, and the above aryl group.
- Specific examples of the alkyl group include the same as the following specific examples, but the aryl group is preferably a phenyl group, and the alkyl group is preferably a methyl group or a t-butyl group.
- a melamine-based cross-linking agent having a cross-linking group is a melamine derivative in which at least one hydrogen atom of an amino group bonded to the triazine ring is replaced with a cross-linking group, 2,4-diamino-1,3,5-. It is a triazine derivative or a 2-amino-1,3,5-triazine derivative, and the triazine ring may further have a substituent such as an aryl group such as a phenyl group.
- melamine-based cross-linking agent having a cross-linking group examples include N, N, N', N', N ", N" -hexakis (methoxymethyl) melamine, N, N, N', N', N ".
- N "-mono such as hexax (butoxymethyl) melamine, bis, tris, tetrax, pentax or hexaxalkoxymethyl melamine, N, N, N', N'-tetrax (methoxymethyl) benzoguanamine, N, N, N Examples include, but are not limited to, mono such as', N'-tetrakis (butoxymethyl) benzoguanamine, bis, tris or tetrakisalkoxymethylbenzoguanamine.
- the urea-based cross-linking agent having a cross-linking group is a derivative of a urea bond-containing compound and has a structure in which at least one hydrogen atom of an NH group constituting a urea bond is substituted with a cross-linking group.
- Specific examples of the urea-based cross-linking agent having a cross-linking group include mono, such as 1,3,4,6-tetrakis (methoxymethyl) glycoluril and 1,3,4,6-tetrakis (butoxymethyl) glycoluryl.
- Examples thereof include monos such as bis, tris or tetrakisalkoxymethyl glycol uryl, 1,3-bis (methoxymethyl) urea, 1,1,3,3-tetrakismethoxymethylurea, bis, tris or tetrakisalkoxymethylurea. , Not limited to these.
- the thiourea-based cross-linking agent having a cross-linking group is a derivative of a thiourea bond-containing compound having a structure in which at least one hydrogen atom of the NH group constituting the thiourea bond is substituted with a cross-linking group.
- Specific examples of the thiourea-based cross-linking agent having a cross-linking group include mono, bis, tris or tetrakisalkoxy such as 1,3-bis (methoxymethyl) thiourea and 1,1,3,3-tetrakismethoxymethylthiourea. Examples thereof include, but are not limited to, methylthiourea.
- the amount of the cross-linking agent contained in the release agent composition varies depending on the coating method to be adopted, the desired film thickness, and the like, and therefore cannot be unconditionally specified, but is usually 0.001 to 80% by mass with respect to the film constituents. From the viewpoint of achieving suitable curing and obtaining a laminate in which the support substrate can be separated well with good reproducibility, it is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably. Is 0.5% by mass or more, more preferably 1.0% by mass or more, preferably 50% by mass or less, more preferably 40% by mass or less, still more preferably 20% by mass or less, still more preferably 10% by mass. It is as follows.
- the film constituent component means a component other than the solvent contained in the composition.
- the cross-linking agent contained in the release agent composition may undergo a cross-linking reaction by self-condensation between the cross-linking agents, but the cross-linking reaction with the polycyclic phenol derivative contained in the composition finally constitutes a cured film. ..
- the release agent composition contains at least one of an acid generator and an acid.
- the acid generator and the acid promote the cross-linking reaction and contribute to obtaining a suitable cured film with good reproducibility.
- thermoacid generator examples include a thermoacid generator and a photoacid generator.
- the thermoacid generator is not particularly limited as long as it generates an acid by heat, and specific examples thereof include 2,4,4,6-tetrabromocyclohexadienone, benzointosylate, and 2-nitrobenzyltosi.
- photoacid generator examples include onium salt compounds, sulfonimide compounds, disulfonyldiazomethane compounds and the like.
- the onium salt compound examples include diphenyliodonium hexafluorosulfonate, diphenyliodonium trifluoromethanesulfonate, diphenyliodonium nonafluoronormal butane sulfonate, diphenyliodonium perfluoronormal octane sulfonate, diphenyliodonium camphor sulfonate, and bis (4-tert-butyl).
- Iodonium salt compounds such as phenyl) iodonium camphor sulfonate, bis (4-tert-butylphenyl) iodonium trifluoromethane sulfonate, triphenyl sulfonium hexafluoroantimonate, triphenyl sulfonium nonafluoronormal butane sulfonate, triphenyl sulfonium camphor sulfonate, triphenyl Examples thereof include, but are not limited to, sulfonium salt compounds such as sulfonium trifluoromethane sulfonate.
- sulfoneimide compound examples include N- (trifluoromethanesulfonyloxy) succinimide, N- (nonafluoronormal butanesulfonyloxy) succinimide, N- (kanfersulfonyloxy) succinimide, and N- (trifluoromethanesulfonyloxy) naphthalimide. Etc., but are not limited to these.
- disulfonyldiazomethane compound examples include bis (trifluoromethylsulfonyl) diazomethane, bis (cyclohexylsulfonyl) diazomethane, bis (phenylsulfonyl) diazomethane, bis (p-toluenesulfonyl) diazomethane, and bis (2,4-dimethylbenzene).
- Sulfonyl) Diazomethane, methylsulfonyl-p-toluenesulfonyldiazomethane and the like can be mentioned, but the present invention is not limited thereto.
- the acid examples include p-toluene sulfonic acid, pyridinium p-toluene sulfonic acid (pyridinium paratoluene sulfonate), pyridinium phenol sulfonic acid, 5-sulfosalicylic acid, 4-phenol sulfonic acid, 4-chlorobenzene sulfonic acid, and benzene disulfon.
- aryl sulfonic acids such as 1-naphthalene sulfonic acid, pyridinium salts and their salts, salicylic acid, benzoic acid, hydroxybenzoic acid, arylcarboxylic acids such as naphthalene carboxylic acid and their salts, trifluoromethanesulfonic acid, camphorsulfonic acid and the like.
- examples thereof include, but are not limited to, chain or cyclic alkyl sulfonic acids and salts thereof, and chain or cyclic alkyl carboxylic acids such as citric acid and salts thereof.
- the amounts of the acid generator and the acid contained in the release agent composition cannot be unconditionally specified because they differ depending on the type of the cross-linking agent used together, the heating temperature, etc., but are usually 0.01 mass by mass with respect to the film constituents.
- the release agent composition may contain a solvent for the purpose of adjusting the viscosity and the like.
- a solvent for example, a highly soluble solvent capable of satisfactorily dissolving components such as a polynuclear phenol derivative can be used, and if necessary, a low-polarity solvent for the purpose of adjusting viscosity, surface tension, etc. May be used.
- a low-polarity solvent is defined as a solvent having a relative permittivity of less than 7 at a frequency of 100 kHz
- a high-polarity solvent is defined as a solvent having a relative permittivity of 7 or more at a frequency of 100 kHz.
- the solvent can be used alone or in combination of two or more.
- Examples of the highly polar solvent include N, N-dimethylformamide, N, N-dimethylacetamide, N, N-dimethylisobutylamide, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone and the like.
- Amido-based solvent such as ethylmethylketone, isophorone, cyclohexanone; Cyano-based solvent such as acetonitrile and 3-methoxypropionitrile; Ethylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, 1,3-butanediol , 2,3-Butanediol and other polyhydric alcohol solvents; propylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monophenyl ether, triethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, benzyl alcohol, 2-phenoxyethanol, 2- Monohydric alcohol solvents other than aliphatic alcohols such as benzyloxyethanol, 3-phenoxybenzyl alcohol and tetrahydrofurfuryl alcohol; sulfoxide solvents such as dimethyl sulfoxide and the like can be mentioned.
- low polar solvent examples include chlorine-based solvents such as chloroform and chlorobenzene; aromatic hydrocarbon-based solvents such as alkylbenzene such as toluene, xylene, tetraline, cyclohexylbenzene and decylbenzene; 1-octanol, 1-nonanol and 1-.
- Aliper alcohol solvents such as decanol; tetrahydrofuran, dioxane, anisole, 4-methoxytoluene, 3-phenoxytoluene, dibenzyl ether, diethylene glycol dimethyl ether, diethylene glycol butyl methyl ether, triethylene glycol dimethyl ether, triethylene glycol butyl methyl ether, etc.
- Ether solvent methyl benzoate, ethyl benzoate, butyl benzoate, isoamyl benzoate, bis (2-ethylhexyl) phthalate, dibutyl maleate, dibutyl oxalate, hexyl acetate, propylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether Examples thereof include ester solvents such as acetate and diethylene glycol monobutyl ether acetate.
- the release agent composition contains a solvent
- the content thereof is appropriately set in consideration of the viscosity of the desired composition, the coating method to be adopted, the thickness of the thin film to be produced, and the like, but the entire composition. It is 99% by mass or less of.
- the viscosity and surface tension of the release agent composition can be appropriately adjusted by changing the types of organic solvents used, their ratios, the concentration of film constituents, etc., in consideration of various factors such as the coating method to be used and the desired film thickness. It will be adjusted.
- the release agent composition contains a solvent.
- the amount is 80 to 99% by mass with respect to the whole composition, that is, the amount of the film constituents in that case is 1 to 20% by mass with respect to the whole composition.
- the release agent composition contains a glycol-based solvent.
- glycol-based solvent as used herein is a general term for glycols, glycol monoethers, glycol diethers, glycol monoesters, glycol diesters, and glycol ester ethers.
- R G1 each independently represents a linear or branched alkylene group having a carbon number of 2 ⁇ 4
- R G2 and R G3 are each independently a hydrogen atom, a linear or A branched alkyl group having 1 to 8 carbon atoms or an alkyl acyl group in which the alkyl portion is a linear or branched alkyl group having 1 to 8 carbon atoms is represented, and ng is an integer of 1 to 6.
- linear or branched alkylene group having 2 to 4 carbon atoms include an ethylene group, a trimethylene group, a 1-methylethylene group, a tetramethylene group, a 2-methylpropane-1,3-diyl group, and a pentamethylene group. Groups, hexamethylene groups, etc., but are not limited thereto. Among them, the number of carbon atoms is 2 from the viewpoint of obtaining a composition having high uniformity with good reproducibility, obtaining a composition having high storage stability with good reproducibility, and obtaining a composition giving a thin film having high uniformity with good reproducibility.
- a linear or branched alkylene group having 3 to 3 is preferable, and a linear or branched alkylene group having 3 carbon atoms is more preferable.
- linear or branched alkyl groups having 1 to 8 carbon atoms include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group and s-butyl.
- the methyl group from the viewpoint of obtaining a composition having high uniformity with good reproducibility, obtaining a composition having high storage stability with good reproducibility, obtaining a composition giving a thin film with high uniformity with good reproducibility, etc.
- An ethyl group is preferable, and a methyl group is more preferable.
- linear or branched alkyl group having 1 to 8 carbon atoms in the alkyl acyl group in which the alkyl portion is a linear or branched alkyl group having 1 to 8 carbon atoms are the same as those described above.
- a methylcarbonyl group from the viewpoint of obtaining a composition having high uniformity with good reproducibility, obtaining a composition having high storage stability with good reproducibility, obtaining a composition giving a thin film with high uniformity with good reproducibility, and the like.
- Ethylcarbonyl group is preferable, and methylcarbonyl group is more preferable.
- ng is preferably from the viewpoint of obtaining a composition having high uniformity with good reproducibility, obtaining a composition having high storage stability with good reproducibility, obtaining a composition giving a thin film with high uniformity with good reproducibility, and the like. Is 4 or less, more preferably 3 or less, even more preferably 2 or less, and most preferably 1.
- At least one of RG2 and RG3 is a linear or branched alkyl group having 1 to 8 carbon atoms, and more preferably one of RG2 and RG3 is linear.
- it is a branched alkyl group having 1 to 8 carbon atoms, and the other is an alkyl acyl group in which a hydrogen atom or an alkyl portion is a linear or branched alkyl group having 1 to 8 carbon atoms.
- the amount is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably, with respect to the solvent contained in the release agent composition. It is preferably 95% by mass or more.
- the release agent composition from the viewpoint of obtaining a composition having high uniformity with good reproducibility, obtaining a composition having high storage stability with good reproducibility, obtaining a composition giving a thin film with high uniformity with good reproducibility, and the like.
- the membrane constituents are uniformly dispersed or dissolved in the solvent, preferably dissolved.
- the release agent composition can be produced by mixing a polynuclear phenol derivative represented by the formula (P), a cross-linking agent, an acid generator and / or an acid, and a solvent when used.
- the mixing order is not particularly limited, but as an example of a method capable of easily and reproducibly producing a release agent composition, a polynuclear phenol derivative represented by the formula (P), a cross-linking agent, and an acid generator are used. And / or a method of dissolving the acid in a solvent at once, a polynuclear phenol derivative represented by the formula (P), a cross-linking agent, an acid generator and / or a part of the acid is dissolved in the solvent, and the rest is separately dissolved in the solvent.
- Examples include, but are not limited to, methods of dissolving and mixing the resulting solutions.
- it may be appropriately heated as long as the components are not decomposed or deteriorated.
- filtration may be performed using a filter on the order of submicrometers or the like during the production of the release agent composition or after mixing all the components.
- the thickness of the release layer included in the laminate of the present invention is usually 10 nm to 10 ⁇ m.
- the release agent composition described above is also the subject of the present invention, and related conditions (suitable conditions, production conditions, etc.) are as described above.
- a film suitable for a release layer that can be used for producing a semiconductor element can be produced with good reproducibility.
- the adhesive layer provided in the laminate of the present invention can be, for example, a film obtained from an adhesive composition containing an adhesive component (S).
- an adhesive component (S) is not particularly limited as long as it is used for this kind of application, and is, for example, a silicone-based adhesive, an acrylic resin-based adhesive, an epoxy resin-based adhesive, or a polyamide. Examples thereof include, but are not limited to, based adhesives, polystyrene adhesives, polyimide adhesives, and phenol resin adhesives.
- a silicone-based adhesive is used as the adhesive component (S) because it exhibits suitable adhesive ability during processing of wafers and the like, can be preferably peeled off after processing, and has excellent heat resistance. Is preferable.
- the adhesive composition used in the present invention contains, as an adhesive component, a polyorganosiloxane component (A) that is cured by a hydrosilylation reaction, and in a more preferred example, a poly that is cured by a hydrosilylation reaction.
- organosiloxane component (A) siloxane units (Q units) represented by SiO 2, siloxane units (M units) represented by R 1 R 2 R 3 SiO 1/2 , R 4 R 5 SiO 2/2
- Polysiloxane (A1) containing one or more units selected from the group consisting of the siloxane unit (D unit) represented by and the siloxane unit (T unit) represented by R 6 SiO 3/2.
- the polysiloxane (A1) is siloxane unit (Q 'units), R 1' represented by SiO 2 represented by R 2 'R 3' SiO 1/2 that the siloxane units (M 'units), R 4' from R 5 'siloxane units (D represented by SiO 2/2' units) and R 6 'siloxane units (T represented by SiO 3/2' units)
- Polyorganosiloxane (a1) containing one or more units selected from the group consisting of at least one selected from the group consisting of M'units, D'units and T'units, and SiO 2 Represented by siloxane unit (Q "unit) represented by, R 1 " R 2 "R 3 " SiO 1/2 siloxane unit (M "unit), R 4 " R 5 "SiO 2/2
- R 1 to R 6 are groups or atoms bonded to a silicon atom, and independently represent an alkyl group, an alkenyl group or a hydrogen atom.
- R 1 ' ⁇ R 6' is a group bonded to the silicon atoms, each independently, represent an alkyl group or an alkenyl group, at least one of R 1 ' ⁇ R 6' is an alkenyl group.
- R 1 "to R 6 " are groups or atoms bonded to a silicon atom and independently represent an alkyl group or a hydrogen atom, but at least one of R 1 "to R 6 " is a hydrogen atom. be.
- the alkyl group may be linear, branched or cyclic, but a linear or branched alkyl group is preferable, and the number of carbon atoms thereof is not particularly limited, but is usually 1 to 40. Yes, preferably 30 or less, more preferably 20 or less, even more preferably 10 or less.
- linear or branched alkyl group examples include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, an s-butyl group, and a t-butyl group.
- N-pentyl group 1-methyl-n-butyl group, 2-methyl-n-butyl group, 3-methyl-n-butyl group, 1,1-dimethyl-n-propyl group, 1,2-dimethyl- n-propyl group, 2,2-dimethyl-n-propyl group, 1-ethyl-n-propyl group, n-hexyl, 1-methyl-n-pentyl group, 2-methyl-n-pentyl group, 3-methyl -N-pentyl group, 4-methyl-n-pentyl group, 1,1-dimethyl-n-butyl group, 1,2-dimethyl-n-butyl group, 1,3-dimethyl-n-butyl group, 2, 2-Dimethyl-n-butyl group, 2,3-dimethyl-n-butyl group, 3,3-dimethyl-n-butyl group, 1-ethyl-n-butyl group, 2-ethyl-n-butyl group, 1-e
- cyclic alkyl group examples include cyclopropyl group, cyclobutyl group, 1-methyl-cyclopropyl group, 2-methyl-cyclopropyl group, cyclopentyl group, 1-methyl-cyclobutyl group, 2-methyl-cyclobutyl group, 3 -Methyl-cyclobutyl group, 1,2-dimethyl-cyclopropyl group, 2,3-dimethyl-cyclopropyl group, 1-ethyl-cyclopropyl group, 2-ethyl-cyclopropyl group, cyclohexyl group, 1-methyl-cyclopentyl Group, 2-methyl-cyclopentyl group, 3-methyl-cyclopentyl group, 1-ethyl-cyclobutyl group, 2-ethyl-cyclobutyl group, 3-ethyl-cyclobutyl group, 1,2-dimethyl-cyclobutyl group, 1,3- Dimethyl-cyclobutyl group, 2,2-dimethyl-cyclobut
- the alkenyl group may be in the form of a linear chain or a branched chain, and the number of carbon atoms thereof is not particularly limited, but is usually 2 to 40, preferably 30 or less, more preferably 20 or less, and further. It is preferably 10 or less.
- alkenyl group examples include ethenyl group, 1-propenyl group, 2-propenyl group, 1-methyl-1-ethenyl group, 1-butenyl group, 2-butenyl group, 3-butenyl group and 2-methyl-1.
- -Propenyl group 2-methyl-2-propenyl group, 1-ethylethenyl group, 1-methyl-1-propenyl group, 1-methyl-2-propenyl group, 1-pentenyl group, 2-pentenyl group, 3-pentenyl group , 4-Pentenyl group, 1-n-propylethenyl group, 1-methyl-1-butenyl group, 1-methyl-2-butenyl group, 1-methyl-3-butenyl group, 2-ethyl-2-propenyl group , 2-Methyl-1-butenyl group, 2-methyl-2-butenyl group, 2-methyl-3-butenyl group, 3-methyl-1-butenyl group, 3-methyl-2-butenyl group, 3-methyl-2-butenyl group, 3-methyl- 3-butenyl group, 1,1-dimethyl-2-propenyl group, 1-i-propylethenyl group, 1,2-dimethyl-1-propenyl group, 1,2-dimethyl-2-propenyl
- the polysiloxane (A1) contains the polyorganosiloxane (a1) and the polyorganosiloxane (a2), but is contained in the alkenyl group contained in the polyorganosiloxane (a1) and the polyorganosiloxane (a2).
- a hydrogen atom (Si—H group) forms a crosslinked structure by a hydrosilylation reaction with a platinum group metal-based catalyst (A2) and is cured.
- the polyorganosiloxane (a1) contains one or more units selected from the group consisting of Q'units, M'units, D'units and T'units, and the M'units, D'units and the above-mentioned M'units and D'units. It contains at least one selected from the group consisting of T'units.
- the polyorganosiloxane (a1) two or more types of polyorganosiloxane satisfying such conditions may be used in combination.
- Preferred combinations of two or more selected from the group consisting of Q'units, M'units, D'units and T'units are (Q'units and M'units), (D'units and M'units), (T'unit and M'unit), (Q'unit and T'unit and M'unit), but are not limited thereto.
- the polyorganosiloxane (a2) contains one or more units selected from the group consisting of Q “units, M” units, D “units and T” units, as well as the above M “units, D” units and It contains at least one selected from the group consisting of T "units.
- the polyorganosiloxane (a2) two or more polyorganosiloxanes satisfying such conditions may be used in combination.
- Preferred combinations of two or more selected from the group consisting of Q “units, M” units, D “units and T” units are (M “units and D” units), (Q “units and M” units), (Q “unit and T” unit and M “unit), but are not limited to these.
- Polyorganosiloxanes (a1) is one in which the alkyl group and / or alkenyl groups is composed of siloxane units bonded to the silicon atoms, alkenyl during all the substituents represented by R 1 ' ⁇ R 6' proportion of group is preferably 0.1 mol% to 50.0 mol%, more preferably from 0.5 mol% to 30.0 mol%, the remaining R 1 ' ⁇ R 6' is an alkyl group be able to.
- the polyorganosiloxane (a2) is composed of a siloxane unit in which an alkyl group and / or a hydrogen atom is bonded to the silicon atom, and all the substituents and substitutions represented by R 1 "to R 6".
- the proportion of hydrogen atoms in the atom is preferably 0.1 mol% to 50.0 mol%, more preferably 10.0 mol% to 40.0 mol%, and the remaining R 1 "to R 6 " are. It can be an alkyl group.
- the polysiloxane (A1) contains a polyorganosiloxane (a1) and a polyorganosiloxane (a2), but in a preferred embodiment of the present invention, the alkenyl group and the polyorganosiloxane contained in the polyorganosiloxane (a1)
- the molar ratio with the hydrogen atom constituting the Si—H bond contained in (a2) is in the range of 1.0: 0.5 to 1.0: 0.66.
- the weight average molecular weights of the polyorganosiloxane (a1) and the polyorganosiloxane (a2) are usually 500 to 1,000,000, respectively, but from the viewpoint of realizing the effects of the present invention with good reproducibility, 5, It is 000 to 50,000.
- the weight average molecular weight, the number average molecular weight, and the degree of dispersion in the present invention are, for example, GPC apparatus (EcoSEC, HLC-8320GPC manufactured by Toso Co., Ltd.) and GPC column (TSKgel SuperMultipore HZ-N, TSKgel SuperMultipore HZ-N, manufactured by Toso Co., Ltd.).
- the viscosities of the polyorganosiloxane (a1) and the polyorganosiloxane (a2) are usually 10 to 10000 (mPa ⁇ s), respectively, but are preferably 50 to 10000 from the viewpoint of realizing the effects of the present invention with good reproducibility. (MPa ⁇ s).
- the viscosity in the present invention is a value measured with an E-type rotational viscometer at 25 ° C.
- Polyorganosiloxane (a1) and polyorganosiloxane (a2) react with each other by a hydrosilylation reaction to form a film. Therefore, the mechanism of curing is different from that via a silanol group, for example, and therefore any siloxane must contain a silanol group or a functional group that forms a silanol group by hydrolysis, such as an alkyloxy group. There is no.
- the adhesive component (S) contains a platinum group metal-based catalyst (A2) together with the above-mentioned polysiloxane (A1).
- a platinum-based metal catalyst is a catalyst for promoting the hydrosilylation reaction between the alkenyl group of the polyorganosiloxane (a1) and the Si—H group of the polyorganosiloxane (a2).
- platinum-based metal catalyst examples include platinum black, second platinum chloride, platinum chloride acid, a reaction product of platinum chloride acid and a monovalent alcohol, a complex of platinum chloride acid and olefins, platinum bisacetoacetate, and the like. Platinum-based catalysts, but are not limited to these. Examples of the complex of platinum and olefins include, but are not limited to, a complex of divinyltetramethyldisiloxane and platinum.
- the amount of the platinum group metal catalyst (A2) is usually in the range of 1.0 to 50.0 ppm with respect to the total amount of the polyorganosiloxane (a1) and the polyorganosiloxane (a2).
- the polyorganosiloxane component (A) may contain a polymerization inhibitor (A3) for the purpose of suppressing the progress of the hydrosilylation reaction.
- the polymerization inhibitor is not particularly limited as long as it can suppress the progress of the hydrosilylation reaction, and specific examples thereof include 1-ethynyl-1-cyclohexanol and 1,1-diphenyl-2-propion-1-ol. Such as alkynyl alcohol and the like.
- the amount of the polymerization inhibitor is usually 1000.0 ppm or more with respect to the total amount of the polyorganosiloxane (a1) and the polyorganosiloxane (a2) from the viewpoint of obtaining the effect, and excessively suppresses the hydrosilylation reaction. From the viewpoint of prevention, it is 10000.0 ppm or less.
- the adhesive composition used in the present invention may contain a release agent component (B).
- a release agent component (B) By including such a release agent component (B) in the adhesive composition used in the present invention, the obtained adhesive layer can be appropriately peeled off with good reproducibility.
- Typical examples of such release agent component (B) include polyorganosiloxane, and specific examples thereof include epoxy-modified polyorganosiloxane, methyl group-containing polyorganosiloxane, and phenyl group-containing polyorganosiloxane. However, it is not limited to these.
- the complex viscosity of the polyorganosiloxane, which is the release agent component (B), is not particularly limited, and is usually 100 to 10,000 (Pa ⁇ s) from the viewpoint of obtaining an adhesive layer having excellent peelability and adhesiveness with good reproducibility. ).
- the complex viscosity of polyorganosiloxane, which is the release agent component (B) means a value measured with a rheometer at 25 ° C. Such a complex viscosity can be measured using, for example, a rheometer MCR-302 manufactured by Anton Pearl Co., Ltd.
- Preferred examples of the polyorganosiloxane as the release agent component (B) include, but are not limited to, epoxy group-containing polyorganosiloxane, methyl group-containing polyorganosiloxane, and phenyl group-containing polyorganosiloxane.
- the weight average molecular weight of the polyorganosiloxane as the release agent component (B) is usually 100,000 to 2000,000, but from the viewpoint of realizing the effects of the present invention with good reproducibility, it is preferably 200,000 to 1,200,000, more preferably 300,000 to 900,000.
- the degree of dispersion is usually 1.0 to 10.0, but from the viewpoint of realizing the effects of the present invention with good reproducibility, it is preferably 1.5 to 5.0, more preferably 2.0 to 2.0. It is 3.0.
- the weight average molecular weight and the degree of dispersion can be measured by the above-mentioned method.
- epoxy group-containing polyorganosiloxane examples include those containing a siloxane unit (D 10 units) represented by R 11 R 12 SiO 2/2.
- R 11 is a group bonded to a silicon atom and represents an alkyl group
- R 12 is a group bonded to a silicon atom and represents an epoxy group or an organic group containing an epoxy group.
- Specific examples of the alkyl group include , The above-mentioned examples can be given.
- the epoxy group in the organic group containing an epoxy group may be an independent epoxy group without condensation with another ring, and forms a fused ring with another ring like a 1,2-epoxide cyclohexyl group. It may be an epoxy group.
- Specific examples of the organic group containing an epoxy group include, but are not limited to, 3-glycidoxypropyl and 2- (3,4-epoxycyclohexyl) ethyl.
- a preferable example of the epoxy group-containing polyorganosiloxane includes, but is not limited to, epoxy-modified polydimethylsiloxane.
- the epoxy group-containing polyorganosiloxane contains the above-mentioned siloxane unit (D 10 unit), but may contain the above Q unit, M unit and / or T unit in addition to the D 10 unit.
- specific examples of the epoxy group-containing polyorganosiloxane include polyorganosiloxane consisting of only D 10 units, polyorganosiloxane containing D 10 units and Q units, D 10 units and M units.
- examples thereof include siloxane, polyorganosiloxane containing D 10 units, Q units, M units and T units.
- the epoxy group-containing polyorganosiloxane is preferably an epoxy group-containing polydimethylsiloxane having an epoxy value of 0.1 to 5, and the weight average molecular weight thereof is usually 1,500 to 500,000, but in an adhesive. From the viewpoint of suppressing precipitation, it is preferably 100,000 or less.
- epoxy group-containing polyorganosiloxane examples include, but are not limited to, those represented by the formulas (E1) to (E3).
- M 2 and n 2 indicate the number of each repeating unit and are positive integers, and R is an alkylene group having 1 to 10 carbon atoms.
- M 3 , n 3 and o 3 indicate the number of each repeating unit and are positive integers, and R is an alkylene group having 1 to 10 carbon atoms.
- the methyl group-containing polyorganosiloxane may be, for example, a siloxane unit (D 200 units) represented by R 210 R 220 SiO 2/2 , preferably a siloxane unit (D 20) represented by R 21 R 21 SiO 2/2. Unit) is included.
- R 210 and R 220 are groups bonded to a silicon atom and independently represent an alkyl group, but at least one of them is a methyl group, and specific examples of the alkyl group include the above-mentioned examples.
- R 21 is a group bonded to a silicon atom, represents an alkyl group, and specific examples of the alkyl group include the above-mentioned examples. Of these, a methyl group is preferable as R 21.
- a preferable example of the methyl group-containing polyorganosiloxane is, but is not limited to, polydimethylsiloxane.
- the methyl group-containing polyorganosiloxane contains the above-mentioned siloxane units (D 200 units or D 20 units), but contains the above Q units, M units and / or T units in addition to D 200 units and D 20 units. You may.
- methyl group-containing polyorganosiloxane examples include polyorganosiloxane consisting of only D 200 units, polyorganosiloxane containing D 200 units and Q units, D 200 units and M units.
- Examples thereof include siloxane, polyorganosiloxane containing 200 units of D, Q units, M units and T units.
- methyl group-containing polyorganosiloxane examples include polyorganosiloxane consisting of only D 20 units, polyorganosiloxane containing D 20 units and Q units, D 20 units and M units.
- Examples thereof include siloxane, polyorganosiloxane containing 20 units of D, Q units, M units and T units.
- methyl group-containing polyorganosiloxane examples include, but are not limited to, those represented by the formula (M1).
- N 4 indicates the number of repeating units and is a positive integer.
- the phenyl group-containing polyorganosiloxane for example, those containing siloxane units represented by R 31 R 32 SiO 2/2 (D 30 units).
- R 31 is a group bonded to a silicon atom and represents a phenyl group or an alkyl group
- R 32 is a group bonded to a silicon atom and represents a phenyl group.
- Specific examples of the alkyl group include the above-mentioned examples. Although it can be mentioned, a methyl group is preferable.
- the phenyl group-containing polyorganosiloxane contains the above-mentioned siloxane unit (D 30 unit), but may contain the above Q unit, M unit and / or T unit in addition to the D 30 unit.
- phenyl group-containing polyorganosiloxane examples include polyorganosiloxane consisting of only D 30 units, polyorganosiloxane containing D 30 units and Q units, D 30 units and M units.
- Examples thereof include siloxane, polyorganosiloxane containing 30 units of D, Q units, M units and T units.
- methyl group-containing polyorganosiloxane examples include, but are not limited to, those represented by the formula (P1) or (P2).
- the adhesive composition used in the present invention contains a release agent component (B) together with a polyorganosiloxane component (A) that is cured by a hydrosilylation reaction, and in a preferred embodiment, the release agent component (B). ), Polyorganosiloxane is included.
- the adhesive composition used in the present invention can contain the adhesive component (S) and the release agent component (B) in an arbitrary ratio, but considering the balance between the adhesiveness and the release property, the component (S) ) And the component (B) in terms of mass ratio, preferably 99.995: 0.005 to 30:70, more preferably 99.9: 0.1 to 75:25. That is, when the polyorganosiloxane component (A) cured by the hydrosilylation reaction is contained, the ratio of the component (A) to the component (B) is a mass ratio, preferably 99.995: 0.005 to 30 :. 70, more preferably 99.9: 0.1 to 75:25.
- the adhesive composition used in the present invention may contain a solvent for the purpose of adjusting the viscosity, and specific examples thereof include aliphatic hydrocarbons, aromatic hydrocarbons, and ketones. Not limited to.
- the adhesive composition used in the present invention contains a solvent
- the content thereof is appropriately set in consideration of the viscosity of the desired composition, the coating method to be adopted, the thickness of the thin film to be produced, and the like.
- the range is about 10 to 90% by mass with respect to the entire composition.
- the viscosity of the adhesive composition used in the present invention is usually 500 to 20,000 mPa ⁇ s, preferably 1,000 to 5,000 mPa ⁇ s at 25 ° C.
- the viscosity of the adhesive composition of the present invention can be adjusted by changing the types of organic solvents used, their ratios, the concentration of film constituents, etc., in consideration of various factors such as the coating method used and the desired film thickness. Is.
- the adhesive composition used in the present invention can be produced by mixing an adhesive component (S), and when used, a release agent component (B) and a solvent.
- the mixing order is not particularly limited, but as an example of a method capable of easily and reproducibly producing an adhesive composition, for example, the adhesive component (S) and the release agent component (B) are used as a solvent. Examples thereof include a method of dissolving, and a method of dissolving a part of the adhesive component (S) and the release agent component (B) in a solvent, dissolving the rest in a solvent, and mixing the obtained solution, but the method is limited thereto. Not done.
- the adhesive composition may be appropriately heated as long as the components are not decomposed or deteriorated.
- the adhesive composition may be filtered using a submicrometer-order filter or the like during the production of the adhesive composition or after mixing all the components. ..
- the thickness of the adhesive layer provided in the laminate of the present invention is usually 5 to 500 ⁇ m, but from the viewpoint of maintaining the film strength, it is preferably 10 ⁇ m or more, more preferably 20 ⁇ m or more, still more preferably 30 ⁇ m or more, and the thickness. From the viewpoint of avoiding non-uniformity caused by the film, it is preferably 200 ⁇ m or less, more preferably 150 ⁇ m or less, still more preferably 120 ⁇ m or less, still more preferably 70 ⁇ m or less.
- the adhesive composition may be applied to the first substrate and the release agent composition may be applied to the second substrate and heated, but as long as the effects of the present invention are not impaired, one of the substrates may be used.
- the adhesive composition and the release agent composition may be applied and heated in sequence, and the order of application at this time may be arbitrary, but in the present invention, a laminate capable of satisfactorily separating the second substrate is reproduced.
- an embodiment in which an adhesive composition is applied to the surface of the first substrate to form an adhesive coating layer, and a release agent composition is applied to the surface of the second substrate to form a release agent coating layer. Is preferable.
- the adhesive composition or the release agent composition is applied to the circuit surface of the wafer, which is the first substrate, or the surface of the support, which is the second substrate, and heated to form an adhesive coating layer or a release agent composition, respectively.
- the release agent coating layer is formed, the circuit surface of the wafer and the surface of the support are brought into contact with each other so that the two coating layers are in contact with each other, and the first substrate and the second substrate are subjected to heat treatment, reduced pressure treatment, or both.
- a laminate can be produced by applying a load in the thickness direction of the substrate to bring the two layers into close contact with each other and then performing a post-heat treatment.
- the coating method is not particularly limited, but is usually a spin coating method.
- a method of separately forming a coating film by a spin coating method or the like and attaching a sheet-shaped coating film may be adopted, and this is also referred to as coating or coating film.
- the heating temperature of the applied adhesive composition cannot be unconditionally specified because it varies depending on the type and amount of the adhesive component contained in the adhesive composition, whether or not a solvent is contained, the desired thickness of the adhesive layer, and the like.
- the temperature is usually 80 ° C. to 150 ° C.
- the heating time is usually 30 seconds to 5 minutes.
- the heating temperature of the applied release agent composition cannot be unconditionally specified because it varies depending on the type and amount of the cross-linking agent, acid generator, acid, etc., whether or not a solvent is contained, the desired thickness of the release layer, and the like.
- the temperature is 120 ° C. or higher, and from the viewpoint of preventing excessive curing, the temperature is 400 ° C. or lower, and the heating time is usually 1 minute to 10 minutes.
- Heating can be performed using a hot plate, oven, etc.
- the film thickness of the adhesive coating layer obtained by applying the adhesive composition and heating the adhesive composition is usually about 5 to 500 ⁇ m, and is appropriately adjusted to be within the above-mentioned thickness range of the adhesive layer. It is decided.
- the film thickness of the release agent coating layer obtained by applying the release agent composition and heating the release agent composition is usually about 10 nm to 10 ⁇ m, and is appropriately adjusted to be within the above-mentioned thickness range of the release layer. It is decided.
- such coating layers are aligned so as to be in contact with each other, and while performing heat treatment, decompression treatment, or both, a load in the thickness direction of the first substrate and the second substrate is applied to form the two layers.
- the laminate of the present invention can be obtained by bringing them into close contact with each other and then performing a post-heat treatment. Which of the heat treatment, the reduced pressure treatment, and the combined use of both treatment conditions is adopted depends on the type of the adhesive composition, the specific composition of the release agent composition, the compatibility of the film obtained from both compositions, and the film thickness. , Determined after considering various circumstances such as required adhesive strength.
- the heat treatment is usually performed from the range of 20 to 150 ° C. from the viewpoint of softening the adhesive coating layer to achieve suitable bonding with the release agent coating layer, and from the viewpoint of achieving suitable curing of the release agent coating layer. It will be decided as appropriate.
- the temperature is preferably 130 ° C. or lower, more preferably 90 ° C. or lower, and the heating time surely expresses the adhesive ability.
- the adhesive layer and other members From the viewpoint of making the adhesive layer and other members deteriorate, it is usually 30 seconds or more, preferably 1 minute or more, but from the viewpoint of suppressing deterioration of the adhesive layer and other members, it is usually 10 minutes or less, preferably 5 minutes or less.
- the adhesive coating layer and the release agent coating layer in contact with each other may be brought under an atmospheric pressure of 10 Pa to 10,000 Pa.
- the time of the reduced pressure treatment is usually 1 to 30 minutes.
- the adhesive coating layer and the release agent coating layer in contact with each other are preferably bonded by a reduced pressure treatment, more preferably by a combined heat treatment and a reduced pressure treatment. Can be matched.
- the load in the thickness direction of the first substrate and the second substrate does not adversely affect the first substrate and the second substrate and the two layers between them, and these can be firmly adhered to each other.
- the load is not particularly limited as long as it is a load, but it is usually in the range of 10 to 1000 N.
- the post-heating temperature is preferably 120 ° C. or higher from the viewpoint of obtaining a sufficient curing rate, and preferably 260 ° C. or lower from the viewpoint of preventing deterioration of the substrate and the adhesive.
- the heating time is usually 1 minute or more, preferably 5 minutes or more, from the viewpoint of realizing suitable bonding of the substrate and the layer constituting the laminate, and adverse effects on the adhesive layer and the peeled layer due to excessive heating, etc. From the viewpoint of avoiding the above, it is usually 180 minutes or less, preferably 120 minutes or less. Heating can be performed using a hot plate, an oven, or the like.
- One purpose of the post-heat treatment is to more preferably cure the adhesive component (S).
- the peeling method of the present invention irradiates the peeling layer with light from the second base side of the laminate of the present invention to separate the second base from the first base and the adhesive layer.
- the first substrate and the second substrate that transmits light are temporarily bonded to each other so as to be suitably peelable by the adhesive layer and the release layer that absorbs light.
- the peeling layer is irradiated with a laser at the time of irradiation, the peeling ability is exhibited as described above, and the second substrate, the first substrate and the adhesive layer can be easily separated.
- the peeling is carried out after producing the laminate of the present invention and performing predetermined processing or the like on the laminate.
- the processing is, for example, processing on the opposite side of the circuit surface of the wafer, and examples thereof include thinning of the wafer by polishing the back surface of the wafer. After that, a through silicon via (TSV) or the like is formed, and then the thinned wafer is peeled off from the support to form a laminated body of the wafer, which is three-dimensionally mounted. Further, before and after that, the back surface electrode of the wafer and the like are also formed.
- the thinning of the wafer and the TSV process are subjected to heat of 250 to 350 ° C. while being adhered to the support, and the laminate of the present invention is subject to the load including the adhesive layer.
- the processing is not limited to the above-mentioned processing, and the processing includes, for example, the implementation of a semiconductor component mounting process when temporarily bonded to a support in order to support a base material for mounting the semiconductor component.
- a wafer having a diameter of 300 mm and a thickness of about 770 ⁇ m can be thinned to a thickness of about 10 ⁇ m to 100 ⁇ m by polishing the back surface opposite to the circuit surface on the front surface.
- the laser irradiation does not necessarily have to be applied to the entire region of the adhesive layer. Even if the area irradiated with the laser and the area not irradiated with the laser are mixed, if the adhesive strength of the adhesive layer as a whole is sufficiently lowered, a slight external force is applied to pull up the second substrate, for example. , The second substrate can be removed from the laminate.
- the ratio and positional relationship between the area to be irradiated with the laser and the area not to be irradiated will differ depending on the type of adhesive used, its specific composition, the thickness of the adhesive layer, the intensity of the laser to be irradiated, etc. , Conditions can be set as appropriate without requiring excessive testing.
- a region that is the same width as the line width of the laser and is not irradiated with the laser may be provided next to the region that is irradiated with the laser.
- the second substrate can be separated even when only a part of the adhesive layer is irradiated with the laser, so that the laser irradiation time per laminated body can be shortened, and as a result, peeling occurs.
- the total time required can be shortened.
- the method for manufacturing a processed semiconductor substrate of the present invention is a first step of manufacturing the laminate of the present invention, a second step of processing a semiconductor substrate which is the first substrate of the obtained laminate, and a second substrate.
- the third step of separating the support substrate from the processed semiconductor substrate and the adhesive layer which are the first substrates, and the adhesive layer was removed from the processed semiconductor substrate which is the first substrate and processed as the first substrate.
- This is a method for manufacturing a semiconductor substrate that has been processed such as thinning, including a fourth step of cleaning the semiconductor substrate.
- the fourth step of removing the adhesive layer from the processed semiconductor substrate which is the first substrate and cleaning the processed semiconductor substrate which is the first substrate is the adhesive layer on the processed semiconductor substrate such as thinning. To remove. At this time, if the peeling layer remains on the adhesive layer, it is also removed.
- the removal can be carried out using, for example, a detergent composition containing a salt.
- the method for manufacturing a processed semiconductor substrate of the present invention includes the above-mentioned first steps to fourth steps, but may include steps other than these steps. Further, the above-mentioned constituent elements and method elements related to the first step to the fourth step may be variously changed as long as they do not deviate from the gist of the present invention.
- release agent composition [Example 1-1] 1.11 g of a polynuclear phenol derivative represented by the formula (P1) (manufactured by Asahi Organic Materials Co., Ltd., trade name TEP-TPA) and a compound represented by the formula (L17M) as a cross-linking agent (Honshu Chemical Industry Co., Ltd.)
- Product name TMOM-BP 0.22 g and 1% by mass propylene glycol monomethyl ether solution of pyridinium paratoluene sulfonate as an acid 2.23 g are added and stirred, and then 10.84 g of propylene glycol monomethyl ether and propylene glycol monomethyl ether are further added. 5.59 g of acetate was added and stirred to obtain a solution. The obtained solution was filtered using a polyethylene microfilter having a pore size of 0.2 ⁇ m to obtain a release agent composition.
- Example 2-1 Production of Laminated Body [Example 2-1] The release agent composition obtained in Example 1-1 was spin-coated on a 100 mm glass wafer so that the film thickness in the finally obtained laminate was about 200 nm, and heated at 250 ° C. for 5 minutes. , A release agent coating layer was formed on the glass wafer which is the second substrate. On the other hand, the adhesive composition obtained in Preparation Example 1 was spin-coated on a 100 mm silicon wafer so that the film thickness in the finally obtained laminate was about 60 ⁇ m, and the adhesive composition was spin-coated at 120 ° C. for 1.5 minutes. It was heated to form an adhesive coating layer on a silicon wafer as a first substrate.
- the glass wafer and the silicon wafer are bonded so as to sandwich the release agent coating layer and the adhesive coating layer, and then heat-treated at 200 ° C. for 10 minutes to prepare a laminate. bottom.
- the bonding was performed at a temperature of 23 ° C. and a decompression degree of 1,500 Pa.
- Example 3-1 Storage stability test of release agent composition
- the release agent composition obtained in Example 1-1 was stored at 23 ° C. for 1 month.
- the light transmittance of the composition before storage at a wavelength of 560 nm was 89%.
- the transmittance of the light of the composition after storage at a wavelength of 560 nm was 88%, no substantial change in the transmittance was observed, and no noticeable change was confirmed by visual confirmation of the appearance.
- the release agent composition of the present invention showed excellent storage stability.
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Abstract
Description
このような接着と分離のプロセスのためにレーザー照射による方法が開示(例えば特許文献1、特許文献2を参照)されているが、昨今の半導体分野における更なる進展に伴い、レーザー照射による剥離に関わる新たな技術は、常に求められている。
1.半導体基板からなる第1基体と、
光透過性の支持基板からなる第2基体と、
上記第1基体と上記第2基体との間に、接着層及び剥離層とを備え、
上記剥離層が、式(P)で表される多核フェノール誘導体と、架橋剤と、酸発生剤及び酸の少なくともいずれか一方とを含む剥離剤組成物から得られる膜であることを特徴とする積層体、
2.上記多核フェノール誘導体が、式(P-1)で表される1の積層体、
5.上記架橋剤が、架橋形成基を有するフェノール系架橋剤、架橋形成基を有するメラミン系架橋剤、架橋形成基を有する尿素系架橋剤及び架橋形成基を有するチオ尿素系架橋剤から選ばれる少なくとも1種を含む、1~4のいずれかの積層体、
6.上記架橋剤が、架橋形成基を有するフェノール系架橋剤を含む5の積層体、
7.上記剥離剤組成物が、酸を含む1~6のいずれかの積層体、
8.上記酸が、アリールスルホン酸、アリールスルホン酸の塩、アリールカルボン酸、アリールカルボン酸塩、鎖状又は環状アルキルスルホン酸、鎖状又は環状アルキルスルホン酸の塩、鎖状又は環状アルキルカルボン酸及び鎖状又は環状アルキルカルボン酸から選択される少なくとも1種を含む7の積層体、
9.上記接着層が、シリコーン系接着剤、アクリル樹脂系接着剤、エポキシ樹脂系接着剤、ポリアミド系接着剤、ポリスチレン系接着剤、ポリイミド接着剤及びフェノール樹脂系接着剤から選ばれる少なくとも1種を含む接着剤成分(S)を含む接着剤組成物を用いて得られた膜であることを特徴とする1~8のいずれかの積層体、
10.上記接着剤成分(S)が、シリコーン系接着剤を含む9の積層体、
11.上記シリコーン系接着剤が、ヒドロシリル化反応により硬化するポリシロキサン成分(A)を含む10の積層体、
12.式(P)で表される多核フェノール誘導体と、架橋剤と、酸発生剤及び酸の少なくともいずれか一方とを含む剥離剤組成物、
13.上記多核フェノール誘導体が、式(P-1)で表される12の剥離剤組成物、
17.上記架橋剤が、架橋形成基を有するフェノール系架橋剤を含む12~16のいずれかの剥離剤組成物、
18.上記剥離剤組成物が、酸を含む12~17のいずれかの剥離剤組成物、
19.上記酸が、アリールスルホン酸、アリールスルホン酸の塩、アリールカルボン酸、アリールカルボン酸塩、鎖状又は環状アルキルスルホン酸、鎖状又は環状アルキルスルホン酸の塩、鎖状又は環状アルキルカルボン酸及び鎖状又は環状アルキルカルボン酸から選択される少なくとも1種を含む18の剥離剤組成物、
20.半導体基板からなる第1基体と、光透過性の支持基板からなる第2基体と、上記第1基体と上記第2基体との間に、接着層及び剥離層とを備える積層体の上記剥離層を形成するために用いられる12~19のいずれかの剥離剤組成物を提供する。
このような特徴を有する本発明の積層体を用いることで、例えば、第1基体であるウエハーの裏面を加工した後に第2基体である支持基板から加工されたウエハーを分離する際に、第2基体側からレーザーを照射することで、当該加工されたウエハーを容易に分離できるため、ウエハーに対する機械的な応力を回避でき、その結果、ウエハーの反り、変形等のダメージを回避できる。更に、本発明の積層体が備える剥離層は、剥離層が剥離能を発揮する際に悪影響を引き起こす顕著なガスの発生や大きな発熱もなく、半導体基板からなる第1基体への影響も低減されている。従って、本発明の積層体を用いることで、より信頼性の高い半導体素子の製造を期待することができる。
更に、本発明の剥離剤組成物は、経時に伴う変色又は着色が抑制されており、保存安定性に優れる。それ故、例えば、これまで以上の量の剥離剤組成物を作り置くことが可能となり、その結果、製造設備の効率的な使用が可能となるため、当該剥離剤組成物自体の製造コストやこれを用いて製造される半導体素子のコストの低減が期待される。
光透過性の支持基板の透過率は、通常50%以上、好ましくは60%以上、より好ましく70%以上、より一層好ましくは80%以上、更に好ましくは90%以上である。
典型的には、光透過性の支持基板は、レーザーを透過する基板であり、そのようなレーザーの波長は、通常190nm~600nmであるが、その下限値は、ある態様においては250nm、その他の態様においては300nmであり、その上限値は、ある態様においては580nm、その他の態様においては560nmである。本発明の積層体は、波長が308nm、343nm、355nm又は532nmのレーザーによって、好適に剥離し得る。
このような架橋剤の具体例としては、上記多環フェノール誘導体と架橋をすることができる限り特に限定されるものではないが、典型的には、ヒドロキシメチル基、メトキシメチル基、ブトキシメチル基等のアルコキシメチル基等の架橋形成基を分子内に有する、フェノール系架橋剤、メラミン系架橋剤、尿素系架橋剤、チオ尿素系架橋剤等が挙げられ、これらは低分子化合物であっても、高分子化合物であってもよい。
上記剥離剤組成物が含む架橋剤は、通常、2個以上の架橋形成基を有するが、より好適な硬化を再現性よく実現する観点から、架橋剤である化合物に含まれる架橋形成基の数は、好ましくは2~10、より好ましくは2~6である。
上記剥離剤組成物が含む架橋剤は、より高い耐熱性を実現する観点からは、好ましくは分子内に芳香環(例えば、ベンゼン環、ナフタレン環)を有し、そのような架橋剤の典型例としては、これに限定されるものではないが、フェノール系架橋剤が挙げられる。
架橋形成基が結合する芳香環とフェノール性水酸基及び/又はフェノール性水酸基から誘導されるアルコキシ基が結合する芳香環はいずれも、ベンゼン環等の非縮環型芳香族環に限られず、ナフタレン環、アントラセン等の縮環型芳香族環であってもよい。
フェノール系架橋剤の分子内に芳香環が複数存在する場合、架橋形成基とフェノール性水酸基及びフェノール性水酸基から誘導されるアルコキシ基とは、分子内の同じ芳香環に結合していてもよく、異なる芳香環に結合していてもよい。
架橋形成基やフェノール性水酸基及びフェノール性水酸基から誘導されるアルコキシ基が結合する芳香環は、メチル基、エチル基、ブチル基等のアルキル基、フェニル基等のアリール基等の炭化水素基、フッ素原子等のハロゲン原子等で更に置換されていてもよい。
架橋形成基を有するメラミン系架橋剤の具体例としては、N,N,N’,N’,N”,N”-ヘキサキス(メトキシメチル)メラミン、N,N,N’,N’,N”,N”-ヘキサキス(ブトキシメチル)メラミン等のモノ、ビス、トリス、テトラキス、ペンタキス又はヘキサキスアルコキシメチルメラミン、N,N,N’,N’-テトラキス(メトキシメチル)ベンゾグアナミン、N,N,N’,N’-テトラキス(ブトキシメチル)ベンゾグアナミン等のモノ、ビス、トリス又はテトラキスアルコキシメチルベンゾグアナミン等が挙げられるが、これらに限定されない。
架橋形成基を有する尿素系架橋剤の具体例としては、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル、1,3,4,6-テトラキス(ブトキシメチル)グリコールウリル等のモノ、ビス、トリス又はテトラキスアルコキシメチルグリコールウリル、1,3-ビス(メトキシメチル)尿素、1,1,3,3-テトラキスメトキシメチル尿素等のモノ、ビス、トリス又はテトラキスアルコキシメチル尿素等が挙げられるが、これらに限定されない。
架橋形成基を有するチオ尿素系架橋剤の具体例としては、1,3-ビス(メトキシメチル)チオ尿素、1,1,3,3-テトラキスメトキシメチルチオ尿素等のモノ、ビス、トリス又はテトラキスアルコキシメチルチオ尿素等が挙げられるが、これらに限定されない。
なお、本発明において、膜構成成分とは、組成物に含まれる溶媒以外の成分を意味する。
熱酸発生剤は、熱により酸を発生する限り特に限定されるものではなく、その具体例としては、2,4,4,6-テトラブロモシクロヘキサジエノン、ベンゾイントシレート、2-ニトロベンジルトシレート、K-PURE〔登録商標〕CXC-1612、同CXC-1614、同TAG-2172、同TAG-2179、同TAG-2678、同TAG2689、同TAG2700(King Industries社製)、及びSI-45、SI-60、SI-80、SI-100、SI-110、SI-150(三新化学工業(株)製)その他有機スルホン酸アルキルエステル等が挙げられるが、これらに限定されない。
中でも、均一性の高い組成物を再現性よく得る観点、保存安定性の高い組成物を再現性よく得る観点、均一性の高い薄膜を与える組成物を再現性よく得る観点等から、炭素数2~3の直鎖状又は分岐状アルキレン基が好ましく、炭素数3の直鎖状又は分岐状アルキレン基がより好ましい。
中でも、均一性の高い組成物を再現性よく得る観点、保存安定性の高い組成物を再現性よく得る観点、均一性の高い薄膜を与える組成物を再現性よく得る観点等から、メチル基、エチル基が好ましく、メチル基がより好ましい。
中でも、均一性の高い組成物を再現性よく得る観点、保存安定性の高い組成物を再現性よく得る観点、均一性の高い薄膜を与える組成物を再現性よく得る観点等から、メチルカルボニル基、エチルカルボニル基が好ましく、メチルカルボニル基がより好ましい。
その混合順序は特に限定されるものではないが、容易にかつ再現性よく剥離剤組成物を製造できる方法の一例としては、式(P)で表される多核フェノール誘導体、架橋剤並びに酸発生剤及び/又は酸を一度に溶媒に溶解させる方法や、式(P)で表される多核フェノール誘導体、架橋剤並びに酸発生剤及び/又は酸の一部を溶媒に溶解させ、残りを溶媒に別途溶解させ、得られた各溶液を混合する方法が挙げられるが、これらに限定されない。なお、剥離剤組成物を調製する際、成分が分解したり変質したりしない範囲で、適宜加熱してもよい。
本発明においては、異物を除去する目的で、剥離剤組成物を製造する途中で又は全ての成分を混合した後に、サブマイクロメートルオーダーのフィルター等を用いてろ過してもよい。
このような接着剤成分(S)は、この種の用途に用いられるものであれば特に限定されるものではなく、例えば、シリコーン系接着剤、アクリル樹脂系接着剤、エポキシ樹脂系接着剤、ポリアミド系接着剤、ポリスチレン系接着剤、ポリイミド接着剤、フェノール樹脂系接着剤等が挙げられるが、これらに限定されない。
これらの中でも、ウエハー等の加工時は好適な接着能を示し、加工の後は好適に剥離可能であり、更に耐熱性にも優れることから、接着剤成分(S)としては、シリコーン系接着剤が好ましい。
中でも、メチル基が好ましい。
中でも、エテニル基、2-プロペニル基が好ましい。
なお、本発明における重量平均分子量及び数平均分子量並びに分散度は、例えば、GPC装置(東ソー(株)製EcoSEC,HLC-8320GPC)及びGPCカラム(東ソー(株)製TSKgel SuperMultiporeHZ-N, TSKgel SuperMultiporeHZ-H)を用い、カラム温度を40℃とし、溶離液(溶出溶媒)としてテトラヒドロフランを用い、流量(流速)を0.35mL/分とし、標準試料としてポリスチレン(シグマアルドリッチ社製)を用いて、測定することができる。
このような白金系の金属触媒は、ポリオルガノシロキサン(a1)のアルケニル基とポリオルガノシロキサン(a2)のSi-H基とのヒドロシリル化反応を促進するための触媒である。
白金とオレフィン類との錯体としては、例えばジビニルテトラメチルジシロキサンと白金との錯体が挙げられるが、これに限定されない。
白金族金属系触媒(A2)の量は、通常、ポリオルガノシロキサン(a1)及びポリオルガノシロキサン(a2)の合計量に対して、1.0~50.0ppmの範囲である。
重合抑制剤は、ヒドロシリル化反応の進行を抑制できる限り特に限定されるものではなく、その具体例としては、1-エチニル-1-シクロヘキサノール、1,1-ジフェニル-2-プロピオン-1-オール等のアルキニルアルコール等が挙げられる。
重合抑制剤の量は、ポリオルガノシロキサン(a1)及びポリオルガノシロキサン(a2)の合計量に対して、通常、その効果を得る観点から1000.0ppm以上であり、ヒドロシリル化反応の過度な抑制を防止する観点から10000.0ppm以下である。
このような剥離剤成分(B)として、典型的には、ポリオルガノシロキサンが挙げられ、その具体例としては、エポキシ変性ポリオルガノシロキサン、メチル基含有ポリオルガノシロキサン、フェニル基含有ポリオルガノシロキサン等が挙げられるが、これらに限定されない。
エポキシ基を含む有機基におけるエポキシ基は、その他の環と縮合せずに、独立したエポキシ基であってもよく、1,2-エポキシシクロヘキシル基のように、その他の環と縮合環を形成しているエポキシ基であってもよい。
エポキシ基を含む有機基の具体例としては、3-グリシドキシプロピル、2-(3,4-エポキシシクロヘキシル)エチルが挙げられるが、これらに限定されない。
本発明において、エポキシ基含有ポリオルガノシロキサンの好ましい一例としては、エポキシ変性ポリジメチルシロキサンを挙げることができるが、これに限定されない。
本発明の好ましい一態様においては、エポキシ基含有ポリオルガノシロキサンの具体例としては、D10単位のみからなるポリオルガノシロキサン、D10単位とQ単位とを含むポリオルガノシロキサン、D10単位とM単位とを含むポリオルガノシロキサン、D10単位とT単位とを含むポリオルガノシロキサン、D10単位とQ単位とM単位とを含むポリオルガノシロキサン、D10単位とM単位とT単位とを含むポリオルガノシロキサン、D10単位とQ単位とM単位とT単位とを含むポリオルガノシロキサン等が挙げられる。
R21は、ケイ素原子に結合する基であり、アルキル基を表し、アルキル基の具体例としては、上述の例示を挙げることができる。中でも、R21としては、メチル基が好ましい。
本発明において、メチル基含有ポリオルガノシロキサンの好ましい一例としては、ポリジメチルシロキサンを挙げることができるが、これに限定されない。
すなわち、ヒドロシリル化反応により硬化するポリオルガノシロキサン成分(A)が含まれる場合、成分(A)と成分(B)との比率は、質量比で、好ましくは99.995:0.005~30:70、より好ましくは99.9:0.1~75:25である。
その混合順序は特に限定されるものではないが、容易にかつ再現性よく接着剤組成物を製造できる方法の一例としては、例えば、接着剤成分(S)と剥離剤成分(B)を溶媒に溶解させる方法や、接着剤成分(S)と剥離剤成分(B)の一部を溶媒に溶解させ、残りを溶媒に溶解させ、得られた溶液を混合する方法が挙げられるが、これらに限定されない。なお、接着剤組成物を調製する際、成分が分解したり変質したりしない範囲で、適宜加熱してもよい。
本発明においては、異物を除去する目的で、接着剤組成物を製造する途中で又は全ての成分を混合した後に、サブマイクロメートルオーダーのフィルター等を用いて接着剤組成物をろ過してもよい。
ここで、接着剤組成物を第1基体に、剥離剤組成物を第2基体にそれぞれ塗布し、加熱してもよいが、本発明の効果が損なわれない限り、いずれか一方の基体に、接着剤組成物及び剥離剤組成物の塗布及び加熱をそれぞれ順次行ってもよく、この際の塗布の順序も任意であるが、本発明においては、第2基体を良好に分離できる積層体を再現性よく得る観点から、第1基体の表面に接着剤組成物を塗布して接着剤塗布層を形成し、第2基体の表面に剥離剤組成物を塗布して剥離剤塗布層を形成する態様が好ましい。
なお、後加熱処理の一つの目的は、接着剤成分(S)をより好適に硬化させることである。
また、加工は上述した加工に限定されず、例えば、半導体部品を実装するための基材をサポートするために支持体と仮接着した場合の半導体部品の実装プロセスの実施なども加工に含まれる。
このように、接着層の一部のみにレーザーを照射する場合であっても第2基体を分離することができるため、積層体1つ当たりのレーザーの照射時間を短くでき、その結果、剥離に要する総時間を短縮することができる。
(1)撹拌機A:(株)シンキー製 あわとり練太郎
(2)撹拌機B:アズワン(株)製 ミックスローター VMR-5R
(3)貼り合せ装置:ズースマイクロテック社製 マニュアルボンダー
(4)レーザー照射装置(剥離装置):Lotus-TII製、LT-2137
[調製例1]
撹拌機A専用の600mL撹拌容器に、(a1)としてビニル基含有MQ樹脂(ワッカーケミ社製)のp-メンタン溶液(濃度80.6質量%)104.14g、(H)として式(A)で表されるポリオルガノシロキサン(複素粘度800Pa・s)58.11g、溶媒としてp-メンタン(日本テルペン化学(株)製)34.94g及びn-デカン(三協化学(株)製)6.20gを加え、撹拌機Aで5分間撹拌した。
得られた混合物に、(a2)として粘度100mPa・sのSiH基含有直鎖状ポリジメチルシロキサン(ワッカーケミ社製)16.79g及び(a1)として粘度200mPa・sのビニル基含有直鎖状ポリジメチルシロキサン(ワッカーケミ社製)24.54gを加え、更にそこへ、(A3)として1,1-ジフェニル-2-プロピン-1-オール(東京化成工業(株)製)1.61g及び1-エチニル-1-シクロヘキサノール(ワッカーケミ社製)1.61g並びに溶媒としてp-メンタン(日本テルペン化学(株)製)3.23gを撹拌機Bで60分間撹拌して別途得られた混合物のうち1.29gを加え、撹拌機Aで5分間撹拌した。
得られた混合物に、(A2)として白金触媒(ワッカーケミ社製)0.65g及び(a1)として粘度1000mPa・sのビニル基含有直鎖状ポリジメチルシロキサン(ワッカーケミ社製)19.37gを撹拌機Aで5分間撹拌して別途得られた混合物のうち4.00gを加え、撹拌機Aで5分間撹拌した。
最後に、得られた混合物をナイロンフィルター300メッシュでろ過し、接着剤組成物を得た。なお、得られた接着剤組成物の粘度は、3000mPa・sであった。
[実施例1-1]
式(P1)で表される多核フェノール誘導体1.11g(旭有機材(株)製、商品名 TEP-TPA)に、架橋剤として式(L17M)で表される化合物(本州化学工業(株)製 商品名 TMOM-BP)0.22g及び酸としてピリジニウムパラトルエンスルホネートの1質量%プロピレングリコールモノメチルエーテル溶液2.23gを加えて撹拌し、更にそこへプロピレングリコールモノメチルエーテル10.84g及びプロピレングリコールモノメチルエーテルアセテート5.59gを加えて撹拌し、溶液を得た。
得られた溶液を、孔径0.2μmのポリエチレン製ミクロフィルターを用いてろ過し、剥離剤組成物を得た。
[実施例2-1]
実施例1-1で得られた剥離剤組成物を、100mmのガラスウエハーに、最終的に得られる積層体中の膜厚が200nm程度となるようにスピンコートし、250℃で5分間加熱し、第2基体であるガラスウエハー上に剥離剤塗布層を形成した。
一方、調製例1で得られた接着剤組成物を、100mmのシリコンウエハーに、最終的に得られる積層体中の膜厚が60μm程度となるようにスピンコートし、120℃で1.5分間加熱し、第1基体であるシリコンウエハー上に接着剤塗布層を形成した。
そして、貼り合せ装置を用いて、ガラスウエハーとシリコンウエハーとを、剥離剤塗布層と接着剤塗布層とを挟み込むように貼り合わせ、200℃10分間の後加熱処理をすることにより積層体を作製した。なお、貼り合せは、温度23℃、減圧度1,500Paで行った。
得られた積層体にレーザー照射装置を使って、ガラスウエハー側からレーザーを照射し、出力40~160mJ/cm2の範囲にて剥離が生じる最低のレーザー出力を確認し、これを最適照射量とした。その結果、最適照射量は100mJ/cm2であった。
実施例2-1と同様の方法で得た積層体に、レーザー照射装置を使って、ガラスウエハー側からレーザーをウエハーの全面に照射し、照射後にガラスウエハーが剥離可能か否かを確認した。この際、レーザーは前後左右にオーバーラップしない様に照射した。また、レーザー出力は最適照射量である100mJ/cm2とした。
その結果、照射後、ほぼ力をかけることなくマニュアルで、ガラスウエハー(キャリア側)を容易に剥離可能であることが確認できた。
[実施例3-1]
実施例1-1で得られた剥離剤組成物を、23℃で1か月保管した。なお、保管前の組成物の波長560nmの光の透過率は89%であった。その結果、保管後の組成物の波長560nmの光の透過率は88%であり、透過率についての実質的な変化は認められず、目視による外観の確認でも目立った変化は確認されなかった。
このように、本発明の剥離剤組成物は、優れた保存安定性を示した。
Claims (20)
- 上記架橋剤が、架橋形成基を有するフェノール系架橋剤、架橋形成基を有するメラミン系架橋剤、架橋形成基を有する尿素系架橋剤及び架橋形成基を有するチオ尿素系架橋剤から選ばれる少なくとも1種を含む、請求項1~4のいずれか1項記載の積層体。
- 上記架橋剤が、架橋形成基を有するフェノール系架橋剤を含む請求項5記載の積層体。
- 上記剥離剤組成物が、酸を含む請求項1~6のいずれか1項記載の積層体。
- 上記酸が、アリールスルホン酸、アリールスルホン酸の塩、アリールカルボン酸、アリールカルボン酸塩、鎖状又は環状アルキルスルホン酸、鎖状又は環状アルキルスルホン酸の塩、鎖状又は環状アルキルカルボン酸及び鎖状又は環状アルキルカルボン酸から選択される少なくとも1種を含む請求項7記載の積層体。
- 上記接着層が、シリコーン系接着剤、アクリル樹脂系接着剤、エポキシ樹脂系接着剤、ポリアミド系接着剤、ポリスチレン系接着剤、ポリイミド接着剤及びフェノール樹脂系接着剤から選ばれる少なくとも1種を含む接着剤成分(S)を含む接着剤組成物を用いて得られた膜であることを特徴とする請求項1~8のいずれか1項記載の積層体。
- 上記接着剤成分(S)が、シリコーン系接着剤を含む請求項9記載の積層体。
- 上記シリコーン系接着剤が、ヒドロシリル化反応により硬化するポリシロキサン成分(A)を含む請求項10記載の積層体。
- 上記架橋剤が、架橋形成基を有するフェノール系架橋剤、架橋形成基を有するメラミン系架橋剤、架橋形成基を有する尿素系架橋剤及び架橋形成基を有するチオ尿素系架橋剤から選ばれる少なくとも1種を含む、請求項12~15のいずれか1項記載の剥離剤組成物。
- 上記架橋剤が、架橋形成基を有するフェノール系架橋剤を含む請求項12~16のいずれか1項記載の剥離剤組成物。
- 上記剥離剤組成物が、酸を含む請求項12~17のいずれか1項記載の剥離剤組成物。
- 上記酸が、アリールスルホン酸、アリールスルホン酸の塩、アリールカルボン酸、アリールカルボン酸塩、鎖状又は環状アルキルスルホン酸、鎖状又は環状アルキルスルホン酸の塩、鎖状又は環状アルキルカルボン酸及び鎖状又は環状アルキルカルボン酸から選択される少なくとも1種を含む請求項18記載の剥離剤組成物。
- 半導体基板からなる第1基体と、光透過性の支持基板からなる第2基体と、上記第1基体と上記第2基体との間に、接着層及び剥離層とを備える積層体の上記剥離層を形成するために用いられる請求項12~19のいずれか1項記載の剥離剤組成物。
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US12215259B2 (en) | 2025-02-04 |
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