WO2021201047A1 - 洗浄剤組成物及び加工された半導体基板の製造方法 - Google Patents
洗浄剤組成物及び加工された半導体基板の製造方法 Download PDFInfo
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- WO2021201047A1 WO2021201047A1 PCT/JP2021/013710 JP2021013710W WO2021201047A1 WO 2021201047 A1 WO2021201047 A1 WO 2021201047A1 JP 2021013710 W JP2021013710 W JP 2021013710W WO 2021201047 A1 WO2021201047 A1 WO 2021201047A1
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- dicarboxylic acid
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- acid
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- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- XSXHNHNXEICRHE-UHFFFAOYSA-N propan-2-yloxycyclopentane Chemical compound CC(C)OC1CCCC1 XSXHNHNXEICRHE-UHFFFAOYSA-N 0.000 description 1
- MAHQPELWLUTHNP-UHFFFAOYSA-N propoxycyclohexane Chemical compound CCCOC1CCCCC1 MAHQPELWLUTHNP-UHFFFAOYSA-N 0.000 description 1
- HEPMXJPHYFIYFP-UHFFFAOYSA-N propoxycyclopentane Chemical compound CCCOC1CCCC1 HEPMXJPHYFIYFP-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229940014800 succinic anhydride Drugs 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
- 239000010409 thin film Substances 0.000 description 1
- QWWZNXBOJLOHGI-HNQUOIGGSA-N trans-3-Octenedioic acid Chemical compound OC(=O)CCC\C=C\CC(O)=O QWWZNXBOJLOHGI-HNQUOIGGSA-N 0.000 description 1
- CPVUNKGURQKKKX-BQYQJAHWSA-N trans-dec-3-enoic acid Chemical compound CCCCCC\C=C\CC(O)=O CPVUNKGURQKKKX-BQYQJAHWSA-N 0.000 description 1
- OTJVLQGVNKNLCB-NSCUHMNNSA-N trans-epsilon-octenoic acid Chemical compound C\C=C\CCCCC(O)=O OTJVLQGVNKNLCB-NSCUHMNNSA-N 0.000 description 1
- DXNCZXXFRKPEPY-UHFFFAOYSA-N tridecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCC(O)=O DXNCZXXFRKPEPY-UHFFFAOYSA-N 0.000 description 1
- SZHOJFHSIKHZHA-UHFFFAOYSA-N tridecanoic acid Chemical compound CCCCCCCCCCCCC(O)=O SZHOJFHSIKHZHA-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
- LWBHHRRTOZQPDM-UHFFFAOYSA-N undecanedioic acid Chemical compound OC(=O)CCCCCCCCCC(O)=O LWBHHRRTOZQPDM-UHFFFAOYSA-N 0.000 description 1
- ZDPHROOEEOARMN-UHFFFAOYSA-N undecanoic acid Chemical compound CCCCCCCCCCC(O)=O ZDPHROOEEOARMN-UHFFFAOYSA-N 0.000 description 1
- DYWSVUBJGFTOQC-UHFFFAOYSA-N xi-2-Ethylheptanoic acid Chemical compound CCCCCC(CC)C(O)=O DYWSVUBJGFTOQC-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/50—Solvents
- C11D7/5004—Organic solvents
- C11D7/5013—Organic solvents containing nitrogen
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/62—Quaternary ammonium compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/0005—Other compounding ingredients characterised by their effect
- C11D3/0073—Anticorrosion compositions
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2075—Carboxylic acids-salts thereof
- C11D3/2079—Monocarboxylic acids-salts thereof
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2075—Carboxylic acids-salts thereof
- C11D3/2082—Polycarboxylic acids-salts thereof
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/43—Solvents
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/265—Carboxylic acids or salts thereof
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/267—Heterocyclic compounds
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3209—Amines or imines with one to four nitrogen atoms; Quaternized amines
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3263—Amides or imides
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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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
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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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/02068—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers
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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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical means
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/14—Hard surfaces
- C11D2111/22—Electronic devices, e.g. PCBs or semiconductors
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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
- 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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- 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
- H01L2221/68318—Auxiliary support including means facilitating the separation of a device or wafer from the auxiliary support
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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
- H01L2221/6834—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 to protect an active side of a device or wafer
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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
Definitions
- the present invention is a cleaning agent composition and a processed cleaning agent composition used for removing adhesive residue after peeling off temporary adhesion by an adhesive layer obtained by using, for example, a polysiloxane-based adhesive formed on a semiconductor substrate.
- the present invention relates to a method for manufacturing a semiconductor substrate.
- 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.
- the temperature may reach a high temperature of 150 ° C. or higher in the processing process, and heat resistance is also required.
- a polysiloxane-based adhesive capable of having these performances is mainly used as a temporary adhesive.
- adhesive residue often remains on the surface of the substrate after the thinned substrate is peeled off, but in order to avoid problems in the subsequent steps.
- a cleaning agent composition for removing this residue and cleaning the surface of a semiconductor substrate has been developed (for example, Patent Documents 1 and 2), and in the recent semiconductor field, a new cleaning agent composition has been developed. There is always a desire for.
- Patent Document 1 discloses a siloxane resin remover containing a polar aprotic solvent and a quaternary ammonium hydroxide
- Patent Document 2 discloses a cured resin remover containing alkyl-ammonium fluoride.
- a semiconductor wafer is electrically connected to a semiconductor chip via, for example, a bump ball made of a conductive material of metal, and by using a chip provided with such a bump ball, the semiconductor packaging can be miniaturized. It is planned.
- bump balls from metals such as copper and tin have poor corrosion resistance, there is a problem that they are damaged by a cleaning agent composition for removing adhesive residues on a support or a wafer (Patent Documents). 3) It is also one of the required properties for the detergent composition that the bump balls are not corroded.
- the present invention has been made in view of the above circumstances. For example, when cleaning a substrate such as a semiconductor substrate, it is used as an adhesive residue after peeling off the temporary adhesion by the adhesive layer obtained by using a polysiloxane-based adhesive. On the other hand, it is an object of the present invention to provide a cleaning agent composition which exhibits good detergency and suppresses corrosiveness to metals such as bump balls, and a method for producing a processed semiconductor substrate.
- a polysiloxane-based adhesive particularly a siloxane-based adhesive containing a polysiloxane component that is cured by a hydrocarbonification reaction.
- an aliphatic saturated hydrocarbon compound monocarboxylic acid an aliphatic saturated hydrocarbon compound dicarboxylic acid or an acid anhydride thereof, or carbon having a carbon number of a predetermined value or more is used.
- monocarboxylic acid an aliphatic unsaturated hydrocarbon compound having 7 to 40, dicarboxylic acid, an aliphatic unsaturated hydrocarbon compound having 7 to 40 carbon atoms, or an acid anhydride thereof, a carboxylic acid having a low carbon number or the like can be used. It was found that the decrease in cleaning speed due to the addition of a metal corrosion inhibitor can be suppressed, and as a result, excellent cleaning ability can be realized and corrosion of metals such as bump balls can be suppressed. , The present invention has been completed.
- a cleaning composition used for removing an adhesive residue which comprises a quaternary ammonium salt, a metal corrosion inhibitor, and an organic solvent, and the metal corrosion inhibitor has 7 to 40 carbon atoms.
- a cleaning agent composition comprising 7 to 40 aliphatic unsaturated hydrocarbon compounds, a dicarboxylic acid or an acid anhydride thereof.
- the metal corrosion inhibitor is an aliphatic saturated hydrocarbon compound monocarboxylic acid having 7 to 40 carbon atoms, an aliphatic saturated hydrocarbon compound dicarboxylic acid anhydride having 7 to 40 carbon atoms, or an aliphatic unsaturated compound having 7 to 40 carbon atoms.
- the detergent composition of 1 containing lauric acid, dodecane diic acid or octadecenyl succinic anhydride as the metal corrosion inhibitor. 5. The detergent composition according to any one of 1 to 4, wherein the quaternary ammonium salt is a halogen-containing quaternary ammonium salt. 6. The detergent composition of 5, wherein the halogen-containing quaternary ammonium salt is a fluorine-containing quaternary ammonium salt. 7. The detergent composition of No. 6, wherein the fluorine-containing quaternary ammonium salt is tetraammonium fluoride (hydrogen). 8.
- the cleaning agent composition in a method for producing a processed semiconductor substrate, which comprises a third step of peeling the semiconductor substrate and a fourth step of removing the adhesive residue remaining on the peeled semiconductor substrate with a cleaning agent composition.
- a method for producing a processed semiconductor substrate which comprises using the cleaning agent composition according to any one of 1 to 9 as a substance.
- an adhesive layer obtained by using a polysiloxane-based adhesive particularly a cured film obtained from a siloxane-based adhesive containing a polysiloxane component that is cured by a hydrosilylation reaction. It is possible to easily clean a substrate such as a semiconductor substrate to which an adhesive residue is attached after peeling off the temporary adhesive by the layer in a short time and easily while suppressing corrosion of a metal such as a bump ball. Therefore, high efficiency and good production of semiconductor devices can be expected.
- the detergent composition of the present invention contains a quaternary ammonium salt.
- the quaternary ammonium salt is composed of a quaternary ammonium cation and an anion, and is not particularly limited as long as it is used for this kind of application.
- Typical examples of such a quaternary ammonium cation include a tetra (hydrocarbon) ammonium cation.
- hydroxide ion (OH -); fluoride ions (F -), chlorine ion (Cl -), bromine ion (Br -), iodide ion (I -) halide such as ion ; tetrafluoroborate (BF 4 -); hexafluorophosphate (PF 6 -) and the like include, but are not limited to.
- the quaternary ammonium salt is preferably a halogen-containing quaternary ammonium salt, and more preferably a fluorine-containing quaternary ammonium salt.
- the halogen atom may be contained in the cation or the anion, but is preferably contained in the anion.
- the fluorinated quaternary ammonium salt is tetra (hydrocarbon) ammonium fluoride.
- hydrocarbon group in tetra (hydrocarbon) ammonium fluoride include an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, and 6 to 20 carbon atoms.
- the aryl group of the above can be mentioned.
- the tetra (hydrocarbon) ammonium fluoride comprises tetraalkylammonium fluoride.
- tetraalkylammonium fluoride examples include tetramethylammonium fluoride, tetraethylammonium fluoride, tetrapropylammonium fluoride, tetrabutylammonium fluoride (also referred to as tetrabutylammonium fluoride), and the like. Not limited. Of these, tetrabutylammonium fluoride is preferable.
- a hydrate may be used as the quaternary ammonium salt such as tetra (hydrocarbon) ammonium fluoride. Further, the quaternary ammonium salt such as tetra (hydrocarbon) ammonium fluoride may be used alone or in combination of two or more.
- the amount of the quaternary ammonium salt is not particularly limited as long as it is dissolved in the solvent contained in the detergent composition, but is usually 0.1 to 30% by mass with respect to the detergent composition.
- the cleaning agent composition of the present invention comprises an aliphatic saturated hydrocarbon compound monocarboxylic acid having 7 to 40 carbon atoms, an aliphatic saturated hydrocarbon compound dicarboxylic acid having 7 to 40 carbon atoms or an acid anhydride thereof, and 7 to 40 carbon atoms.
- the cleaning agent composition of the present invention contains, as a metal corrosion inhibitor, an aliphatic saturated hydrocarbon compound monocarboxylic acid having 7 to 40 carbon atoms, an aliphatic saturated hydrocarbon compound dicarboxylic acid having 7 to 40 carbon atoms, and a carbon number of carbon atoms.
- 7-40 aliphatic saturated hydrocarbon compound dicarboxylic acid anhydride 7-40 carbon number aliphatic unsaturated hydrocarbon compound monocarboxylic acid
- Aliphatic saturated hydrocarbon compound with 7 to 40 carbon atoms Monocarboxylic acid is a compound in which one hydrogen atom of an aliphatic saturated hydrocarbon compound having 6 to 39 carbon atoms is replaced with a carboxy group, and is linear or branched. , But it may be cyclic, but from the viewpoint of realizing excellent detergency and excellent corrosion suppression ability with good reproducibility, linear or branched is preferable, and linear is more preferable.
- the aliphatic saturated hydrocarbon compound monocarboxylic acid having 7 to 40 carbon atoms can be used alone or in combination of two or more.
- Specific examples thereof include 1-heptanecarboxylic acid, 1-octanecarboxylic acid, 2-octanecarboxylic acid, 3-octanecarboxylic acid, 4-octanecarboxylic acid, 1-nonanecarboxylic acid, 2-nonanecarboxylic acid, 3-.
- the aliphatic saturated hydrocarbon compound dicarboxylic acid having 7 to 40 carbon atoms is obtained by replacing two hydrogen atoms of the aliphatic saturated hydrocarbon compound having 5 to 38 carbon atoms with carboxy groups, respectively, and is linear or branched. , But it may be cyclic, but from the viewpoint of realizing excellent detergency and excellent corrosion suppression ability with good reproducibility, linear or branched is preferable, and linear is more preferable.
- the aliphatic saturated hydrocarbon compound dicarboxylic acid having 7 to 40 carbon atoms can be used alone or in combination of two or more.
- Specific examples thereof include 1,1-pentanedicarboxylic acid, 1,2-pentanedicarboxylic acid, 1,3-pentanedicarboxylic acid, 1,4-pentanedicarboxylic acid, 1,5-pentanedicarboxylic acid, and 2,2-.
- Pentandicarboxylic acid 2,3-pentanedicarboxylic acid, 2,4-pentanedicarboxylic acid, 3,3-pentanedicarboxylic acid, 1,6-hexanedicarboxylic acid, 1,1-hexanedicarboxylic acid, 1,2-hexanedicarboxylic acid Acid, 1,7-heptanedicarboxylic acid, 1,1-heptanedicarboxylic acid, 1,2-heptandicarboxylic acid, 1,8-octanedicarboxylic acid, 1,1-octanedicarboxylic acid, 1,2-octanedicarboxylic acid, 1,9-nonandicarboxylic acid, 1,1-nonandicarboxylic acid, 1,2-nonandicarboxylic acid, 1,10-decandicarboxylic acid (dodecanedioic acid), 1,1-decandicarboxylic acid, 1,2-decan
- the aliphatic saturated hydrocarbon compound dicarboxylic acid anhydride having 7 to 40 carbon atoms is an acid anhydride derived by the intramolecular dehydration condensation of the aliphatic saturated hydrocarbon compound dicarboxylic acid, and is linear, branched, or cyclic.
- a linear or branched form is preferable, and a linear form is more preferable.
- the aliphatic saturated hydrocarbon compound dicarboxylic acid anhydride having 7 to 40 carbon atoms can be used alone or in combination of two or more.
- Specific examples thereof include 1,1-pentanedicarboxylic acid anhydride, 1,2-pentanedicarboxylic acid anhydride, 1,6-hexanedicarboxylic acid anhydride, 1,1-hexanedicarboxylic acid anhydride, 1,2-.
- the carboxylic acid is a compound in which one hydrogen atom of an aliphatic unsaturated hydrocarbon compound having 6 to 39 carbon atoms is replaced with a carboxy group, and is linear or branched. It may be in the form or cyclic, and may be either an alkene or an alkyne, but a linear or branched alkene carboxylic acid is preferable from the viewpoint of achieving excellent detergency and excellent corrosion suppression ability with good reproducibility. Chained alkene carboxylic acids are more preferred.
- the aliphatic unsaturated hydrocarbon compound carboxylic acid having 7 to 40 carbon atoms can be used alone or in combination of two or more.
- the aliphatic unsaturated hydrocarbon compound dicarboxylic acid having 7 to 40 carbon atoms is obtained by replacing two hydrogen atoms of the aliphatic unsaturated hydrocarbon compound having 5 to 38 carbon atoms with carboxy groups, respectively, and is linear. It may be branched or cyclic, and may be either an alkene or an alkyne, but a linear or branched alkene dicarboxylic acid is preferable from the viewpoint of achieving excellent detergency and excellent corrosion suppression ability with good reproducibility. Linear alkenedicarboxylic acids are more preferred.
- the aliphatic unsaturated hydrocarbon compound dicarboxylic acid having 7 to 40 carbon atoms can be used alone or in combination of two or more.
- the aliphatic unsaturated hydrocarbon compound dicarboxylic acid anhydride having 7 to 40 carbon atoms is an acid anhydride derived by the intramolecular dehydration condensation of the above-mentioned aliphatic unsaturated hydrocarbon compound dicarboxylic acid, and is linear or branched.
- Cyclic, or alkene or alkyne, but linear or branched alkene dicarboxylic acid anhydrides are preferable from the viewpoint of achieving excellent detergency and excellent corrosion suppression ability with good reproducibility.
- Linear alkenedicarboxylic acid anhydrides are more preferred.
- the aliphatic unsaturated hydrocarbon compound dicarboxylic acid anhydride having 7 to 40 carbon atoms can be used alone or in combination of two or more.
- Specific examples thereof include cis-2-butene-1,1-dicarboxylic acid anhydride, cis-2-butene-1,4-dicarboxylic acid anhydride, and trans-2-butene-1,1-dicarboxylic acid anhydride.
- the metal corrosion inhibitor is used.
- a mixture of these isomers may be used.
- the acid anhydride which is a metal corrosion inhibitor, preferably has a succinic anhydride structure.
- the metal corrosion inhibitor contains such a structure, a cleaning agent composition having both excellent cleaning ability and excellent corrosion suppressing ability can be obtained with even better reproducibility.
- these two carboxy groups of a dicarboxylic acid having a carboxy group on each of two adjacent carbon atoms form a 5-membered ring by intramolecular dehydration condensation, and give a succinic anhydride structure.
- the carbon number of the acid and its acid anhydride is preferably 35 or less, more preferably 30 respectively, from the viewpoint of ensuring the solubility in the organic solvent contained in the cleaning agent composition and suppressing the precipitation of the metal corrosion inhibitor, respectively.
- it is more preferably 25 or less, still more preferably 20 or less, and from the viewpoint of obtaining a cleaning agent composition having excellent detergency with good reproducibility, it is preferably 8 or more, more preferably 9 or more, still more preferably 10 or more. Is.
- an aliphatic saturated hydrocarbon compound monocarboxylic acid having 7 to 40 carbon atoms an aliphatic saturated hydrocarbon compound dicarboxylic acid anhydride having 7 to 40 carbon atoms, or an aliphatic acid group having 7 to 40 carbon atoms.
- An unsaturated hydrocarbon compound dicarboxylic acid anhydride is preferable, an aliphatic saturated hydrocarbon compound monocarboxylic acid having 7 to 40 carbon atoms and an aliphatic unsaturated hydrocarbon compound dicarboxylic acid anhydride having 7 to 40 carbon atoms are more preferable, and laurin. Acids, dodecanedioic acids or octadecenylsuccinic anhydrides are even more preferred.
- the amount of the metal corrosion inhibitor is not particularly limited as long as it is dissolved in the organic solvent contained in the detergent composition, but is usually 0.01 to 10% by mass with respect to the detergent composition.
- the cleaning agent composition of the present invention comprises an aliphatic saturated hydrocarbon compound monocarboxylic acid having 7 to 40 carbon atoms, an aliphatic saturated hydrocarbon compound dicarboxylic acid having 7 to 40 carbon atoms and an acid anhydride thereof, and 7 to 40 carbon atoms.
- An aliphatic unsaturated hydrocarbon compound monocarboxylic acid, and other metal corrosion inhibitors other than the metal corrosion inhibitor consisting of any of the aliphatic unsaturated hydrocarbon compound dicarboxylic acid having 7 to 40 carbon atoms and its acid anhydride. May include.
- the detergent composition of the present invention contains an organic solvent.
- Such an organic solvent is not particularly limited as long as it is used for this kind of application and dissolves the quaternary ammonium salt and the metal corrosion inhibitor, but it has excellent detergency. From the viewpoint of obtaining a detergent composition having good reproducibility and from the viewpoint of satisfactorily dissolving a quaternary ammonium salt or a metal corrosion inhibitor to obtain a detergent composition having excellent uniformity, one or more of them are preferable. Includes amide-based solvents.
- An example of a preferable amide-based solvent is an acid amide derivative represented by the formula (Z).
- R 0 represents an ethyl group, a propyl group or an isopropyl group, and an ethyl group and an isopropyl group are preferable, and an ethyl group is more preferable.
- R A and R B independently of one another represent an alkyl group having 1 to 4 carbon atoms.
- the alkyl group having 1 to 4 carbon atoms may be linear, branched or cyclic, and specifically, a methyl group, an ethyl group, a propyl group, an isopropyl group, a cyclopropyl group, an n-butyl group or an isobutyl group.
- R A and R B are both preferably a methyl group or an ethyl group, both methyl group is more preferable.
- Examples of the acid amide derivative represented by the formula (Z) include N, N-dimethylpropionamide, N, N-diethylpropionamide, N-ethyl-N-methylpropionamide, N, N-dimethylbutyric acid amide, N, Examples thereof include N-diethylbutyric acid amide, N-ethyl-N-methylbutyric acid amide, N, N-dimethylisobutyric acid amide, N, N-diethylisobutyric acid amide, N-ethyl-N-methylisobutyric acid amide and the like.
- N, N-dimethylpropionamide and N, N-dimethylisobutyramide are preferable, and N, N-dimethylpropionamide is more preferable.
- the acid amide derivative represented by the formula (Z) may be synthesized by a substitution reaction between the corresponding carboxylic acid ester and amine, or a commercially available product may be used.
- a preferable amide-based solvent is a lactam compound represented by the formula (Y).
- alkyl group having 1 to 6 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an n-butyl group and the like, and an alkylene group having 1 to 6 carbon atoms.
- alkylene group having 1 to 6 carbon atoms include, but are not limited to, a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, a hexamethylene group, and the like.
- lactam compound represented by the above formula (Y) examples include ⁇ -lactam compound, ⁇ -lactam compound, ⁇ -lactam compound, ⁇ -lactam compound and the like, and these may be used alone or Two or more types can be used in combination.
- the lactam compound represented by the above formula (Y) contains 1-alkyl-2-pyrrolidone (N-alkyl- ⁇ -butyrolactam), and in a more preferred embodiment, N- It comprises methylpyrrolidone (NMP) or N-ethylpyrrolidone (NEP), and in a more preferred embodiment, it comprises N-methylpyrrolidone (NMP). Twice
- the detergent composition of the present invention may contain one or more other organic solvents different from the above-mentioned amide compounds.
- Such other organic solvents are used for this kind of use, and are not particularly limited as long as they are organic solvents compatible with the above-mentioned amide compounds.
- alkylene glycol dialkyl ethers examples include alkylene glycol dialkyl ethers.
- alkylene glycol dialkyl ethers include ethylene glycol dimethyl ether (also referred to as dimethoxyethane, the same applies hereinafter), ethylene glycol diethyl ether (diethoxyethane), ethylene glycol dipropyl ethane (dipropoxyetane), and ethylene glycol dibutyl ether (dimethoxyethane).
- butoxyetan propylene glycol dimethyl ether (dimethoxypropane), propylene glycol diethyl ether (diethoxypropane), propylene glycol dipropyl ether (dipropoxypropane) and the like, but are not limited thereto.
- the alkylene glycol dialkyl ether can be used alone or in combination of two or more.
- Another example of the other preferable solvent is an aromatic hydrocarbon compound, and a specific example thereof is an aromatic hydrocarbon compound represented by the formula (1).
- alkyl group having 1 to 6 carbon atoms examples include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an isobutyl group, an s-butyl group, a t-butyl group and the like. Can be mentioned.
- s represents the number of substituents R 100 substituting on the benzene ring, a 2 or 3.
- the aromatic hydrocarbon compound represented by the formula (1) is an aromatic hydrocarbon compound represented by the formula (1-1) or (1-2).
- R 100 represents an alkyl group having 1 to 6 carbon atoms independently of each other, but the total carbon number of the three alkyl groups having 1 to 6 carbon atoms of R 100 in the formula (1-1) is 3 or more. , and the total number of carbon atoms in two alkyl groups having 1 to 6 carbon atoms R 100 in formula (1-2) is 3 or more.
- aromatic hydrocarbon compound represented by the formula (1) examples include 1,2,3-trimethylbenzene, 1,2,4-trimethylbenzene, 1,2,5-trimethylbenzene, 1,3. 5-trimethylbenzene (mesitylene), 4-ethyltoluene, 4-n-bropyrtoluene, 4-isobropyrtoluene, 4-n-butyltoluene, 4-s-butyltoluene, 4-isobutyltoluene, 4-t- Examples include, but are not limited to, butyltoluene and the like. Of these, mesitylene and 4-t-butyltoluene are preferable.
- a cyclic structure-containing ether compound can be mentioned.
- the cyclic structure-containing ether include a cyclic ether compound, a cyclic alkyl chain alkyl ether compound, a cyclic alkyl branched alkyl ether compound, and a di (cyclic alkyl) ether compound.
- a cyclic ether compound is one in which at least one of the carbon atoms constituting the ring of the cyclic hydrocarbon compound is replaced with an oxygen atom.
- an epoxy compound in which a chain, branched or cyclic saturated hydrocarbon compound is epoxidized that is, two carbon atoms and oxygen atoms adjacent to each other form a three-membered ring
- a cyclic saturated hydrocarbon compound having 4 or more carbon atoms is preferable.
- the carbon number of the epoxy compound is not particularly limited, but is usually 4 to 40, preferably 6 to 12.
- the number of epoxy groups is not particularly limited, but is usually 1 to 4, preferably 1 or 2.
- epoxy compounds include 1,2-epoxy-n-butane, 1,2-epoxy-n-pentane, 1,2-epoxy-n-hexane, 1,2-epoxy-n-heptane, 1 , 2-Epoxy-n-octane, 1,2-epoxy-n-nonane, 1,2-epoxy-n-decane, 1,2-epoxy-n-eicosane and other epoxy chain or branched saturated hydrocarbon compounds , 1,2-epoxycyclopentane, 1,2-epoxycyclohexane, 1,2-epoxycycloheptane, 1,2-epoxycyclooctane, 1,2-epoxycyclononane, 1,2-epoxycyclodecane, 1, Examples include, but are not limited to, epoxy cyclic saturated hydrocarbon compounds such as 2-epoxycycloeicosane.
- the number of carbon atoms of the cyclic ether compound other than the epoxy is not particularly limited, but is usually 3 to 40, preferably 4 to 8.
- the number of oxygen atoms (ether groups) is not particularly limited, but is usually 1 to 3, preferably 1 or 2.
- cyclic ether compound other than the epoxy examples include oxacyclobutane (oxetan), oxacyclopentane (tetrahydrofuran), oxacyclohexane and other oxacyclic saturated hydrocarbon compounds, 1,3-dioxacyclopentane, and 1,3-.
- examples thereof include, but are not limited to, dioxacyclic saturated hydrocarbon compounds such as dioxacyclohexane (1,3-dioxane) and 1,4-dioxacyclohexane (1,4-dioxane). Twice
- the cyclic alkyl chain alkyl ether compound is composed of a cyclic alkyl group, a chain alkyl group, and an ether group connecting both of them, and the number of carbon atoms thereof is not particularly limited, but is usually 4 to 40. Yes, preferably 5 to 20.
- the cyclic alkyl branched alkyl ether compound is composed of a cyclic alkyl group, a branched alkyl group, and an ether group connecting both of them, and the number of carbon atoms thereof is not particularly limited, but is usually 6 to 40. Yes, preferably 5 to 20.
- the di (cyclic alkyl) ether compound is composed of two cyclic alkyl groups and an ether group connecting the two, and the number of carbon atoms thereof is not particularly limited, but is usually 6 to 40. It is preferably 10 to 20.
- a cyclic alkyl chain alkyl ether compound and a cyclic alkyl branched alkyl ether compound are preferable, and a cyclic alkyl chain alkyl ether compound is more preferable.
- the chain alkyl group is a group derived by removing a hydrogen atom at the terminal of a linear aliphatic hydrocarbon, and the number of carbon atoms thereof is not particularly limited, but is usually 1 to 40, which is preferable. Is 1 to 20. Specific examples thereof include methyl group, ethyl group, 1-n-propyl group, 1-n-butyl group, 1-n-pentyl group, 1-n-hexyl group, 1-n-heptyl group and 1-n. -The octyl group, the 1-n-nonyl group, the 1-n-decyl group and the like can be mentioned, but the present invention is not limited thereto.
- a branched alkyl group is a group derived by removing a hydrogen atom of a linear or branched aliphatic hydrocarbon, and is other than a chain alkyl group, and the number of carbon atoms thereof is particularly limited. Although not, it is usually 3 to 40, preferably 3 to 20. Specific examples thereof include, but are not limited to, an isopropyl group, an isobutyl group, an s-butyl group, a t-butyl group and the like.
- a cyclic alkyl group is a group derived by removing a hydrogen atom on a carbon atom constituting a ring of a cyclic aliphatic hydrocarbon, and the number of carbon atoms thereof is not particularly limited, but is usually 3 to 40. Yes, preferably 5 to 20. Specific examples thereof include a monocycloalkyl group such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cycloheptyl group, and a cyclohexyl, a bicyclo [2.2.1] heptane-1-yl group, and a bicyclo [2.2.1].
- Heptan-2-yl group bicyclo [2.2.1] heptane-7-yl group, bicyclo [2.2.2] octane-1-yl group, bicyclo [2.2.2] octane-2- Examples thereof include, but are not limited to, an yl group and a bicycloalkyl group such as a bicyclo [2.2.2] octane-7-yl group.
- cyclic alkyl chain alkyl ether compound examples include cyclopentyl methyl ether (CPME), cyclopentyl ethyl ether, cyclopentyl propyl ether, cyclopentyl butyl ether, cyclohexyl methyl ether, cyclohexyl ethyl ether, cyclohexyl propyl ether, cyclohexyl butyl ether and the like. Yes, but not limited to these.
- Specific examples of the cyclic alkyl branched alkyl ether compound include, but are not limited to, cyclopentyl isopropyl ether and cyclopentyl t-butyl ether.
- di (cyclic alkyl) ether compound examples include, but are not limited to, dicyclopentyl ether, dicyclohexyl ether, cyclopentylcyclohexyl ether and the like.
- the amount of the other organic solvent different from the above-mentioned amide compound is uniform with that of the above-mentioned amide compound without precipitation or separation of components such as a quaternary ammonium salt and a metal corrosion inhibitor contained in the detergent composition. As long as it is mixed with the above, it is usually determined appropriately in 95% by mass or less in the solvent contained in the detergent composition.
- the detergent composition of the present invention usually contains only an organic solvent as a solvent.
- only the organic solvent means that only the organic solvent is intentionally used as the solvent, and does not deny the existence of water contained in the organic solvent and other components.
- the detergent composition of the present invention is characterized in that it contains substantially no water.
- substantially free of water means that water is not blended, and as described above, it does not exclude water as a hydrate of other components and a trace amount of water mixed with the components.
- the water content of the obtained detergent composition is determined by whether or not the organic solvent used is pre-dehydrated, the organic solvent used, and the like. It cannot be unconditionally specified because it differs depending on whether the solid content has high hygroscopicity, whether the quaternary ammonium salt used is hydrate, etc., but it is usually less than 5% by mass, preferably less than 4% by mass, and more. It is preferably less than 3% by mass.
- the water content can be calculated by, for example, the Karl Fischer method using a trace moisture measuring device CA-200 (manufactured by Mitsubishi Chemical Analytech Co., Ltd.).
- the detergent composition of the present invention is obtained by mixing the quaternary ammonium salt, the metal corrosion inhibitor, the organic solvent and, if necessary, other components, and the order of mixing the components is as follows.
- the mixture can be mixed in any order as long as problems such as precipitation and liquid separation that cannot achieve the object of the present invention occur. That is, a part of all the components of the detergent composition may be mixed in advance and then the remaining components may be mixed, or all the components may be mixed at once. If necessary, the detergent composition may be filtered, or the supernatant may be recovered while avoiding insoluble components after mixing, and the supernatant may be used as the detergent composition. Further, when the component used is, for example, hygroscopic or deliquescent, all or part of the work of preparing the detergent composition may be carried out under an inert gas.
- the cleaning agent composition of the present invention described above, the polysiloxane-based adhesive remaining on the semiconductor substrate such as a silicon wafer can be effectively removed, so that the semiconductor substrate can be cleaned in a short time. Not only that, damage to metals such as bumps on the semiconductor substrate can be suppressed, and high-efficiency production of good semiconductor elements can be expected.
- the cleaning speed when the adhesive layer obtained from the adhesive composition is brought into contact with the cleaning agent composition of the present invention for 5 minutes at room temperature (23 ° C.), the film thickness is reduced before and after the contact.
- the etching rate [ ⁇ m / min] calculated by measuring and dividing the reduced portion by the washing time is usually 4.5 [ ⁇ m / min] or more, and in a preferred embodiment 5.0 [ ⁇ m / min]. As described above, it is 5.5 [ ⁇ m / min] or more in a more preferable embodiment, 6.0 [ ⁇ m / min] or more in a more preferable embodiment, and 6.5 [ ⁇ m / min] or more in a further preferable embodiment.
- the cleaning sustainability when 1 g of the adhesive solid obtained from the adhesive composition is brought into contact with 2 g of the cleaning agent composition of the present invention at room temperature (23 ° C.), the cleaning agent composition of the present invention is used. Usually dissolves most of the adhesive solid in 12 to 24 hours, dissolves and completely dissolves the adhesive solid in 2 to 12 hours in a preferred embodiment, and dissolves the adhesive solid in 1 to 2 hours in a more preferred embodiment. Cut off.
- the cleaning agent composition of the present invention described above, it is possible to effectively remove the polysiloxane-based adhesive remaining on a substrate such as a semiconductor substrate, and as a result, the substrate can be cleaned in a short time. Not only that, when the substrate has bump balls, corrosion of the bump balls can be avoided or reduced, and as a result, highly efficient and highly reliable substrate cleaning can be performed.
- the cleaning agent composition of the present invention can be used for cleaning the surface of various substrates such as semiconductor substrates.
- the object to be cleaned is not limited to a silicon semiconductor substrate, for example, a germanium substrate, a gallium-arsenic substrate, a gallium-phosphorus substrate, a gallium-arsenic-aluminum substrate, an aluminum-plated silicon substrate, a copper-plated silicon substrate, and the like.
- Various substrates such as silver-plated silicon substrate, gold-plated silicon substrate, titanium-plated silicon substrate, silicon nitride film-formed silicon substrate, silicon oxide film-formed silicon substrate, polyimide film-formed silicon substrate, glass substrate, quartz substrate, liquid crystal substrate, organic EL substrate, etc. Also includes.
- the cleaning agent composition of the present invention in a semiconductor process, there is a use in a method for manufacturing a processed semiconductor substrate such as thinning used in a semiconductor packaging technology such as TSV. Specifically, a first step of manufacturing a laminate including a semiconductor substrate, a support substrate, and an adhesive layer obtained from an adhesive composition, a second step of processing the semiconductor substrate of the obtained laminate, and processing.
- the cleaning agent of the present invention is used as a cleaning agent composition in a production method including a third step of peeling the semiconductor substrate later and a fourth step of removing the adhesive residue remaining on the peeled semiconductor substrate with the cleaning agent composition. The composition is used.
- the adhesive composition used for forming the adhesive layer in the first step the above-mentioned compositions of various adhesives can be used, but the cleaning agent composition of the present invention is obtained from a polysiloxane-based adhesive. It is effective for removing the adhesive layer to be obtained, and is more effective for removing the adhesive layer obtained from the polysiloxane-based adhesive containing the component (A) that is cured by the hydrosilylation reaction. Therefore, hereinafter, an example in which the adhesive layer is removed by the cleaning agent composition of the present invention when a semiconductor substrate processed by using an adhesive layer obtained by using a polysiloxane-based adhesive (adhesive composition) is produced.
- the present invention is not limited to this.
- the first step is a step of applying an adhesive composition to the surface of the semiconductor substrate or the support substrate to form an adhesive coating layer, and the semiconductor substrate and the support substrate via the adhesive coating layer.
- a load in the thickness direction of the semiconductor substrate and the support substrate is applied to bring them into close contact with each other, and then post-heat treatment is performed to form a laminate.
- the first step is, for example, a step of applying an adhesive composition to the surface of a semiconductor substrate and heating it to form an adhesive coating layer, and a release agent composition on the surface of the support substrate.
- the step of applying an object and heating it to form a release agent coating layer, and the adhesive coating layer of the semiconductor substrate and the release agent coating layer of the support substrate are subjected to at least one of heat treatment and decompression treatment.
- the step of forming a laminate by applying a load in the thickness direction of the semiconductor substrate and the support substrate to bring them into close contact with each other and then performing a post-heat treatment is included.
- the procedure of applying the adhesive composition to the semiconductor substrate and the release agent composition to the support substrate and heating them has been described, the application of the adhesive composition and the release agent composition to one of the substrates and the application of the release agent composition The heating may be performed sequentially.
- the semiconductor substrate is a wafer and the support substrate is a support.
- the target to which the adhesive composition is applied may be either one or both of the semiconductor substrate and the support substrate.
- the wafer examples include, but are not limited to, silicon wafers and glass wafers having a diameter of 300 mm and a thickness of about 770 ⁇ m.
- the cleaning agent composition of the present invention can effectively clean a bumped semiconductor substrate while suppressing damage to the bumps by a cleaning method using the cleaning agent composition.
- Specific examples of such a semiconductor substrate with bumps include a silicon wafer having bumps such as ball bumps, printing bumps, stud bumps, and plating bumps, and usually, the bump height is about 1 to 200 ⁇ m and the bump diameter is 1 to 200 ⁇ m.
- Bump pitch is appropriately selected from the conditions of 1 to 500 ⁇ m.
- Specific examples of the 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 support is not particularly limited, and examples thereof include a silicon wafer having a diameter of 300 mm and a thickness of about 700 ⁇ m, but the support is not limited thereto.
- the polysiloxane-based adhesive contains a polyorganosiloxane component (A) that is cured by a hydrosilylation reaction as an adhesive component, and in a more preferable embodiment, it is cured by a hydrosilylation reaction.
- polyorganosiloxane component (A) is a siloxane unit (Q unit) 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
- Polysiloxane (A1) containing one or more units selected from the group consisting of a siloxane unit (D unit) represented by / 2 and a siloxane unit (T unit) represented by R 6 SiO 3/2.
- the polysiloxane (A1) is a siloxane unit represented by SiO 2 (Q 'units), R 1' at R 2 'R 3' SiO 1/2 represented by siloxane unit (M 'units), R 4' R 5 'siloxane units (D represented by SiO 2/2' units) and R 6 'siloxane units (T represented by SiO 3/2' units ), And at least one polyorganosiloxane (a1) selected from the group consisting of M'units, D'units and T'units.
- a polyorganosiloxane (a2) containing at least one selected from the group consisting of units, D "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 ' ⁇ 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 " is a group or atom bonded to a silicon atom and independently represents 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 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-
- a methyl group is preferable.
- the cyclic alkyl group 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-cyclo
- 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, the alkenyl group and the polyorganosiloxane (a2) contained in the polyorganosiloxane (a1) are used.
- the molar ratio with the hydrogen atom constituting the included Si—H bond 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, number average molecular weight, and 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 SuperMulti-HZ 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 polysiloxane (A1) described above.
- 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 of 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 of the present invention, 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.
- the present invention is not limited to these.
- the weight average molecular weight of the polyorganosiloxane as the release agent component (B) is usually 100,000 to 20,000,000, 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 9,000,000.
- 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 being fused with another ring, and a fused ring with another ring such as a 1,2-epoxide cyclohexyl group may be used. It may be an epoxy group formed.
- organic group containing an epoxy group examples 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, 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 polyorganosiloxane consisting of only D 10 units, polyorganosiloxane containing D 10 units and Q units, and poly containing D 10 units and M 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 the adhesive composition. From the viewpoint of suppressing precipitation in the above, it is preferably 100,000 or less.
- epoxy group-containing polyorganosiloxane are represented by the trade name CMS-227 (manufactured by Gerest, weight average molecular weight 27,000) represented by the formula (A-1) and the formula (A-2).
- Product name ECMS-327 (manufactured by Gerest, weight average molecular weight 28,800)
- product name KF-101 represented by the formula (A-3)
- Product name KF-1001 represented by formula (A-4)
- product name KF-1005 represented by formula (A-5)
- trade name X-22-343 manufactured by Shinetsu Chemical Industry Co., Ltd., weight average molecular weight 2,400 represented by formula
- R is an alkylene group having 1 to 10 carbon atoms.
- R is an alkylene group having 1 to 10 carbon atoms.
- R is an alkylene group having 1 to 10 carbon atoms.
- R is an alkylene group having 1 to 10 carbon atoms.
- R is an alkylene group having 1 to 10 carbon atoms.
- the methyl group-containing polyorganosiloxane includes, 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 preferred 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 includes 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, and poly containing D 200 units and M units.
- methyl group-containing polyorganosiloxane examples include polyorganosiloxane consisting of only D 20 units, polyorganosiloxane containing D 20 units and Q units, and poly containing D 20 units and M units.
- the viscosity of the methyl group-containing polyorganosiloxane is usually 1,000 to 2,000,000 mm 2 / s, but is preferably 10,000 to 1,000,000 mm 2 / s.
- the methyl group-containing polyorganosiloxane is typically a dimethylsilicone oil composed of polydimethylsiloxane.
- the kinematic viscosity can be measured with a kinematic viscometer. It can also be obtained by dividing the viscosity (mPa ⁇ s) by the density (g / cm 3).
- methyl group-containing polyorganosiloxane examples include WACKERSILICONE FLUID AK series manufactured by Wacker Chemi, and dimethyl silicone oil (KF-96L, KF-96A, KF-96, KF-96H, KF-) manufactured by Shin-Etsu Chemical Co., Ltd. 69, KF-965, KF-968), cyclic dimethyl silicone oil (KF-995) and the like, but are not limited thereto.
- Examples of the phenyl group-containing polyorganosiloxane include those containing a siloxane unit (D 30 units) 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 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, and poly containing D 30 units and M units.
- the weight average molecular weight of the phenyl group-containing polyorganosiloxane is usually 1,500 to 500,000, but is preferably 100,000 or less from the viewpoint of suppressing precipitation in the adhesive composition.
- the adhesive composition of 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 more preferred embodiment, the release agent component (B).
- a polyorganosiloxane component (A) that is cured by a hydrosilylation reaction
- the release agent component (B) As a polyorganosiloxane.
- the adhesive composition of the present invention can contain the adhesive component (S) and the release agent component (B) in an arbitrary ratio, but in consideration of the balance between the adhesiveness and the release property, the component (S)
- the ratio of the component (B) to the component (B) is preferably 99.995: 0.005 to 30:70, more preferably 99.9: 0.1 to 75:25 in terms of mass ratio. 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 of 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.
- a solvent can be used alone or in combination of two or more.
- the adhesive composition of 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. It is in the range of about 10 to 90% by mass with respect to the entire object.
- the viscosity of the adhesive composition of 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 film constituent component means a component other than the solvent contained in the composition.
- the adhesive composition of the present invention can be produced by mixing an adhesive component (S), a release agent component (B) when used, 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.
- 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 adhesive composition or after mixing all the components.
- release agent composition examples include compositions containing a release agent component used for this type of application.
- 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, which 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 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.
- it is 120 ° C. or higher, and from the viewpoint of preventing excessive curing, it is preferably 260 ° C. or lower, and the heating time is usually 1 to 10 minutes. Heating can be performed using a hot plate, an oven, or the like.
- the film thickness of the adhesive coating layer obtained by applying the adhesive composition and heating it is usually 5 to 500 ⁇ m.
- the film thickness of the release agent coating layer obtained by applying the release agent composition and heating it is usually 5 to 500 ⁇ m.
- the heat treatment is usually performed at 20 to 150 ° C. in consideration of the viewpoint of softening the adhesive coating layer to realize suitable bonding with the release agent coating layer, the viewpoint of realizing suitable curing of the release agent coating layer, and the like. It is appropriately determined from the range of.
- the temperature is preferably 130 ° C. or lower, more preferably 90 ° C. or lower, and the heating time thereof is the adhesive ability or peeling ability. From the viewpoint of reliably expressing the above, 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 reduced pressure treatment may be performed by lowering the semiconductor substrate, the adhesive coating layer and the support substrate, or the semiconductor substrate, the adhesive coating layer, the release agent coating layer and the support substrate under an atmospheric pressure of 10 to 10,000 Pa.
- the time of the reduced pressure treatment is usually 1 to 30 minutes.
- the substrate and the coating layer or the coating layers are bonded to each other, preferably by a reduced pressure treatment, more preferably by a combined heat treatment and a reduced pressure treatment.
- the load in the thickness direction of the semiconductor substrate and the support substrate is not particularly limited as long as it is a load that does not adversely affect the semiconductor substrate and the support substrate and the layer between them and can firmly adhere them, but is usually limited. It is in the range of 10 to 1000 N.
- the post-heating temperature of the post-heat treatment 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, the adhesive component, the release agent component, and the like. ..
- the heating time is usually 1 minute or more from the viewpoint of realizing suitable bonding of the wafer by curing, and more preferably 5 minutes or more from the viewpoint of stabilizing the physical properties of the adhesive, and the adhesive layer due to excessive heating. From the viewpoint of avoiding adverse effects on the vehicle, 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 processing of the back surface opposite to the circuit surface of the front surface of the semiconductor substrate can be mentioned, and typically, the thinning of the wafer by polishing the back surface of the wafer can be mentioned.
- 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.
- the adhesive layer contained in the laminate used in the present invention usually has heat resistance to the heat.
- a wafer having a diameter of 300 mm and a thickness of about 770 ⁇ m can be thinned to a thickness of about 4 to 80 ⁇ m by polishing the back surface opposite to the circuit surface on the front surface.
- Methods for peeling the laminate include, but are not limited to, solvent peeling, laser peeling, mechanical peeling with equipment having a sharp portion, peeling between the support and the wafer, and the like.
- the peeling is performed after processing such as thinning.
- the adhesive adheresive layer
- the adhesive residue on the substrate can be sufficiently removed by cleaning the surface of the semiconductor substrate to which the residual adhesive is attached with the detergent composition of the present invention.
- the fourth step is a step of removing the adhesive residue remaining on the semiconductor substrate after peeling with the cleaning agent composition of the present invention.
- the adhesive residue is removed by immersing in the cleaning agent composition of the present invention and, if necessary, also using means such as ultrasonic cleaning.
- ultrasonic cleaning the conditions are appropriately determined in consideration of the surface condition of the substrate, but usually, the substrate is cleaned by cleaning under the conditions of 20 kHz to 5 MHz, 10 seconds to 30 minutes. The adhesive residue remaining on the top can be sufficiently removed.
- the method for manufacturing a processed substrate of the present invention includes the above-mentioned first to fourth steps, but may include steps other than these steps.
- the adhesive residue is removed by immersing the substrate in various solvents or performing tape peeling, if necessary, before cleaning with the cleaning agent composition of the present invention. You may.
- 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.
- the device used in the present invention is as follows.
- Viscometer Rotational viscometer TVE-22H manufactured by Toki Sangyo Co., Ltd.
- Stirrer AS ONE Mix Rotor Variable 1-1186-12
- Stirrer H AS ONE heating type locking mixer HRM-1
- Contact type film thickness meter Wafer thickness measuring device WT-425 manufactured by Tokyo Seimitsu Co., Ltd.
- Adhesive Composition [Preparation Example 1] A base polymer (manufactured by Wacker Chemi) consisting of a vinyl group-containing linear polydimethylsiloxane having a viscosity of 200 mPa ⁇ s and a vinyl group-containing MQ resin (manufactured by Wacker Chemi) as (a1) in a 600 mL stirring container dedicated to a rotation / revolution mixer, and (a2) having a viscosity of 100 mPa ⁇ .
- a base polymer manufactured by Wacker Chemi
- a vinyl group-containing linear polydimethylsiloxane having a viscosity of 200 mPa ⁇ s
- a vinyl group-containing MQ resin manufactured by Wacker Chemi
- Example 2 To 5 g of tetrabutylammonium fluoride trihydrate (manufactured by Kanto Chemical Co., Ltd.), 0.5 g of dodecane diic acid and 95 g of N, N-dimethylpropionamide were added and stirred to obtain a cleaning agent composition.
- Example 3 To 5 g of tetrabutylammonium fluoride trihydrate (manufactured by Kanto Chemical Co., Ltd.), 0.5 g of lauric acid and 95 g of N, N-dimethylpropionamide were added and stirred to obtain a cleaning agent composition.
- the chips were placed in a stainless steel dish having a diameter of 9 cm, 7 mL of the obtained detergent composition was added, the lid was closed, and the chips were placed on a stirrer H and stirred and washed at 23 ° C. for 5 minutes. After washing, the chips were taken out, washed with isopropanol and pure water, dried at 150 ° C. for 1 minute, and the film thickness was measured again with a contact film thickness meter. Then, the film thickness decrease was calculated before and after cleaning, and the reduced amount was divided by the cleaning time to calculate the etching rate [ ⁇ m / min], which was used as an index of detergency. The results are shown in Table 1.
- the cleaning agent composition of the comparative example did not show the cleaning speed as much as the cleaning agent composition of the present invention.
- suitable removal of adhesive residue on the semiconductor substrate can be expected while suppressing or avoiding corrosion of bump balls.
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Abstract
Description
特許文献1には、極性非プロトン性溶剤と第四級アンモニウム水酸化物とを含むシロキサン樹脂の除去剤が開示され、特許文献2には、フッ化アルキル・アンモニウムを含む硬化樹脂除去剤が開示されているが、さらに効果的な洗浄剤組成物の出現が望まれている。
ところで、半導体ウエハーは、例えば金属の導電性材料からなるバンプボールを介して半導体チップと電気的に接続しており、このようなバンプボールを備えるチップを用いることで、半導体パッケージングの小型化が図られている。
この点、銅やスズといった金属からバンプボールは、耐腐食性に乏しいことから、支持体やウエハーの接着剤残留物を除去するための洗浄剤組成物で損傷を受けるという課題があり(特許文献3)、バンプボールを腐食しないことも、洗浄剤組成物についての要求特性の一つである。
1.接着剤残留物を除去するために用いられる洗浄剤組成物であって、第四級アンモニウム塩と、金属腐食抑制剤と、有機溶媒とを含み、上記金属腐食抑制剤が、炭素数7~40の脂肪族飽和炭化水素化合物モノカルボン酸、炭素数7~40の脂肪族飽和炭化水素化合物ジカルボン酸若しくはその酸無水物、炭素数7~40の脂肪族不飽和炭化水素化合物モノカルボン酸又は炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸若しくはその酸無水物からなることを特徴とする洗浄剤組成物、
2.上記金属腐食抑制剤が、炭素数7~40の脂肪族飽和炭化水素化合物モノカルボン酸、炭素数7~40の脂肪族飽和炭化水素化合物ジカルボン酸無水物又は炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸無水物を含む1の洗浄剤組成物、
3.上記金属腐食抑制剤が、炭素数7~40の脂肪族飽和炭化水素化合物モノカルボン酸又は炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸無水物を含む2の洗浄剤組成物、
4.上記金属腐食抑制剤が、ラウリン酸、ドデカン2酸又はオクタデセニルコハク酸無水物を含む1の洗浄剤組成物、
5.上記第四級アンモニウム塩が、含ハロゲン第四級アンモニウム塩である1~4のいずれかの洗浄剤組成物、
6.上記含ハロゲン第四級アンモニウム塩が、含フッ素第四級アンモニウム塩である5の洗浄剤組成物、
7.上記含フッ素第四級アンモニウム塩が、フッ化テトラ(炭化水素)アンモニウムである6の洗浄剤組成物、
8.上記フッ化テトラ(炭化水素)アンモニウムが、フッ化テトラメチルアンモニウム、フッ化テトラエチルアンモニウム、フッ化テトラプロピルアンモニウム及びフッ化テトラブチルアンモニウムからなる群から選ばれる少なくとも1種を含む7の洗浄剤組成物、
9.上記接着剤残留物が、ヒドロシリル化反応により硬化する成分(A)を含む接着剤組成物から得られた接着層の接着剤残留物である1~8のいずれかの洗浄剤組成物、
10.バンプボールを有する半導体基板と、支持基板と、接着剤組成物から得られる接着層とを備える積層体を製造する第1工程、得られた積層体の半導体基板を加工する第2工程、加工後に半導体基板を剥離する第3工程、及び剥離した半導体基板上に残存する接着剤残留物を洗浄剤組成物により除去する第4工程を含む、加工された半導体基板の製造方法において、上記洗浄剤組成物として1~9のいずれかの洗浄剤組成物を用いることを特徴とする、加工された半導体基板の製造方法
を提供する。
本発明の洗浄剤組成物は、第四級アンモニウム塩を含む。
第四級アンモニウム塩は、第四級アンモニウムカチオンと、アニオンとから構成されるものであって、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い。
このような第四級アンモニウムカチオンとしては、典型的には、テトラ(炭化水素)アンモニウムカチオンが挙げられる。一方、それと対を成すアニオンとしては、水酸化物イオン(OH-);フッ素イオン(F-)、塩素イオン(Cl-)、臭素イオン(Br-)、ヨウ素イオン(I-)等のハロゲンイオン;テトラフルオロホウ酸イオン(BF4 -);ヘキサフルオロリン酸イオン(PF6 -)等が挙げられるが、これらに限定されない。
第四級アンモニウム塩中、ハロゲン原子は、カチオンに含まれていても、アニオンに含まれていてもよいが、好ましくはアニオンに含まれる。
フッ化テトラ(炭化水素)アンモニウムにおける炭化水素基の具体例としては、炭素数1~20のアルキル基、炭素数2~20のアルケニル基、炭素数2~20のアルキニル基、炭素数6~20のアリール基等が挙げられる。
より好ましい一態様においては、フッ化テトラ(炭化水素)アンモニウムは、フッ化テトラアルキルアンモニウムを含む。
フッ化テトラアルキルアンモニウムの具体例としては、フッ化テトラメチルアンモニウム、フッ化テトラエチルアンモニウム、フッ化テトラプロピルアンモニウム、フッ化テトラブチルアンモニウム(テトラブチルアンモニウムフルオリドともいう)等が挙げられるが、これらに限定されない。中でも、フッ化テトラブチルアンモニウムが好ましい。
第四級アンモニウム塩の量は、洗浄剤組成物に含まれる溶媒に溶解する限り特に制限されるものではないが、洗浄剤組成物に対して、通常0.1~30質量%である。
すなわち、本発明の洗浄剤組成物は、金属腐食抑制剤として、炭素数7~40の脂肪族飽和炭化水素化合物モノカルボン酸、炭素数7~40の脂肪族飽和炭化水素化合物ジカルボン酸、炭素数7~40の脂肪族飽和炭化水素化合物ジカルボン酸無水物、炭素数7~40の脂肪族不飽和炭化水素化合物のモノカルボン酸、炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸及び炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸無水物からなる群から選ばれる少なくとも1種を含む。
このような比較的長い脂肪族炭化水素鎖を有し、且つ1つのカルボキシ基(-COOH)を有する化合物又は2つのカルボキシ基を有する化合物若しくはその酸無水物を金属腐食抑制剤として用いることで、洗浄剤組成物が含む有機溶媒への金属腐食抑制剤の良好な溶解性を保つことによってその析出を制御しつつ、優れた洗浄能と優れた腐食抑制能の両立を実現できる。
炭素数7~40の脂肪族飽和炭化水素化合物モノカルボン酸は、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。
炭素数7~40の脂肪族飽和炭化水素化合物ジカルボン酸は、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。
炭素数7~40の脂肪族飽和炭化水素化合物ジカルボン酸無水物は、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。
炭素数7~40の脂肪族不飽和炭化水素化合物カルボン酸は、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。
炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸は、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。
炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸無水物は、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。
なお、互いに隣り合う2つの炭素原子それぞれの上にカルボキシ基を有するジカルボン酸のこれら2つのカルボキシ基が、分子内で脱水縮合して5員環を構成し、コハク酸無水物構造を与える。
このような有機溶媒は、この種の用途に用いられ、且つ、上記第四級アンモニウム塩と上記金属腐食抑制剤を溶解するものであれば特に限定されるものではないが、優れた洗浄性を有する洗浄剤組成物を再現性よく得る観点、第四級アンモニウム塩や金属腐食抑制剤を良好に溶解させ、均一性に優れる洗浄剤組成物を得る観点から、好ましくは、1種又は2種以上のアミド系溶媒を含む。
このようなその他の有機溶媒は、この種の用途に用いられるものであって、上述のアミド化合物と相溶性がある有機溶媒であれば特に限定されるものではない。
アルキレングリコールジアルキルエーテルの具体例としては、エチレングリコールジメチルエーテル(ジメトキシエタンともいう、以下同様)、エチレングリコールジエチルエーテル(ジエトキシエタン)、エチレングリコールジプロピルエタン(ジプロポキシエタン)、エチレングリコールジブチルエーテル(ジブトキシエタン)、プロピレングリコールジメチルエーテル(ジメトキシプロパン)、プロピレングリコールジエチルエーテル(ジエトキシプロパン)、プロピレングリコールジプロピルエーテル(ジプロポキシプロパン)等が挙げられるが、これらに限定されない。
アルキレングリコールジアルキルエーテルは1種単独で又は2種以上を組み合わせて用いることができる。
sは、ベンゼン環に置換する置換基R100の数を表し、2又は3である。
中でも、メシチレン、4-t-ブチルトルエンが好ましい。
典型的には、鎖状、分岐状又は環状の飽和炭化水素化合物がエポキシ化されたエポキシ化合物(すなわち、互いに隣り合う2つの炭素原子と酸素原子とが3員環を構成しているもの)や、炭素数が4以上の環状炭化水素化合物(但し、芳香族炭化水素化合物を除く。)の環を構成する炭素原子が酸素原子に置換されたエポキシ以外の環状エーテル化合物(エポキシ化合物は除かれる。以下同様。)が挙げられ、中でも、このような炭素数が4以上の環状炭化水素化合物としては、炭素数が4以上の環状飽和炭化水素化合物が好ましい。
エポキシ基の数は、特に限定されるものではないが、通常1~4であり、好ましくは1又は2である。
酸素原子(エーテル基)の数は、特に限定されるものではないが、通常1~3であり、好ましくは1又は2である。
環状アルキル分岐状アルキルエーテル化合物は、環状アルキル基と分岐状アルキル基と両者を連結するエーテル基とからなるものであり、その炭素数は、特に限定されるものではないが、通常6~40であり、好ましくは5~20である。
ジ(環状アルキル)エーテル化合物は、2つの環状アルキル基と、両者を連結するエーテル基とからなるものであり、その炭素数は、特に限定されるものではないが、通常6~40であり、好ましくは10~20である。
中でも、上記エポキシ以外の環状エーテル化合物としては、環状アルキル鎖状アルキルエーテル化合物、環状アルキル分岐状アルキルエーテル化合物が好ましく、環状アルキル鎖状アルキルエーテル化合物がより好ましい。
その具体例としては、メチル基、エチル基、1-n-プロピル基、1-n-ブチル基、1-n-ペンチル基、1-n-ヘキシル基、1-n-ヘプチル基、1-n-オクチル基、1-n-ノニル基、1-n-デシル基等が挙げられるが、これらに限定されない。
その具体例としては、イソプロピル基、イソブチル基、s-ブチル基、t-ブチル基等が挙げられるが、これらに限定されない。
その具体例としては、シクロプロピル基、シクロブチル基、シクロペンチル基、シクロヘプチル基、シクロヘキシル等のモノシクロアルキル基、ビシクロ[2.2.1]ヘプタン-1-イル基、ビシクロ[2.2.1]ヘプタン-2-イル基、ビシクロ[2.2.1]ヘプタン-7-イル基、ビシクロ[2.2.2]オクタン-1-イル基、ビシクロ[2.2.2]オクタン-2-イル基、ビシクロ[2.2.2]オクタン-7-イル基等のビシクロアルキル基等が挙げられるが、これらに限定されない。
環状アルキル分岐状アルキルエーテル化合物の具体例としては、シクロペンチルイソプロピルエーテル、シクロペンチルt-ブチルエーテル等を挙げることができるが、これらに限定されない。
ジ(環状アルキル)エーテル化合物の具体例としては、ジシクロペンチルエーテル、ジシクロヘキシルエーテル、シクロペンチルシクロヘキシルエーテル等を挙げることができるが、これらに限定されない。
換言すると、本発明の洗浄剤組成物は、実質的に水を含有しない点に特徴がある。ここで、実質的に水を含有しないとは、水を配合しないことであり、上述したとおり、他の成分の水和物としての水や成分と共に混入する微量水分を排除するものではない。
有機溶媒のみを溶媒として用いて本発明の洗浄剤組成物を調製する場合、得られる洗浄剤組成物の含水量は、用いる有機溶媒が予め脱水されたものであるか否か、用いる有機溶媒や固形分の吸湿性が高いか否か、用いる第四級アンモニウム塩が水和物か否か等に応じて異なるため一概に規定できないが、通常5質量%未満、好ましくは4質量%未満、より好ましくは3質量%未満である。なお、含水量は、例えば微量水分測定装置CA-200型((株)三菱ケミカルアナリテック製)を用いたカールフィッシャー法で、算出できる。
具体的には、洗浄速度については、室温(23℃)において、接着剤組成物から得られる接着層を本発明の洗浄剤組成物に5分間接触させた場合において接触の前後で膜厚減少を測定し、減少した分を洗浄時間で割ることにより算出されるエッチングレート[μm/min]が、通常4.5[μm/分]以上であり、好ましい態様においては5.0[μm/分]以上、より好ましい態様においては5.5[μm/分]以上、より一層好ましい態様においては6.0[μm/分]以上、更に好ましい態様においては6.5[μm/分]以上である。
また、洗浄持続力については、室温(23℃)において、接着剤組成物から得られる接着性固体1gを、本発明の洗浄剤組成物2gに接触させた場合において、本発明の洗浄剤組成物は、通常12~24時間で接着性固体の大部分を溶解し、好ましい態様においては2~12時間で接着性固体を溶解し切り、より好ましい態様においては1~2時間で接着性固体を溶解し切る。
具体的には、半導体基板と、支持基板と、接着剤組成物から得られる接着層とを備える積層体を製造する第1工程、得られた積層体の半導体基板を加工する第2工程、加工後に半導体基板を剥離する第3工程、及び剥離した半導体基板上に残存する接着剤残留物を洗浄剤組成物により除去する第4工程を含む製造方法において、洗浄剤組成物として本発明の洗浄剤組成物が使用される。
従って、以下、ポリシロキサン系接着剤(接着剤組成物)を用いて得られる接着層を用いて加工された半導体基板を製造する際に、当該接着層を本発明の洗浄剤組成物によって取り除く例について説明するが、本発明は、これに限定されるわけではない。
その他の態様においては、かかる第1工程は、例えば、半導体基板の表面に接着剤組成物を塗布し、それを加熱して接着剤塗布層を形成する工程と、支持基板の表面に剥離剤組成物を塗布し、それを加熱して剥離剤塗布層を形成する工程と、半導体基板の接着剤塗布層と、支持基板の剥離剤塗布層とを、加熱処理及び減圧処理の少なくとも一方を実施しながら、半導体基板及び支持基板の厚さ方向の荷重をかけて密着させ、その後、後加熱処理を実施することにより、積層体とする工程とを含む。なお、接着剤組成物を半導体基板に、剥離剤組成物を支持基板にそれぞれ塗布し、加熱する手順を説明したが、いずれか一方の基板に、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い。
上記各態様において、加熱処理、減圧処理、両者の併用のいずれの処理条件を採用するかは、接着剤組成物の種類や剥離剤組成物の具体的組成、両組成物から得られる膜の相性、膜厚、求める接着強度等の各種事情を勘案した上で決定される。
特に、本発明の洗浄剤組成物は、これを用いた洗浄方法によって、バンプ付き半導体基板を、そのバンプへのダメージを抑制しつつ、効果的に洗浄できる。
このようなバンプ付き半導体基板の具体例としては、ボールバンプ、印刷バンプ、スタッドバンプ、めっきバンプ等のバンプを有するシリコンウエハーが挙げられ、通常、バンプ高さ1~200μm程度、バンプ径1~200μm、バンプピッチ1~500μmという条件から適宜選択される。
めっきバンプの具体例としては、SnAgバンプ、SnBiバンプ、Snバンプ、AuSnバンプ等のSnを主体とした合金めっき等が挙げられるが、これらに限定されない。
環状アルキル基の具体例としては、シクロプロピル基、シクロブチル基、1-メチル-シクロプロピル基、2-メチル-シクロプロピル基、シクロペンチル基、1-メチル-シクロブチル基、2-メチル-シクロブチル基、3-メチル-シクロブチル基、1,2-ジメチル-シクロプロピル基、2,3-ジメチル-シクロプロピル基、1-エチル-シクロプロピル基、2-エチル-シクロプロピル基、シクロヘキシル基、1-メチル-シクロペンチル基、2-メチル-シクロペンチル基、3-メチル-シクロペンチル基、1-エチル-シクロブチル基、2-エチル-シクロブチル基、3-エチル-シクロブチル基、1,2-ジメチル-シクロブチル基、1,3-ジメチル-シクロブチル基、2,2-ジメチル-シクロブチル基、2,3-ジメチル-シクロブチル基、2,4-ジメチル-シクロブチル基、3,3-ジメチル-シクロブチル基、1-n-プロピル-シクロプロピル基、2-n-プロピル-シクロプロピル基、1-i-プロピル-シクロプロピル基、2-i-プロピル-シクロプロピル基、1,2,2-トリメチル-シクロプロピル基、1,2,3-トリメチル-シクロプロピル基、2,2,3-トリメチル-シクロプロピル基、1-エチル-2-メチル-シクロプロピル基、2-エチル-1-メチル-シクロプロピル基、2-エチル-2-メチル-シクロプロピル基、2-エチル-3-メチル-シクロプロピル基等のシクロアルキル基、ビシクロブチル基、ビシクロペンチル基、ビシクロヘキシル基、ビシクロヘプチル基、ビシクロオクチル基、ビシクロノニル基、ビシクロデシル基等のビシクロアルキル基等が挙げられるが、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、エポキシ基含有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。
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、エポキシ基含有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。
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。
メチル基含有ポリオルガノシロキサンと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。
なお、メチル基含有ポリオルガノシロキサンは、典型的には、ポリジメチルシロキサンからなるジメチルシリコーンオイルである。この粘度の値は、動粘度で示され、センチストークス(cSt)=mm2/sである。動粘度は、動粘度計で測定することができる。また、粘度(mPa・s)を密度(g/cm3)で割って求めることもできる。すなわち、25℃で測定したE型回転粘度計による粘度と密度から求めることができる。動粘度(mm2/s)=粘度(mPa・s)/密度(g/cm3)という式から算出することができる。
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。
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。
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ろ過してもよい。
加熱は、ホットプレート、オーブン等を用いて行うことができる。
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。
積層体に施される加工の一例としては、半導体基板の表面の回路面とは反対の裏面の加工が挙げられ、典型的には、ウエハー裏面の研磨によるウエハーの薄化が挙げられる。このような薄化されたウエハーを用いて、シリコン貫通電極(TSV)等の形成を行い、次いで支持体から薄化ウエハーを剥離してウエハーの積層体を形成し、3次元実装化される。また、それに前後してウエハー裏面電極等の形成も行われる。ウエハーの薄化とTSVプロセスには支持体に接着された状態で250~350℃の熱が負荷されるが、本発明で用いる積層体が含む接着層は、通常、その熱に対する耐熱性を有している。
例えば、直径300mm、厚さ770μm程度のウエハーは、表面の回路面とは反対の裏面を研磨して、厚さ4~80μm程度まで薄化することができる。
積層体の剥離方法は、溶剤剥離、レーザー剥離、鋭部を有する機材による機械的な剥離、支持体とウエハーとの間で引きはがす剥離等が挙げられるが、これらに限定されない。
通常、剥離は、薄化等の加工の後に行われる。
第3工程では、必ずしも接着剤(接着層)が完全に支持基板側に付着して剥離されるものではなく、加工された半導体基板上に一部取り残されることがある。そこで、第4工程において、残留した接着剤が付着した半導体基板の表面を、本発明の洗浄剤組成物で洗浄することにより、基板上の接着剤残留物を十分に除去することができる。
第4工程は、剥離後の半導体基板上に残存する接着剤残留物を、本発明の洗浄剤組成物により除去する工程であり、具体的には、例えば、接着剤が残留する薄化基板を本発明の洗浄剤組成物に浸漬し、必要があれば超音波洗浄等の手段も併用して、接着剤残留物を除去するものである。
超音波洗浄を用いる場合、その条件は、基板の表面の状態を考慮して適宜決定されるものであるが、通常、20kHz~5MHz、10秒~30分の条件で洗浄処理することにより、基板上に残る接着剤残留物を十分取り除くことができる。
(1)撹拌機(自転公転ミキサー):(株)シンキー製 自転公転ミキサー ARE―500
(2)粘度計:東機産業(株)製 回転粘度計TVE-22H
(3)撹拌機:アズワン製 ミックスローターバリアブル 1―1186-12
(4)撹拌機H:アズワン製 加温型ロッキングミキサー HRM-1
(5)接触式膜厚計:(株)東京精密製 ウエハー厚さ測定装置 WT-425
[調製例1]
自転公転ミキサー専用600mL撹拌容器に(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とビニル基含有MQ樹脂からなるベースポリマー(ワッカーケミ社製)150g、(a2)として粘度100mPa・sのSiH基含有直鎖上ポリジメチルシロキサン(ワッカーケミ社製)15.81g及び(A3)として1-エチニル-1-シクロヘキサノール(ワッカーケミ社製)0.17gを入れ、自転公転ミキサーで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)0.33gと(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)9.98gを自転公転ミキサーで5分間撹拌して別途得られた混合物から0.52gを加え、自転公転ミキサーで5分間撹拌し、最終的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。
[実施例1]
テトラブチルアンモニウムフルオリド3水和物(関東化学(株)製)5gに、オクタデセニルこはく酸無水物0.5g及びN,N-ジメチルプロピオンアミド95gを加えて撹拌し、洗浄剤組成物を得た。
テトラブチルアンモニウムフルオリド3水和物(関東化学(株)製)5gに、ドデカン2酸0.5g及びN,N-ジメチルプロピオンアミド95gを加えて撹拌し、洗浄剤組成物を得た。
テトラブチルアンモニウムフルオリド3水和物(関東化学(株)製)5gに、ラウリン酸0.5g及びN,N-ジメチルプロピオンアミド95gを加えて撹拌し、洗浄剤組成物を得た。
テトラブチルアンモニウムフルオリド3水和物(関東化学(株)製)5gに、コハク酸無水物0.5g及びN,N-ジメチルプロピオンアミド95gを加えて撹拌し、洗浄剤組成物を得た。
テトラブチルアンモニウムフルオリド3水和物(関東化学(株)製)5gに、アジピン酸0.5g及びN,N-ジメチルプロピオンアミド95gを加えて撹拌し、洗浄剤組成物を得た。
テトラブチルアンモニウムフルオリド3水和物(関東化学(株)製)5gに、グルタル酸0.5g及びN,N-ジメチルプロピオンアミド95gを加えて撹拌し、洗浄剤組成物を得た。
優れた洗浄剤組成物は、接着剤残留物と接触した直後からそれを溶解させる高い洗浄速度を備える必要があることから、以下の評価を行った。より高い洗浄速度を備えることで、より効果的な洗浄が期待できる。
得られた洗浄剤組成物の洗浄速度を評価するためにエッチングレートの測定を行った。調製例1で得られた接着剤組成物をスピンコーターで12インチシリコンウエハーに塗布し、150℃で15分、次いで190℃で10分加熱し、接着層(厚さ100μm)を形成した。そして、膜(接着層)付きウエハーを4cm角のチップに切り出し、接触式膜厚計を用いて膜厚を測定した。
その後、チップを直径9cmのステンレスシャーレに入れ、得られた洗浄剤組成物7mLを添加して蓋をした後、撹拌機Hに載せて、23℃で5分間撹拌及び洗浄した。洗浄後、チップを取り出し、イソプロパノール及び純水で洗浄し、150℃で1分間乾燥し、再度、接触式膜厚計で膜厚を測定した。そして、洗浄の前後で膜厚減少を算出し、減少した分を洗浄時間で割ることによりエッチングレート[μm/min]を算出し、洗浄力の指標とした。結果は表1に示す。
本発明の洗浄剤組成物を用いることで、バンプボールの腐食を抑制又は回避しながら、半導体基板上の接着剤残留物の好適な除去を期待できる。
Claims (10)
- 接着剤残留物を除去するために用いられる洗浄剤組成物であって、
第四級アンモニウム塩と、金属腐食抑制剤と、有機溶媒とを含み、
上記金属腐食抑制剤が、炭素数7~40の脂肪族飽和炭化水素化合物モノカルボン酸、炭素数7~40の脂肪族飽和炭化水素化合物ジカルボン酸若しくはその酸無水物、炭素数7~40の脂肪族不飽和炭化水素化合物モノカルボン酸又は炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸若しくはその酸無水物からなることを特徴とする洗浄剤組成物。 - 上記金属腐食抑制剤が、炭素数7~40の脂肪族飽和炭化水素化合物モノカルボン酸、炭素数7~40の脂肪族飽和炭化水素化合物ジカルボン酸無水物又は炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸無水物を含む請求項1記載の洗浄剤組成物。
- 上記金属腐食抑制剤が、炭素数7~40の脂肪族飽和炭化水素化合物モノカルボン酸又は炭素数7~40の脂肪族不飽和炭化水素化合物ジカルボン酸無水物を含む請求項2記載の洗浄剤組成物。
- 上記金属腐食抑制剤が、ラウリン酸、ドデカン2酸又はオクタデセニルコハク酸無水物を含む請求項1記載の洗浄剤組成物。
- 上記第四級アンモニウム塩が、含ハロゲン第四級アンモニウム塩である請求項1~4のいずれか1項記載の洗浄剤組成物。
- 上記含ハロゲン第四級アンモニウム塩が、含フッ素第四級アンモニウム塩である請求項5記載の洗浄剤組成物。
- 上記含フッ素第四級アンモニウム塩が、フッ化テトラ(炭化水素)アンモニウムである請求項6記載の洗浄剤組成物。
- 上記フッ化テトラ(炭化水素)アンモニウムが、フッ化テトラメチルアンモニウム、フッ化テトラエチルアンモニウム、フッ化テトラプロピルアンモニウム及びフッ化テトラブチルアンモニウムからなる群から選ばれる少なくとも1種を含む請求項7記載の洗浄剤組成物。
- 上記接着剤残留物が、ヒドロシリル化反応により硬化する成分(A)を含む接着剤組成物から得られた接着層の接着剤残留物である請求項1~8のいずれか1項記載の洗浄剤組成物。
- バンプボールを有する半導体基板と、支持基板と、接着剤組成物から得られる接着層とを備える積層体を製造する第1工程、得られた積層体の半導体基板を加工する第2工程、加工後に半導体基板を剥離する第3工程、及び剥離した半導体基板上に残存する接着剤残留物を洗浄剤組成物により除去する第4工程を含む、加工された半導体基板の製造方法において、上記洗浄剤組成物として請求項1~9のいずれか1項記載の洗浄剤組成物を用いることを特徴とする、加工された半導体基板の製造方法。
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