WO2022045026A1 - 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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- WO2022045026A1 WO2022045026A1 PCT/JP2021/030673 JP2021030673W WO2022045026A1 WO 2022045026 A1 WO2022045026 A1 WO 2022045026A1 JP 2021030673 W JP2021030673 W JP 2021030673W WO 2022045026 A1 WO2022045026 A1 WO 2022045026A1
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- polyorganosiloxane
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- adhesive
- release agent
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Classifications
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- 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
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- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
- C08L83/04—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
- 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
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- 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
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- 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
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- C08G77/04—Polysiloxanes
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
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- 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
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- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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- 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
- H01L2221/68327—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used during dicing or grinding
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- 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
- H01L2221/68386—Separation by peeling
- H01L2221/6839—Separation by peeling using peeling wedge or knife or bar
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 stacking is a technology that integrates in multiple layers while connecting with a through silicon via (TSV: through silicon via).
- TSV through silicon via
- a pre-thinned semiconductor wafer (also simply referred to here as a wafer) is adhered to a 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 this does not occur. Easy to remove.
- the semiconductor wafer is disengaged or displaced due to polishing stress when the back surface is polished. Therefore, the performance required for temporary bonding is to withstand the stress during polishing and to be easily removed after polishing. Under these circumstances, it is necessary 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 (for example, patent). Documents 1 and 2).
- a semiconductor wafer is electrically connected to a semiconductor chip via, for example, a bump ball made of a metallic conductive material, and by using a chip provided with such a bump ball, the semiconductor packaging can be miniaturized. It is planned. Since the bump ball is usually composed of a metal such as solder, it is vulnerable to a load such as pressure, and may be deformed by a load at the time of joining in a semiconductor device manufacturing process (see, for example, Patent Document 3). In the presence of such problems, with the recent progress in the semiconductor field, there is an increasing demand for a technique for suppressing deformation of a bump ball caused by a load such as pressure in a semiconductor device manufacturing process.
- Japanese Unexamined Patent Publication No. 2004-64040 Japanese Unexamined Patent Publication No. 2012-106486 International Publication No. 2018/083964 Japanese Unexamined Patent Publication No. 2013-179135 United States 2012/0329249 Gazette International Publication No. 2012/118700 Japanese Unexamined Patent Publication No. 2014-146793 International Publication 2015/190438
- the present invention has been made in view of the above circumstances, and is excellent in heat resistance at the time of joining a semiconductor substrate and a support substrate, at the time of processing the back surface of the semiconductor substrate, and is loaded with pressure or the like at the time of manufacturing a semiconductor device. It is an object of the present invention to provide a laminate provided with a release layer capable of suppressing damage to a semiconductor substrate caused by the above, and a release agent composition that provides a suitable film as such a release layer.
- the present inventors have provided a semiconductor substrate, a support substrate, a release layer provided in contact with the semiconductor substrate, and a release layer provided between the support substrate and the release layer.
- the release layer is a film obtained from a release agent composition containing a polyorganosiloxane component composed of polydimethylsiloxane, and the viscosity of the polyorganosiloxane component is set to a predetermined value.
- the present invention has been completed by finding that the above-mentioned problems can be solved by setting the thickness of the above to a predetermined range.
- Patent Documents 4 to 8 disclose techniques relating to a wafer processed body, a substrate processing method, a laminated body using a temporary adhesive, and the like, but all of the documents disclose the viscosity range and the film thickness of the present invention. It does not specifically disclose the combination of ranges or the effects produced by them.
- the present invention 1.
- the release layer is a film obtained from a release agent composition containing a polyorganosiloxane component composed of polydimethylsiloxane.
- the viscosity of the polyorganosiloxane component at 25 ° C. is 5.50 ⁇ 10 3 Pa ⁇ s to 0.75 ⁇ 10 3 Pa ⁇ s.
- a laminate, characterized in that the thickness of the film is 0.01 ⁇ m to 4.90 ⁇ m.
- 2. A laminate of 1 having a viscosity of the polyorganosiloxane component at 25 ° C.
- the adhesive layer is at least one selected from polyorganosiloxane-based adhesives, acrylic resin-based adhesives, epoxy resin-based adhesives, polyamide-based adhesives, polystyrene-based adhesives, polyimide-based adhesives, and phenol-resin-based adhesives.
- a semiconductor substrate, a support substrate, a release layer provided in contact with the semiconductor substrate, and an adhesive layer provided between the support substrate and the release layer are provided, and the thickness of the film as the release layer is increased.
- a stripping agent composition having a viscosity of the polyorganosiloxane component at 25 ° C.
- release agent compositions having a viscosity of the polyorganosiloxane component at 25 ° C. of 4.52 ⁇ 10 3 Pa ⁇ s to 0.96 ⁇ 10 3 Pa ⁇ s. 13.
- the release agent composition according to any one of 10 to 12 wherein the thickness of the film is 0.25 ⁇ m to 3.75 ⁇ m.
- the adhesive layer is at least one selected from polyorganosiloxane-based adhesives, acrylic resin-based adhesives, epoxy resin-based adhesives, polyamide-based adhesives, polystyrene-based adhesives, polyimide-based adhesives, and phenol-resin-based adhesives.
- the release agent composition according to any one of 10 to 15, which is a film obtained by using the adhesive composition containing the adhesive component (S) containing. 17. 16 release agent compositions containing a polyorganosiloxane-based adhesive, wherein the adhesive component (S) is a polyorganosiloxane-based adhesive. 18.
- the polyorganosiloxane-based adhesive provides 17 release agent compositions containing a polyorganosiloxane component (A) that is cured by a hydrosilylation reaction.
- the laminate of the present invention is a laminate including a semiconductor substrate, a support substrate, a release layer provided in contact with the semiconductor substrate, and an adhesive layer provided between the support substrate and the release layer.
- the release layer is a film obtained from a release agent composition containing a polyorganosiloxane component made of polydimethylsiloxane, which is a thermoplastic polymer having excellent heat resistance, and the viscosity of the polyorganosiloxane component at 25 ° C. is predetermined. Since the thickness of the film is adjusted to a predetermined range, the semiconductor has excellent heat resistance, and the bumps of the semiconductor substrate are deformed due to an external load such as pressure. Damage to the substrate is suppressed.
- the laminate of the present invention having such characteristics, it can be expected to manufacture a more reliable semiconductor element.
- the peeling layer is too thin, the protective function of suppressing damage to the semiconductor substrate is lowered, but if the peeling layer is too thick, the fluidity is high, and as a result, the protective function is lowered, and the polyorgano is also used. If the viscosity of the siloxane component is too low, the fluidity will be high and the protective function will be reduced, while if the viscosity of the polyorganosiloxane component is too high, the release layer will be between the adjacent functional layer such as the adhesive layer and the substrate.
- Polydimethylsiloxane which exhibits good heat resistance and peelability as a polyorganosiloxane component that constitutes a film, is presumed to have a reduced protective function as a result of deterioration of adhesion and interfacial peeling. It is presumed that the above effect was achieved by adjusting the viscosity of the component to a predetermined range and then adjusting the film thickness of the obtained film to a predetermined range.
- the laminate of the present invention includes a semiconductor substrate, a support substrate, a release layer provided so as to be in contact with the semiconductor substrate, and an adhesive layer so as to be in contact with the support substrate and the release layer.
- the semiconductor substrate is, for example, a wafer, which has a circuit surface on the front surface and is processed on the back surface.
- a silicon wafer having a diameter of 300 mm and a thickness of about 770 ⁇ m. Not limited to.
- the semiconductor substrate is provided with a functional portion such as an electrical bonding portion such as an electrode or a terminal such as a bump or a pillar on its surface, the semiconductor substrate is in contact with the semiconductor substrate.
- a functional portion such as an electrical bonding portion such as an electrode or a terminal such as a bump or a pillar on its surface
- the semiconductor substrate with bumps include silicon wafers having bumps such as ball bumps, printed bumps, stud bumps, and plated bumps, and usually have a bump height of about 1 to 200 ⁇ m, a bump diameter of 1 ⁇ m to 200 ⁇ m, and a bump pitch. It is appropriately selected from the conditions of 1 ⁇ m to 500 ⁇ m.
- plating bumps include, but are not limited to, alloy plating mainly containing Sn such as SnAg bumps, SnBi bumps, Sn bumps, and AuSn bumps.
- the pillar constituent material of the semiconductor substrate with pillars include, but are not limited to, alloys mainly composed of Sn, copper, and alloys thereof.
- the support substrate is a support (carrier) joined to support the semiconductor substrate, and specific examples thereof include, but are not limited to, a glass wafer having a diameter of 300 mm and a thickness of about 700 ⁇ m.
- the release layer provided in the laminate of the present invention is a film obtained from a release agent composition containing a polyorganosiloxane component composed of polydimethylsiloxane, and the viscosity of the polyorganosiloxane component at 25 ° C. is 5. It is .50 ⁇ 10 3 Pa ⁇ s to 0.75 ⁇ 10 3 Pa ⁇ s, and the thickness of the film is 0.01 ⁇ m to 4.90 ⁇ m.
- the upper limit of the viscosity is preferably 5.00 ⁇ 10 3 Pa. S, more preferably 4.52 ⁇ 10 3 Pa ⁇ s, and the lower limit of the viscosity is preferably 0.80 ⁇ 10 3 Pa ⁇ s, more preferably 0.96 ⁇ 10 3 Pa ⁇ s.
- the upper limit of the viscosity is even more preferably 4.02 ⁇ 10 3 Pa ⁇ s from the viewpoint of obtaining a laminate in which the substrate can be easily separated even after an external load of pressure or temperature is applied with good reproducibility.
- More preferably 3.50 ⁇ 10 3 Pa ⁇ s, and the lower limit of the viscosity is even more preferably 0.98 ⁇ 10 3 Pa ⁇ s, still more preferably 1.00 ⁇ 10 3 Pa ⁇ s. be.
- the viscosity of the polyorganosiloxane component can be measured using a leometer such as the viscoelasticity measuring device MCR302 manufactured by Anton Pearl Japan Co., Ltd.
- the upper limit of the film thickness is preferably 3.75 ⁇ m. It is more preferably 2.75 ⁇ m, and the lower limit of the thickness of the film is preferably 0.25 ⁇ m, more preferably 1.75 ⁇ m, and the substrate can be easily mounted even after an external load of pressure or temperature is applied.
- the upper limit of the film thickness is more preferably 2.70 ⁇ m, further preferably 2.65 ⁇ m, and the lower limit of the film thickness is more. It is more preferably 1.80 ⁇ m, still more preferably 1.85 ⁇ m.
- the polydimethylsiloxane used in the present invention is represented by the formula (X), and in the bulk of the polydimethylsiloxane, 3 groups of -Si (CH 3 ) or -Si (CH 3 ) 2 in the middle of the terminal or the repeating unit. It cannot be denied that there is a polydimethylsiloxane containing a trace amount of impure structure other than the -O- group.
- Nm indicates the number of repeating units and is a positive integer.
- the release agent composition comprises a polyorganosiloxane component consisting of polydimethylsiloxane, hence the polyorganosiloxane component exclusively containing polydimethylsiloxane, but in the bulk of the polydimethylsiloxane, It cannot be denied that polyorganosiloxane other than polydimethylsiloxane is contained.
- the purity of the polydimethylsiloxane used in the present invention varies depending on the molecular weight, the degree of dispersion, the purity of the raw material used, and the synthetic method to be adopted, and therefore cannot be unconditionally specified, but is usually 99% or more.
- the weight average molecular weight of the polydimethylsiloxane used in the present invention is usually 100,000 to 2,000,000, and the dispersity thereof is usually 1.0 to 10.0.
- the polyorganosiloxane component used in the present invention consists of one or more types of polydimethylsiloxane, and one or two types within the range of the above-mentioned weight average molecular weight and dispersity so as to satisfy the above-mentioned viscosity conditions.
- the above polydimethylsiloxane is appropriately selected.
- the weight average molecular weight, number average molecular weight, and dispersion of polyorganosiloxane such as polydimethylsiloxane are, for example, GPC apparatus (EcoSEC, HLC-8320GPC manufactured by Toso Co., Ltd.) and GPC column (TSKgel SuperMultipore HZ manufactured by Toso Co., Ltd.). -N, TSKgel SuperMultipore HZ-H) was used, the column temperature was 40 ° C., tetrahydrofuran was used as the eluent (eluting solvent), the flow rate (flow velocity) was 0.35 mL / min, and polystyrene (manufactured by Sigma Aldrich) was used as the standard sample. ) Can be used for measurement.
- the release agent composition may contain a solvent.
- a solvent is not particularly limited as long as the polyorganosiloxane component can be satisfactorily dissolved, and specific examples of such a good solvent include hexane, heptane, octane, nonane, and decane. Linear or branched linear or branched aliphatic hydrocarbons such as undecane, dodecane, and isododecane; cyclic such as cyclohexane, cycloheptane, cyclooctane, isopropylcyclohexane, p-menthan, etc.
- Cyclic aliphatic hydrocarbons such as aliphatic saturated hydrocarbons and cyclic aliphatic unsaturated hydrocarbons such as limonene; benzene, toluene, o-xylene, m-xylene, p-xylene, mesitylene, 1,2,4-trimethylbenzene , Kumen, aromatic hydrocarbons such as 1,4-diisopropylbenzene and p-simene; dialkyls such as MIBK (methylisobutylketone), ethylmethylketone, acetone, diisobutylketone, 2-octanone, 2-nonanone, 5-nonanone.
- MIBK methylisobutylketone
- Fat group saturated hydrocarbon ketones such as cycloalkyl ketones such as ketones and cyclohexanones, and aliphatic unsaturated hydrocarbon ketones such as alkenyl ketones such as isophorone; diethyl ethers, di (n-propyl) ethers, di (n-) Dialkyl ethers such as butyl) ethers and di (n-pentyl) ethers, ethers such as cyclic alkyl ethers such as tetrahydrofuran and dioxane; dialkyl sulfides such as diethyl sulfide, di (n-propyl) sulfide and di (n-butyl) sulfide.
- cycloalkyl ketones such as ketones and cyclohexanones
- aliphatic unsaturated hydrocarbon ketones such as alkenyl ketones such as isophorone
- diethyl ethers di (n
- Sulfates such as N, N-dimethylformamide, N, N-dimethylacetamide, N, N-dimethylisobutylamide, N-methylpyrrolidone, amides such as 1,3-dimethyl-2-imidazolidinone; acetonitrile, 3- Nitriles such as methoxypropionitrile; glycol monoalkyl ethers such as propylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, dipropylene glycol monomethyl ether and the like, glycol monoaryl ether such as diethylene glycol monophenyl ether and the like.
- Hydrogen ether alkyl alcohol such as cyclic alkyl alcohol such as cyclohexanol, diacetone alcohol, benzyl alcohol, 2-phenoxyethanol, 2-benzyloxyethanol, 3-phenoxybenzyl alcohol, tetrahydroflu Monoalcohol other than alkyl alcohols such as frill alcohol; ethylene glycol monohexyl ether, propylene glycol monobutyl ether, diethylene glycol monoethyl ether, dipropylene glycol monobutyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, diethylene glycol monoisobutyl ether, dipropylene glycol Glycol mono, such as monomethyl ether, diethylene glycol monopropyl ether (propyl carbitol), diethylene glycol monohexyl ether, 2-ethylhexyl carbitol, dipropylene glycol monopropyl ether, tripropylene glycol monomethyl ether,
- Glycol monoethers such as alkyl ethers, glycol monoaryl ethers such as 2-phenoxyethanol; ethylene glycol dibutyl ethers, diethylene glycol dimethyl ethers, diethylene glycol diethyl ethers, propylene glycol dibutyl ethers, dipropylene glycol methyl-n-propyl ethers, dipropylene glycol dimethyl ethers.
- the release agent composition may contain one or more poor solvents as well as a good solvent for the purpose of adjusting the viscosity and surface tension as long as the polyorganosiloxane component does not precipitate.
- suitable polyhydric alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, 1,3-butanediol and 2,3-butanediol; linear or branched such as methanol, ethanol and propanol.
- Chain alkyl monoalcohol ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, tripropylene glycol, hexylene glycol, triethylene glycol, 1,2-butanediol, 2,3-butanediol, 1,3-butanediol , 1,4-Butanediol, 1,5-pentanediol and other glycols and the like.
- the amount of the solvent can be usually 70% by mass to 99.9% by mass with respect to the whole composition, and therefore, a polyorganosiloxane component composed of polydimethylsiloxane.
- the amount of the solvent is 0.1% by mass to 30% by mass with respect to the entire composition.
- the release agent composition may contain a polyorganosiloxane component composed of polydimethylsiloxane and other components other than the solvent as long as the effects of the present invention are not impaired, but the film having excellent uniformity can be reproducible. From the viewpoint of obtaining well, from the viewpoint of avoiding complication of preparation of the composition, the above-mentioned release agent composition contains only a polyorganosiloxane component composed of polydimethylsiloxane and a solvent.
- the release agent composition can be produced, for example, by mixing a polyorganosiloxane component and a solvent.
- the mixing order is not particularly limited, but examples of a method for easily and reproducibly producing a release agent composition include a method of dissolving a polyorganosiloxane component in a solvent at a time and a polyorganosiloxane component. Examples thereof include, but are not limited to, a method in which a part of the above solution is dissolved in a solvent, the rest is separately dissolved in a solvent, and the obtained solutions are mixed.
- it may be appropriately heated as long as the components are not decomposed or deteriorated.
- the solvent or solution to be used may be filtered using a filter or the like on the order of submicrometer during the production of the release agent composition or after all the components are mixed. good.
- 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.
- the release agent composition of the present invention it is possible to produce a film suitable as a release layer that can be used for manufacturing a semiconductor device, for example, with good reproducibility.
- the release layer which is a film obtained from the release agent composition of the present invention, is composed of a polyorganosiloxane component composed of polydimethylsiloxane, it is not a cured film but a thermoplastic film, and such a thermoplastic film.
- the adhesive layer included in the laminate of the present invention can be, for example, a film obtained from an adhesive composition containing an adhesive component (S).
- Such an adhesive component (S) is not particularly limited as long as it is used for this kind of application, and is, for example, a polyorganosiloxane-based adhesive, an acrylic resin-based adhesive, or an epoxy resin-based adhesive. , Polyimide-based adhesives, polystyrene-based adhesives, polyimide-based adhesives, phenol resin-based adhesives and the like, but are not limited thereto.
- the adhesive component (S) shows suitable adhesive ability during processing of wafers and the like, is suitably peelable after processing, is also excellent in heat resistance, and is good with the above-mentioned release layer.
- 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 preferable example, a polyorgano that is cured by a hydrosilylation reaction.
- the siloxane component (A) is a siloxane unit (Q unit) represented by SiO 2 , a siloxane unit (M unit) represented by R 1 R 2 R 3 SiO 1/2 , and 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 and the siloxane unit (T unit) represented by R 6 SiO 3/2 , and platinum.
- the polysiloxane (A1) which includes a group metal-based catalyst (A2), is represented by a siloxane unit (Q'unit) represented by SiO 2 , and R 1'R 2'R 3'SiO 1/2 . It consists of a siloxane unit (M'unit), a siloxane unit represented by R 4'R 5'SiO 2/2 (D'unit) and a siloxane unit represented by R 6'SiO 3/2 (T'unit).
- Polyorganosiloxane (a1) containing one or more units selected from the group and at least one selected from the group consisting of the above M'units, D'units and T'units, and SiO 2 .
- siloxane unit (Q "unit) Represented by siloxane unit (Q "unit), R 1 " R 2 "R 3 " SiO 1/2 siloxane unit (M “unit), R 4 " R 5 "SiO 2/2
- a polyorganosiloxane (a2) comprising at least one selected from the group consisting of "units and T" units.
- 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'to R 6' is a group bonded to a silicon atom and independently represents an alkyl group or an alkenyl group, but at least one of R 1'to 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, still 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 tertiary 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 group, 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-n-
- 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. As a result, a cured film is formed.
- the polyorganosiloxane (a1) contains one or more units selected from the group consisting of Q'units, M'units, D'units and T'units, as well as 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 kinds of 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 include (Q'units and M'units), (D'units and M'units). (T'units and M'units), (Q'units and T'units and M'units), 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.
- Q "units, M” units, D “units and T” units are (M “units and D” units), (Q “units and M” units), and so on. (Q “unit and T” unit and M “unit), but are not limited thereto.
- the polyorganosiloxane (a1) is composed of a siloxane unit in which an alkyl group and / or an alkenyl group is bonded to the silicon atom thereof, and is an alkenyl among all substituents represented by R 1'to R 6 ' .
- the ratio of the groups is preferably 0.1 mol% to 50.0 mol%, more preferably 0.5 mol% to 30.0 mol%, and the remaining R 1'to 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 R1 "to R6 " 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, an alkenyl group and a polyorganosiloxane (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 polysiloxanes such as polyorganosiloxane (a1) and 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, It is preferably 5,000 to 50,000.
- the viscosities of the polyorganosiloxane (a1) and the polyorganosiloxane (a2) are usually 10 to 1000000 (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 viscosities of the polyorganosiloxane (a1) and the polyorganosiloxane (a2) are values 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 its curing is different from that via, for example, silanol groups, and therefore any siloxane needs to 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, the obtained adhesive layer can be appropriately peeled off with good reproducibility.
- Typical examples of such a release agent component (B) include polyorganosiloxane, and specific examples thereof include epoxy group-containing polyorganosiloxane, methyl group-containing polyorganosiloxane, and phenyl group-containing polyorganosiloxane. However, it is not limited to these.
- Preferred examples of the polyorganosiloxane as the release agent component (B) include, but are not limited to, an epoxy group-containing polyorganosiloxane, a methyl group-containing polyorganosiloxane, and a phenyl group-containing polyorganosiloxane.
- the weight average molecular weight of the polyorganosiloxane as the release agent component (B) is usually 100,000 to 2,000,000, but is preferably 200,000 to 200,000 from the viewpoint of realizing the effects of the present invention with good reproducibility. It is 1,200,000, more preferably 300,000 to 900,000, and the degree of dispersion is usually 1.0 to 10.0, but it is preferable from the viewpoint of realizing suitable peeling with good reproducibility. Is 1.5 to 5.0, more preferably 2.0 to 3.0.
- the weight average molecular weight and the degree of dispersion can be measured by the above-mentioned method.
- the viscosity of the polyorganosiloxane, which is the release agent component (B) is usually 1,000 to 2,000,000 mm 2 / s.
- epoxy group-containing polyorganosiloxane examples include those containing a siloxane unit (D 10 unit) 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, and 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 being fused with another ring, and forms a fused ring with another ring like a 1,2-epoxide cyclohexyl group. It may be an epoxy group.
- organic group containing an epoxy group examples include, but are not limited to, 3-glycidoxypropyl and 2- (3,4-epoxycyclohexyl) ethyl.
- epoxy group-containing polyorganosiloxane is, but is not limited to, an epoxy group-containing 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 D 10 unit.
- epoxy group-containing polyorganosiloxane examples include a polyorganosiloxane composed of only D 10 units, a polyorganosiloxane containing D 10 units and Q units, and D 10 units and M units.
- Polyorganosiloxane containing D 10 units and T units Polyorganosiloxane containing D 10 units and Q units and M units, Polyorganosiloxane containing D 10 units and M units and T units , D 10 units, Q units, M units, T units, polyorganosiloxane and the like.
- 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, which is a positive integer, 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, which is a positive integer, and R is an alkylene group having 1 to 10 carbon atoms.
- the methyl group-containing polyorganosiloxane may be, for example, a siloxane unit represented by R 210 R 220 SiO 2/2 (D 200 units), preferably a siloxane unit represented by R 21 R 22 SiO 2/2 (D 20 ). Units) are 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. can.
- 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 .
- methyl group-containing polyorganosiloxane is, but is not limited to, polydimethylsiloxane.
- the methyl group-containing polyorganosiloxane contains the above-mentioned siloxane unit (D 200 unit or D 20 unit), but may contain the above Q unit, M unit and / or T unit in addition to D 200 unit and D 20 unit. good.
- methyl group-containing polyorganosiloxane examples include polyorganosiloxane consisting of only D 200 units, polyorganosiloxane containing D 200 units and Q units, and D 200 units and M units.
- Polyorganosiloxane containing D 200 units and T units, Polyorganosiloxane containing D 200 units and Q units and M units, Polyorganosiloxane containing D 200 units and M units and T units , D 200 units, Q units, M units and T units include polyorganosiloxanes.
- methyl group-containing polyorganosiloxane examples include polyorganosiloxane consisting of only 20 units of D, polyorganosiloxane containing 20 units of D and Q units, and 20 units of D and M units.
- Polyorganosiloxane containing D 20 units and T units, Polyorganosiloxane containing D 20 units and Q units and M units, Polyorganosiloxane containing D 20 units and M units and T units , D 20 units, Q units, M units and T units include polyorganosiloxanes.
- 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.
- Examples of the phenyl group-containing polyorganosiloxane include those containing a siloxane unit ( D30 unit) represented by R 31 R 32 SiO 2/2 .
- 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 D 30 unit.
- phenyl group-containing polyorganosiloxane examples include a polyorganosiloxane composed of only D 30 units, a polyorganosiloxane containing D 30 units and Q units, and D 30 units and M units.
- Polyorganosiloxane containing D 30 units and T units, Polyorganosiloxane containing D 30 units and Q units and M units, Polyorganosiloxane containing D 30 units and M units and T units , D 30 units, Q units, M units and T units include polyorganosiloxanes.
- phenyl 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 can contain the adhesive component (S) and the release agent component (B) in any ratio, but in consideration of 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, and more preferably 99.9: 0.1 to 75:25.
- 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 the like, and specific examples thereof include aliphatic hydrocarbons, aromatic hydrocarbons, ketones and the like. Not limited to.
- a solvent can be used alone or in combination of two or more.
- 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 film to be produced, and the like. It is in the range of 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 used in the present invention can be adjusted by changing the types of 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 film constituent component means a component other than the solvent contained in the composition.
- the adhesive composition used in the present invention can be produced by mixing the adhesive component (S), and when used, the 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 the solvent, and mixing the obtained solution, but the present invention is limited thereto. Not done.
- it may be appropriately heated as long as the components do not decompose or deteriorate.
- the solvent or solution to be used may be filtered using a filter or the like on the order of submicrometers during the production of the adhesive composition or after mixing all the components. good.
- 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 laminate of the present invention has, for example, a first step of applying a release agent composition to the surface of a semiconductor substrate and heating it if necessary to form a release agent coating layer, and an adhesive on the surface of a support substrate.
- the second step of applying the composition and heating it if necessary to form an adhesive coating layer, and the heat treatment and depressurization of the release agent coating layer of the semiconductor substrate and the adhesive coating layer of the support substrate are performed.
- 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 the sheet-shaped coating film as an adhesive coating layer or a release agent coating layer can be adopted.
- the heating temperature of the applied adhesive composition varies depending on the type and amount of the adhesive component contained in the adhesive composition, whether or not a solvent is contained, the boiling point of the solvent used, the thickness of the desired adhesive layer, and the like. Therefore, although it cannot be unconditionally specified, it is usually 80 ° C. to 150 ° C., and the heating time is usually 30 seconds to 5 minutes. If the adhesive composition contains a solvent, the applied adhesive composition is usually heated.
- the heating temperature of the applied release agent composition varies depending on the type and amount of the acid generator, the boiling point of the solvent used, the desired thickness of the release layer, etc. From the viewpoint of achieving well, it is 80 ° C. or higher, and from the viewpoint of suppressing the decomposition of the acid generator, it is 300 ° C. or lower, and the heating time is usually in the range of 10 seconds to 10 minutes depending on the heating temperature. It will be decided as appropriate. If the release agent composition contains a solvent, the applied release agent composition is usually heated.
- 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 it is appropriately determined so as to be finally within the range of the thickness of the above-mentioned adhesive layer.
- the film thickness of the release agent coating layer obtained by applying the release agent composition and heating it is appropriately determined so as to be finally within the range of the thickness of the above-mentioned release agent layer.
- such coating layers are aligned so as to be in contact with each other, and while heat treatment, decompression treatment, or both are performed, a load in the thickness direction of the semiconductor substrate and the support substrate is applied to bring the two layers into close contact with each other.
- the laminate of the present invention can be obtained by carrying out a post-heat treatment. It should be noted that which of the heat treatment, the reduced pressure treatment, and the combined use of both treatment conditions is adopted is appropriately determined in consideration of various circumstances such as the type of the adhesive composition and the desired adhesive strength.
- the heat treatment preferably cures a type of adhesive that is not sufficiently cured by heating when forming the adhesive coating layer, from the viewpoint of softening the adhesive coating layer to realize suitable bonding with the release agent coating layer. It is usually determined appropriately from the range of 20 to 150 ° C. from the viewpoint of making the temperature. In particular, from the viewpoint of suppressing or avoiding excessive curing and unnecessary deterioration of the adhesive component (S), the temperature is preferably 130 ° C. or lower, more preferably 90 ° C. or lower, and the heating time thereof ensures suitable adhesion. From the viewpoint of expression, 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 placed 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 bonded by a reduced pressure treatment, more preferably by a combined use of a heat treatment and a reduced pressure treatment. Be done.
- the load in the thickness direction of the semiconductor substrate and the support substrate is a load that does not adversely affect the semiconductor substrate, the support substrate, and the two layers between them, and can firmly adhere them. Although not particularly limited, 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 achieving a sufficient curing rate, and preferably 260 ° C. or lower from the viewpoint of preventing deterioration of the substrate and each layer.
- the post-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 laminated body, and suppresses adverse effects on each layer due to excessive heating.
- it is usually 180 minutes or less, preferably 120 minutes or less.
- Heating can be performed using a hot plate, oven, etc.
- a hot plate either the semiconductor substrate or the support substrate of the laminate may be turned down, but from the viewpoint of achieving suitable peeling with good reproducibility, the semiconductor substrate is turned down. It is preferable to heat it afterwards.
- One purpose of the post-heat treatment is to realize a more suitable self-standing film, which is an adhesive layer, and particularly when a component that is cured by a hydrosilylation reaction is contained, the curing is suitably realized. That is.
- the method for manufacturing a processed semiconductor substrate of the present invention includes a first step of processing the semiconductor substrate of the laminate of the present invention.
- the processing applied to the semiconductor substrate in the first step 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.
- a through silicon via (TSV) or the like is formed, and then the thinned wafer is peeled off from the support substrate to form a laminated body of the wafer, which is three-dimensionally mounted.
- the back surface electrode of the wafer and the like are also formed.
- the thinning of the wafer and the TSV process are loaded with a high temperature of about 250 to 350 ° C. while being adhered to the support substrate.
- the laminate of the present invention, including the adhesive layer and the peeling layer has heat resistance to the load thereof.
- the laminate of the present invention is formed so that the above-mentioned release layer is in contact with the semiconductor substrate, the semiconductor caused by such an external load even when a high temperature or pressure is applied. Damage to the semiconductor substrate, such as deformation of bumps on the substrate, is suppressed. In this respect, it cannot be unconditionally specified because it differs depending on the type and thickness of the adhesive layer, the thickness of the release layer, etc., but specifically, in the laminated body of the present invention, the temperature is usually 200 ° C. or higher. Even under the conditions of a temperature of 250 ° C. or higher in a preferred embodiment, a condition of 300 ° C. or higher in a more preferred embodiment, and a condition of 350 ° C.
- the semiconductor substrate is damaged even under the harsh conditions of 350 ° C. or higher and a pressing force of 60 N / cm 2 or more, and more preferably 400 ° C. or higher and a pressing force of 120 N / cm 2 or more. Has been reduced.
- the processing is not limited to the above, and includes, for example, the implementation of a semiconductor component mounting process when temporarily bonded to a support substrate to support a base material for mounting a semiconductor component.
- the method for manufacturing a processed semiconductor substrate of the present invention usually includes a second step of separating (peeling) the semiconductor substrate and the support substrate.
- the substrate and the adhesive layer are detachably adhered to each other via the release layer. Therefore, the method for separating (exfoliating) the semiconductor substrate and the support substrate includes immersion in a solvent, laser peeling, and sharpening. Examples include, but are not limited to, mechanical peeling by equipment having a portion, peeling between the support and the wafer, and the like.
- the laminate can be easily peeled off at the interface between the release layer and the adhesive layer by immersing the laminate in an organic solvent.
- organic solvents are typically linear or branched such as linear or branched aliphatic saturated hydrocarbons such as hexane, heptane, octane, nonane, decane, undecane, dodecane, isododecane and the like.
- Chain aliphatic hydrocarbons cyclic aliphatic saturated hydrocarbons such as cyclohexane, cycloheptane, cyclooctane, isopropylcyclohexane, p-menthan, and cyclic aliphatic unsaturated hydrocarbons such as limonene; benzene, Aromatic hydrocarbons such as toluene, o-xylene, m-xylene, p-xylene, mesitylene, 1,2,4-trimethylbenzene, cumene, 1,4-diisopropylbenzene, p-simene; MIBK (methylisobutylketone) , Ethylmethylketone, acetone, diisobutylketone, 2-octanone, 2-nonanone, 5-nonanonone and other dialkylketones, cyclohexanone and other cycloalkylketones and other aliphatic
- Ketones such as unsaturated hydrocarbon ketones; dialkyl ethers such as diethyl ether, di (n-propyl) ether, di (n-butyl) ether, di (n-pentyl) ether, cyclic alkyl ethers such as tetrahydrofuran and dioxane, etc. Ethers; sulfides such as dialkyl sulfides such as diethyl sulfides, di (n-propyl) sulfides and di (n-butyl) sulfides; esters such as butyl acetate and pentyl acetate. These organic solvents can be used alone or in combination of two or more.
- the release layer or the adhesive layer is separated or decomposed by irradiating the release layer or the adhesive layer with the necessary light from the support substrate side, and then, for example, one of them.
- the semiconductor substrate and the support substrate can be easily separated by pulling up the substrate.
- the irradiation of light may be performed by using laser light or by using non-laser light from a light source such as a lamp.
- the method for manufacturing a processed semiconductor substrate of the present invention usually includes a third step of cleaning the separated semiconductor substrate.
- the cleaning can be performed by spraying the cleaning agent composition on the surface of the separated semiconductor substrate or immersing the separated semiconductor substrate in the cleaning agent composition. Further, the residue may be removed by using a removal tape or the like.
- the constituent elements and method elements related to the above-mentioned process of the method for manufacturing a processed semiconductor substrate of the present invention may be variously changed as long as they do not deviate from the gist of the present invention.
- the method for manufacturing a processed semiconductor substrate of the present invention may include steps other than the above-mentioned steps.
- the peeling method of the present invention separates the semiconductor substrate and the support substrate by immersing the laminate of the present invention in an organic solvent.
- Adhesive Composition [Preparation Example 1] In a 600 mL stirring container dedicated to a rotating and revolving mixer, 80 g of MQ resin (manufactured by Wacker Chemi) containing a polysiloxane skeleton and vinyl groups, and 2.52 g of linear polydimethylsiloxane (manufactured by Wacker Chemi) containing SiH groups with a viscosity of 100 mPa ⁇ s.
- MQ resin manufactured by Wacker Chemi
- linear polydimethylsiloxane manufactured by Wacker Chemi
- release agent composition [Preparation Example 2-1] 50 g of polyorganosiloxane (trade name: GENIOPLAST GUM, manufactured by Wacker Chemi) and 450 g of p-menthane (manufactured by Nippon Telpen Chemical Co., Ltd.), which are polydimethylsiloxanes with a viscosity of 5,000,000 mPa ⁇ s, are placed in a 600 mL stirring container dedicated to the rotation and revolution mixer. The mixture was stirred with a stirrer for 5 minutes. Finally, the obtained mixture was filtered through a nylon filter 300 mesh to obtain a release agent composition.
- polyorganosiloxane trade name: GENIOPLAST GUM, manufactured by Wacker Chemi
- p-menthane manufactured by Nippon Telpen Chemical Co., Ltd.
- Preparation Example 2-3 50 g of polyorganosiloxane (manufactured by Wacker Chemi, trade name AK100000) and 450 g of p-menthane (manufactured by Nippon Terpen Chemical Co., Ltd.), which are polydimethylsiloxanes with a viscosity of 1,000,000 mPa ⁇ s, are placed in a 600 mL stirring container dedicated to the rotation / revolution mixer and stirred. The machine was stirred for 5 minutes. Finally, the obtained mixture was filtered through a nylon filter 300 mesh to obtain a release agent composition.
- polyorganosiloxane manufactured by Wacker Chemi, trade name AK100000
- p-menthane manufactured by Nippon Terpen Chemical Co., Ltd.
- sample substrate [Manufacturing example 1] A substrate with bumps (wafer) was cut as a wafer (wafer) on the device side, and a sample substrate of 4 cm ⁇ 4 cm was prepared. The number of bumps per sample substrate is 5044, and the structure of the bumps is that the pillar part is copper, the cap part is tin silver (1.8 wt% silver), and the space between the pillar and the cap is nickel. ing.
- the sample substrate (silicon wafer) and the glass wafer are bonded so as to sandwich the release agent coating layer and the adhesive coating layer, and then the sample substrate is turned down and 200 on a hot plate.
- a laminate was prepared by heat treatment after 10 minutes at ° C. The bonding was performed at a temperature of 23 ° C. and a decompression degree of 1,500 Pa.
- Examples 1 to 4 and Comparative Example 3 By the same method as in Comparative Example 2, except that the release agent composition obtained in Preparation Examples 2-2 to 2-6 was used instead of the release agent composition obtained in Preparation Example 2-1. A laminate was produced.
- Examples 5 to 8, Comparative Example 4 A laminated body was prepared by the same method as in Example 1 except that the thickness of the release layer was 0.50 ⁇ m, 1.00 ⁇ m, 1.50 ⁇ m, 2.00 ⁇ m or 5.00 ⁇ m, respectively.
- the film thickness in the predetermined range of the present invention obtained from the release agent composition containing the polyorganosiloxane component consisting of polydimethylsiloxane having the viscosity in the predetermined range of the present invention.
- the laminated body having the film as a release layer the bump deformation caused by the high temperature and high pressure treatment could be suppressed.
- the support substrate can be easily removed from the laminate by simply lifting the support substrate by hand even after the high temperature and high pressure treatment, and the semiconductor substrate and the support substrate can be separated from each other. It was confirmed that it could be easily separated.
- the laminate provided with a film obtained from a release agent composition containing a polyorganosiloxane component composed of polydimethylsiloxane, which does not have a viscosity in the predetermined range of the present invention, as a release layer. Even if the film had a film thickness within the predetermined range of the present invention, bump deformation could not be suppressed.
- the film has a viscosity in the predetermined range of the present invention, polydimethyl. Even a film obtained from a release agent composition containing a polyorganosiloxane component composed of siloxane could not suppress bump deformation.
- the film is made of polydimethylsiloxane having a viscosity in the predetermined range of the present invention. Even a film obtained from a release agent composition containing a polyorganosiloxane component could not suppress bump deformation when heat-treated.
- a film having a viscosity in a predetermined range of the present invention which is obtained from a release agent composition containing a polyorganosiloxane component composed of polydimethylsiloxane and having a viscosity in a predetermined range of the present invention, is provided as a release layer.
- the bump deformation caused by the high temperature treatment could be suppressed. Further, regarding the laminates of Examples 1 and 8, even after the high temperature treatment, the support substrate can be easily removed from the laminate by simply lifting the support substrate by hand, and the semiconductor substrate and the support substrate can be easily separated. It was confirmed that it could be separated into.
- a laminate provided with a film as a release layer for obtaining a release agent composition containing a polyorganosiloxane component composed of polydimethylsiloxane and polymethylphenylsiloxane is subjected to bump deformation when heat-treated. I could't suppress it.
- the release agent composition obtained in Preparation Example 2-2 is spin-coated on the sample substrate obtained in Production Example 2 so that the final film thickness is 2.50 ⁇ m to form a release agent coating layer.
- the adhesive composition obtained in Preparation Example 1 was spin-coated on the layer so that the final film thickness was 60 ⁇ m to form an adhesive coating layer, and these two coating layers were formed.
- the obtained sample substrate was heated at 200 ° C. for 10 minutes on a hot plate with the substrate facing down to obtain a sample substrate having an adhesive layer and a release layer.
- the substrate was immersed in 9 mL of p-menthane, and the time until the peeling of the adhesive layer started was measured.
Abstract
Description
このような事情の下、研磨時の平面方向に対して高い応力(強い接着力)を持ち、取り外し時の縦方向に対して低い応力(弱い接着力)を有する性能が必要となる(例えば特許文献1,2)。
バンプボールは、ハンダ等の金属で通常構成されるため圧力等の負荷に弱く、例えば、半導体デバイスの製造プロセスにおける接合時の荷重によって変形することがある(例えば特許文献3参照)。
このような課題が存在する中、昨今の半導体分野の進展に伴い、半導体デバイスの製造プロセスにおける圧力等の負荷を原因とするバンプボールの変形を抑制する技術への要望が高まっている。
なお、特許文献4~8には、ウエハー加工体、基板の加工方法、仮接着剤を用いた積層体等に関する技術が開示されているが、いずれの文献も、本発明の粘度範囲と膜厚範囲の組み合わせやそれによって奏される効果を具体的に開示していない。
1.半導体基板、
支持基板、
上記半導体基板に接するように設けられた剥離層、及び
上記支持基板と上記剥離層との間に設けられた接着層を備える積層体であって、
上記剥離層が、ポリジメチルシロキサンからなるポリオルガノシロキサン成分を含む剥離剤組成物から得られる膜であり、
上記ポリオルガノシロキサン成分の25℃の粘度が、5.50×103Pa・s~0.75×103Pa・sであり、
上記膜の厚さが、0.01μm~4.90μmであることを特徴とする積層体、
2.上記ポリオルガノシロキサン成分の25℃の粘度が、5.00×103Pa・s~0.80×103Pa・sである1の積層体、
3.上記ポリオルガノシロキサン成分の25℃の粘度が、4.52×103Pa・s~0.96×103Pa・sである2の積層体、
4.上記膜の厚さが、0.25μm~3.75μmである1~3のいずれかの積層体、
5.上記膜の厚さが、1.75μm~2.75μmである4の積層体、
6.上記接着層が、上記支持基板と上記剥離層とに接するように設けられている1~5のいずれかの積層体、
7.上記接着層が、ポリオルガノシロキサン系接着剤、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、ポリイミド系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る膜である1~6のいずれかの積層体、
8.上記接着剤成分(S)が、ポリシロキサン系接着剤を含む7の積層体、
9.上記ポリオルガノシロキサン系接着剤が、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)を含む8の積層体、
10.半導体基板、支持基板、上記半導体基板に接するように設けられた剥離層、及び上記支持基板と上記剥離層との間に設けられた接着層を備え、上記剥離層である膜の厚さが、0.01μm~4.90μmである積層体の上記剥離層を形成するための剥離剤組成物であって、ポリジメチルシロキサンからなるポリオルガノシロキサン成分を含み、上記ポリオルガノシロキサン成分の25℃の粘度が、5.50×103Pa・s~0.75×103Pa・sである剥離剤組成物、
11.上記ポリオルガノシロキサン成分の25℃の粘度が、5.00×103Pa・s~0.80×103Pa・sである10の剥離剤組成物、
12.上記ポリオルガノシロキサン成分の25℃の粘度が、4.52×103Pa・s~0.96×103Pa・sである11の剥離剤組成物、
13.上記膜の厚さが、0.25μm~3.75μmである10~12のいずれかの剥離剤組成物、
14.上記膜の厚さが、1.75μm~2.75μmである13の剥離剤組成物、
15.上記接着層が、上記支持基板と上記剥離層とに接するように設けられている10~14のいずれかの剥離剤組成物、
16.上記接着層が、ポリオルガノシロキサン系接着剤、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、ポリイミド系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る膜である10~15のいずれかの剥離剤組成物、
17.上記接着剤成分(S)が、ポリオルガノシロキサン系接着剤を含む16の剥離剤組成物、
18.上記ポリオルガノシロキサン系接着剤が、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)を含む17の剥離剤組成物
を提供する。
好ましい態様においては、本発明の積層体は、半導体基板、支持基板、上記半導体基板に接するように設けられた剥離層、及び上記支持基板と上記剥離層とに接するように接着層を備える。
ピラー付き半導体基板のピラーの構成材料としては、Snを主体とした合金、銅やその合金等が挙げられるが、これらに限定されない。
このような溶媒としては、例えば、ポリオルガノシロキサン成分を良好に溶解できる限り特に限定されるものではないが、そのような良溶媒の具体例としては、ヘキサン、へプタン、オクタン、ノナン、デカン、ウンデカン、ドデカン、イソドデカン等の直鎖状又は分岐鎖状脂肪族飽和炭化水素等の直鎖状又は分岐鎖状脂肪族炭化水素;シクロヘキサン、シクロヘプタン、シクロオクタン、イソプロピルシクロヘキサン、p-メンタン等の環状脂肪族飽和炭化水素、リモネン等の環状脂肪族不飽和炭化水素等の環状脂肪族炭化水素;ベンゼン、トルエン、o-キシレン、m-キシレン、p-キシレン、メシチレン、1,2,4-トリメチルベンゼン、クメン、1,4-ジイソプロピルベンゼン、p-シメン等の芳香族炭化水素;MIBK(メチルイソブチルケトン)、エチルメチルケトン、アセトン、ジイソブチルケトン、2-オクタノン、2-ノナノン、5-ノナノン等のジアルキルケトン、シクロヘキサノン等のシクロアルキルケトン等の脂肪族飽和炭化水素ケトン、イソホロン等のアルケニルケトン等の脂肪族不飽和炭化水素ケトン等のケトン;ジエチルエーテル、ジ(n-プロピル)エーテル、ジ(n-ブチル)エーテル、ジ(n-ペンチル)エーテル等のジアルキルエーテル、テトラヒドロフラン、ジオキサン等の環状アルキルエーテル等のエーテル;ジエチルスルフィド、ジ(n-プロピル)スルフィド、ジ(n-ブチル)スルフィド等のジアルキルスルフィド等のスルフィド;N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、N,N-ジメチルイソブチルアミド、N-メチルピロリドン、1,3-ジメチル-2-イミダゾリジノン等のアミド;アセトニトリル、3-メトキシプロピオニトリル等のニトリル;プロピレングリコールモノメチルエーテル、ジエチレングリコールモノメチルエーテル、トリエチレングリコールモノメチルエーテル、ジプロピレングリコールモノメチルエーテル等のグリコールモノアルキルエーテル、ジエチレングリコールモノフェニルエーテル等のグリコールモノアリールエーテル等のグリコールモノ炭化水素エーテル;シクロヘキサノール等の環状アルキルアルコール等のアルキルアルコール、ジアセトンアルコール、ベンジルアルコール、2-フェノキシエタノール、2-ベンジルオキシエタノール、3-フェノキシベンジルアルコール、テトラヒドロフルフリルアルコール等のアルキルアルコール以外のモノアルコール;エチレングリコールモノヘキシルエーテル、プロピレングリコールモノブチルエーテル、ジエチレングリコールモノエチルエーテル、ジプロピレングリコールモノブチルエーテル、エチレングリコールモノブチルエーテル、ジエチレングリコールモノブチルエーテル、ジエチレングリコールモノイソブチルエーテル、ジプロピレングリコールモノメチルエーテル、ジエチレングリコールモノプロピルエーテル(プロピルカルビトール)、ジエチレングリコールモノヘキシルエーテル、2-エチルヘキシルカルビトール、ジプロピレングリコールモノプロピルエーテル、トリプロピレングリコールモノメチルエーテル、ジエチレングリコールモノメチルエーテル、トリプロピレングリコールモノブチルエーテル等のグリコールモノアルキルエーテル等、2-フェノキシエタノール等のグリコールモノアリールエーテル等のグリコールモノエーテル;エチレングリコールジブチルエーテル、ジエチレングリコールジメチルエーテル、ジエチレングリコールジエチルエーテル、プロピレングリコールジブチルエーテル、ジプロピレングリコールメチル-n-プロピルエーテル、ジプロピレングリコールジメチルエーテル、ジプロピレングリコールジエチルエーテル、ジプロピレングリコールジブチルエーテル、トリエチレングリコールジメチルエーテル、トリエチレングリコールブチルメチルエーテル、テトラエチレングリコールジメチルエーテル等のグリコールジアルキルエーテル等のグリコールジエーテル;ジプロピレングリコールモノメチルエーテルアセテート、ジエチレングリコールモノエチルエーテルアセテート、ジエチレングリコールモノブチルエーテルアセテート、プロピレングリコールモノメチルエーテルアセテート等のグリコールモノアルキルエーテルアセテート等のグリコールエーテルアセテート;エチレンカーボネート、プロピレンカーボネート、ビニレンカーボネート等の環状カーボネート;酢酸ブチル、酢酸ペンチル等のエステル等が挙げられる。これらの溶媒は、1種単独で又は2種以上組み合わせて用いることができる。
中でも、メチル基が好ましい。
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。
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。
なお、本発明の効果が損なわれない限り、いずれか一方の基板に、各組成物の塗布及び加熱をそれぞれ順次行ってもよい。
接着剤組成物が溶媒を含む場合、通常、塗布した接着剤組成物を加熱する。
剥離剤組成物が溶媒を含む場合、通常、塗布した剥離剤組成物を加熱する。
光の照射は、レーザー光を用いて行ってもよく、ランプ等の光源からの非レーザー光で用いて行ってもよい。
本発明の加工された半導体基板の製造方法は、上述の工程以外の工程を含んでもよい。
(2)レオメーター:(株)アントンパール・ジャパン製 粘弾性測定装置 MCR302
(3)真空貼り合わせ装置:ズースマイクロテック(株)製、マニュアルボンダー
(4)加熱圧着装置:ズースマイクロテック(株)製、8インチマニュアルボンダー
[調製例1]
自転公転ミキサー専用600mL撹拌容器に、ポリシロキサン骨格とビニル基とを含有するMQ樹脂(ワッカーケミ社製)80g、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)2.52g、粘度70mPa・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)5.89g、1-エチニル-1-シクロヘキサノール(ワッカーケミ社製)0.22gを入れ、撹拌機で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。
[調製例2-1]
自転公転ミキサー専用600mL撹拌容器に、粘度5000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名GENIOPLAST GUM)50gとp-メンタン(日本テルペン化学(株)製)450gを入れ、撹拌機で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、剥離剤組成物を得た。
自転公転ミキサー専用600mL撹拌容器に、粘度5000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名GENIOPLAST GUM)25gと粘度1000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名AK1000000)25gとp-メンタン(日本テルペン化学(株)製)450gを入れ、撹拌機で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、剥離剤組成物を得た。
自転公転ミキサー専用600mL撹拌容器に、粘度1000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名AK1000000)50gとp-メンタン(日本テルペン化学(株)製)450gを入れ、撹拌機で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、剥離剤組成物を得た。
自転公転ミキサー専用600mL撹拌容器に、粘度5000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名GENIOPLAST GUM)25gと粘度10000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名AK10000)25gとp-メンタン(日本テルペン化学(株)製)450gを入れ、撹拌機で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、剥離剤組成物を得た。
自転公転ミキサー専用600mL撹拌容器に、粘度5000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名GENIOPLAST GUM)25gと粘度1000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名AK1000)25gとp-メンタン(日本テルペン化学(株)製)450gを入れ、撹拌機で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、剥離剤組成物を得た。
自転公転ミキサー専用600mL撹拌容器に、粘度5000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名GENIOPLAST GUM)25gと粘度50mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名AK50)25gとp-メンタン(日本テルペン化学(株)製)450gを入れ、撹拌機で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、剥離剤組成物を得た。
自転公転ミキサー専用600mL撹拌容器に、粘度5000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名GENIOPLAST GUM)25gと粘度30000mPa・sのポリメチルフェニルシロキサンであるポリオルガノシロキサン(ゲレスト社製、商品名PMM-1043)25gとp-メンタン(日本テルペン化学(株)製)450gを入れ、撹拌機で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、剥離剤組成物を得た。
自転公転ミキサー専用600mL撹拌容器に、粘度5000000mPa・sのポリジメチルシロキサンであるポリオルガノシロキサン(ワッカーケミ社製、商品名GENIOPLAST GUM)25gと粘度500mPa・sのポリメチルフェニルシロキサンであるポリオルガノシロキサン(ゲレスト社製、商品名PMM-1023)25gとp-メンタン(日本テルペン化学(株)製)450gを入れ、撹拌機で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、剥離剤組成物を得た。
[調製例3-1~3-8]
まず、p-メンタンを用いなかった以外は、調製例2-1~2-8と同様の作業をそれぞれ行い、ポリオルガノシロキサン混合物を調製した。
[製造例1]
デバイス側のウエハー(半導体基板)としてバンプ付き基板(ウエハー)をカットし、4cm×4cmのサンプル基板を準備した。なお、1つのサンプル基板当たりのバンプの数は、5044個であり、バンプの構造はピラー部が銅で、キャップ部がスズ銀(銀1.8wt%)およびピラーとキャップの間がニッケルからなっている。
デバイス側のウエハー(半導体基板)としてシリコンウエハーをカットし、4cm×4cmのサンプル基板を準備した。
[比較例1]
調製例1で得られた接着剤組成物を、製造例1で得られたサンプル基板のバンプが存在する面に、最終的に得られる積層体中の膜厚が60μmとなるようにスピンコートし、半導体基板であるサンプル基板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、サンプル基板(シリコンウエハー)と支持基板としての100mmガラスウエハーを、接着剤塗布層を挟み込むように貼り合わせた後、サンプル基板を下にして、ホットプレート上で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。
調製例2-1で得られた剥離剤組成物を、製造例1で得られたサンプル基板のバンプが存在する面に、最終的に得られる積層体中の膜厚が2.50μmとなるようにスピンコートし、120℃で90秒間加熱し、半導体基板であるサンプル基板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ガラスウエハー(EAGLE-XG、コーニング社製、厚さ500μm、以下同様)に、最終的に得られる積層体中の膜厚が60μmとなるようにスピンコートし、支持基板であるガラス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、サンプル基板(シリコンウエハー)とガラスウエハーを、剥離剤塗布層及び接着剤塗布層を挟み込むように貼り合わせた後、サンプル基板を下にして、ホットプレート上で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。
調製例2-1で得られた剥離剤組成物の代わりに、それぞれ、調製例2-2~2-6で得られた剥離剤組成物を用いた以外は、比較例2と同様の方法で積層体を作製した。
剥離層の厚さを、それぞれ、0.50μm,1.00μm,1.50μm、2.00μm又は5.00μmとした以外は、実施例1と同様の方法で積層体を作製した。
調製例2-1で得られた剥離剤組成物の代わりに、それぞれ、調製例2-7~2-8で得られた剥離剤組成物を用いた以外は、比較例2と同様の方法で積層体を作製した。
加熱圧着装置を用いて、実施例1~5及び比較例1~4で得られた各積層体に高温高圧処理を施した。処理は次の手順で行った。
70℃に設定したステージ上に積層体の支持基板を下にして置き、温度420℃、圧力120N/cm2及び処理時間8秒間との加熱圧着条件で、半導体基板側から、半導体基板及び支持基板の垂直方向に圧力を加えつつ、加熱した。
処理後の各積層体の半導体基板の状況を支持基板であるガラス基板越しに光学顕微鏡を用いて観察し、バンプ変形の有無を目視で確認した。また、一部の積層体については、観察後、積層体からバンプ付き基板をマニュアルで剥離できるか否かを確認した。結果を表2及び3に示す。
ホットプレートを用いて、実施例1,5~8及び比較例4~6で得られた各積層体に高温処理を施した。処理は次の手順で行った。
280℃に設定したホットプレート上に積層体の支持基板を下にして置き、5分間加熱した。
処理後の各積層体の半導体基板の状況を支持基板であるガラス基板越しに光学顕微鏡を用いて観察し、バンプ変形の有無を目視で確認した。また、一部の積層体については、観察後、積層体からバンプ付き基板をマニュアルで剥離できるか否かを確認した。結果を表4及び5に示す。
[比較参考例1]
調製例1で得られた接着剤組成物を、製造例2で得られたサンプル基板に、最終的な膜厚が60μmとなるようにスピンコートして接着剤塗布層を形成し、この接着剤塗布層が形成されたサンプル基板を、基板を下にしてホットプレート上で200℃で10分間加熱して、接着層を有するサンプル基板を得た。当該基板を、p-メンタン9mLに浸漬し、接着層の剥離が開始するまでの時間を計測した。なお、5分後までに剥離が確認できない場合は、剥離なしと評価した(以下同様)。
調製例2-2で得られた剥離剤組成物を、製造例2で得られたサンプル基板に、最終的な膜厚が2.50μmとなるようにスピンコートして剥離剤塗布層を形成し、その層の上に、調製例1で得られた接着剤組成物を、最終的な膜厚が60μmとなるようにスピンコートして接着剤塗布層を形成し、この2つの塗布層が形成されたサンプル基板を、基板を下にしてホットプレート上で200℃で10分間加熱して、接着層と剥離層を有するサンプル基板を得た。当該基板を、p-メンタン9mLに浸漬し、接着層の剥離が開始するまでの時間を計測した。
Claims (18)
- 半導体基板、
支持基板、
上記半導体基板に接するように設けられた剥離層、及び
上記支持基板と上記剥離層との間に設けられた接着層を備える積層体であって、
上記剥離層が、ポリジメチルシロキサンからなるポリオルガノシロキサン成分を含む剥離剤組成物から得られる膜であり、
上記ポリオルガノシロキサン成分の25℃の粘度が、5.50×103Pa・s~0.75×103Pa・sであり、
上記膜の厚さが、0.01μm~4.90μmであることを特徴とする積層体。 - 上記ポリオルガノシロキサン成分の25℃の粘度が、5.00×103Pa・s~0.80×103Pa・sである請求項1記載の積層体。
- 上記ポリオルガノシロキサン成分の25℃の粘度が、4.52×103Pa・s~0.96×103Pa・sである請求項2記載の積層体。
- 上記膜の厚さが、0.25μm~3.75μmである請求項1~3のいずれか1項記載の積層体。
- 上記膜の厚さが、1.75μm~2.75μmである請求項4記載の積層体。
- 上記接着層が、上記支持基板と上記剥離層とに接するように設けられている請求項1~5のいずれか1項記載の積層体。
- 上記接着層が、ポリオルガノシロキサン系接着剤、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、ポリイミド系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る膜である請求項1~6のいずれか1項記載の積層体。
- 上記接着剤成分(S)が、ポリオルガノシロキサン系接着剤を含む請求項7記載の積層体。
- 上記ポリオルガノシロキサン系接着剤が、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)を含む請求項8記載の積層体。
- 半導体基板、支持基板、上記半導体基板に接するように設けられた剥離層、及び上記支持基板と上記剥離層との間に設けられた接着層を備え、上記剥離層である膜の厚さが、0.01μm~4.90μmである積層体の上記剥離層を形成するための剥離剤組成物であって、ポリジメチルシロキサンからなるポリオルガノシロキサン成分を含み、上記ポリオルガノシロキサン成分の25℃の粘度が、5.50×103Pa・s~0.75×103Pa・sである剥離剤組成物。
- 上記ポリオルガノシロキサン成分の25℃の粘度が、5.00×103Pa・s~0.80×103Pa・sである請求項10記載の剥離剤組成物。
- 上記ポリオルガノシロキサン成分の25℃の粘度が、4.52×103Pa・s~0.96×103Pa・sである請求項11記載の剥離剤組成物。
- 上記膜の厚さが、0.25μm~3.75μmである請求項10~12のいずれか1項記載の剥離剤組成物。
- 上記膜の厚さが、1.75μm~2.75μmである請求項13記載の剥離剤組成物。
- 上記接着層が、上記支持基板と上記剥離層とに接するように設けられている請求項10~14のいずれか1項記載の剥離剤組成物。
- 上記接着層が、ポリオルガノシロキサン系接着剤、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、ポリイミド系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る膜である請求項10~15のいずれか1項記載の剥離剤組成物。
- 上記接着剤成分(S)が、ポリオルガノシロキサン系接着剤を含む請求項16記載の剥離剤組成物。
- 上記ポリオルガノシロキサン系接着剤が、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)を含む請求項17記載の剥離剤組成物。
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