WO2009110582A1 - 半導体表面用処理剤組成物及びそれを用いた半導体表面の処理方法 - Google Patents
半導体表面用処理剤組成物及びそれを用いた半導体表面の処理方法 Download PDFInfo
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- WO2009110582A1 WO2009110582A1 PCT/JP2009/054248 JP2009054248W WO2009110582A1 WO 2009110582 A1 WO2009110582 A1 WO 2009110582A1 JP 2009054248 W JP2009054248 W JP 2009054248W WO 2009110582 A1 WO2009110582 A1 WO 2009110582A1
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- GRJJQCWNZGRKAU-UHFFFAOYSA-N pyridin-1-ium;fluoride Chemical compound F.C1=CC=NC=C1 GRJJQCWNZGRKAU-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- WGZXOMPLJAOTAY-UHFFFAOYSA-N pyrrolidin-1-ium;fluoride Chemical compound F.C1CCNC1 WGZXOMPLJAOTAY-UHFFFAOYSA-N 0.000 description 1
- LOAUVZALPPNFOQ-UHFFFAOYSA-N quinaldic acid Chemical compound C1=CC=CC2=NC(C(=O)O)=CC=C21 LOAUVZALPPNFOQ-UHFFFAOYSA-N 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- WQQPDTLGLVLNOH-UHFFFAOYSA-M sodium;4-hydroxy-4-oxo-3-sulfobutanoate Chemical compound [Na+].OC(=O)CC(C([O-])=O)S(O)(=O)=O WQQPDTLGLVLNOH-UHFFFAOYSA-M 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- SFVFIFLLYFPGHH-UHFFFAOYSA-M stearalkonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 SFVFIFLLYFPGHH-UHFFFAOYSA-M 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- QSUJAUYJBJRLKV-UHFFFAOYSA-M tetraethylazanium;fluoride Chemical compound [F-].CC[N+](CC)(CC)CC QSUJAUYJBJRLKV-UHFFFAOYSA-M 0.000 description 1
- 150000004685 tetrahydrates Chemical class 0.000 description 1
- POSYVRHKTFDJTR-UHFFFAOYSA-M tetrapropylazanium;fluoride Chemical compound [F-].CCC[N+](CCC)(CCC)CCC POSYVRHKTFDJTR-UHFFFAOYSA-M 0.000 description 1
- 229940035024 thioglycerol Drugs 0.000 description 1
- 150000003585 thioureas Chemical class 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- PIFYSWIJWKZPAT-UHFFFAOYSA-N tricyclohexylazanium;fluoride Chemical compound [F-].C1CCCCC1[NH+](C1CCCCC1)C1CCCCC1 PIFYSWIJWKZPAT-UHFFFAOYSA-N 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- GRSOSRPRKCYTMG-UHFFFAOYSA-N tripropylazanium;fluoride Chemical compound [F-].CCC[NH+](CCC)CCC GRSOSRPRKCYTMG-UHFFFAOYSA-N 0.000 description 1
- 229940005605 valeric acid Drugs 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- G03F7/425—Stripping or agents therefor using liquids only containing mineral alkaline compounds; containing organic basic compounds, e.g. quaternary ammonium compounds; containing heterocyclic basic compounds containing nitrogen
-
- 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
-
- 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
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
- H01L21/0274—Photolithographic processes
- H01L21/0276—Photolithographic processes using an anti-reflective coating
-
- 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
-
- 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 semiconductor surface treating agent composition and a semiconductor surface treating method using the same.
- the present invention relates to a semiconductor surface treating agent composition and a semiconductor surface treating method using the composition.
- semiconductor elements such as IC and LSI suppress light scattering during exposure on conductive metal films, insulating layers, and low dielectric layers formed on a substrate such as a silicon wafer by vapor deposition.
- An antireflection film layer and a resist layer are applied, and then selectively exposed and developed to form a resist pattern, and then a conductive metal film, an insulating layer, and a low dielectric layer using the resist pattern as a mask
- By selectively etching the antireflection film layer a fine circuit is formed, and further, the resist layer and the antireflection film layer are peeled off by ashing or the like by ashing or the like, and then in an ashing process or the like.
- the remaining resist layer residue or antireflection film layer residue is produced by treating with a cleaning (peeling) solution or the like.
- the problem to be solved by the present invention is that the antireflection film layer in the manufacturing process of a semiconductor element or the like can be easily peeled off at a low temperature and in a short time, and the antireflection film layer and the resist applied thereon are coated. It is possible to peel both layers of a layer, and furthermore, it is possible to peel a resist-cured layer generated during an etching process, and a semiconductor surface treating agent composition and the semiconductor composition characterized by using the composition. It is to provide a processing method.
- the present invention is an invention of a semiconductor surface treating agent composition
- a semiconductor surface treating agent composition comprising a compound that generates fluorine ions in water, a carbon radical generator, and water.
- the present invention is an invention of a semiconductor surface treatment method characterized by using a semiconductor surface treatment composition containing a compound that generates fluorine ions in water, a carbon radical generator, and water.
- the semiconductor surface treating agent composition of the present invention makes it possible to peel off the antireflection film layer in the production process of a semiconductor element and the like easily and in a short time, and is a compound that generates fluorine ions in water and carbon.
- a radical generator By using in combination with a radical generator, the antireflection film layer can be effectively peeled off, and by using a carbon radical generator as a radical generation source, for example, copper wiring on the surface of the semiconductor substrate or antireflection film layer
- the antireflection film layer can be peeled off without adversely affecting the underlying insulating film such as a low-k film.
- the semiconductor surface treatment method of the present invention is an effective method for peeling off the antireflection film layer in a simple and short time.
- a carbon radical generator is used as a radical generation source.
- the antireflection film layer can be easily peeled without adversely affecting an insulating film such as a copper wiring on the surface of the semiconductor substrate or a low-k film under the antireflection film layer.
- Specific examples of the compound that generates fluorine ions in water in the semiconductor surface treating agent composition of the present invention include hydrofluoric acid such as ammonium fluoride and hydroxylamine fluoride salt, and an inorganic non-metallic base. Salts such as hydrofluoric acid and organic bases such as primary to tertiary alkylamines, primary to tertiary alkanolamines, alicyclic amines, and heterocyclic amines, and quaternary ammonium fluorides. Compound salts, hydrofluoric acid and the like.
- the primary to tertiary alkylamine for example, carbon such as methylamine, ethylamine, propylamine, butylamine, dimethylamine, diethylamine, dipropylamine, dibutylamine, trimethylamine, triethylamine, tripropylamine, tributylamine, etc.
- Examples of the compound that generates fluorine ions in water which are salts of hydrofluoric acid and these alkylamines, include monomethyl ammonium fluoride, monoethyl ammonium fluoride, mono Propyl ammonium fluoride, monobutyl ammonium fluoride, dimethyl ammonium fluoride, diethyl ammonium fluoride, dipropyl ammonium fluoride, dibutyl ammonium fluoride, trimethyl Ammonium fluoride, triethylammonium fluoride, tripropylammonium fluoride, tributylammonium fluoride, and the like.
- Examples of the primary to tertiary alkanolamines include monoethanolamine, diethanolamine, triethanolamine and the like, and generate fluorine ions in water, which is a salt of hydrofluoric acid and these alkanolamines.
- Examples of the compound include monoethanol ammonium fluoride, diethanol ammonium fluoride, triethanol ammonium fluoride and the like.
- examples of the alicyclic amine include cyclohexylamine, dicyclohexylamine, tricyclohexylamine and the like, and are salts of hydrofluoric acid and these alicyclic amines, and compounds that generate fluorine ions in water.
- Examples thereof include monocyclohexylammonium fluoride, dicyclohexylammonium fluoride, and tricyclohexylammonium fluoride.
- Examples of the heterocyclic amine include pyrrolidine, piperidine, morpholine, pyrrole, pyridine, and the like.
- Examples thereof include pyrrolidinium fluoride, piperidinium fluoride, morpholinium fluoride, pyrrolinium fluoride, pyridinium fluoride, and the like.
- examples of the quaternary ammonium fluoride salt include tetramethylammonium fluoride, tetraethylammonium fluoride, tetrapropylammonium fluoride, and tetrabutylammonium fluoride.
- a salt of hydrofluoric acid and an inorganic non-metallic base or hydrofluoric acid from the viewpoint of industrial availability, economy, solubility in water, and the like
- a salt of hydrofluoric acid and an inorganic non-metallic base is more preferable, and among them, from the viewpoint of easy handling, the antireflection film layer can be efficiently peeled off in a short time, and the like. More preferred is ammonium fluoride.
- a salt containing an alkali metal such as lithium fluoride, potassium fluoride, or sodium fluoride, that is, a salt of hydrofluoric acid and an inorganic metal base.
- produce a fluorine ion in water may be used individually by 1 type, and may be used in combination of multiple types suitably.
- the antireflection film layer can be peeled off.
- Examples of the carbon radical generator of the present invention include compounds that generate a carbon radical by heating or light irradiation, and specifically, for example, 2,2′-azobis (4-methoxy-2,4-dimethylvaleronitrile). 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis (2-methylpropionitrile), 2,2′-azobis (2-methylbutyronitrile), 1,1 Azonitrile-based carbon radical generators such as' -azobis (cyclohexane-1-carbonitrile), 1-[(1-cyano-1-methylethyl) azo] formamide, such as 2,2'-azobis ⁇ 2-methyl-N -[1,1-bis (hydroxymethyl) -2-hydroxyethyl] propionamide ⁇ , 2,2′-azobis ⁇ 2-methyl-N- [2- (1-hydroxybutyl)] propionamide ⁇ , 2, 2'- Azobis [2-methyl-N- (2-hydroxyethyl) propionamide], 2,2′
- carbon radical generators for example, 2,2′-azobis (4-methoxy-2,4-dimethylvaleronitrile), 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2 ′ -Azobis (2-methylpropionitrile), 2,2'-azobis (2-methylbutyronitrile), 1,1'-azobis (cyclohexane-1-carbonitrile), 1-[(1-cyano-1 Azonitrile-based carbon radical generators such as 2-methylethyl) azo] formamide, such as 2,2′-azobis ⁇ 2-methyl-N- [1,1-bis (hydroxymethyl) -2-hydroxyethyl] propionamide ⁇ , 2,2′-azobis ⁇ 2-methyl-N- [2- (1-hydroxybutyl)] propionamide ⁇ , 2,2′-azobis [2-methyl-N- (2-hydroxyethyl) propionamide], 2,2'- Zobis [N- (2-propenyl) -2-methylpropionamide], 2,2
- Azoamide-based carbon radical generators such as 2,2′-azobis (2-methylpropionamidine) dihydrochloride, 2,2′-azobis [N- (2-carboxyethyl) -2-methylpropionamidine] teto
- a compound that suitably generates a carbon radical by heating such as a chain azoamidine-based carbon radical generator such as lahydrate, an azoester-based carbon radical generator such as dimethyl-2,2′-azobis (2-methylpropionate),
- benzyl ketal type carbon radical generators such as 2,2-dimethoxy-1,2-diphenylethane-1-one, such as 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1- [4- (2-hydroxyethoxy) phenyl] -2-hydroxy-2-methyl-1-propan-1-one, 2-hydroxy-1- [4- [4- (2-hydroxy-2-methylpropionyl) benzyl] phenyl ] 1,2-hydroxyalkylphenone-based carbon radical generator
- some of the compounds that suitably generate carbon radicals upon heating include those that can generate carbon radicals even when irradiated with light.
- Azonitrile-based carbon radical generators, azoamide-based carbon radicals A generator, a chain azoamidine-based carbon radical generator, a cyclic azoamidine-based carbon radical generator, an azoester-based carbon radical generator, and the like correspond to those capable of generating a carbon radical by light, and have a wavelength of 200 to 750 nm.
- a carbon radical can be suitably generated by irradiation.
- produces a carbon radical suitably by light irradiation means the thing which can generate
- the carbon radical generators of these preferred specific examples are useful from the viewpoints of industrial availability, economical efficiency, and ability to efficiently peel off the antireflection film layer in a short time.
- the present inventors were provided for manufacturing a semiconductor such as an antireflection film layer by a simple method such as immersion without using ashing or the like by using a composition containing these components. It was the first time that the surface layer could be peeled off.
- the inventors have found a composition that can peel off the resist cured layer formed on the surface at the same time as the antireflection film layer.
- carbon radical generators combined with compounds that generate fluorine ions in water can peel off treatment layers such as antireflection coatings better than compounds that generate oxygen radicals such as hydrogen peroxide and ozone. It is an excellent compound that can peel off the above-mentioned layer without adversely affecting the metal wiring such as a low-k film and copper wiring under the treatment layer.
- the water in the semiconductor surface treating agent composition of the present invention is not particularly limited as long as it does not affect the low-k film and the metal wiring, for example, purified water, distilled water, ultrapure water, etc. Among these, ultrapure water is preferable.
- the semiconductor surface treating agent composition of the present invention preferably contains an acid in addition to the components described above.
- an acid By adjusting the pH of the aqueous solution by containing an acid, not only can the adverse effect on the insulating film such as the low-k film under the antireflection film layer be reduced, but also “fluorine ions in water” in the composition. It is possible to facilitate the production of hydrofluoric acid in water of the “compound that generates” and to peel off the antireflection film layer in a shorter time.
- examples of the acid include acids that have an action of acidifying pH and can assist a compound that generates fluorine ions in water to generate hydrofluoric acid in water.
- inorganic acids such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, such as formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, etc.
- Aliphatic monocarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, maleic acid, fumaric acid and other aliphatic dicarboxylic acids such as lactic acid, malic acid, tartaric acid and citric acid
- 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.
- hydrofluoric acid itself is an acid, it corresponds to the above-mentioned compound that generates fluorine ions in water and generates hydrofluoric acid in water, but it does not assist in its generation.
- Hydroacid is classified into the above-mentioned compounds that generate fluorine ions in water.
- inorganic acids aliphatic dicarboxylic acids, aliphatic hydroxycarboxylic acids, aliphatic tricarboxylic acids, aromatic dicarboxylic acids, aromatic hydroxycarboxylic acids, aromatic hexacarboxylic acids are Among these, aliphatic dicarboxylic acids, aliphatic hydroxycarboxylic acids, aromatic dicarboxylic acids, and aromatic hydroxycarboxylic acids are more preferable from the viewpoint of ease of handling, industrial availability, economy, and the like.
- Oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, maleic acid, fumaric acid, malic acid, tartaric acid, citric acid, phthalic acid, more preferably oxalic acid, malic acid, tartaric acid, Citric acid is particularly preferred.
- an inorganic acid such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid or the like is contained in the composition of the present invention.
- the coexistence may cause deterioration of electrical characteristics on the semiconductor substrate. In such a case, the use of an inorganic acid is not preferable.
- these acids may be used alone or in combination of a plurality of kinds as appropriate.
- the semiconductor surface treating agent composition of the present invention contains an organic solvent in addition to the above-described constituent components.
- an organic solvent in addition to the antireflection film layer, the resist layer and the resist hardened layer that occurs during the etching process, which is more difficult to remove than the resist layer, can be effectively removed.
- examples of the organic solvent include organic solvents that can peel the resist layer without affecting the peeling of the antireflection film layer.
- Specific examples include methanol, ethanol, isopropyl alcohol, and 1-methoxy.
- Alcohol solvents such as 2-propanol and ethylene glycol, eg ester solvents such as ethyl acetate, propyl acetate, isobutyl acetate, ethyl lactate, diethyl oxalate, diethyl tartrate, ⁇ -butyrolactone, amides such as N-methylpyrrolidone
- An organic solvent such as an alcohol solvent, an ester solvent, an amide solvent, or a sulfoxide solvent, such as a sulfoxide solvent such as dimethyl sulfoxide, having a dipole moment of 1.5 to 7.5 debye and a specific gravity of 0 And organic solvents in the range of 7 to 1.2.
- isopropyl alcohol which enables peeling of the resist layer in a short time, makes peeling of the resist cured layer generated during the etching process, which is difficult to remove than the resist layer
- Ethylene glycol, ⁇ -butyrolactone, and N-methylpyrrolidone are more preferable, and among them, isopropyl alcohol, ⁇ -butyrolactone, and N-methylpyrrolidone are more preferable.
- these organic solvents may be used alone or in combination of a plurality of types as appropriate, as the organic solvent in the semiconductor surface treating agent composition of the present invention, A combination of isopropyl alcohol and ⁇ -butyrolactone or a combination of isopropyl alcohol and N-methylpyrrolidone is more preferable.
- the dipole moment or specific gravity of the organic solvent described above does not mean the dipole moment or specific gravity of the organic solvent obtained by mixing them. This means that the dipole moment of each combined organic solvent is 1.5 to 7.5 debye, and the specific gravity of each organic solvent itself is in the range of 0.7 to 1.2.
- the semiconductor surface treating agent composition of the present invention further contains a reducing agent in addition to the components described above.
- a reducing agent By further containing a reducing agent, the resist cured layer can be peeled off in a shorter time due to the reducing action.
- examples of the reducing agent include reducing agents usually used in this field.
- reducing agents usually used in this field Specifically, for example, hydrazine or derivatives thereof, for example, sulfites such as sodium sulfite and ammonium sulfite, such as sodium thiosulfite, thiosulfite, and the like.
- Thiosulfites such as ammonium sulfate, aldehydes such as formaldehyde and acetaldehyde, carboxylic acids having reducibility such as formic acid, oxalic acid, succinic acid, lactic acid, malic acid, citric acid and pyruvic acid, such as ascorbic acid or ascorbic acid ester
- Ascorbic acid derivatives such as isoascorbic acid or isoascorbic acid ester, such as pentoses having reducing properties such as arabinose, xylose, ribose, etc., such as hexoses having reducing properties such as glucose, mannose, fructose, galactose, etc. Sugar and the like.
- 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.
- carboxylic acids can be used alone as the two components of the reducing agent.
- examples of the hydrazine derivative include compounds such as hydrazine sulfate and hydrazine monohydrochloride
- examples of the ascorbic acid ester include ascorbyl stearate, ascorbyl palmitate, ascorbyl dipalmitate, and ascorbyl tetrahexyldecanoate.
- examples of the isoascorbic acid ester include compounds such as isoascorbyl stearate, isoascorbyl palmitate, isoascorbyl dipalmitate, isoascorbyl tetrahexyldecanoate, and isoascorbic acid glucoside. Is mentioned.
- ascorbic acid esters and isoascorbic acid esters for example, ascorbic acid esters containing alkali metals or alkaline earth metals such as sodium ascorbate, sodium ascorbate sulfate, sodium ascorbate phosphate, magnesium ascorbate phosphate, etc.
- alkali metals and alkaline earth metals may cause deterioration of electrical characteristics on the semiconductor substrate, and therefore it is not preferable to use ascorbic acid esters containing the alkali metals and the like.
- ascorbic acid derivatives such as ascorbic acid or ascorbic acid ester, isoascorbic acid or isoascorbic acid ester are available from the viewpoints of moderate reduction performance, industrial availability, economy and the like. Among them, ascorbic acid or ascorbic acid ester is more preferable, and among them, ascorbyl palmitate is more preferable. Moreover, these reducing agents may be used alone or in combination of a plurality of types as appropriate.
- the semiconductor surface treating agent composition of the present invention may contain a surfactant in addition to the components described above.
- a surfactant By containing the surfactant, it is effective to assist the solubilization of the compound or reducing agent that generates fluorine ions in water, and to further enhance the effect of the compound or reducing agent that generates fluorine ions in water.
- examples of the surfactant include a cationic surfactant, an anionic surfactant, a nonionic surfactant, and an amphoteric surfactant that are generally used in this field.
- 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, for example, alkylpyridinium salts such as N-cetylpyridinium chloride and N-stearylpyridinium chloride, N, N-dialkyl Examples include morpholinium salts, for example, 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, and polyoxyethylene alkylene ethers such as polyoxyethylene oleyl ether, such as polyoxyethylene nonyl.
- 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 If 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.
- alkylcarboxylic acid sodium salt alkylcarboxylic acid Potassium salt
- alkylcarboxylic acid ammonium salt alkylbenzenecarboxylic acid sodium salt
- alkylbenzenecarboxylic acid potassium salt alkylbenzenecarboxylic acid ammonium salt
- polyoxyalkylene alkyl ether carboxylic acid sodium salt polyoxyalkylene alkyl ether carboxylic acid potassium salt
- polyoxyalkylene Alkyl ether carboxylic acid ammonium salt N-acyl sarcosine acid sodium salt, N-acyl sarcosine acid potassium salt, N-acyl sarcosine acid ammonium salt
- N-acyl glutamic acid sodium salt Anionic surfactants having a carboxyl group in the
- Anionic surfactants having an acid group such as alkylphosphonic acid sodium salt, alkylphosphonic acid potassium salt, alkylphosphonic acid ammonium salt, alkylbenzenephosphonic acid sodium salt, alkylbenzenephosphonic acid potassium salt, alkylbenzenephosphonic acid ammonium salt, polyoxy Alkylene alkyl ether phosphonic acid sodium salt, polyoxyalkylene alkyl ether phosphonic acid potassium salt, polyoxyalkylene alkyl ether phosphonic acid ammonium
- Anionic surfactants such as anionic surfactants having a phosphonic acid group in the molecule such as a nium salt, polyoxyethylene alkyl ethers such as polyoxyethylene stearyl ether, and polyoxyethylene alkyl ethers such as polyoxyethylene oleyl ether Oxyethylene alkylene ethers, for example, polyoxyalkylene alkyl phenyl ethers such as polyoxyethylene nonylphenyl ether, polyoxyalky
- Ethylene monoalkylates for example bispolyoxyethylene alkylamines such as bispolyoxyethylene stearylamine, for example bispolyoxyethylene stearylamide
- Nonionic surfactants such as polyoxyethylene alkylamides, for example, alkylamine oxides such as N, N-dimethylalkylamine oxide are preferred, and among them, for example, alkylsulfonic acid sodium salt, alkylsulfonic acid potassium salt, alkylsulfone Acid ammonium salt, alkylbenzenesulfonic acid sodium salt, alkylbenzenesulfonic acid potassium salt, alkylbenzenesulfonic acid ammonium salt, alkylnaphthalenesulfonic acid sodium salt, alkylnaphthalenesulfonic acid potassium salt, alkylnaphthalenesulfonic acid ammonium salt, polyoxyalkylene alkyl ether sulfonic acid Sodium salt, potassium polyoxyalkylene al
- the concentration of each component in the composition when the treatment target is only peeling of the antireflection film layer will be described. That is, in the case where only the antireflection film layer is peeled off, it is only necessary that the composition contains three components of a fluorine ion generating compound in water, a carbon radical generator, and water.
- the concentration required for peeling off the antireflection film layer of these constituents when the total amount is 100% by weight is usually 0.01 to 5% by weight as the concentration of the compound that generates fluorine ions in water,
- the concentration is preferably 0.01 to 1% by weight
- the concentration of the carbon radical generator is usually 0.05 to 10% by weight, preferably 0.1 to 2% by weight
- the concentration of water is usually 85 to 99%. 0.94% by weight, preferably 97 to 99.89% by weight.
- the acid concentration is usually 0.05 to 5 % By weight, preferably 0.05 to 3% by weight.
- the antireflection film layer can be peeled favorably, and in particular, by setting each concentration within the above preferable range, it is possible to shorten the time. With this, the antireflection film layer can be peeled off.
- the semiconductor surface treating agent composition of the present invention not only the antireflection film layer but also the components in the composition when the resist layer and the cured resist layer are peeled off at the same time as the antireflection film layer.
- the concentration will be described.
- the composition contains the above-mentioned organic solvent, and if necessary, further contains a reducing agent, a surfactant or the like. It is desirable. Below, the density
- the concentration of the compound that generates fluorine ions in water in the semiconductor surface treating agent composition of the present invention is usually 0.01 to 5% by weight, preferably as the concentration of the compound that generates fluorine ions relative to the total amount of the composition. Is 0.01 to 1% by weight.
- the concentration of the carbon radical generator in the semiconductor surface treating agent composition of the present invention is usually 0.05 to 10% by weight, preferably 0.1 to 2% as the concentration of the carbon radical generator with respect to the total amount of the composition. % By weight.
- the concentration of water in the semiconductor surface treating agent composition of the present invention is usually 0.02 to 10% by weight, preferably 0.03 to 5% by weight as the concentration of the water relative to the total amount of the composition.
- the concentration of the acid in the semiconductor surface treating agent composition of the present invention is usually 0.1 to 5% by weight, preferably 0.1 to 1% by weight as the concentration of the acid relative to the total amount of the composition.
- the concentration of the organic solvent in the semiconductor surface treating agent composition of the present invention is usually 80 to 99% by weight, preferably 90 to 99% by weight as the concentration of the organic solvent relative to the total amount of the composition.
- the concentration of the reducing agent in the semiconductor surface treating agent composition of the present invention is usually 0.001 to 5% by weight, preferably 0.001 to 1% by weight as the concentration of the reducing agent with respect to the total amount of the composition. .
- the concentration of the surfactant in the semiconductor surface treating agent composition of the present invention is usually 0.05 to 5% by weight, preferably 0.1 to 3% by weight as the concentration of the surfactant with respect to the total amount of the composition. It is.
- the semiconductor surface treating agent composition of the present invention contains water and, in some cases, further contains an organic solvent, so that it is used as it is for the treatment of the semiconductor surface, but in order to maintain a certain degree of peeling performance,
- the pH range is usually desirably 11 or less.
- the pH of the composition is preferably acidic to neutral, and the range is 7 or less, more preferably 1 to 4. is there.
- pH adjustment suitably so that it may become in said range by adjusting the kind of acid, density
- the semiconductor surface treating agent composition of the present invention may be appropriately added with components that do not interfere with the effects of the present invention, such as a metal corrosion inhibitor, as necessary. it can.
- the metal corrosion inhibitor examples include benzotriazole or benzotriazole derivatives such as carboxybenzotriazole and aminobenzotriazole, thioureas such as thiourea, such as mercaptothiazole, mercaptoethanol, and thioglycerol.
- thioureas such as thiourea
- mercaptothiazole mercaptoethanol
- thioglycerol examples include thiol compounds such as 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 method for preparing the semiconductor surface treating agent composition of the present invention is not particularly limited as long as it is usually carried out in this field.
- a composition for peeling off only the antireflection film layer for example, To a solution charged with a predetermined amount of water, a compound that generates fluorine ions and a carbon radical generator in water are added and stirred at room temperature. If necessary, an acid is further added to adjust the pH to a desired value.
- the semiconductor surface treating agent composition may be used.
- a composition for peeling off not only the antireflection film layer but also the resist layer and the resist cured layer simultaneously with the antireflection film layer for example, in a solution charged with a predetermined amount of water, Add a compound that generates fluorine ions and a carbon radical generator, and stir at room temperature. Then, while continuing stirring, add an organic solvent to the solution. If necessary, add a reducing agent, a surfactant, and an acid. It may be adjusted to the pH of the semiconductor surface treating agent composition of the present invention.
- the above preparation is performed in a specific region required for the carbon radical generator such as a yellow lamp to generate a carbon radical. It is desirable to carry out in an illumination where light of a wavelength is cut or in a dark place.
- the substrate to be subjected to the semiconductor surface treatment method of the present invention is usually a substrate manufactured in a manufacturing process of a semiconductor element, a liquid crystal display element, etc., and a metal wiring or an insulating film such as a low-k film is laid.
- examples of the antireflection film layer include an upper antireflection film (Top (Anti-Reflection Coating) (TARC) layer, a lower antireflection film (Bottom Anti-Reflection Coating) (BARC) layer, and the like.
- TARC Topic
- BARC Bottom Anti-Reflection Coating
- the semiconductor surface treating agent composition of the present invention is cured by etching the surface of the resist layer during the etching process in the manufacturing process of a semiconductor element or the like, and is more difficult to peel off. Since the resist layer, that is, the resist cured layer can be peeled off, the resist layer applied on the antireflection film layer and the resist cured layer can be effectively peeled off.
- BARCBA Anti-Reflection Coating BARC It may be a layer.
- the semiconductor surface treating agent composition of the present invention may be an anti-reflection film (Top-Anti-Reflection-Coating (TARC)) applied to the upper layer of the resist layer if an appropriate composition is used. Needless to say, even the layer can be peeled off together with the resist layer.
- TARC Topic-Anti-Reflection-Coating
- the low-k film mentioned here includes, for example, a fluorine-containing silicon oxide film applied to the lower layer of a treatment layer such as an antireflection film layer or a resist layer, and has a relative dielectric constant of 4 or less, preferably 3 or less insulating films (including porous low-k films and ultra low-k films).
- a substrate to be subjected to the semiconductor surface processing method of the present invention for example, a substrate in which an antireflection film layer is applied to an upper layer of a wafer on which metal wiring, an insulating film, etc. are laid (exfoliation of only the antireflection film layer) And a substrate on which a resist layer is applied on the antireflection film layer described above, and a substrate on which a cured resist layer is formed (not only the antireflection film layer, but also a resist layer and a resist). This will be described by way of example.
- the semiconductor surface treating agent composition of the present invention for example, a compound that generates fluorine ions in water, a carbon radical generator, water, if necessary.
- a solution of the composition prepared with the acid within the predetermined concentration range described above is prepared.
- the substrate on which the above-described antireflection film layer is applied to this solution is usually irradiated with light having a wavelength of 200 to 750 nm, preferably 200 to 450 nm, or usually 30 to 70 ° C., preferably 30 While heating at ⁇ 50 ° C., it is usually immersed for 1 to 30 minutes, preferably 1 to 5 minutes. In this way, peeling of the antireflection film layer is achieved.
- the compound for generating fluorine ions in water, carbon, as the semiconductor surface treating agent composition of the present invention A solution of the composition prepared in the predetermined concentration range described above is prepared with a radical generator, water, an organic solvent, and if necessary, an acid, a reducing agent, a surfactant and the like.
- the substrate on which the above-mentioned resist cured layer is formed in this solution is usually irradiated with light having a wavelength of 200 to 750 nm, preferably 200 to 450 nm, or usually 30 to 70 ° C., preferably 30 to While heating at 50 ° C., it is usually immersed for 1 to 30 minutes, preferably 1 to 5 minutes. In this way, not only the antireflection film layer but also the peeling of the resist layer and the resist cured layer, that is, the treatment of the semiconductor surface is achieved.
- a radical generation method at the time of immersion it is advantageous in terms of cost performance if a method based on light irradiation is used instead of heating, and it is easy to control the generation of radicals of the carbon radical generator, and low There is an advantage that the insulating film such as the -k film is hardly affected. For this reason, if the light irradiation of said preferable wavelength is employ
- adopting immersion using light irradiation you may make it continue light irradiation during immersion, and may use the said composition which irradiated light previously as immersion solution.
- the immersion temperature in the case of employing the immersion using light irradiation may be room temperature as a matter of course, but it is also possible to use light irradiation and heating together by heating.
- the substrate on which the above-mentioned resist cured layer is formed may be left still during the immersion, or may be immersed while being moved by a conveyor or the like.
- the composition may be sprayed without being immersed.
- the composition may be immersed while being bubbled with nitrogen gas or the like.
- area is enough for the apparatus required for immersion, spraying, heating, light irradiation, bubbling, etc.
- substrates that have been treated so far include substrates that have been coated only with an antireflection film layer or substrates that have a resist layer coated on top of the antireflection film layer and a cured resist layer formed on the surface.
- substrates on which the resist cured layer is formed only the resist cured layer and the resist layer are peeled off, and the substrate on which the treatment layer is only the antireflection film layer is If the method described above, that is, the method for removing only the antireflection film layer is appropriately employed, the antireflection film layer can be removed, that is, the semiconductor surface can be treated.
- the above-described method that is, not only the antireflection film layer but also the resist layer and the resist cured layer is applied to the substrate coated with the antireflection film layer and the resist layer, in which the above resist cured layer does not exist. If a method for the purpose of peeling is appropriately employed, peeling of both the antireflection film layer and the resist layer, that is, treatment of the semiconductor surface is possible. Furthermore, since the semiconductor surface treating agent composition of the present invention does not contain a component that adversely affects metal wiring such as a compound that generates oxygen radicals such as an oxygen radical generator, for example, in the treatment of a semiconductor substrate having a multilayer copper wiring structure. It is effective, and the above processing method can be applied to a semiconductor substrate having a multilayer copper wiring structure.
- the treatment method of the present invention does not require a washing (peeling) step of the residue of the ashed resist layer and the residue of the antireflection film layer after the ashing step and the ashing step which have been conventionally performed,
- This is an excellent processing method capable of simultaneously removing not only the antireflection film layer but also the resist layer and the cured resist layer only by immersion by heating or light irradiation.
- a silicon wafer having a side of 300 mm was coated with an antireflection film layer (BARC layer), and a resist layer was coated on the antireflection film layer.
- BARC layer antireflection film layer
- This substrate sample is subjected to dry etching by ion sputtering to form a resist cured layer on the surface of the resist layer to obtain a substrate with a resist cured layer, and then the substrate is cut into pieces of 20 mm ⁇ 20 mm.
- Example 1 Preparation of Semiconductor Surface Treatment Agent Composition (1) of the Present Invention
- 1.94 g of water and 1.29 g of sodium alkylsulfosuccinate Naocol P (Daiichi Kogyo Seiyaku Co., Ltd.)
- composition (1) of the present invention After confirming dissolution of ammonium fluoride and Irgacure 369, while continuing stirring, 96 g of ⁇ -butyrolactone was added to the solution, 0.01 g of ascorbyl palmitate was further added, and then 0.2 g of citric acid was added to adjust the pH. Was adjusted to 2 to obtain a composition (1) of the present invention.
- Examples 2 to 11 Preparation of Semiconductor Surface Treatment Agent Compositions (2) to (11) of the Present Invention
- each component shown in Table 1 was used except that the amounts shown in Table 1 were charged.
- compositions (2) to (11) of the present invention were obtained.
- Table 1 shows the compositions of the compositions (1) to (11) of the present invention.
- the numerical value shown in Table 1 is% concentration of each component when the total amount of the composition is 100%.
- Comparative Examples 1 to 3 Preparation of Comparative Compositions (1) to (3)
- Comparative Examples 1 to 2 acetone or dimethylformamide (DMF) was used instead of ⁇ -butyrolactone, which is an organic solvent in the composition of the present invention.
- Comparative compositions (1) to (2) were obtained in the same manner as in Example 1 except that the amounts shown in Table 2 were used.
- a comparative composition (3) was prepared in the same manner as in Example 1 except that hydrogen peroxide was used instead of the carbon radical generator in the composition of the present invention and the amounts shown in Table 2 were charged.
- Table 2 shows the compositions of the comparative compositions (1) to (3).
- the numerical value shown in Table 2 is the% concentration of each component when the total amount of the composition is 100%.
- Example 12 Evaluation of Semiconductor Surface Treatment Agent Composition (1) of the Present Invention
- 50 mL of the composition (1) of the present invention prepared in Example 1 was placed, and the evaluation substrate described above
- the sample was kept immersed at room temperature for 30 minutes with gentle stirring while irradiating light with a central wavelength of 320 nm with an ultraviolet irradiation device (with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Co., Ltd.). Thereafter, the substrate was rinsed with pure water for 30 seconds, and the substrate surface was dried with compressed air.
- an ultraviolet irradiation device with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Co., Ltd.
- the resist layer and the resist cured layer were peeled off satisfactorily without any residue, and 90% or more of the antireflection film layer was peeled off. .
- the substrate sample for evaluation is immersed in the composition of the present invention for 30 minutes while irradiating with light, not only the antireflection film layer (BARC layer) but also the resist layer and the cured resist layer can be simultaneously peeled off. understood.
- compositions (2) to (9) of the present invention were the same as in Example 12. The method was immersed for a predetermined time, and the peeling performance of the resist layer, the resist cured layer and the antireflection film layer was visually observed. The results are shown in Table 3 together with the results of Example 12. In Example 17, it was confirmed that ammonium fluoride crystals were precipitated in the dipping solution.
- the carbon radical generator is a compound (photo radical generator) that suitably generates carbon radicals by light irradiation
- BARC layer antireflection film layer
- the resist layer and the resist cured layer can be peeled well.
- an organic solvent such as a mixed solvent of ⁇ -butyrolactone and isopropyl alcohol or a mixed solvent of N-methylpyrrolidone and isopropyl alcohol was used for 5 minutes.
- Example 17 using the composition (6) of the present invention
- Examples 13 to 16 and 18 to 20 an acid was added to enable the use of ammonium fluoride. It was found that peeling can be accomplished in a short time by assisting the solubilization and making the pH acidic to 4 or less.
- Example 21 Evaluation of Semiconductor Surface Treatment Agent Composition (10) of the Present Invention 50 mL of the composition (10) of the present invention prepared in Example 10 was placed in a 200 mL polybeaker and heated to 40 ° C. in advance. Heated for 10 minutes. The evaluation substrate sample described above was immersed in this heated solution for 5 minutes while gently 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 layer, the resist cured layer, and the antireflection film layer were all peeled off satisfactorily.
- Example 22 Evaluation of Semiconductor Surface Treatment Agent Composition (11) of the Present Invention
- immersion was performed for 3 minutes in the same manner as in Example 21 except that the composition (11) of the present invention was used. After performing, rinse washing and drying were performed, and the substrate sample after drying was visually observed. As a result, it can be confirmed that all of the resist layer, the resist cured layer and the antireflection film layer can be satisfactorily peeled off, and if the evaluation substrate sample is immersed in the preheated composition of the present invention for 3 minutes, It was found that not only the antireflection film layer (BARC layer) but also the resist layer and the cured resist layer can be peeled off simultaneously.
- BARC layer antireflection film layer
- Example 23 Evaluation of preliminary light irradiation using the semiconductor surface treating agent composition (2) of the present invention
- 50 mL of the composition (2) of the present invention prepared in Example 2 was put in advance.
- irradiation with light having a central wavelength of 320 nm was continued for 3 minutes with an ultraviolet irradiation device (with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Corporation).
- UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Corporation UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Corporation.
- the substrate sample for evaluation described above was kept immersed in the solution previously irradiated with light in this way for 3 minutes while gently stirring.
- light irradiation was not performed during immersion.
- the substrate was rinsed with pure water for 30 seconds, and the substrate surface was dried with compressed air.
- the substrate sample after drying was visually observed, it was confirmed that the resist layer, the resist cured layer, and the antireflection film layer (BARC layer) were all peeled off satisfactorily.
- Example 23 when a compound (photo radical generator) that suitably generates carbon radicals by light irradiation is used as the carbon radical generator, immersion is performed by previously performing light irradiation to generate carbon radicals. In the meantime, it was found that the film could be peeled well without light irradiation. In addition, even when the light irradiation has been performed in advance, the carbon radical generated by the light irradiation is not immediately deactivated in the semiconductor surface treating agent composition of the present invention because it can be satisfactorily peeled off. Conceivable.
- Comparative Examples 4 to 5 Evaluation of Comparative Compositions (1) to (2) In a 200 mL poly beaker, the comparative composition (1) prepared in Comparative Example 1 and the comparative composition prepared in Comparative Example 2 (2 ) was placed in a separate poly beaker, and the substrate sample for evaluation described above was subjected to light having a central wavelength of 320 nm with an ultraviolet irradiation device (with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Corp.) at room temperature. While being irradiated, it was kept immersed for 30 minutes with gentle stirring. However, despite being kept immersed for 30 minutes, the resist layer and the cured resist layer could not be peeled off, and the antireflection film layer (BARC layer) underneath could hardly be peeled off.
- an ultraviolet irradiation device with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Corp.
- the resist layer and the cured resist layer could not be peeled off, and this was applied to the lower layer of the resist layer. It is considered that the antireflection film layer (BARC layer) could not be peeled off. Therefore, in the present invention, the BARC layer, the resist layer, and the resist cured layer are processed at the same time by treating a substrate on which the antireflection film layer is a BARC layer and a resist layer or a resist cured layer is applied thereon. It was found that it is necessary to use the specific organic solvent described above when attempting to peel off.
- Example 24 Evaluation to copper wiring using semiconductor surface treating agent composition (2) of the present invention
- a Cu / Low-k substrate The low-k film was immersed in Black diamond-1) for 10 minutes. Thereafter, the substrate was taken out of the immersion liquid, and the substrate surface was dried with compressed air. The substrate sample after drying was confirmed with an optical microscope (1000 times), and the influence of the composition of the present invention on the surface of the copper layer was evaluated. The surface of the copper layer after immersion for 10 minutes had a metallic luster. It was confirmed that no oxide film was formed.
- Comparative Example 6 Evaluation to Copper Wiring Using Comparative Composition (3)
- a Cu / Low-k substrate (Low-k film is Black diamond). -1) was immersed for 5 minutes. Thereafter, the substrate was taken out of the immersion liquid, and the substrate surface was dried with compressed air.
- the substrate sample after drying was confirmed with an optical microscope (1000 times) and the effect of the comparative composition on the surface of the copper layer was evaluated, the surface of the copper layer after immersion for 5 minutes had no metallic luster. It was confirmed that an oxide film of copper oxide was formed on the surface of the copper layer.
- the comparative composition (3) affects the surface of the copper layer and forms an oxide film.
- Example 24 and Comparative Example 6 when a radical generator that generates an oxygen radical such as hydrogen peroxide (oxygen radical generator) is used, the surface is oxidized to the copper layer surface. It was found that the composition of the present invention has no such influence on the surface of the copper layer, although it has an effect of forming a film. From these results, for example, even when the semiconductor substrate has a multilayer copper wiring structure, the composition of the present invention does not affect the surface of the copper layer, and does not affect the surface of the copper layer. It was found that not only the layer but also the resist layer and the resist cured layer can be peeled well. Note that the influence of the oxygen radical generator was not evaluated only with hydrogen peroxide, but was evaluated by adding hydrogen peroxide to each component of the composition of the present invention other than the carbon radical generator. Is also supported.
- oxygen radical generator oxygen radical generator
- Example 25 Evaluation to Low-k Film Using Semiconductor Surface Treatment Agent Composition (2) of the Present Invention
- a Low-k film was added to a 50 mL solution of the composition (2) of the present invention prepared in Example 2.
- the coated substrate was immersed for 30 minutes. Thereafter, the substrate was taken out of the immersion liquid, and the substrate surface was dried with compressed air.
- XPS X-ray photoelectron spectrometer
- the composition of the present invention is a substrate coated with a low-k film as an insulating film
- the anti-reflection film layer or the anti-reflection film layer can be used without affecting the low-k film.
- the resist layer and the cured resist layer can be peeled well.
- Example 26 Preparation of Semiconductor Surface Treatment Agent Composition (12) of the Present Invention
- a yellow lamp straight tube yellow fluorescent lamp FLR40SY- manufactured by Mitsubishi Electric OSRAM Co., Ltd.
- IC / M under irradiation of 0.06 g of ammonium fluoride and 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1 (Irgacure 369 (manufactured by Ciba Specialty Chemicals)) 0.5g was added and it stirred at room temperature, and obtained the composition (12) of this invention of pH6.
- Examples 27 to 28 Preparation of semiconductor surface treating agent compositions (13) to (14) of the present invention
- the compositions (13) to (14) of the present invention were obtained in the same manner as in Example 26, except that the components shown in Table 4 were used and the amounts shown in Table 4 were charged. It was.
- Table 4 shows the compositions of the compositions (12) to (14) of the present invention.
- the numerical value shown in Table 4 is the% concentration of each component when the total amount of the composition is 100%.
- Comparative Example 7 Preparation of Comparative Composition (4) To a solution prepared by adding 99.94 g of water to a 200 mL poly beaker, 0.06 g of ammonium fluoride was added, stirred at room temperature, and a comparative composition of pH 6 ( 4) was obtained.
- Example 29 Evaluation of Semiconductor Surface Treatment Agent Composition (12) of the Present Invention In a 200 mL polybeaker, 50 mL of the composition (12) of the present invention prepared in Example 26 was placed, and the evaluation substrate described above The substrate having the anti-reflection film layer exposed by removing the sample resist layer and the cured resist layer is center wavelength with an ultraviolet irradiation device (with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Co., Ltd.) at room temperature. While irradiating light of 320 nm, it was immersed while gently stirring, and peeling of the antireflection film layer during the immersion was visually observed. As a result, peeling of the antireflection film layer was confirmed after 3 minutes of immersion, and it was confirmed that the antireflection film layer was completely peeled after 15 minutes of immersion.
- an ultraviolet irradiation device with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Co., Ltd
- Example 30 Evaluation of Semiconductor Surface Treatment Agent Composition (13) of the Present Invention
- immersion was performed in the same manner as in Example 29 except that the composition (13) of the present invention was used.
- the peeling of the antireflection film layer was visually observed.
- the composition (13) of the present invention was used, it was confirmed that the antireflection film layer was completely peeled after 3 minutes of immersion.
- Example 31 Evaluation of Semiconductor Surface Treatment Agent Composition (14) of the Present Invention 50 mL of the composition (14) of the present invention prepared in Example 28 was placed in a 200 mL polybeaker, and the evaluation substrate described above The substrate from which the resist layer and the cured resist layer of the sample were removed and the antireflection film layer was exposed was immersed in the solution of the composition (14) heated to 40 ° C. The antireflection film layer was peeled off visually. As a result, it was confirmed that the antireflection film layer was completely peeled after 3 minutes of immersion.
- Comparative Example 8 Evaluation of Comparative Composition (4) 50 mL of the comparative composition (4) prepared in Comparative Example 7 was placed in a 200 mL poly beaker, and the above-described evaluation substrate sample resist layer and resist curing The substrate from which the layer was removed and the antireflection film layer was exposed was irradiated with light having a central wavelength of 320 nm at room temperature with an ultraviolet irradiation device (with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Co., Ltd.). The film was immersed while gently stirring, and peeling of the antireflection film layer during the immersion was visually observed. However, the antireflection film layer could not be peeled at all even though the immersion was continued for 30 minutes.
- an ultraviolet irradiation device with UV irradiation device MUV-35U MUV-PF001 filter manufactured by Moritex Co., Ltd.
- compositions (12) to (13) of the Present Invention In the composition (12) of the present invention prepared in Example 26 and Example 27 50 mL of the prepared composition (13) of the present invention is put into a separate 200 mL polybeaker, and the resist layer and the cured resist layer of the evaluation substrate sample described above are removed to expose the antireflection film layer. The substrate was immersed at room temperature without irradiating ultraviolet rays while gently stirring, and peeling of the antireflection film layer during the immersion was visually observed. However, the antireflection film layer could not be peeled at all even though the immersion was continued for 30 minutes.
- Comparative Example 11 Evaluation without Heating Using Semiconductor Surface Treatment Agent Composition (14) of the Invention 50 mL of the composition (14) prepared in Example 28 was placed in a 200 mL polybeaker and described above. The substrate from which the resist layer and the cured resist layer of the evaluation substrate sample are removed and the antireflection film layer is exposed is immersed at room temperature without heating, with gentle stirring, and the antireflection film in the immersion The peeling of the layer was visually observed. However, the antireflection film layer could not be peeled at all even though the immersion was continued for 30 minutes.
- the antireflection film layer can be peeled off only by using a combination of a compound that generates fluorine ions in water and a carbon radical generator. Even if the agent is either a compound that suitably generates carbon radicals by light irradiation (photo radical generator) or a compound that suitably generates carbon radicals by heating (thermal radical generator), the antireflection film layer can be satisfactorily formed. It turned out that it can peel. Furthermore, by adding an acid to the composition of the present invention to facilitate the production of hydrofluoric acid in ammonium fluoride water, the antireflection film layer can be peeled off in a shorter time. It turned out that it becomes.
- Examples 32-36 Preparation of Semiconductor Surface Treatment Agent Compositions (15)-(19) of the Present Invention
- each component shown in Table 5 was used, except that the amounts shown in Table 5 were charged.
- compositions (15) to (19) of the present invention were obtained.
- Table 5 shows the compositions of the compositions (15) to (19) of the present invention.
- the numerical value shown in Table 5 is the% concentration of each component when the total amount of the composition is 100%.
- Example 37 Evaluation of Semiconductor Surface Treatment Agent Composition (1) of the Present Invention 50 mL of the composition (1) of the present invention prepared in Example 1 was placed in a 200 mL polybeaker, and the evaluation substrate described above The sample was kept immersed at room temperature for 5 minutes with gentle stirring while irradiating light with a central wavelength of 320 nm with an ultraviolet irradiation device (UV irradiation device MUV-35U MUV-PF001 with a filter manufactured by Moritex Co., Ltd.). Thereafter, the substrate was rinsed with pure water for 30 seconds, and the substrate surface was dried with compressed air.
- UV irradiation device MUV-35U MUV-PF001 UV irradiation device
- Example 12 is an evaluation result when the substrate sample for evaluation is kept immersed in the composition (1) of the present invention for 30 minutes.
- Example 37 is an example using the same composition (1). 12 shows an evaluation result when the evaluation substrate sample is continuously immersed for 5 minutes under the same conditions as in FIG. From this result, the composition (1) of the present invention can be applied to the antireflection film layer (BARC) even if the substrate sample is not immersed for a long time (30 minutes), that is, only for a short time (5 minutes). It was confirmed that not only the layer) but also the resist layer and the resist hardened layer can be peeled off simultaneously.
- BARC antireflection film layer
- Examples 38 to 42 Evaluation of Semiconductor Surface Treatment Agent Compositions (15) to (19) of the Present Invention were the same as in Example 12. The method was immersed for 5 minutes, and the peeling performance of the resist layer, the resist cured layer and the antireflection film layer was visually observed. The results are shown in Table 6 together with the results of Example 37.
- Carbon radical generators such as azonitrile carbon radical generators, azoamide carbon radical generators, chain azoamidine carbon radical generators, cyclic azoamidine carbon radical generators, azoester carbon radical generators, etc. Although carbon radicals are generated, even if carbon radicals are generated by light irradiation using such a carbon radical generator, not only an antireflection film layer (BARC layer) but also a resist layer and a resist cured layer It was found that it can be peeled well.
- BARC layer antireflection film layer
- the semiconductor substrate surface having an antireflection film layer or the like is treated with the semiconductor surface treating agent composition of the present invention, it can be expected that these layers can be efficiently peeled off in a short time, For example, a semiconductor substrate in which copper wiring such as a multilayer copper wiring structure is laid as a semiconductor metal wiring, or an insulating film that is susceptible to alkali such as a low-k film in the lower layer of the processing layer is affected. It can be expected that the above layer can be peeled efficiently without giving.
- the semiconductor surface treating agent composition of the present invention has excellent peeling performance such as being able to peel off the antireflection film layer in the production process of a semiconductor element or the like in a short time and efficiently, and further, an organic solvent or the like.
- the component not only the antireflection film layer but also the resist layer and the cured resist layer can be peeled off simultaneously with the antireflection film layer.
- the semiconductor surface treating agent composition of the present invention is applied to the semiconductor substrate having these structures. It can be used suitably.
- the semiconductor surface treatment method of the present invention is a method that can easily and quickly remove not only the antireflection film layer or the antireflection film layer but also the resist layer and the resist cured layer at the same time. Further, these processing layers can be peeled off without performing complicated processing such as an ashing process conventionally performed.
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Abstract
Description
200mLのポリビーカーに、水1.94g及びアルキルスルホコハク酸ナトリウム(ネオコールP(第一工業製薬株式会社製))1.29gを仕込んだ溶液に、イエローランプ(三菱電機オスラム株式会社製 直管イエロー蛍光ランプ FLR40SY-IC/M)の照射下で、フッ化アンモニウム0.06g及び2-ベンジル-2-ジメチルアミノ-1-(4-モルホリノフェニル)-ブタノン-1(イルガキュア369(チバ・スペシャルティ・ケミカルズ社製))0.5gを加え、室温で攪拌した。フッ化アンモニウム及びイルガキュア369の溶解を確認した後、攪拌を続けながら、その溶液にγ-ブチロラクトン96gを加え、更に、パルミチン酸アスコルビル0.01gを加えた後、クエン酸0.2gを加えてpHを2に調節して、本発明の組成物(1)とした。
実施例2~11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)~(11)を得た。本発明の組成物(1)~(11)の組成を表1に示す。なお、表1に示す数値は、組成物の総量を100%とした場合における各成分の%濃度である。
比較例1~2では、本発明の組成物における有機溶剤であるγ-ブチロラクトンの代わりに、アセトン又はジメチルホルムアミド(DMF)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(1)~(2)を得た。比較例3では、本発明の組成物における炭素ラジカル発生剤の代わりに、過酸化水素を用いて表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)を得た。比較用組成物(1)~(3)の組成を表2に示す。なお、表2に示す数値は、組成物の総量を100%とした場合における各成分の%濃度である。
200mLのポリビーカーに、実施例1で調製した本発明の組成物(1)の50mLを入れ、上で述べた評価用基板サンプルを、室温で、紫外線照射装置(株式会社モリテックス製 UV照射装置 MUV-35U MUV-PF001 フィルター付き)で中心波長320nmの光を照射しながら、ゆるやかに攪拌しつつ30分間浸漬し続けた。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、レジスト層及びレジスト硬化層については残渣もなく良好に剥離できており、反射防止膜層については、その90%以上が剥離できていることを確認した。その結果、評価用基板サンプルを、光照射しながら本発明の組成物中に30分間浸漬すれば、反射防止膜層(BARC層)のみならず、レジスト層やレジスト硬化層をも同時に剥離できることが判った。
実施例13~20では、本発明の組成物(2)~(9)について実施例12と同様の方法により、所定の時間浸漬を行って、レジスト層、レジスト硬化層及び反射防止膜層の剥離性能を目視で観察した。その結果を実施例12の結果も併せて表3に示す。なお、実施例17では、浸漬中の溶液にフッ化アンモニウムの結晶が析出していることが確認された。
200mLのポリビーカーに、実施例10で調製した本発明の組成物(10)の50mLを入れ、予め40℃に加温し、10分間加熱した。この加熱した溶液に、上で述べた評価用基板サンプルを、ゆるやかに攪拌しつつ5分間浸漬し続けた。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、レジスト層、レジスト硬化層及び反射防止膜層のすべてが良好に剥離できていることが確認できた。その結果、評価用基板サンプルを、予め加熱した本発明の組成物中に5分間浸漬すれば、反射防止膜層(BARC層)のみならず、レジスト層やレジスト硬化層をも同時に剥離できることが判った。
実施例22では、本発明の組成物(11)を用いた以外は、実施例21と同様の方法により、3分間浸漬を行った後、リンス洗浄、乾燥を行い、乾燥後の基板サンプルを目視で観察した。その結果、レジスト層、レジスト硬化層及び反射防止膜層のすべてが良好に剥離できていることが確認でき、評価用基板サンプルを、予め加熱した本発明の組成物中に3分間浸漬すれば、反射防止膜層(BARC層)のみならず、レジスト層やレジスト硬化層をも同時に剥離できることが判った。
200mLのポリビーカーに、実施例2で調製した本発明の組成物(2)の50mLを入れ、予め室温で、紫外線照射装置(株式会社モリテックス製 UV照射装置 MUV-35U MUV-PF001 フィルター付き)で中心波長320nmの光を3分間照射し続けた。次いで、このように予め光照射を行った当該溶液に、上で述べた評価用基板サンプルを、ゆるやかに攪拌しつつ3分間浸漬し続けた。なお、浸漬の間は光照射を行わなかった。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、レジスト層、レジスト硬化層及び反射防止膜層(BARC層)のすべてが良好に剥離できていることが確認できた。
200mLのポリビーカーに、比較例1で調製した比較用組成物(1)及び比較例2で調製した比較用組成物(2)の50mLを別々のポリビーカーに入れ、上で述べた評価用基板サンプルを、室温で、紫外線照射装置(株式会社モリテックス製 UV照射装置 MUV-35U MUV-PF001 フィルター付き)で中心波長320nmの光を照射しながら、ゆるやかに攪拌しつつ30分間浸漬し続けた。しかしながら、30分間も浸漬し続けたのにもかかわらず、レジスト層及びレジスト硬化層が剥離できず、その下層にある反射防止膜層(BARC層)もほとんど剥離できなかった。
実施例2で調製した本発明の組成物(2)の溶液50mLに、Cu/Low-k基板(Low-k膜はBlack diamond-1)を10分間浸漬した。その後、当該基板を浸漬液から取り出し、基板表面を圧縮空気で乾燥した。この乾燥後の基板サンプルを光学顕微鏡(1000倍)で確認して、本発明の組成物の銅層表面への影響について評価したところ、10分浸漬後の基板の銅層表面には金属光沢があり酸化皮膜が形成されていないことが確認された。また、原子間力顕微鏡(SII製 ナノピクス2100)で表面粗さを確認したところ、平均面粗さが、浸漬処理前の1nm以下から変化がないことも確認された。これらの結果から、本発明の半導体表面用処理剤組成物は、銅層表面には影響を及ぼさないことが判った。
比較例3で調製した比較用組成物(3)の溶液50mLに、Cu/Low-k基板(Low-k膜はBlack diamond-1)を5分間浸漬した。その後、当該基板を浸漬液から取り出し、基板表面を圧縮空気で乾燥した。この乾燥後の基板サンプルを光学顕微鏡(1000倍)で確認して、比較用組成物の銅層表面への影響について評価したところ、5分浸漬後の基板の銅層表面には金属光沢がなく銅層表面には酸化銅の酸化皮膜が形成されていることが確認された。また、原子間力顕微鏡(SII製 ナノピクス2100)で表面粗さを確認したところ、平均面粗さが、浸漬処理前の1nm以下から4nmまで大きくなり、平坦度が悪化していることも確認された。これらの結果から、比較用組成物(3)は、銅層表面に影響を及ぼし、酸化皮膜を形成させることが判った。
実施例2で調製した本発明の組成物(2)の50mL溶液に、Low-k膜が塗布された基板を30分間浸漬した。その後、当該基板を浸漬液から取り出し、基板表面を圧縮空気で乾燥した。この乾燥後の基板サンプルを、X線光電子分光装置(XPS)(クレイトス社製 AXIS-his)でLow-k膜表面を分析したところ、浸漬前後でスペクトルに変化がないことが確認された。この結果から、本発明の組成物は、絶縁膜としてLow-k膜が塗布された基板であっても、Low-k膜に影響を及ぼすことなく、反射防止膜層或いは反射防止膜層のみならず、レジスト層及びレジスト硬化層も良好に剥離できるものであることが判った。
200mLのポリビーカーに、水99.44gを仕込んだ溶液に、イエローランプ(三菱電機オスラム株式会社製 直管イエロー蛍光ランプ FLR40SY-IC/M)の照射下で、フッ化アンモニウム0.06g及び2-ベンジル-2-ジメチルアミノ-1-(4-モルホリノフェニル)-ブタノン-1(イルガキュア369(チバ・スペシャルティ・ケミカルズ社製))0.5gを加え、室温で攪拌して、pH6の本発明の組成物(12)を得た。
実施例27~28では、表4に示す各成分を用いて、表4に示す量を仕込んだ以外は、実施例26と同様にして、本発明の組成物(13)~(14)を得た。本発明の組成物(12)~(14)の組成を表4に示す。なお、表4に示す数値は、組成物の総量を100%とした場合における各成分の%濃度である。
200mLのポリビーカーに、水99.94gを仕込んだ溶液に、フッ化アンモニウム0.06gを加え、室温で攪拌して、pH6の比較用組成物(4)を得た。
200mLのポリビーカーに、実施例26で調製した本発明の組成物(12)の50mLを入れ、上で述べた評価用基板サンプルのレジスト層及びレジスト硬化層を除去して、反射防止膜層を露出させた基板を、室温で、紫外線照射装置(株式会社モリテックス製 UV照射装置 MUV-35U MUV-PF001 フィルター付き)で中心波長320nmの光を照射しながら、ゆるやかに攪拌しつつ浸漬し、浸漬中での反射防止膜層の剥離を目視で観察した。その結果、浸漬3分間後には、反射防止膜層の剥離が確認でき、浸漬15分後では、反射防止膜層が完全に剥離されていることが確認できた。
実施例30では、本発明の組成物(13)を用いた以外は、実施例29と同様の方法により、浸漬を行って、反射防止膜層の剥離を目視観察した。その結果、本発明の組成物(13)を用いた場合には、浸漬3分後には、反射防止膜層が完全に剥離されていることが確認できた。
200mLのポリビーカーに、実施例28で調製した本発明の組成物(14)の50mLを入れ、上で述べた評価用基板サンプルのレジスト層及びレジスト硬化層を除去して、反射防止膜層を露出させた基板を、40℃に加温した上記組成物(14)の溶液に浸漬し、ゆるやかに攪拌しながら、浸漬中での反射防止膜層の剥離を目視で観察した。その結果、浸漬3分後には、反射防止膜層が完全に剥離されていることが確認できた。
200mLのポリビーカーに、比較例7で調製した比較用組成物(4)の50mLを入れ、上で述べた評価用基板サンプルのレジスト層及びレジスト硬化層を除去して、反射防止膜層を露出させた基板を、室温で、紫外線照射装置(株式会社モリテックス製 UV照射装置 MUV-35U MUV-PF001 フィルター付き)で中心波長320nmの光を照射しながら、ゆるやかに攪拌しつつ浸漬し、浸漬中での反射防止膜層の剥離を目視で観察した。しかしながら、30分間も浸漬し続けたのにもかかわらず、反射防止膜層がまったく剥離できなかった。
実施例26で調製した本発明の組成物(12)及び実施例27で調製した本発明の組成物(13)の50mLを、別々の200mLのポリビーカーに入れ、上で述べた評価用基板サンプルのレジスト層及びレジスト硬化層を除去して、反射防止膜層を露出させた基板を、室温で、紫外線を照射せずに、ゆるやかに攪拌しつつ浸漬し、浸漬中での反射防止膜層の剥離を目視で観察した。しかしながら、30分間も浸漬し続けたのにもかかわらず、反射防止膜層がまったく剥離できなかった。
200mLのポリビーカーに、実施例28で調製した組成物(14)の50mLを入れ、上で述べた評価用基板サンプルのレジスト層及びレジスト硬化層を除去して、反射防止膜層を露出させた基板を、加熱をせずに室温で、ゆるやかに攪拌しつつ浸漬し、浸漬中での反射防止膜層の剥離を目視で観察した。しかしながら、30分間も浸漬し続けたのにもかかわらず、反射防止膜層がまったく剥離できなかった。
実施例32~36では、表5に示す各成分を用いて、表5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(15)~(19)を得た。本発明の組成物(15)~(19)の組成を表5に示す。なお、表5に示す数値は、組成物の総量を100%とした場合における各成分の%濃度である。
200mLのポリビーカーに、実施例1で調製した本発明の組成物(1)の50mLを入れ、上で述べた評価用基板サンプルを、室温で、紫外線照射装置(株式会社モリテックス製 UV照射装置 MUV-35U MUV-PF001 フィルター付き)で中心波長320nmの光を照射しながら、ゆるやかに攪拌しつつ5分間浸漬し続けた。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、レジスト層及びレジスト硬化層については残渣もなく良好に剥離できており、反射防止膜層については、その90%以上が剥離できていることを確認した。実施例12は、本発明の組成物(1)に評価用基板サンプルを30分間浸漬し続けた場合の評価結果であるが、実施例37は、同一の組成物(1)を用い、実施例12と同一条件で評価用基板サンプルを5分間浸漬し続けた場合の評価結果である。この結果から、本発明の組成物(1)は、基板サンプルを長時間(30分間)浸漬せずとも、すなわち、短時間(5分間)浸漬しただけであっても、反射防止膜層(BARC層)のみならず、レジスト層やレジスト硬化層をも同時に剥離できることを確認した。
実施例38~42では、本発明の組成物(15)~(19)について実施例12と同様の方法により、5分間浸漬を行って、レジスト層、レジスト硬化層及び反射防止膜層の剥離性能を目視で観察した。その結果を実施例37の結果も併せて表6に示す。
Claims (22)
- 水中でフッ素イオンを発生する化合物、炭素ラジカル発生剤及び水とを含有することを特徴とする半導体表面用処理剤組成物。
- 更に酸を含有することを特徴とする請求項1に記載の組成物。
- 更に有機溶剤を含有することを特徴とする請求項1に記載の組成物。
- 更に還元剤を含有することを特徴とする請求項3に記載の組成物。
- 更に界面活性剤を含有することを特徴とする請求項4に記載の組成物。
- 前記半導体表面用処理剤が、反射防止膜層用剥離剤である請求項1に記載の組成物。
- 前記半導体表面用処理剤が、BARC層用剥離剤である請求項3に記載の組成物。
- 前記水中でフッ素イオンを発生する化合物が、フッ化水素酸と無機非金属の塩基との塩である請求項1に記載の組成物。
- 前記フッ化水素酸と無機非金属の塩基との塩が、フッ化アンモニウムである請求項8に記載の組成物。
- 前記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。
- 前記酸が、脂肪族又は芳香族ジカルボン酸及び脂肪族又は芳香族ヒドロキシカルボン酸から選ばれる少なくとも1種のものである請求項2に記載の組成物。
- 前記脂肪族又は芳香族ジカルボン酸及び脂肪族又は芳香族ヒドロキシカルボン酸が、シュウ酸、マロン酸、コハク酸、グルタル酸、アジピン酸、ピメリン酸、マレイン酸、フマル酸、リンゴ酸、酒石酸、クエン酸及びフタル酸から選ばれる少なくとも1種のものである請求項11に記載の組成物。
- 前記脂肪族又は芳香族ジカルボン酸及び脂肪族又は芳香族ヒドロキシカルボン酸が、シュウ酸、リンゴ酸、酒石酸及びクエン酸から選ばれる少なくとも1種のものである請求項11に記載の組成物。
- 前記有機溶剤が、アルコール系、エステル系、アミド系又はスルホキシド系の有機溶剤から選ばれる少なくとも1種のものであって、選ばれた各々の有機溶剤自体の双極子モーメントが1.5~7.5debyeであり、かつ選ばれた各々の有機溶剤自体の比重が0.7~1.2の範囲のものである請求項3に記載の組成物。
- 前記有機溶剤が、イソプロピルアルコール、γ-ブチロラクトン、N-メチルピロリドンから選ばれる少なくとも1種のものである請求項3に記載の組成物。
- 前記還元剤が、アスコルビン酸及びアスコルビン酸エステルから選ばれる少なくとも1種のものである請求項4に記載の組成物。
- 前記半導体表面用処理剤が反射防止膜層用剥離剤であって、当該反射防止膜層の下層がLow-k膜である、pH7以下の請求項2に記載の組成物。
- 前記半導体表面用処理剤が反射防止膜層用剥離剤であって、当該反射防止膜層の下層がLow-k膜である、pHが1~4の範囲の請求項2に記載の組成物。
- 前記水中でフッ素イオンを発生する化合物の重量%が0.01~5重量%、前記炭素ラジカル発生剤の重量%が0.05~10重量%、前記水の重量%が0.02~10重量%、前記酸の重量%が0.1~5重量%、前記有機溶剤の重量%が80~99重量%、前記還元剤の重量%が0.001~5重量%、及び前記界面活性剤の重量%が0.05~5重量%である、請求項5に記載の組成物。
- 多層銅配線構造の半導体基板に使用するものである請求項1に記載の組成物。
- 多層銅配線構造の半導体基板に使用するものである請求項3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半導体表面の処理方法。
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US12/921,302 US8828918B2 (en) | 2008-03-07 | 2009-03-06 | Semiconductor surface treating agent composition and method for treating semiconductor surface using the semiconductor surface treating agent composition |
JP2010501971A JP5375820B2 (ja) | 2008-03-07 | 2009-03-06 | 半導体表面用処理剤組成物及びそれを用いた半導体表面の処理方法 |
CN200980108005.3A CN101960388B (zh) | 2008-03-07 | 2009-03-06 | 半导体表面用处理剂组合物和使用该组合物的半导体表面的处理方法 |
EP09716388.5A EP2249206B1 (en) | 2008-03-07 | 2009-03-06 | Semiconductor surface treating agent composition and method for treating semiconductor surface using the semiconductor surface treating agent composition |
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EP (1) | EP2249206B1 (ja) |
JP (1) | JP5375820B2 (ja) |
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CN (1) | CN101960388B (ja) |
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JPWO2011027772A1 (ja) * | 2009-09-02 | 2013-02-04 | 和光純薬工業株式会社 | 半導体表面用処理剤組成物及びそれを用いた半導体表面の処理方法 |
CN103076725A (zh) * | 2013-01-31 | 2013-05-01 | 北京七星华创电子股份有限公司 | 一种去除光刻胶的溶液及其应用 |
WO2015111640A1 (ja) | 2014-01-24 | 2015-07-30 | 和光純薬工業株式会社 | ボレート系塩基発生剤および該塩基発生剤を含有する塩基反応性組成物 |
JP2016095388A (ja) * | 2014-11-14 | 2016-05-26 | 野村マイクロ・サイエンス株式会社 | レジスト剥離液及びレジスト剥離方法 |
WO2018180256A1 (ja) * | 2017-03-31 | 2018-10-04 | 関東化學株式会社 | 洗浄液組成物 |
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JP5948758B2 (ja) * | 2010-08-31 | 2016-07-06 | 三菱化学株式会社 | 半導体デバイス用基板洗浄液及び洗浄方法 |
CN103242985B (zh) * | 2013-04-03 | 2014-07-30 | 云南北方奥雷德光电科技股份有限公司 | 一种有机发光微型显示器抗反射层清洗工艺 |
KR102427699B1 (ko) * | 2015-04-27 | 2022-08-01 | 삼성전자주식회사 | 포토레지스트 제거용 조성물 및 이를 이용한 반도체 장치의 제조 방법 |
WO2019208686A1 (ja) * | 2018-04-27 | 2019-10-31 | 三菱瓦斯化学株式会社 | 水性組成物及びこれを用いた洗浄方法 |
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Also Published As
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KR20100120236A (ko) | 2010-11-12 |
EP2249206A1 (en) | 2010-11-10 |
EP2249206B1 (en) | 2014-07-02 |
US8828918B2 (en) | 2014-09-09 |
TW200949464A (en) | 2009-12-01 |
JP5375820B2 (ja) | 2013-12-25 |
EP2249206A4 (en) | 2011-11-23 |
IL207988A0 (en) | 2010-12-30 |
TWI460557B (zh) | 2014-11-11 |
CN101960388A (zh) | 2011-01-26 |
SG188872A1 (en) | 2013-04-30 |
US20110021400A1 (en) | 2011-01-27 |
JPWO2009110582A1 (ja) | 2011-07-14 |
CN101960388B (zh) | 2012-11-28 |
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