WO2011027773A1 - レジスト剥離剤組成物及び当該組成物を用いたレジストの剥離方法 - Google Patents
レジスト剥離剤組成物及び当該組成物を用いたレジストの剥離方法 Download PDFInfo
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- WO2011027773A1 WO2011027773A1 PCT/JP2010/064905 JP2010064905W WO2011027773A1 WO 2011027773 A1 WO2011027773 A1 WO 2011027773A1 JP 2010064905 W JP2010064905 W JP 2010064905W WO 2011027773 A1 WO2011027773 A1 WO 2011027773A1
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- SFVFIFLLYFPGHH-UHFFFAOYSA-M stearalkonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 SFVFIFLLYFPGHH-UHFFFAOYSA-M 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 229960001367 tartaric acid Drugs 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000004685 tetrahydrates Chemical class 0.000 description 1
- 229940035024 thioglycerol Drugs 0.000 description 1
- 150000003585 thioureas Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- NCPXQVVMIXIKTN-UHFFFAOYSA-N trisodium;phosphite Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])[O-] NCPXQVVMIXIKTN-UHFFFAOYSA-N 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 229940005605 valeric acid Drugs 0.000 description 1
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
- G03F7/426—Stripping or agents therefor using liquids only containing organic halogen compounds; containing organic sulfonic acids or salts thereof; containing sulfoxides
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
- G03F7/423—Stripping or agents therefor using liquids only containing mineral acids or salts thereof, containing mineral oxidizing substances, e.g. peroxy 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
- 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
Definitions
- the present invention relates to a stripper composition for a photoresist and its residue (hereinafter sometimes simply referred to as a resist) in a photolithography process, and a resist stripping method using the composition. More specifically, a resist remover composition that enables the resist to be removed in a photolithography process in the semiconductor field, and further allows the resist to be removed without adversely affecting the silicon oxide film or the like below the resist. And a resist stripping method characterized by using the composition.
- the photoresist is used in a photolithography process or the like for forming a fine pattern in a semiconductor manufacturing process such as an integrated circuit or a transistor.
- a silicon oxide film is formed with a desired pattern on a silicon substrate
- the substrate is processed, for example, in the following steps. That is, first, a silicon oxide film is formed on the surface of a silicon substrate, a photoresist is applied to the silicon oxide film, and then a resist film is formed. Next, a desired pattern is obtained by exposing and developing using a photomask corresponding to the desired pattern. Further, an unnecessary oxide film is removed from the substrate on which a desired pattern is obtained by an etching process such as plasma doping using the pattern as a mask. Finally, by removing the resist and cleaning the substrate surface, a silicon oxide film on which a desired pattern is formed can be obtained.
- a dry ashing method mainly by ashing such as oxygen plasma ashing (for example, Patent Document 1) and immersion in a stripping solvent containing various additives, etc.
- Oxygen plasma ashing which is an example of a dry ashing method, is a method of decomposing, ashing and removing a resist by the reaction between oxygen gas plasma and the resist, and is said to be a pollution-free method. If the reaction end point is not accurately detected, there is a problem that the substrate surface is easily damaged and particles are likely to adhere and remain on the substrate surface. In addition, there is a problem that, in general, expensive equipment for generating plasma is necessary.
- the resist is converted into an inorganic material (ashed) and removed by the strong oxidizing power of peroxomonosulfuric acid (caroic acid) obtained by the reaction of hot concentrated sulfuric acid and hydrogen peroxide.
- carboic acid peroxomonosulfuric acid
- Patent Document 2 There are known methods (for example, Patent Document 2).
- this method requires the use of high-temperature concentrated sulfuric acid, which is not only dangerous, but also a hot mixed acid having a strong oxidizing power generates an unnecessary oxide on the metal surface, For example, since the metal is melted, it cannot be applied to a substrate having metal wiring such as aluminum wiring.
- the present invention has been made in view of the situation as described above, and can easily and easily remove the resist in the photolithography process in the semiconductor field. Furthermore, the present invention can be applied to a silicon oxide film, plasma doping under the resist. Resist stripper composition for semiconductor substrate that enables resist stripping without adversely affecting the implantation layer, the metal wiring applied to the substrate, and the like, and stripping of the resist characterized by using the composition It is to provide a method.
- the present invention comprises [I] a carbon radical generator, [II] acid, [III] reducing agent, and [IV] an organic solvent, and has a pH of less than 7.
- the invention of the composition comprises [I] a carbon radical generator, [II] acid, [III] reducing agent, and [IV] an organic solvent, and has a pH of less than 7.
- the present invention also provides a resist for a semiconductor substrate comprising [I] a carbon radical generator, [II] acid, [III] reducing agent, and [IV] an organic solvent, and having a pH of less than 7. It is an invention of a resist stripping method characterized by using a stripping composition.
- the resist remover composition of the present invention makes it possible to easily and easily remove a resist in a photolithography process in the semiconductor field, and includes [I] a carbon radical generator, [II] acid, [III] By using a combination of reducing agent and [IV] organic solvent, it is possible to remove the resist without adversely affecting the silicon oxide film and implant layer underneath the resist and the metal wiring applied to the substrate. To do.
- the resist stripping method of the present invention is an effective method for stripping the resist simply and easily.
- a stripping agent having the above composition as described above, In this method, the resist can be easily removed without adversely affecting a certain silicon oxide film or the like.
- the present inventors have conducted extensive research to achieve the above object, and as a result, at least [I] a carbon radical generator, [II] acid, [III] reducing agent, and [IV] a composition containing an organic solvent.
- the resist can be stripped, and in addition, by using the composition containing the above-described components, the resist can be stripped without using a method using a large or expensive apparatus such as plasma ashing.
- the resist can be removed gently and easily as compared with the conventional dipping method using caloic acid, and the composition may be a composition that does not contain a component that dissolves the metal. Therefore, the present invention was found for the first time to be applicable to a substrate provided with metal wiring such as aluminum wiring, and the present invention was completed.
- the carbon radical generator in the resist stripper composition of the present invention is less susceptible to adverse effects such as forming an oxide film on the surface of the metal wiring, compared to a compound that generates oxygen radicals such as hydrogen peroxide and ozone. It has also been found by the present inventors that the resist can be stripped without adversely affecting metal wiring such as aluminum wiring.
- the resist stripper composition of the present invention does not need to contain a compound that generates fluorine ions (fluoride ions) such as hydrogen fluoride or a salt thereof, and has no corrosive action due to hydrogen fluoride,
- fluorine ions fluoride ions
- a semiconductor that not only has advantages such as easy handling and easy disposal of waste liquid, but also may be corroded by, for example, hydrogen fluoride such as a silicon substrate on which an oxide film (silicon oxide film) is formed. It has also been found by the present inventors that it is particularly useful as a resist stripper on a substrate.
- Examples of the [I] carbon radical generator in the resist remover composition for a semiconductor substrate of the present invention include compounds that suitably generate carbon radicals by heating or light irradiation.
- 2,2′- Azobis (4-methoxy-2,4-dimethylvaleronitrile), 2,2'-azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (2-methylpropionitrile), 2,2 ' -Azonitrile-based carbon radical generators such as 1-azobis (2-methylbutyronitrile), 1,1'-azobis (cyclohexane-1-carbonitrile), 1-[(1-cyano-1-methylethyl) azo] formamide
- 2,2′-azobis ⁇ 2-
- benzyl ketal carbon radical generators such as 2,2-dimethoxy-1,2-diphenylethane-1-one, etc.
- Carbon radical generators such as 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1, 1,2-aminoalkylphenone-based carbon radical generators such as 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) phenyl] -1-butanone 200-75 wavelength
- a compound that suitably generates a carbon radical when irradiated with light of 0 nm is preferable.
- carbon radical generators some of the compounds that generate carbon radicals suitably by heating can generate carbon radicals even by light irradiation.
- Azonitrile-based carbon radical generators, azoamides Carbon-based radical generators, chain azoamidine-based carbon radical generators, cyclic azoamidine-based carbon radical generators, azoester-based carbon radical generators, etc. are equivalent to those capable of generating carbon radicals even with light.
- Carbon radicals can also be generated by light irradiation at 750 nm.
- a compound that suitably generates a carbon radical by heating can generate a carbon radical only by normal heating, but the above-mentioned azonitrile-based carbon radical generator, azoamide-based carbon radical generator, chain azoamidine-based compound
- azonitrile-based carbon radical generator azoamide-based carbon radical generator
- chain azoamidine-based compound For compounds that generate carbon radicals even when irradiated with light, such as carbon radical generators, cyclic azoamidine-based carbon radical generators, azoester-based carbon radical generators, etc.
- Carbon radicals may be generated by a method using a combination of light irradiation and light irradiation.
- a compound that suitably generates a carbon radical by light irradiation means one that can easily generate a carbon radical by light irradiation, and does not mean one that does not generate a carbon radical by heating. That is, the above-mentioned compound that suitably generates a carbon radical when irradiated with light is capable of generating a carbon radical even when heated.
- a compound that suitably generates a carbon radical by light irradiation can generate a carbon radical only by light irradiation.
- the carbon radical can also be generated by heating alone or by combining heating and light irradiation. Can occur.
- the carbon radical generators of these preferred specific examples are useful from the viewpoints of industrial availability, economical efficiency, and ability to efficiently strip the resist in a short time.
- the [II] acid in the resist remover composition for a semiconductor substrate of the present invention is not particularly limited as long as it has an action of acidifying the pH of the solution.
- hydrochloric acid, nitric acid, sulfuric acid, Inorganic acids such as phosphoric acid for example, aliphatic monocarboxylic acids such as formic acid, acetic acid, trifluoroacetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, etc.
- Aliphatic dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, maleic acid and fumaric acid
- aliphatic hydroxycarboxylic acids such as lactic acid, malic acid, tartaric acid and citric acid
- Aliphatic tricarboxylic acids such as acids, aliphatic oxocarboxylic acids such as pyruvic acid, aromatic monocarboxylic acids such as benzoic acid, Le acid, isophthalic acid, aromatic dicarboxylic acids such as terephthalic acid, such as salicylic acid, aromatic hydroxycarboxylic acids, such as gallic acid, e.g., such as an organic acid such as aromatic hexacarboxylic acids, such as mellitic acid.
- the [II] acid may be in the form of a salt as long as it shows acidity.
- Specific examples of the salt include ammonium salts such as alkali metal salts such as sodium salts and potassium salts. Is mentioned.
- these acids may be used alone or in combination of a plurality of kinds as appropriate.
- a carboxylic acid having one or more hydroxyl groups in the structure is classified as a hydroxycarboxylic acid regardless of the number of carboxyl groups.
- organic acids are preferable, among them the property of showing moderate acidity in a solution even when used in a small amount, and from the viewpoint of industrial availability, economy, etc.
- Acetic acid, trifluoroacetic acid, oxalic acid and citric acid are more preferred.
- Inorganic acids are usually provided in an aqueous solution, and when such inorganic acids are used on a substrate with metal wiring, the action of a large amount of water and acid contained in the inorganic acid is the cause. Therefore, it is desirable not to use an inorganic acid when the resist is peeled from such a substrate.
- an alkali metal salt of an inorganic acid or an organic acid is used for a substrate provided with metal wiring, it may cause deterioration of electrical characteristics on the semiconductor substrate.
- peeling off it is desirable not to use an alkali metal salt of an inorganic acid or an organic acid.
- the reducing agent in the resist remover composition for a semiconductor substrate of the present invention is not particularly limited as long as it is a compound having a reducing action, and includes a reducing agent usually used in this field.
- a reducing agent usually used in this field.
- hydrazine or a derivative thereof for example, hydroxylamine or a derivative thereof, for example, a sulfite such as sodium sulfite or ammonium sulfite, for example, a thiosulfite such as sodium thiosulfite or ammonium thiosulfite, for example, an aldehyde such as formaldehyde or acetaldehyde
- Carboxylic acids having reducibility such as formic acid, oxalic acid, succinic acid, lactic acid, malic acid, citric acid, pyruvic acid, ascorbic acid derivatives such as ascorbic acid or ascorbic acid ester, isoascorbic acid or isoascor
- these reducing agents may be used alone or in combination of a plurality of types as appropriate.
- carboxylic acids having reducing properties such as formic acid, oxalic acid, succinic acid, lactic acid, malic acid, citric acid, and pyruvic acid also exhibit the action as an acid described above.
- These reducing carboxylic acids can be used alone as the two components of the reducing agent.
- hydrazine derivative examples include compounds such as hydrazine sulfate and hydrazine monohydrochloride.
- hydroxylamine derivative include, for example, the general formula [1].
- R 1 is a linear, branched or cyclic alkyl group having 1 to 6 carbon atoms or a linear or branched substituted alkyl group having 1 to 3 carbon atoms and having a hydroxyl group having 1 to 3 carbon atoms.
- R 2 represents a hydrogen atom, a linear, branched or cyclic alkyl group having 1 to 6 carbon atoms, or a linear or branched group having 1 to 4 carbon atoms having 1 to 3 hydroxyl groups.
- linear, branched or cyclic alkyl group having 1 to 6 carbon atoms represented by R 1 and R 2 in the general formula [1] include, for example, a methyl group, an ethyl group, and an n-propyl group.
- linear or branched substituted alkyl group having 1 to 3 carbon atoms and having 1 to 3 hydroxyl groups represented by R 1 and R 2 in the general formula [1] include, for example, 1-hydroxy Ethyl group, 2-hydroxyethyl group, 1,2-dihydroxyethyl group, 2,2-dihydroxyethyl group, 1-hydroxy-n-propyl group, 2-hydroxy-n-propyl group, 3-hydroxy-n-propyl group Group, 1,2-dihydroxy-n-propyl group, 1,3-dihydroxy-n-propyl group, 2,2-dihydroxy-n-propyl group, 2,3-dihydroxy-n-propyl group, 3,3- Dihydroxy-n-propyl group, 1,2,3-trihydroxy-n-propyl group, 2,2,3-trihydroxy-n-propyl group, 2,3,3-trihydroxy-n-propyl group, 1 -Hydroxyisopropyl group, 2-hydro Siisopropyl group,
- hydroxylamine derivative include compounds usually used in this field, and specifically include, for example, mono- or dimethylhydroxylamine, mono- or diethylhydroxylamine, mono- or di-n-propylhydroxylamine, mono- Or diisopropylhydroxylamine, mono or di-n-butylhydroxylamine, mono or diisobutylhydroxylamine, mono or di-sec-butylhydroxylamine, mono or di-tert-butylhydroxylamine, mono or dicyclobutylhydroxylamine, mono Or di-n-pentylhydroxylamine, mono- or diisopentylhydroxylamine, mono- or di-sec-pentylhydroxylamine, mono- or di-tert-pentylhydroxylamine, mono- or dineopentylhydroxylamine Min, mono or di-2-methylbutylhydroxylamine, mono or bis (1,2-dimethylpropyl) hydroxylamine, mono or di-1-ethylpropylhydroxylamine, mono
- hydroxylamine derivatives represented by the above general formula [1] commercially available ones are used, for example, an epoxide such as glycidol is dropped into an aqueous solution of hydroxylamine or monoalkyl-substituted hydroxylamine, and then reacted at an appropriate temperature. It is sufficient to use what was suitably synthesize
- the ascorbic acid ester examples include compounds such as ascorbyl stearate, ascorbyl palmitate, ascorbyl dipalmitate, ascorbyl tetrahexyldecanoate, and ascorbic acid glucoside.
- the isoascorbic acid ester examples include compounds such as isoascorbyl stearate, isoascorbyl palmitate, isoascorbyl dipalmitate, isoascorbyl tetrahexyldecanoate, and isoascorbic acid glucoside.
- ascorbic acid esters and isoascorbic acid esters for example, sodium ascorbate, sodium ascorbate sulfate, sodium ascorbate phosphate, magnesium ascorbate phosphate, sodium isoascorbate, sodium isoascorbate sulfate, sodium isoascorbate phosphate
- an ascorbic acid ester or isoascorbic acid ester containing an alkali metal or alkaline earth metal such as magnesium isoascorbate
- the alkali metal or alkaline earth metal is Since the electrical characteristics on the wiring may be deteriorated, when stripping the resist on such a substrate, ascorbic acid ester or isoascorbic acid ester containing alkali metal or the like is used. It is desirable not to use Le.
- reducing agents from the viewpoint of moderate reduction performance, industrial availability, economy, etc., for example, hydroxylamine or a derivative thereof such as ascorbic acid or ascorbic acid ester, isoascorbic acid or isoascorbine Ascorbic acid derivatives such as acid esters are preferred, among which hydroxylamine derivatives, ascorbic acid, and ascorbic acid esters are more preferred.
- diethylhydroxylamine, bis (2,2-dihydroxyethyl) hydroxylamine, bis (2,3-dihydroxy) -n-propyl) -1-hydroxylamine, ascorbic acid, ascorbyl palmitate are more preferred.
- Examples of the [IV] organic solvent in the resist remover composition for a semiconductor substrate of the present invention include organic solvents usually used in this field. Specifically, for example, methanol, ethanol, n-propanol, isopropanol, n- Alcohol-based protic polar organic solvents such as butanol, tert-butanol, 1-methoxy-2-propanol, ethylene glycol, such as ethyl acetate, n-propyl acetate, isobutyl acetate, ethyl lactate, diethyl oxalate, diethyl tartrate, ⁇
- Examples include ester solvents such as -butyrolactone, amide solvents such as dimethylformamide and N-methylpyrrolidone, sulfoxide solvents such as dimethyl sulfoxide, and aprotic polar organic solvents such as nitrile solvents such as acetonitrile.
- organic solvents isopropanol, ethylene glycol, ⁇ -butyrolactone, and N-methylpyrrolidone that can strip the resist in a short time are preferable, and among them, isopropanol, ⁇ -butyrolactone, and N-methylpyrrolidone are preferable. More preferred.
- these organic solvents may be used alone or in appropriate combination of a plurality of types, and as an organic solvent in the resist remover composition for a semiconductor substrate of the present invention, A combination of isopropanol and ⁇ -butyrolactone or a combination of isopropanol and N-methylpyrrolidone is particularly preferable.
- the action of the organic solvent according to the present invention is an action of dissolving the resist and the cured resist film in the organic solvent and dissolving and removing the resist and the cured resist film.
- the resist remover composition for a semiconductor substrate of the present invention may contain [V] water.
- water By containing water, solubilization of a reducing agent which is difficult to dissolve in an organic solvent is assisted, and the resist can be more easily stripped by smoothly exhibiting the reducing action of the reducing agent. .
- the water [V] is not particularly limited as long as it does not adversely affect the resist stripping.
- Examples thereof include normal water, purified water such as distilled water and deionized water, and ultrapure water. Pure water is preferred. Since ultrapure water contains almost no impurities, it can be suitably used for a substrate provided with metal wiring such as aluminum wiring.
- the resist remover composition for a semiconductor substrate of the present invention may contain [VI] a surfactant in addition to the components described above.
- a surfactant By including a surfactant, it is possible to assist the solubilization of a reducing agent that is difficult to dissolve in an organic solvent, and the resist can be more easily peeled off by smoothly exhibiting the reducing action of the reducing agent. It becomes.
- the surfactant [VI] may be any surfactant that is usually used in this field. Specifically, for example, a cationic surfactant, an anionic surfactant, a nonionic surfactant, an amphoteric interface. Examples include activators. Specific examples of the cationic surfactant include primary to tertiary alkylamine salts such as monostearyl ammonium chloride, distearyl ammonium chloride, tristearyl ammonium chloride, such as monostearyl trimethyl ammonium chloride, distearyl dimethyl.
- Quaternary alkylammonium salts such as ammonium chloride, stearyldimethylbenzylammonium chloride, monostearylbis (polyethoxy) methylammonium chloride, such as N-cetylpyridinium chloride, alkylpyridinium salts such as N-stearylpyridinium chloride, such as cetylethylmorpholine Nitroethosulphate, 4- (4,6-Dimethoxy-1,3,5-triazin-2-yl) -4-methylmorpholinium Examples thereof include N, N-dialkylmorpholinium salts such as muchloride, and fatty acid amide salts such as polyethylene polyamine.
- anionic surfactant examples include sodium alkylcarboxylate, potassium alkylcarboxylate, ammonium alkylcarboxylate, sodium alkylbenzenecarboxylate, potassium alkylbenzenecarboxylate, and ammonium alkylbenzenecarboxylate.
- Anionic surfactants having a carboxyl group for example, alkylsulfonic acid sodium salt, alkylsulfonic acid potassium salt, alkylsulfonic acid ammonium salt, alkylbenzenesulfonic acid sodium salt, alkylbenzenesulfonic acid potassium salt, alkylbenzenesulfonic acid ammonium salt, alkylnaphthalene Sulfonic acid sodium salt, alkyl naphthalene sulf
- nonionic surfactants include polyoxyethylene alkyl ethers such as polyoxyethylene stearyl ether, polyoxyethylene alkenyl ethers such as polyoxyethylene oleyl ether, such as polyoxyethylene nonyl, and the like.
- Polyoxyalkylene alkyl phenyl ethers such as phenyl ether, polyoxyalkylene glycols such as polyoxypropylene polyoxyethylene glycol, polyoxyethylene monoalkylates such as polyoxyethylene monostearate, such as bispolyoxyethylene Bispolyoxyethylene alkylamines such as stearylamine, eg bispolyoxyethylenealkylamides such as bispolyoxyethylenestearylamide, examples In N, such as alkyl amine oxides such as N- dimethyl alkylamine oxides.
- amphoteric surfactants include carboxybetaines such as alkyl-N, N-dimethylaminoacetic acid betaine and alkyl-N, N-dihydroxyethylaminoacetic acid betaine such as alkyl-N, N.
- carboxybetaines such as alkyl-N, N-dimethylaminoacetic acid betaine and alkyl-N, N-dihydroxyethylaminoacetic acid betaine such as alkyl-N, N.
- -Sulfobetaines such as dimethylsulfoethyleneammonium betaine, for example, imidazolinium betaines such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine.
- these surfactants may be used alone or in combination of a plurality of types as appropriate.
- the resist remover composition for a semiconductor substrate of the present invention can remove the resist only when [II] acid is contained and the pH is made acidic to less than 7. Further, the pH in the range of 0 to 4 is preferable among the pHs in the acidic region, and the pH in the range of 0 to 2 is more preferable. By setting the pH within such a preferable range, the resist can be peeled off more effectively in a shorter time. In addition, what is necessary is just to set the adjustment of pH so that it may become in said range by adjusting suitably the kind, density
- the resist remover composition for a semiconductor substrate of the present invention contains [I] a carbon radical generator, [II] acid, [III] reducing agent, and [IV] an organic solvent. [V] It may contain water. Further, the resist remover composition for a semiconductor substrate of the present invention is in a state of an organic solvent solution or a mixed solution of an organic solvent and water, and the carbon radical generator, acid and reducing agent according to the present invention as described above, It is prepared by dissolving in an organic solvent or a mixed solvent of an organic solvent and water.
- the concentration by weight of each component in the composition further containing water that is, [I] carbon radical generator, [II] acid , [III] Reducing agent, [IV] Organic solvent, and [V]
- water that is, [I] carbon radical generator, [II] acid , [III] Reducing agent, [IV] Organic solvent, and [V]
- the weight% concentration of water will be described below.
- the weight% concentration of the carbon radical generator [I] in the resist remover composition for semiconductor substrates of the present invention is usually 0.1 to 10% by weight, preferably as the weight of the carbon radical generator relative to the total weight of the composition. Is 0.5 to 10% by weight.
- concentration of the carbon radical generator used is too low, there is a problem that the carbon radicals inevitably required for removing the resist are reduced and the resist cannot be sufficiently removed.
- the concentration by weight of [II] acid in the resist remover composition for a semiconductor substrate of the present invention is usually 0.1 to 5% by weight, preferably 0.5 to 5% by weight of the acid relative to the total weight of the composition. % By weight. If the use concentration of the acid is too low, the pH of the composition becomes too high, and there is a problem that it is difficult to effectively remove the resist in a short time.
- the concentration by weight of the [III] reducing agent in the resist remover composition for a semiconductor substrate of the present invention is usually 0.01 to 10% by weight, preferably 0.1% as the weight of the reducing agent relative to the total weight of the composition. ⁇ 5% by weight. If the concentration of the reducing agent used is too low, there is a problem that the resist cannot be sufficiently removed.
- the weight percent concentration of [IV] organic solvent in the resist remover composition for a semiconductor substrate of the present invention is usually 60 to 99 wt%, preferably 70 to 99 wt% as the weight of the organic solvent relative to the total weight of the composition. It is. If the use concentration of the organic solvent is too low, there are problems that the resist cannot be sufficiently peeled off, and the peeled resist residue is reattached to the substrate.
- the weight% concentration of [V] water in the resist remover composition for a semiconductor substrate of the present invention is usually 0.01 to 30% by weight, preferably 0.01 to 20% as the weight of the water relative to the total weight of the composition. % By weight. If the concentration of water used is too high, there is a problem in that corrosion of metal wiring such as aluminum wiring applied to the substrate is caused. For this reason, when the board
- the resist remover composition for a semiconductor substrate of the present invention includes the above-described [I] carbon radical generator, [II] acid, [III] reducing agent, [IV] organic solvent, [V] water according to the present invention as described above.
- [VI] surfactant various auxiliary components may be contained within a range not impeding the effects of the present invention.
- auxiliary components include, for example, a metal corrosion inhibitor used for the purpose of protecting the metal wiring and preventing corrosion when a substrate provided with the metal wiring is targeted.
- the metal corrosion inhibitor examples include benzotriazoles such as benzotriazole derivatives such as carboxybenzotriazole and aminobenzotriazole, thioureas such as thiourea, and thiol compounds such as mercaptothiazole, mercaptoethanol, and thioglycerol.
- benzotriazoles such as benzotriazole derivatives such as carboxybenzotriazole and aminobenzotriazole
- thioureas such as thiourea
- thiol compounds such as mercaptothiazole, mercaptoethanol, and thioglycerol.
- carboxylic acid derivatives such as quinolinecarboxylic acid.
- these metal corrosion inhibitors may be used alone or in combination of a plurality of types as appropriate.
- the use concentration of the auxiliary component appropriately added to the resist remover composition for a semiconductor substrate of the present invention may be a concentration range usually used in this field, and specifically, for example, wt% of a metal corrosion inhibitor.
- concentration is usually 0.01 to 5% by weight as the weight of the metal corrosion inhibitor relative to the total weight of the composition.
- the method for preparing the resist remover composition for a semiconductor substrate of the present invention may be any method that can finally prepare a solution containing the components according to the present invention as described above.
- (2) [I] carbon radical generator according to the present invention, [II] acid and [III] reducing agent, and if necessary, [VI] surfactant separately from [IV] organic A method of mixing an organic solvent solution dissolved in a solvent, (3) [IV] a mixed solvent of an organic solvent and [V] water, [I] a carbon radical generator, [II] acid and [ (III) A method of directly adding a reducing agent, and if necessary, (VI) a surfactant, stirring and dissolving, (4) (I) a solution of a carbon radical generator according to the present invention (IV) in an organic solvent solution And [II] acid and [
- the method (4) is a preferable preparation method from the viewpoint that pH adjustment is easy because an aqueous solution containing an acid is added last.
- the resist remover composition for a semiconductor substrate of the present invention contains a carbon radical generator, the light having a wavelength in a specific region required for the carbon radical generator such as a yellow lamp to generate carbon radicals is used. It is desirable to prepare under a cut light, in a dark place, or at a low temperature such as room temperature or lower.
- the resist to be peeled is a so-called photoresist film formed from a resist material containing an organic polymer compound, and is for g-line or i-line.
- a resist material containing an organic polymer compound Any of excimer lasers such as KrF and ArF, electron beams, and X-rays may be used, and there is no particular limitation.
- it includes a film that has been altered by heat, for example, a film whose surface is hardened by plasma doping such as boron or phosphorus.
- the resist remover composition for a semiconductor substrate of the present invention is an excellent remover capable of removing not only a resist but also a resist cured film generated by plasma doping.
- the target semiconductor substrate include, for example, a silicon substrate, a GaAs substrate, a GaP substrate, etc.
- a silicon substrate is preferable, and the silicon substrate is A silicon substrate in which an oxide film (silicon oxide film) is formed on the surface of the substrate is preferable.
- the oxide film referred to here is a thermal oxide film, a TEOS oxide film, or the like.
- the target semiconductor substrate is not limited as long as at least a resist is formed on the semiconductor substrate such as a silicon substrate, and an oxide film is formed among them.
- a silicon substrate in which a resist is formed on the oxide film is preferable, and a silicon substrate on which the oxide film is formed is more preferably a plasma-doped substrate.
- the target semiconductor substrate may be provided with metal wiring, but among them, a semiconductor substrate provided with metal wiring is preferable, and among them, a silicon substrate provided with metal wiring is more preferable, and among them, metal A silicon substrate on which an oxide film (silicon oxide film) with wiring is formed is particularly preferable.
- the metal wiring include aluminum wiring, tungsten wiring, copper wiring, aluminum alloy wiring, tungsten alloy wiring, aluminum copper alloy wiring, and the like.
- the resist remover composition for a semiconductor substrate according to the present invention may have a composition containing only a small amount of water or no water at all, and may cause adverse effects such as oxidizing the wiring surface of the metal wiring.
- the resist remover composition for a semiconductor substrate of the present invention is suitably used for a silicon substrate having an oxide film formed on the surface thereof, and therefore, for example, hydrogen fluoride or It is desirable that the fluorine source that dissolves the silicon oxide film such as a salt thereof, that is, a compound that generates fluorine ions (fluoride ions) is substantially not contained.
- the resist remover composition for a semiconductor substrate of the present invention does not substantially contain such a compound that generates highly corrosive fluorine ions (fluoride ions), the composition can be easily handled. In addition, it is possible to expect the effect that the waste liquid treatment becomes easy.
- the term “substantially” as used herein refers to an amount that may adversely affect the silicon oxide film, such as dissolving the silicon oxide film, and also excludes trace amounts of impurities such as impurities. Not what you want.
- a solution of a composition prepared by preparing the components according to the present invention as described above within a predetermined concentration range by the method described above is prepared.
- a method of immersing the semiconductor substrate as described above while irradiating the solution with light of a predetermined wavelength (active energy rays), and immersing the semiconductor substrate as described above while heating the solution to a predetermined temperature is achieved by appropriately adopting a method, a method of immersing a semiconductor substrate as described above using the method, the light irradiation and the heating together.
- the preferred wavelength of light (active energy ray) when irradiating with predetermined light (active energy ray) is usually a wavelength of 200 to 750 nm, preferably a wavelength of 200 to 450 nm.
- a preferable temperature during heating is usually 30 to 90 ° C, preferably 40 to 80 ° C.
- Resist stripping composition for semiconductor substrate of the present invention irradiated with light (active energy ray) of the wavelength as described above [composition only for light irradiation], resist for semiconductor substrate of the present invention heated to a predetermined temperature as described above Stripper composition [composition only for heating], or resist stripper composition for semiconductor substrate of the present invention heated to a predetermined temperature as described above while irradiating light (active energy rays) having a wavelength as described above [
- the preferable immersion time is 1 to 60 minutes, more preferably 1 to 50 minutes, and further preferably 1 minute to 40 minutes.
- the method using only light irradiation is easier to control the generation of carbon radicals of the carbon radical generator than the method using only heating or the method using heating together, and hardly adversely affects the semiconductor substrate.
- This is a preferred method in which advantages such as cost performance are advantageous.
- it is desirable to employ a method in which the resist stripper composition for a semiconductor substrate of the present invention is irradiated with light (active energy rays) having a preferable wavelength as described above but not heated.
- light active energy rays
- the dipping method for example, a method of simply allowing a semiconductor substrate to stand in the resist remover composition for a semiconductor substrate of the present invention during the dipping, for example, a resist remover composition for a semiconductor substrate of the present invention.
- a method of immersing the composition for example, a method of immersing the composition while shaking the composition, such as a method of immersing the resist remover composition for a semiconductor substrate of the present invention while bubbling with an inert gas such as nitrogen gas
- a known immersion method such as a method of immersing a semiconductor substrate while swinging the semiconductor substrate, such as a method of immersing the semiconductor substrate while moving it using a moving means such as a conveyor, etc. can be mentioned. Good.
- the resist stripping method as described above is merely an example, and other methods may be employed.
- a method of immersing a semiconductor substrate in the resist remover composition for a semiconductor substrate of the present invention that has been irradiated with light before immersion without performing light irradiation during the immersion may be adopted.
- a method of dipping a semiconductor substrate in the resist remover composition for a semiconductor substrate of the present invention set in advance to a predetermined temperature before dipping without applying heat during dipping May be adopted.
- the resist peeling method by dipping has been described, but the resist remover composition for a semiconductor substrate of the present invention, which is appropriately heated or / and irradiated with light, may be applied to a semiconductor substrate, not the dipping method, You may make it employ
- a device required for light irradiation heating, dipping, stirring, bubbling, coating, spraying, etc., a device usually used in this field is sufficient.
- the resist stripping method of the present invention is an excellent method capable of stripping the resist under mild conditions such as light irradiation and heating without adopting the conventional plasma ashing.
- the resist remover composition for a semiconductor substrate of the present invention can be a composition that does not contain a compound that generates fluorine ions (fluoride ions), which is a component that dissolves silicon oxide films and metals. Therefore, it is an excellent method that can be applied to a silicon substrate on which a silicon oxide film is formed and a semiconductor substrate on which metal wiring is applied.
- a resist cured film is obtained by curing the surface of a resist film by plasma doping with boron on a substrate having a resist film having a thickness of 200 nm formed on the substrate having an oxide film formed on the surface of a silicon wafer having a diameter of 300 mm.
- the substrate was attached. Subsequently, the said board
- Example 1 Preparation of Resist Stripper Composition (1) for Semiconductor Substrate of the Present Invention
- a yellow lamp (straight tube yellow fluorescent lamp, FLR40SY-IC / M; manufactured by Mitsubishi Electric OSRAM Co., Ltd.)
- 1 g of dimethyl-2,2′-azobis (2-methylpropionate) (V-601; manufactured by Wako Pure Chemical Industries, Ltd.) was added and stirred at room temperature. After confirming the dissolution of V-601, while continuing stirring, the total amount of an aqueous solution in which 0.5 g of ascorbic acid and 3 g of citric acid were previously dissolved in 15.5 g of water was added to the solution.
- a product (1) was prepared.
- Examples 2 to 10 Preparation of Resist Stripper Compositions (2) to (10) for Semiconductor Substrate of the Present Invention
- the components shown in Table 1 were used and the amounts shown in Table 1 were charged. Except for the above, the compositions (2) to (10) of the present invention were prepared in the same manner as in Example 1. These compositions are shown in Table 1 together with the composition of Example 1.
- the numerical value shown in Table 1 is the weight% concentration of each component when the total weight of the composition is 100%.
- Comparative Example 1 Preparation of Comparative Composition (1) After adding 0.5 g of ascorbic acid to a mixed solvent of 80 g of ⁇ -butyrolactone and 16.5 g of water, 3 g of citric acid was added, and a comparative composition having a pH of 2 ( 1) was prepared.
- Comparative Examples 2 to 5 Preparation of Comparative Compositions (2) to (5) Comparative Example 2 was the same as Comparative Example 1 except that the components shown in Table 2 were used and the amounts shown in Table 2 were charged. Thus, a comparative composition (2) was prepared. Further, in Comparative Examples 3 to 5, a comparison was made in the same manner as in Example 1 except that various bases shown in Table 2 were used instead of the acid according to the composition of the present invention and the amounts shown in Table 2 were charged. Compositions (3) to (5) for use were prepared. These compositions are shown in Table 2 together with the composition of Comparative Example 1. In addition, the numerical value shown in Table 2 is the weight% concentration of each component when the total weight of the composition is 100%.
- Example 11 Evaluation of Resist Stripper Composition (1) for Semiconductor Substrate of the Present Invention 100 mL of the composition (1) of the present invention prepared in Example 1 was heated to 60 ° C. and maintained at 60 ° C. as described above. The substrate for use was immersed for 30 minutes under gentle stirring. Thereafter, the substrate was rinsed with pure water for 30 seconds, and the substrate surface was dried with compressed air. When the substrate sample after drying was visually observed, it was confirmed that the resist was peeled off satisfactorily. As a result, it was found that not only the resist film but also the cured resist film can be removed by immersing the evaluation substrate in the heated composition of the present invention for 30 minutes with stirring.
- compositions (2) to (9) of the present invention were the same as in Example 11.
- immersion was performed for a predetermined time, and the resist peeling performance was visually observed.
- Example 20 Evaluation of Resist Stripper Composition (10) for Semiconductor Substrate of the Present Invention 100 mL of the composition (10) of the present invention prepared in Example 10 was added to an ultraviolet irradiation device (UV irradiation device, MUV-35U) at room temperature. Using the MUV-PF001 filter attached; manufactured by Moritex Co., Ltd., the substrate for evaluation was immersed for 20 minutes under gentle stirring while irradiating light (active energy ray) having a central wavelength of 320 nm. Thereafter, the substrate was rinsed with pure water for 30 seconds, and the substrate surface was dried with compressed air. When the substrate sample after drying was visually observed, it was confirmed that the resist was peeled off satisfactorily. As a result, it was found that not only the resist film but also the cured resist film can be peeled off by immersing the evaluation substrate in the composition of the present invention for 20 minutes with light irradiation.
- UV irradiation device MUV-35U
- Comparative Examples 6 to 10 Evaluation of Comparative Compositions (1) to (5)
- the comparative compositions (1) to (5) were immersed for 30 minutes in the same manner as in Example 11. went. However, in any of the comparative compositions, the resist was hardly peeled off. These results are shown in Table 4.
- the resist with a cured film can be satisfactorily peeled in any composition containing a compound (thermal radical generator) in which the carbon radical generator suitably generates carbon radicals upon heating.
- a compound (thermal radical generator) in which the carbon radical generator suitably generates carbon radicals upon heating.
- a compound (photo radical generator) that suitably generates carbon radicals by light is used instead of a thermal radical generator, and carbon radicals are generated by light irradiation. It was also found that the resist with a cured film can be peeled off well when it is used.
- the composition according to the present invention is a carbon radical generator, the carbon radical generator, It has been found that the combination of acid, reducing agent, and organic solvent is important. In addition, it was found that a composition in which a base was used instead of an acid and the pH was adjusted to be basic needed to make the pH of the solution acidic because the resist could not be removed.
- Example 21 Aluminum Elution Evaluation of Aluminum Plate Using Resist Stripper Composition (8) for Semiconductor Substrate of the Present Invention
- An aluminum plate having a thickness of 0.3 mm and 20 mm ⁇ 10 mm was immersed for 20 minutes. After immersion, the aluminum plate was taken out of the immersion liquid, and the aluminum contained in the immersion liquid was quantified by flameless atomic absorption spectrometry (AA-280Z, Fourness atomic absorption spectrophotometer; manufactured by Varian). Only 0.2 ppm was detected. From this, it was found that only 0.2 ppm of aluminum was eluted in the immersion liquid.
- AA-280Z flameless atomic absorption spectrometry
- Example 22 Evaluation of tungsten elution of a tungsten plate using the resist remover composition (8) for semiconductor substrates of the present invention
- Example 22 was carried out except that the metal plate to be evaluated was changed from an aluminum plate to a tungsten plate. In the same manner as in Example 21, the elution amount of tungsten was confirmed. As a result, only 0.5 ppm was detected, indicating that only 0.5 ppm of tungsten was eluted in the immersion liquid.
- Comparative Examples 11 to 12 Metal elution evaluation of metal plates using peroxomonosulfuric acid (caroic acid)
- 98% sulfuric acid was mixed at a weight ratio of 10 and 35% hydrogen peroxide water at a ratio of 1.
- Example 11 except that 5 mL of peroxomonosulfuric acid (caroic acid) prepared and heated to 130 ° C. was used, in Comparative Example 11, the metal plate to be evaluated was an aluminum plate, and Comparative Example 12 was a tungsten plate. In the same manner as in No. 21, the elution amounts of aluminum and tungsten were confirmed.
- the resist remover composition for semiconductor substrates of the present invention hardly dissolves metal plates such as aluminum plates and tungsten plates. It has been found that even if the resist remover composition for a semiconductor substrate of the present invention is used for a substrate on which wiring is applied, it is difficult to exert adverse effects such as dissolution of the metal wiring.
- peroxomonosulfuric acid which is a conventionally known resist stripper, has a high tendency to dissolve a metal plate such as an aluminum plate or a tungsten plate, so that it is applied to a semiconductor substrate provided with a metal wiring such as aluminum or tungsten. When applied, it is suggested that disconnection of metal wiring may occur.
- the resist remover composition for a semiconductor substrate according to the present invention makes it possible to easily and efficiently remove a resist in a photolithography process in the semiconductor field. Furthermore, the resist remover composition of a resist cured film generated at the time of plasma doping can be used. Peeling is also possible. In addition, since it does not adversely affect the metal wiring applied to the semiconductor substrate, the resist remover composition for semiconductor substrate of the present invention can be expected to be suitably used for a semiconductor substrate provided with metal wiring. .
- the resist remover composition for semiconductor substrates of this invention is Particularly suitable for a silicon substrate on which an oxide film (silicon oxide film) is formed, which not only facilitates handling of the composition, facilitates waste liquid treatment, but may be corroded by hydrogen fluoride or the like. It is expected that it can be used.
- the resist stripping method of the present invention is a method that can easily and efficiently strip the resist under relatively mild conditions, a large and expensive apparatus such as ashing that has been conventionally performed can be used.
- the resist can be stripped without performing stripping under conditions that may adversely affect the metal wiring, such as required processing, melting of the metal wiring using a hot mixed acid such as caloic acid, and surface oxidation.
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- General Physics & Mathematics (AREA)
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Abstract
Description
(式中、R1は炭素数1~6の直鎖状、分枝状若しくは環状のアルキル基又は1~3のヒドロキシル基を有する炭素数1~4の直鎖状若しくは分枝状の置換アルキル基を表し、R2は水素原子、炭素数1~6の直鎖状、分枝状若しくは環状のアルキル基又は1~3のヒドロキシル基を有する炭素数1~4の直鎖状若しくは分枝状の置換アルキル基を表す。)で示されるヒドロキシルアミン誘導体等が挙げられる。
γ-ブチロラクトン80gの有機溶剤溶液に、イエローランプ(直管イエロー蛍光ランプ,FLR40SY-IC/M;三菱電機オスラム株式会社製)の照射下、ジメチル-2,2’-アゾビス(2-メチルプロピオネート)(V-601;和光純薬工業株式会社製)1gを加え、室温で攪拌した。V-601の溶解を確認した後、攪拌を続けながら、その溶液に予めアスコルビン酸0.5g及びクエン酸3gを水15.5gに溶解させた水溶液の全量を加えて、pH2の本発明の組成物(1)を調製した。
実施例2~10では、表1に示す各成分を用いて、表1に示す量を仕込んだ以外は、実施例1と同様にして、本発明の組成物(2)~(10)を調製した。これらの組成を実施例1の組成と併せて表1に示す。なお、表1に示す数値は、組成物の総重量を100%とした場合における各成分の重量%濃度である。
γ-ブチロラクトン80g及び水16.5gの混合溶媒に、アスコルビン酸0.5gを加えた後、クエン酸3gを加えて、pH2の比較用組成物(1)を調製した。
比較例2では、表2に示す各成分を用いて、表2に示す量を仕込んだ以外は、比較例1と同様にして、比較用組成物(2)を調製した。また、比較例3~5では、本発明の組成物に係る酸の代わりに表2に示す各種塩基を用いて、表2に示す量を仕込んだ以外は、実施例1と同様にして、比較用組成物(3)~(5)を調製した。これらの組成を比較例1の組成と併せて表2に示す。なお、表2に示す数値は、組成物の総重量を100%とした場合における各成分の重量%濃度である。
実施例1で調製した本発明の組成物(1)100mLを60℃に加熱し、そのまま60℃に保ちながら、上記評価用基板を、ゆるやかな攪拌下、30分間浸漬した。その後、純水で30秒間リンスし、基板表面を圧縮空気で乾燥した。乾燥後の基板サンプルを目視で観察したところ、レジストが良好に剥離できていることが確認できた。その結果、評価用基板を、加熱した本発明の組成物中に攪拌下30分間浸漬すれば、レジスト膜のみならず、レジスト硬化膜をも剥離できることが判った。
実施例12~19では、本発明の組成物(2)~(9)について実施例11と同様の方法により、所定の時間浸漬を行って、レジストの剥離性能を目視で観察した。これらの結果を実施例11の結果と併せて表3に示す。
実施例10で調製した本発明の組成物(10)100mLに、室温中、紫外線照射装置(UV照射装置,MUV-35U MUV-PF001フィルター付き;株式会社モリテックス製)を用い、中心波長320nmの光(活性エネルギー線)を照射しながら、ゆるやかな攪拌下、上記評価用基板を20分間浸漬した。その後、純水で30秒間リンスし、基板表面を圧縮空気で乾燥した。乾燥後の基板サンプルを目視で観察したところ、レジストが良好に剥離できていることが確認できた。その結果、評価用基板を、光照射しながら本発明の組成物中に攪拌下20分間浸漬すれば、レジスト膜のみならず、レジスト硬化膜をも剥離できることが判った。
比較例6~10では、比較用組成物(1)~(5)について実施例11と同様の方法により、30分間浸漬を行った。しかしながら、何れの比較用組成物においても、レジストがほとんど剥離できなかった。これらの結果を表4に示す。
60℃に加熱した、実施例8で調製した本発明の組成物(8)5mL中に、厚さ0.3mm、20mm×10mmのアルミニウム板を20分間浸漬した。浸漬後、アルミニウム板を浸漬液から取り出し、浸漬液中に含まれるアルミニウムをフレームレス原子吸光法(AA-280Z,フォーネス原子吸光分光光度計;バリアン社製)により定量したところ、0.2ppmしか検出されなかったことから、浸漬液には、アルミニウムが0.2ppmしか溶出していないことが判った。
実施例22では、評価対象となる金属板をアルミニウム板からタングステン板に代えた以外は、実施例21と同様の方法により、タングステンの溶出量を確認した。その結果、0.5ppmしか検出されなかったことから、浸漬液には、タングステンが0.5ppmしか溶出していないことが判った。
比較例11~12では、重量比にして98%硫酸を10、35%過酸化水素水を1の割合で混合して調製し、130℃に加熱したペルオキソ一硫酸(カロ酸)5mLを用い、比較例11では、評価対象となる金属板をアルミニウム板とし、比較例12ではタングステン板とした以外は、実施例21と同様の方法により、アルミニウム及びタングステンの溶出量を確認した。その結果、比較例11では3ppmのアルミニウムが検出され、比較例12では1ppmのタングステンが検出された。この結果から、浸漬液には、3ppmのアルミニウムが溶出し、1ppmのタングステンが溶出していることが判った。なお、実施例21~22及び比較例11~12の結果を表5に示す。
Claims (16)
- 〔I〕炭素ラジカル発生剤、〔II〕酸、〔III〕還元剤、並びに〔IV〕有機溶剤を含有し、pHが7未満であることを特徴とする半導体基板用レジスト剥離剤組成物。
- 更に〔V〕水を含有することを特徴とする請求項1に記載の組成物。
- 更に〔VI〕界面活性剤を含有することを特徴とする請求項2に記載の組成物。
- 前記〔I〕炭素ラジカル発生剤が、波長200~750nmの光照射によって炭素ラジカルを発生する化合物である請求項1に記載の組成物。
- 前記〔II〕酸が、有機酸である請求項1に記載の組成物。
- 前記〔II〕酸が、酢酸、トリフルオロ酢酸、シュウ酸及びクエン酸からなる群より選ばれる少なくとも1種のものであるである請求項1に記載の組成物。
- 前記〔III〕還元剤が、ヒドロキシルアミン誘導体、アスコルビン酸及びアスコルビン酸エステルからなる群より選ばれる少なくとも1種のものである請求項1に記載の組成物。
- pHが、0~4の範囲である請求項1に記載の組成物。
- 前記半導体基板が、酸化膜が形成されたシリコン基板である請求項1に記載の組成物。
- 前記半導体基板が、酸化膜が形成されたシリコン基板であって、レジストが当該酸化膜の上部に形成されたものである請求項1に記載の組成物。
- 前記酸化膜が形成されたシリコン基板が、プラズマドーピングされたものである請求項9に記載の組成物。
- 前記酸化膜が形成されたシリコン基板が、金属配線が施されたものである請求項9に記載の組成物。
- 前記金属配線が、アルミニウム配線、タングステン配線又は銅配線である請求項12に記載の組成物。
- 前記〔I〕炭素ラジカル発生剤の重量%が0.1~10重量%、前記〔II〕酸の重量%が0.1~5重量%、前記〔III〕還元剤の重量%が0.01~10重量%、前記〔IV〕有機溶剤の重量%が60~99重量%、並びに前記〔V〕水の重量%が0.01~30重量%である請求項2に記載の組成物。
- 実質的にフッ素イオンを発生する化合物を含まないものである請求項1に記載の組成物。
- 請求項1に記載の組成物を用いることを特徴とするレジストの剥離方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2011529912A JP5598477B2 (ja) | 2009-09-02 | 2010-09-01 | レジスト剥離剤組成物及び当該組成物を用いたレジストの剥離方法 |
SG2012014908A SG178608A1 (en) | 2009-09-02 | 2010-09-01 | Resist remover composition and method for removing resist using the composition |
CN201080038222.2A CN102483591B (zh) | 2009-09-02 | 2010-09-01 | 抗蚀剂剥离剂组合物和使用该组合物的抗蚀剂的剥离方法 |
US13/394,005 US9006164B2 (en) | 2009-09-02 | 2010-09-01 | Resist remover composition and method for removing resist using the composition |
EP10813722.5A EP2474862B1 (en) | 2009-09-02 | 2010-09-01 | Composition for removing a resist on a semiconductor substrate and method for removing resist using the composition |
IL218407A IL218407A0 (en) | 2009-09-02 | 2012-02-29 | Resist remover composition and method for removing resist using the composition |
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EP (1) | EP2474862B1 (ja) |
JP (1) | JP5598477B2 (ja) |
KR (1) | KR20120073256A (ja) |
CN (1) | CN102483591B (ja) |
IL (1) | IL218407A0 (ja) |
SG (2) | SG10201405263XA (ja) |
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Cited By (6)
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CN102880017A (zh) * | 2012-09-28 | 2013-01-16 | 京东方科技集团股份有限公司 | 光刻胶用剥离液组合物及其制备和应用 |
JP2018511079A (ja) * | 2015-03-12 | 2018-04-19 | アーゼッド・エレクトロニック・マテリアルズ(ルクセンブルグ)ソシエテ・ア・レスポンサビリテ・リミテ | 低pka駆動ポリマーストリップ中の電荷錯体銅保護を促進する組成物および方法 |
JP2018109153A (ja) * | 2016-12-29 | 2018-07-12 | 東京応化工業株式会社 | 洗浄液、防食剤、及びこれらを製造する方法 |
US11385548B2 (en) | 2019-01-25 | 2022-07-12 | Tokyo Ohka Kogyo Co., Ltd. | Process liquid and method of processing substrate |
WO2023145826A1 (ja) * | 2022-01-31 | 2023-08-03 | 花王株式会社 | 樹脂マスクの剥離方法 |
US11994803B2 (en) | 2019-07-11 | 2024-05-28 | Merck Patent Gmbh | Photoresist remover compositions |
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WO2014178424A1 (ja) * | 2013-05-02 | 2014-11-06 | 富士フイルム株式会社 | エッチング方法、これに用いるエッチング液およびエッチング液のキット、ならびに半導体基板製品の製造方法 |
CN103336412B (zh) * | 2013-07-03 | 2017-02-08 | 北京科华微电子材料有限公司 | 一种新型的光刻胶剥离液及其应用工艺 |
US9957469B2 (en) | 2014-07-14 | 2018-05-01 | Versum Materials Us, Llc | Copper corrosion inhibition system |
JP2016122769A (ja) * | 2014-12-25 | 2016-07-07 | 東京エレクトロン株式会社 | ドーピング方法および半導体素子の製造方法 |
CN105843001B (zh) * | 2016-03-28 | 2020-03-24 | 武汉新芯集成电路制造有限公司 | 一种用于含碳多孔材料基底的光刻涂层的去除方法 |
TWI851333B (zh) * | 2023-07-10 | 2024-08-01 | 關東鑫林科技股份有限公司 | 去阻層組成物及使用其之去阻層方法 |
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- 2010-09-01 SG SG2012014908A patent/SG178608A1/en unknown
- 2010-09-01 US US13/394,005 patent/US9006164B2/en not_active Expired - Fee Related
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CN102880017A (zh) * | 2012-09-28 | 2013-01-16 | 京东方科技集团股份有限公司 | 光刻胶用剥离液组合物及其制备和应用 |
JP2018511079A (ja) * | 2015-03-12 | 2018-04-19 | アーゼッド・エレクトロニック・マテリアルズ(ルクセンブルグ)ソシエテ・ア・レスポンサビリテ・リミテ | 低pka駆動ポリマーストリップ中の電荷錯体銅保護を促進する組成物および方法 |
JP7045190B2 (ja) | 2015-03-12 | 2022-03-31 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | 低pka駆動ポリマーストリップ中の電荷錯体銅保護を促進する組成物および方法 |
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US11385548B2 (en) | 2019-01-25 | 2022-07-12 | Tokyo Ohka Kogyo Co., Ltd. | Process liquid and method of processing substrate |
US11994803B2 (en) | 2019-07-11 | 2024-05-28 | Merck Patent Gmbh | Photoresist remover compositions |
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Also Published As
Publication number | Publication date |
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US9006164B2 (en) | 2015-04-14 |
SG178608A1 (en) | 2012-03-29 |
CN102483591B (zh) | 2014-09-17 |
JPWO2011027773A1 (ja) | 2013-02-04 |
EP2474862A1 (en) | 2012-07-11 |
SG10201405263XA (en) | 2014-11-27 |
TWI514093B (zh) | 2015-12-21 |
JP5598477B2 (ja) | 2014-10-01 |
EP2474862A4 (en) | 2013-05-22 |
KR20120073256A (ko) | 2012-07-04 |
TW201126286A (en) | 2011-08-01 |
CN102483591A (zh) | 2012-05-30 |
EP2474862B1 (en) | 2015-02-25 |
US20120172274A1 (en) | 2012-07-05 |
IL218407A0 (en) | 2012-04-30 |
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