WO2017169981A1 - レジストパターン被覆用水溶液及びそれを用いたパターン形成方法 - Google Patents
レジストパターン被覆用水溶液及びそれを用いたパターン形成方法 Download PDFInfo
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- WO2017169981A1 WO2017169981A1 PCT/JP2017/011230 JP2017011230W WO2017169981A1 WO 2017169981 A1 WO2017169981 A1 WO 2017169981A1 JP 2017011230 W JP2017011230 W JP 2017011230W WO 2017169981 A1 WO2017169981 A1 WO 2017169981A1
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- resist pattern
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- 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
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2041—Exposure; Apparatus therefor in the presence of a fluid, e.g. immersion; using fluid cooling means
- G03F7/2043—Exposure; Apparatus therefor in the presence of a fluid, e.g. immersion; using fluid cooling means with the production of a chemical active agent from a fluid, e.g. an etching agent; with meterial deposition from the fluid phase, e.g. contamination resists
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- 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
- G03F7/40—Treatment after imagewise removal, e.g. baking
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
- C09D171/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- 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
- G03F7/0035—Multiple processes, e.g. applying a further resist layer on an already in a previously step, processed pattern or textured surface
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- 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
- G03F7/20—Exposure; Apparatus therefor
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- 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
- G03F7/30—Imagewise removal using liquid means
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- 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
- G03F7/40—Treatment after imagewise removal, e.g. baking
- G03F7/405—Treatment with inorganic or organometallic reagents after imagewise removal
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—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
- H01L21/0275—Photolithographic processes using lasers
Definitions
- the present invention relates to an aqueous solution for coating a resist pattern, which can prevent the resist pattern from collapsing and make the resist pattern finer. Furthermore, the present invention relates to a pattern forming method and a reverse pattern forming method using the aqueous solution.
- fine processing by lithography using a resist composition is performed.
- the microfabrication forms a thin film of a photoresist composition on a semiconductor substrate such as a silicon wafer, and irradiates with an actinic ray such as ultraviolet rays through a mask pattern on which a device pattern is drawn, and develops it.
- This is a processing method in which fine irregularities corresponding to the pattern are formed on the substrate surface by etching the substrate using the obtained photoresist pattern as a protective film.
- Patent Documents 1 to 4 a method of applying on a resist pattern and miniaturizing the resist pattern and a coating material used for the method are known (for example, Patent Documents 1 to 4). By adopting this method, it becomes possible to further miniaturize a resist pattern produced by lithography employing exposure using an ArF excimer laser that has already been put into practical use.
- the aqueous solution containing the water-soluble resin described in Patent Document 1 uses water having a higher surface tension as a solvent as compared with an organic solvent, there is a difficulty in application to a resist pattern. Therefore, it is necessary to add a surfactant or use a water-soluble alcohol mixed with water. Since the resist pattern refinement composition described in Patent Document 2 is a solution that does not contain a polymer, the ratio of refinement tends to vary depending on the shape of the resist pattern to be refined.
- the pattern refinement treatment agent described in Patent Document 3 contains an acid generator component, and the baking treatment temperature after applying the pattern refinement treatment agent is 130 ° C. or higher, or A step of exposing after applying the pattern refining treatment agent must be added.
- the method for forming a fine pattern described in Patent Document 4 narrows a resist pattern formed by a negative development process, that is, forms a coating film on the resist pattern, and then heats the resist pattern. It is to reduce the space width which is an interval between them. Therefore, the fine pattern forming method is not intended to reduce the width or diameter of the resist pattern.
- the present invention solves the above-mentioned problems.
- the present invention exhibits good applicability.
- An object of the present invention is to provide a resist pattern coating aqueous solution capable of preventing collapse of a resist pattern by reducing the force.
- Another object of the present invention is to provide an aqueous resist pattern coating solution that can reduce the width of the resist pattern by containing an acidic additive. Furthermore, it aims at providing the formation method of the resist pattern using this aqueous solution, and the formation method of the inversion pattern using this aqueous solution.
- the present inventor can form a finer pattern than the conventional fine pattern forming composition, and can easily control the reduction width of the pattern size.
- water and optionally a specific water-soluble organic solvent such as isopropyl alcohol as a solvent
- other solutions for example, development
- an aqueous solution for coating a resist pattern that can be used in the developing cup because of its excellent compatibility with the liquid and a rinsing liquid containing a surfactant.
- the first aspect of the present invention is a component A: a copolymer having an ethylene oxide unit and an alkylene oxide unit having 3 carbon atoms in the main chain and a hydroxy group at the terminal, B component: a water-soluble polymer (provided that the A component It is a resist pattern coating aqueous solution containing a water-soluble monomer or water-soluble oligomer, and component C: a solvent mainly containing water.
- the copolymer of the component A is, for example, a block copolymer represented by the following formula (1). (Wherein R 1 , R 2 and R 3 each independently represents an ethylene group, a propylene group or a trimethylene group, and x, y and z each independently represents an integer of 5 to 100)
- the copolymer of the component A has a number average molecular weight of, for example, 1000 to 20,000.
- the water-soluble polymer of the component B is, for example, polyvinyl pyrrolidone, polyacrylic acid, polyacrylamide, polyvinyl alcohol, polysaccharide, polyamino acid, polyethyleneimine, or polyethylene glycol having a number average molecular weight of 1000 to 400,000.
- the water-soluble monomer or water-soluble oligomer of the component B is, for example, cyclodextrin or crown ether.
- the C component solvent may contain at least one water-soluble organic solvent selected from the group consisting of alcohols, esters, ethers and ketones.
- the resist pattern coating aqueous solution of the first aspect of the present invention may further contain D component: an organic sulfonic acid represented by the following formula (2).
- R 4 is an alkyl group or fluorinated alkyl group having a linear, branched or cyclic structure having 1 to 16 carbon atoms, or at least 1 having the alkyl group or the fluorinated alkyl group as a substituent.
- the alkyl group having a cyclic structure may have a carbonyl group in the main chain, and the aromatic group may further have a hydroxy group or a carboxyl group as a substituent.
- R 4 is, for example, a phenyl group or a naphthyl group having one linear alkyl group having 10 to 16 carbon atoms as a substituent.
- the content ratio of the organic sulfonic acid of the D component is, for example, 0.01% by mass to 70% by mass with respect to 100% by mass of the sum of the A component and the B component.
- the number average molecular weight of the copolymer of the component A and the number average molecular weight of the water-soluble polymer of the component B are measurement results by gel permeation chromatography.
- the measurement conditions etc. are as follows using the Tosoh Co., Ltd. GPC apparatus for a measurement.
- the resist film formed on the resist underlayer film on the substrate is exposed, baked, developed with a developing solution, and rinsed with a rinsing solution according to a lithographic process.
- a step of coating the resist pattern coating aqueous solution of the first aspect of the present invention so as to cover the resist pattern without drying the resist pattern after the rinsing treatment, and for the resist pattern coating includes a step of heating a substrate coated with an aqueous solution at 50 ° C. to 130 ° C. to form a coating film on the surface of the resist pattern.
- the pattern forming method according to the second aspect of the present invention may include a step of removing the coating film by etching the coating film with an etching gas after forming the coating film and then cooling the substrate. .
- the substrate is cooled, and then the coating film is developed with a developer, and the coating film is developed.
- a step of rinsing the resist pattern with a rinsing liquid may be included.
- the resist pattern formed on the resist underlayer film on the substrate is exposed, baked, developed with a developing solution, and rinsed with a rinsing solution according to a lithography process.
- a reverse pattern forming method including: a step of etching the coating film to expose the upper surface of the resist pattern; and a step of removing the resist pattern from which the upper surface is exposed.
- the reversal pattern forming method further includes a step of rinsing the resist pattern with a rinsing liquid after developing the coating film, and then applying the filling coating liquid without drying the resist pattern.
- a process may be performed.
- the resist pattern coating aqueous solution of the present invention is a resist pattern formed on a substrate by applying a resist film without drying after exposing, developing and rinsing the resist film. It can be uniformly applied on top. Furthermore, after developing and rinsing, by applying the resist pattern coating aqueous solution of the present invention without drying the resist pattern, Laplace force acting between the resist patterns can be prevented, and resist pattern collapse can be prevented. Furthermore, the resist pattern coating aqueous solution of the present invention is used in a general developing cup provided in a coater / developer by using water and optionally a specific water-soluble organic solvent such as isopropyl alcohol as a solvent. Since it has excellent compatibility with other solutions (for example, a developer and a rinse solution containing a surfactant), it can be used in the developer cup.
- the aqueous solution for resist pattern coating of the present invention contains an acidic additive, so that the width of the line pattern can be uniformly reduced in the line and space pattern in which the ratio of the width of the line pattern and the width of the space pattern is different. it can. Furthermore, the reduction ratio of the width or diameter of the resist pattern can be changed by selecting a polymer contained in the resist pattern coating aqueous solution of the present invention. Further, when EUV exposure is put to practical use in the future, it is possible to further miniaturize a resist pattern produced using EUV exposure.
- the component A contained in the aqueous resist pattern coating solution of the present invention is a copolymer having an ethylene oxide unit and an alkylene oxide unit having 3 carbon atoms in the main chain, and a hydroxy group at the terminal.
- copolymers include ADEKA (registered trademark) Pluronic L-23, L-31, L-44, L-61, L-62, L-64, L-71, Same L-72, Same L-101, Same L-121, Same P-84, Same P-85, Same P-103, Same F-68, Same F-88, Same F-108, Same 25R-1, 25R-2, 17R-2, 17R-3, 17R-4 (above, manufactured by ADEKA Corporation).
- the content ratio of the component A contained in the resist pattern coating aqueous solution of the present invention is, for example, 0.05% by mass to 30% by mass, preferably 0.1% by mass to 10% by mass with respect to 100% by mass of the entire aqueous solution. % By mass.
- Component B contained in the aqueous resist pattern coating solution of the present invention is a water-soluble polymer, water-soluble monomer or water-soluble oligomer excluding the copolymer of component A.
- Specific examples of these water-soluble polymers, water-soluble monomers and water-soluble oligomers include the aforementioned compounds.
- the content ratio of the B component contained in the aqueous solution for resist pattern coating of the present invention is, for example, 0.05% by mass to 30% by mass, preferably 0.1% by mass to 10% by mass with respect to 100% by mass of the entire aqueous solution. Which is mass%.
- the C component contained in the resist pattern coating aqueous solution of the present invention is a solvent containing water as a main component.
- the concentration of water in the solvent containing water as a main component is, for example, 51% by mass to 100% by mass, or 80% by mass to 100% by mass.
- the water concentration of 100% by mass means that the solvent containing water as a main component is water.
- the component other than water is at least one water-soluble organic solvent selected from the group consisting of alcohols, esters, ethers, and ketones.
- Examples of the alcohols include alcohols such as ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, n-hexyl alcohol, n-heptyl alcohol, ethylene glycol, propylene glycol, diethylene glycol and the like.
- Examples include glycol solvents and glycol ether solvents such as ethylene glycol monomethyl ether, propylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monoethyl ether, and methoxymethylbutanol.
- esters examples include ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, propylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, 3-methoxy Mention may be made of butyl acetate, 3-methyl-3-methoxybutyl acetate, butyl lactate and propyl lactate.
- ethers examples include di-n-propyl ether, di-n-butyl ether, dioxane, and tetrahydrofuran in addition to the glycol ether solvent.
- ketones examples include 1-octanone, 2-octanone, 1-nonanone, 2-nonanone, 4-heptanone, 1-hexanone, 2-hexanone, diisobutyl ketone, cyclohexanone, methyl ethyl ketone, methyl isobutyl ketone, and acetophenone. be able to.
- the aqueous resist pattern coating solution of the present invention may further contain an organic sulfonic acid represented by the above formula (2) as a D component.
- organic sulfonic acids include octylbenzenesulfonic acid, nonylbenzenesulfonic acid, decylbenzenesulfonic acid, undecylbenzenesulfonic acid, dodecylbenzenesulfonic acid (also known as laurylbenzenesulfonic acid), (1, 3, 5 , 7-tetramethyloctyl) benzenesulfonic acid, tridecylbenzenesulfonic acid, (1R)-( ⁇ )-10-camphorsulfonic acid, (1S)-(+)-10-camphorsulfonic acid, trifluoromethanesulfonic acid, Mention may be made of perfluorobutanesulfonic acid, perfluorooctanesulfonic acid, non
- dodecylbenzenesulfonic acid and nonafluoro-1-butanesulfonic acid are preferably used as the component (D) contained in the resist pattern coating aqueous solution of the present invention.
- the content ratio thereof is, for example, 0.01% by mass to 70% by mass with respect to 100% by mass of the sum of the A component and the B component. Is 0.1% to 50% by weight.
- the aqueous solution for coating a resist pattern of the present invention may further contain various additives such as a surfactant as necessary as long as the effects of the present invention are not impaired.
- the surfactant is an additive for improving the applicability of the aqueous solution to the substrate.
- Known surfactants such as nonionic surfactants and fluorine-based surfactants can be used.
- the surfactant include, for example, polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene cetyl ether, polyoxyethylene alkyl ethers such as polyoxyethylene oleyl ether, and polyoxyethylene octylphenyl ether.
- Polyoxyethylene alkylaryl ethers such as polyoxyethylene nonylphenyl ether, polyoxyethylene / polyoxypropylene block copolymers, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate Sorbitan fatty acid esters such as sorbitan tristearate, polyoxyethylene sorbitan monolaurate, polyoxy Nonionic surfactants such as polyoxyethylene sorbitan fatty acid esters such as tylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan trioleate, polyoxyethylene sorbitan tristearate, Ftop [registered trademark] EF301, EF303, EF352 (Mitsubishi Materials Electronics Chemical Co., Ltd.), MegaFac [registered trademark] F171, F173, R-30, R-40, R-40-LM (DIC Corporation) )),
- the content ratio is, for example, 0.1% by mass to 5% by mass with respect to 100% by mass of the sum of the A component and the B component.
- the content is preferably 0.2% by mass to 3% by mass.
- the pattern forming method and the reverse pattern forming method using the resist pattern coating aqueous solution of the present invention are developed by exposing, baking and developing a resist film formed on a resist underlayer film on a substrate according to a lithography process. And a step of forming a resist pattern by rinsing with a rinsing liquid.
- a substrate used for manufacturing a precision integrated circuit element for example, a semiconductor substrate such as a silicon wafer which may be covered with a silicon oxide film, a silicon nitride film or a silicon oxynitride film, a silicon nitride substrate
- the organic film and / or inorganic film which have antireflection ability are formed as a resist underlayer film.
- a positive resist solution for example, PAR710, PAR855 manufactured by Sumitomo Chemical Co., Ltd., and AR2772JN manufactured by JSR Co., Ltd.
- a negative resist solution may be used.
- a light source of an exposure apparatus used for exposure of the resist film for example, radiation selected from the group consisting of i-line, KrF excimer laser, ArF excimer laser, and EUV can be employed.
- the heating temperature when baking (PEB: Post Exposure Bake) on the resist film after exposure is, for example, 80 ° C. to 140 ° C.
- examples of the developer used in the development process include sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, and aqueous ammonia.
- Inorganic alkalis primary amines such as ethylamine and n-propylamine, secondary amines such as diethylamine and di-n-butylamine, tertiary amines such as triethylamine and methyldiethylamine, dimethylethanolamine and triethanolamine
- alkalis such as alcohol amines, quaternary ammonium salts such as tetramethylammonium hydroxide, tetraethylammonium hydroxide and choline, cyclic amines such as pyrrole and piperidine, and the like.
- an appropriate amount of an alcohol such as isopropyl alcohol or a nonionic surfactant may be added to the alkaline aqueous solution.
- a preferred developer is an aqueous solution of a quaternary ammonium salt, more preferably an aqueous solution of tetramethylammonium hydroxide.
- Examples of the shape of the resist pattern to be formed include a line shape and a pillar shape.
- a linear resist pattern either an isolated line pattern or a line and space pattern may be formed.
- the shape of the linear resist pattern is not limited to a straight line, and may be a bent shape.
- rinsing liquid used for the rinsing treatment examples include an aqueous solution containing a surfactant, pure water, and ultrapure water.
- the pattern forming method and the reverse pattern forming method using the resist pattern coating aqueous solution of the present invention further include a step of applying the resist pattern coating aqueous solution of the present invention so as to cover the resist pattern after the rinsing treatment. Have. In this step, it is important not to dry the resist pattern. This is because when the resist pattern is dried, the resist pattern may fall down.
- the coating film is etched with an etching gas, or when the coating film is developed with a developer, the etching gas may be, for example, O 2 and N 2.
- the etching gas may be, for example, O 2 and N 2.
- Gas, O 2 gas, CF 4 gas, Cl 2 gas, HBr gas, SiF 4 gas, HCl gas, He gas and Ar gas, and the above-mentioned alkaline aqueous solution is applied as the developer. be able to.
- the above-mentioned specific example can be applied as a rinse liquid used for the rinse process after the said development process.
- the reversal pattern forming method using the resist pattern coating aqueous solution of the present invention applies a filling coating solution containing polysiloxane and water and / or a solvent containing alcohols so as to fill between resist pattern patterns.
- a filling coating solution containing polysiloxane and water and / or a solvent containing alcohols so as to fill between resist pattern patterns.
- the process of carrying out As the polysiloxane that is a component of the coating solution for filling, a known material used for the coating solution applied to the resist pattern can be employed.
- the specific example of alcohol which the above-mentioned C component can contain as components other than water is applicable as alcohol.
- the reversal pattern forming method using the aqueous resist pattern coating solution of the present invention further removes or reduces components other than polysiloxane and the developing solution or the rinsing solution contained in the filling coating solution to form a coating film.
- Forming The step is, for example, spin drying the substrate on which the filling coating liquid is applied, or heating after spin drying. Here, the spin dry is to dry while rotating the substrate.
- components other than polysiloxane contained in the coating liquid for filling are polysiloxane, a solvent containing water and / or alcohols, and an additive added as necessary.
- the reverse pattern forming method using the resist pattern coating aqueous solution of the present invention further includes a step of etching back the coating film to expose the upper surface of the resist pattern, and a step of removing the resist pattern from which the upper surface is exposed.
- the etch back is performed, for example, by dry etching using a fluorine-based gas such as CF 4 , wet etching using an aqueous solution of an organic acid or an organic base, wet etching using an organic solvent, or a CMP method, and the processing conditions are appropriately adjusted. Is possible.
- the removal of the resist pattern whose upper surface is exposed is performed by, for example, dry etching using a mixed gas of O 2 and N 2 or O 2 gas.
- Example 1 Polyvinylpyrrolidone K60 (about 35% aqueous solution) (Tokyo Chemical Industry Co., Ltd.) 0.50 g, and polyoxyethylene polyoxypropylene glycol (160E.O.) (30PO) (Wako Pure Chemical Industries, Ltd.) (Made) 0.08 g was added to 49.42 g of pure water and dissolved. Thereafter, the solution was filtered using a microfilter having a pore size of 0.20 ⁇ m (manufactured by GE Healthcare Japan Co., Ltd. (former Whatman)) to prepare an aqueous solution for coating a resist pattern.
- a microfilter having a pore size of 0.20 ⁇ m (manufactured by GE Healthcare Japan Co., Ltd. (former Whatman)) to prepare an aqueous solution for coating a resist pattern.
- Example 2 Polyvinylpyrrolidone K60 (about 35% aqueous solution) (Tokyo Chemical Industry Co., Ltd.) 0.36 g, and polyoxyethylene polyoxypropylene glycol (160E.O.) (30PO) (Wako Pure Chemical Industries, Ltd.) 0.12 g (manufactured) was dissolved in 49.52 g of pure water. Thereafter, the solution was filtered using a microfilter having a pore size of 0.20 ⁇ m (manufactured by GE Healthcare Japan Co., Ltd. (former Whatman)) to prepare an aqueous solution for coating a resist pattern.
- Example 3 Polyvinylpyrrolidone K60 (about 35% aqueous solution) (Tokyo Chemical Industry Co., Ltd.) 0.21 g, and polyoxyethylene polyoxypropylene glycol (160E.O.) (30 PO) (Wako Pure Chemical Industries, Ltd.) 0.18 g (manufactured) was dissolved in 49.61 g of pure water. Thereafter, the solution was filtered using a microfilter having a pore size of 0.20 ⁇ m (manufactured by GE Healthcare Japan Co., Ltd. (former Whatman)) to prepare an aqueous solution for coating a resist pattern.
- Example 4 Polyvinylpyrrolidone K60 (approximately 35% aqueous solution) (Tokyo Chemical Industry Co., Ltd.) 1.48 g, polyoxyethylene polyoxypropylene glycol (160E.O.) (30 PO) (Wako Pure Chemical Industries, Ltd.) 48.29 g of pure water was dissolved in 0.058 g and 0.17 g of dodecylbenzenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.). Thereafter, the solution was filtered using a microfilter having a pore size of 0.20 ⁇ m (manufactured by GE Healthcare Japan Co., Ltd. (former Whatman)) to prepare an aqueous solution for coating a resist pattern.
- a microfilter having a pore size of 0.20 ⁇ m
- Example 5 1.38 g of polyvinylpyrrolidone K60 (approximately 35% aqueous solution) (manufactured by Tokyo Chemical Industry Co., Ltd.), polyoxyethylene polyoxypropylene glycol (160E.O.) (30 PO) (manufactured by Wako Pure Chemical Industries, Ltd.) ) 0.054 g and 0.21 g of dodecylbenzenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) were added to 48.35 g of pure water and dissolved. Thereafter, the solution was filtered using a microfilter having a pore size of 0.20 ⁇ m (manufactured by GE Healthcare Japan Co., Ltd. (former Whatman)) to prepare an aqueous solution for coating a resist pattern.
- a microfilter having a pore size of 0.20 ⁇ m (manufactured by GE Healthcare Japan Co., Ltd. (former Whatman)) to prepare an aqueous
- Example 6 Polyvinylpyrrolidone K60 (about 35% aqueous solution) (Tokyo Chemical Industry Co., Ltd.) 1.71 g, polyoxyethylene polyoxypropylene glycol (160E.O.) (30 P.O.) (Wako Pure Chemical Industries, Ltd.) ) 0.067 g and 0.33 g of dodecylbenzenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) were added to 49.47 g of pure water and dissolved. Thereafter, the solution was filtered using a microfilter having a pore size of 0.20 ⁇ m (manufactured by GE Healthcare Japan Co., Ltd. (former Whatman)) to prepare an aqueous solution for coating a resist pattern.
- a microfilter having a pore size of 0.20 ⁇ m
- ARC registered trademark
- 29A manufactured by Nissan Chemical Industries, Ltd.
- ARC registered trademark
- PAR855 a commercially available photoresist solution
- the photoresist film was exposed through a photomask. It was.
- the photomask is selected according to the resist pattern to be formed.
- post exposure bake (PEB) is performed at 105 ° C. for 60 seconds, and after cooling, 0.26N tetramethylammonium hydroxide aqueous solution as a developer in an industrial standard 60 second single paddle process.
- PEB post exposure bake
- 0.26N tetramethylammonium hydroxide aqueous solution as a developer in an industrial standard 60 second single paddle process.
- pure water was applied and rinsed, and then dried by spin drying.
- the target resist pattern was formed through the above steps. About the formed line and space pattern, the measurement of the width of a line pattern and the presence or absence of pattern collapse were performed.
- the resist pattern coating aqueous solution prepared in Example 2 was applied, followed by baking at 100 ° C. for 60 seconds to form a coating film.
- the LWR is an abbreviation for “Line Width Roughness”.
- Table 2 The results are shown in Table 2 below.
- the width of the resist pattern was increased by 2 nm. It was confirmed that a coating film was formed on the surface.
- the formation of the coating film suppresses the collapse of the resist pattern. was confirmed.
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Abstract
Description
GPCカラム:Shodex〔登録商標〕Asahipak〔登録商標〕(昭和電工(株)製)
カラム温度:40℃
溶媒:N,N-ジメチルホルムアミド(DMF)
流量:0.6mL/分
標準試料: 標準ポリスチレン試料(東ソー(株)製)、標準ポリエチレンオキサイド (PEO)試料(昭和電工(株)製)
ディテクター:RIディテクター(東ソー株式会社製、RI-8020)
本発明のレジストパターン被覆用水溶液に含まれるA成分は、主鎖にエチレンオキシド単位及び炭素原子数3のアルキレンオキシド単位、並びに末端にヒドロキシ基を有する共重合体である。このような共重合体として、例えば、アデカ〔登録商標〕プルロニックL-23、同L-31、同L-44、同L-61、同L-62、同L-64,同L-71、同L-72、同L-101、同L-121、同P-84、同P-85、同P-103、同F-68、同F-88、同F-108、同25R-1、同25R-2、同17R-2、同17R-3、同17R-4(以上、(株)ADEKA製)を挙げることができる。
本発明のレジストパターン被覆用水溶液に含まれるB成分は、前記A成分の共重合体を除く水溶性ポリマー、水溶性モノマー又は水溶性オリゴマーである。これら水溶性ポリマー、水溶性モノマー及び水溶性オリゴマーの具体例として、前述した化合物が挙げられる。
本発明のレジストパターン被覆用水溶液に含まれるC成分は、水を主成分とする溶剤である。水を主成分とする溶剤中の水の濃度は、例えば51質量%乃至100質量%、又は80質量%乃至100質量%である。水の濃度が100質量%とは、前記水を主成分とする溶剤が水から成ることを意味する。該溶剤が水以外の成分を含む場合、該水以外の成分は、アルコール類、エステル類、エーテル類及びケトン類からなる群から選択される少なくとも1種の水溶性有機溶剤である。
本発明のレジストパターン被覆用水溶液は、D成分として前記式(2)で表される有機スルホン酸をさらに含有してもよい。このような有機スルホン酸として、例えば、オクチルベンゼンスルホン酸、ノニルベンゼンスルホン酸、デシルベンゼンスルホン酸、ウンデシルベンゼンスルホン酸、ドデシルベンゼンスルホン酸(別名:ラウリルベンゼンスルホン酸)、(1,3,5,7-テトラメチルオクチル)ベンゼンスルホン酸、トリデシルベンゼンスルホン酸、(1R)-(-)-10-カンファースルホン酸、(1S)-(+)-10-カンファースルホン酸、トリフルオロメタンスルホン酸、パーフルオロブタンスルホン酸、パーフルオロオクタンスルホン酸、ノナフルオロ-1-ブタンスルホン酸、p-トルエンスルホン酸及び1-ナフタレンスルホン酸を挙げることができる。これらの有機スルホン酸のうち、本発明のレジストパターン被覆用水溶液に含まれる(D)成分として、ドデシルベンゼンスルホン酸及びノナフルオロ-1-ブタンスルホン酸が好ましく用いられる。
本発明のレジストパターン被覆用水溶液は、必要に応じて界面活性剤等の各種添加剤を、本発明の効果を損なわない限りにおいてさらに含んでもよい。界面活性剤は、基板に対する該水溶液の塗布性を向上させるための添加物である。ノニオン系界面活性剤、フッ素系界面活性剤のような公知の界面活性剤を用いることができる。
本発明のレジストパターン被覆用水溶液を用いた、パターン形成方法及び反転パターン形成方法は、基板上のレジスト下層膜の上に形成したレジスト膜に対し、リソグラフィープロセスにしたがって露光、ベーク、現像液で現像処理、及びリンス液でリンス処理を行うことによってレジストパターンを形成する工程を有する。ここで、前記基板として、精密集積回路素子の製造に使用される基板(例えば、酸化珪素膜、窒化珪素膜又は酸化窒化珪素膜で被覆されていてもよいシリコンウエハー等の半導体基板、窒化珪素基板、石英基板、無アルカリガラス基板、低アルカリガラス基板、結晶化ガラス基板、ITO膜が形成されたガラス基板)を挙げることができる。そして、前記基板には、レジスト下層膜として、反射防止能を有する有機膜及び/又は無機膜が形成されている。その基板上に形成されたレジスト下層膜上にレジスト膜を形成するために使用するレジスト溶液として、ポジ型レジスト溶液(例えば、住友化学(株)製PAR710、同PAR855、及びJSR(株)製AR2772JN)を用いることができる。前記ポジ型レジスト溶液に替えて、ネガ型レジスト溶液を使用することもできる。
本発明のレジスパターン被覆用水溶液を用いた反転パターン形成方法は、レジストパターンのパターン間を充填するように、ポリシロキサンと水及び/又はアルコール類を含有する溶剤とを含む充填用塗布液を塗布する工程を有する。この充填用塗布液の成分であるポリシロキサンとして、レジストパターンに塗布される塗布液に用いられる公知の材料を採用することができる。また、アルコール類として、前述のC成分が水以外の成分として含有することができるアルコール類の具体例を適用することができる。
ポリビニルピロリドン K60(約35%水溶液)(東京化成工業(株)製)0.50g、及びポリオキシエチレンポリオキシプロピレングリコール(160E.O.)(30P.O.)(和光純薬工業(株)製)0.08gを、純水49.42gに加え溶解させた。その後孔径0.20μmのミクロフィルター(GEヘルスケア・ジャパン(株)(旧ワットマン社)製)を用いてろ過して、レジストパターン被覆用水溶液を調製した。
ポリビニルピロリドン K60(約35%水溶液)(東京化成工業(株)製)0.36g、及びポリオキシエチレンポリオキシプロピレングリコール(160E.O.)(30P.O.)(和光純薬工業(株)製)0.12gを、純水49.52gに加え溶解させた。その後孔径0.20μmのミクロフィルター(GEヘルスケア・ジャパン(株)(旧ワットマン社)製)を用いてろ過して、レジストパターン被覆用水溶液を調製した。
ポリビニルピロリドン K60(約35%水溶液)(東京化成工業(株)製)0.21g、及びポリオキシエチレンポリオキシプロピレングリコール(160E.O.)(30P.O.)(和光純薬工業(株)製)0.18gを、純水49.61gに加え溶解させた。その後孔径0.20μmのミクロフィルター(GEヘルスケア・ジャパン(株)(旧ワットマン社)製)を用いてろ過して、レジストパターン被覆用水溶液を調製した。
ポリビニルピロリドン K60(約35%水溶液)(東京化成工業(株)製)1.48g、ポリオキシエチレンポリオキシプロピレングリコール(160E.O.)(30P.O.)(和光純薬工業(株)製)0.058g、及びドデシルベンゼンスルホン酸(和光純薬工業(株)製)0.17gに純水48.29gを加え溶解させた。その後孔径0.20μmのミクロフィルター(GEヘルスケア・ジャパン(株)(旧ワットマン社)製)を用いてろ過して、レジストパターン被覆用水溶液を調製した。
ポリビニルピロリドン K60(約35%水溶液)(東京化成工業(株)製)1.38g、ポリオキシエチレンポリオキシプロピレングリコール(160E.O.)(30P.O.)(和光純薬工業(株)製)0.054g、及びドデシルベンゼンスルホン酸(和光純薬工業(株)製)0.21gを、純水48.35gに加え溶解させた。その後孔径0.20μmのミクロフィルター(GEヘルスケア・ジャパン(株)(旧ワットマン社)製)を用いてろ過して、レジストパターン被覆用水溶液を調製した。
ポリビニルピロリドン K60(約35%水溶液)(東京化成工業(株)製)1.71g、ポリオキシエチレンポリオキシプロピレングリコール(160E.O.)(30P.O.)(和光純薬工業(株)製)0.067g、及びドデシルベンゼンスルホン酸(和光純薬工業(株)製)0.33gを、純水49.47gに加え溶解させた。その後孔径0.20μmのミクロフィルター(GEヘルスケア・ジャパン(株)(旧ワットマン社)製)を用いてろ過して、レジストパターン被覆用水溶液を調製した。
ポリビニルピロリドン K60(約35%水溶液)(東京化成工業(株)製)0.2gを、純水49.0gに加え溶解させた。その後孔径0.20μmのミクロフィルター(GEヘルスケア・ジャパン(株)(旧ワットマン社)製)を用いてろ過して、レジストパターン被覆用水溶液を調製した。
ポリオキシエチレンポリオキシプロピレングリコール(160E.O.)(30P.O.)(和光純薬工業(株)製)0.5gを、純水45.0gに加え溶解させた。その後孔径0.20μmのミクロフィルター(GEヘルスケア・ジャパン(株)(旧ワットマン社)製)を用いてろ過して、レジストパターン被覆用水溶液を調製した。
実施例1乃至実施例3、比較例1及び比較例2で調製したレジストパターン被覆用水溶液に純水をさらに加えて、スピンコーター(1500rpm、60秒間)にて10nmの膜厚になるようにシリコンウエハー上に塗布し、そのシリコンウエハーを100℃で60秒間ベークした。その後、前記シリコンウエハー上の塗膜を確認することで、各レジストパターン被覆用水溶液の該シリコンウエハー上への塗布性を評価した。その結果を下記表1に示す。
ARC〔登録商標〕29A(日産化学工業(株)製)をスピナーによりシリコンウエハー上に塗布した。そのシリコンウエハーをホットプレート上に配置し、205℃で1分間加熱し、膜厚80nmのレジスト下層膜を形成した。このレジスト下層膜の上に、市販のフォトレジスト溶液(住友化学(株)製、商品名:PAR855)をスピナーにより塗布し、ホットプレート上で105℃にて60秒間加熱してフォトレジスト膜(膜厚0.10μm)を形成した。
ヘキサメチルジシラザン(HMDS)を用いて120℃で60秒間処理をしたシリコンウエハー上に、EUVレジストを30nmの膜厚になるように塗布し、ベークした。その後、(株)エリオニクス製の電子線描画機を用いて、ラインアンドスペースパターンが描画されたレジスト膜を有するシリコンウエハーを作製した。さらに作製したシリコンウエハーをチップ状にカットし、現像液として0.26規定のテトラメチルアンモニウムヒドロキシド水溶液を用いて現像した。その後、現像液を除去するため純水を塗布し、リンスした後、ホットプレートにて100℃で30秒間乾燥させ、リファレンスとなるラインアンドスペース1:1のパターンを得た。さらに上記作製手順にしたがって作製した、チップ状にカットしたシリコンウエハーを、上記現像液を用いて現像した。その後、現像液を除去するため純水でリンスした後、実施例4乃至実施例6で調製したレジストパターン被覆用水溶液をそれぞれ、現像及びリンス処理を経た乾燥させる前のレジストパターン上に塗布し、80℃で60秒間ベークし被覆膜を形成した。さらに前記被覆膜を現像液で現像し、前記被覆膜を現像液で現像した後のレジストパターンを、リンス液でリンス処理し、100℃で30秒間乾燥させた後それぞれ、トリミングされたラインパターンの幅を測長した。その結果を、下記表3に示す。表3の結果から、実施例4乃至実施例6のレジストパターン被覆用水溶液を用いて被覆膜を形成後、現像、リンス処理及び乾燥させて得られたパターンは、リファレンスのパターンと比較して、ラインパターン幅が5nm以上縮小したことが確認できた。
Claims (13)
- A成分:主鎖にエチレンオキシド単位及び炭素原子数3のアルキレンオキシド単位、並びに末端にヒドロキシ基を有する共重合体、
B成分:水溶性ポリマー(但し、前記A成分の共重合体を除く)、水溶性モノマー又は水溶性オリゴマー、及び
C成分:水を主成分とする溶剤
を含むレジストパターン被覆用水溶液。 - 前記A成分の共重合体は1000乃至20,000の数平均分子量を有する、請求項1又は請求項2に記載のレジストパターン被覆用水溶液。
- 前記B成分の水溶性ポリマーは、1000乃至400,000の数平均分子量を有しかつポリビニルピロリドン、ポリアクリル酸、ポリアクリルアミド、ポリビニルアルコール、多糖類、ポリアミノ酸、ポリエチレンイミン又はポリエチレングリコールであり、前記B成分の水溶性モノマー又は水溶性オリゴマーは、シクロデキストリン又はクラウンエーテルである、請求項1乃至請求項3のいずれか一項に記載のレジストパターン被覆用水溶液。
- 前記C成分の溶剤は、アルコール類、エステル類、エーテル類及びケトン類からなる群から選択される少なくとも1種の水溶性有機溶剤を含む、請求項1乃至請求項4のいずれか一項に記載のレジストパターン被覆用水溶液。
- 前記式(2)においてR4は炭素原子数10乃至16の直鎖状アルキル基を置換基として1つ有するフェニル基又はナフチル基である、請求項6に記載のレジストパターン被覆用水溶液。
- 前記D成分の有機スルホン酸の含有割合は、前記A成分及び前記B成分の和100質量%に対して0.01質量%乃至70質量%である、請求項6又は請求項7に記載のレジストパターン被覆用水溶液。
- 基板上のレジスト下層膜の上に形成したレジスト膜に対し、リソグラフィープロセスにしたがって露光、ベーク、現像液で現像処理、及びリンス液でリンス処理を行うことによってレジストパターンを形成する工程、
前記リンス処理後、前記レジストパターンを乾燥させることなく、該レジストパターンを被覆するように請求項1乃至請求項8のいずれか一項に記載のレジストパターン被覆用水溶液を塗布する工程、及び
前記レジストパターン被覆用水溶液が塗布された基板を50℃乃至130℃で加熱して前記レジストパターンの表面に被覆膜を形成する工程
を含むパターン形成方法。 - 前記被覆膜の形成後、前記基板を冷却したのち該被覆膜をエッチングガスでエッチングすることによって該被覆膜を除去する工程を含む、請求項9に記載のパターン形成方法。
- 前記被覆膜の形成後、前記基板を冷却したのち該被覆膜に対し現像液で現像処理する工程、及び
前記被覆膜に対する現像処理後、前記レジストパターンをリンス液でリンス処理する工程
を含む、請求項9に記載のパターン形成方法。 - 基板上のレジスト下層膜の上に形成したレジスト膜に対し、リソグラフィープロセスにしたがって露光、ベーク、現像液で現像処理、及びリンス液でリンス処理を行うことによってレジストパターンを形成する工程、
前記リンス処理後、前記レジストパターンを乾燥させることなく、該レジストパターンを被覆するように請求項1乃至請求項8のいずれか一項に記載のレジストパターン被覆用水溶液を塗布する工程、
前記レジストパターン被覆用水溶液が塗布された基板を50℃乃至130℃で加熱して前記レジストパターンの表面に被覆膜を形成する工程、
前記被覆膜の形成後、前記基板を冷却したのち該被覆膜に対し現像液で現像処理する工程、
前記被覆膜に対する現像処理後、前記レジストパターンのパターン間を充填するように、ポリシロキサンと水及び/又はアルコール類を含有する溶剤とを含む充填用塗布液を塗布する工程、
前記充填用塗布液に含まれるポリシロキサン以外の成分及び前記現像液を除去し又は減少させて塗膜を形成する工程、
前記塗膜をエッチバックして前記レジストパターンの上面を露出させる工程、及び
上面が露出した前記レジストパターンを除去する工程
を含む反転パターン形成方法。 - 基板上のレジスト下層膜の上に形成したレジスト膜に対し、リソグラフィープロセスにしたがって露光、ベーク、及び現像液で現像処理を行うことによってレジストパターンを形成する工程、
前記レジストパターンを被覆するように請求項1乃至請求項8のいずれか一項に記載のレジストパターン被覆用水溶液を塗布する工程、
前記レジストパターン被覆用水溶液が塗布された基板を50℃乃至130℃で加熱して前記レジストパターンの表面に被覆膜を形成する工程、
前記被覆膜の形成後、前記基板を冷却したのち該被覆膜に対し現像液で現像処理する工程、
前記被覆膜に対する現像処理後、前記レジストパターンをリンス液でリンス処理する工程、
前記リンス処理後、前記レジストパターンを乾燥させることなく、該レジストパターンのパターン間を充填するように、ポリシロキサンと水及び/又はアルコール類を含有する溶剤とを含む充填用塗布液を塗布する工程、
前記充填用塗布液に含まれるポリシロキサン以外の成分及び前記リンス液を除去し又は減少させて塗膜を形成する工程、
前記塗膜をエッチバックして前記レジストパターンの上面を露出させる工程、及び
上面が露出した前記レジストパターンを除去する工程
を含む反転パターン形成方法。
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US16/088,377 US11009795B2 (en) | 2016-03-30 | 2017-03-21 | Aqueous solution for resist pattern coating and pattern forming methods using the same |
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