WO2015115128A1 - ナノインプリント用光硬化性組成物、及びそれを使用した微細パターンの形成方法 - Google Patents
ナノインプリント用光硬化性組成物、及びそれを使用した微細パターンの形成方法 Download PDFInfo
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- WO2015115128A1 WO2015115128A1 PCT/JP2015/050132 JP2015050132W WO2015115128A1 WO 2015115128 A1 WO2015115128 A1 WO 2015115128A1 JP 2015050132 W JP2015050132 W JP 2015050132W WO 2015115128 A1 WO2015115128 A1 WO 2015115128A1
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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
- G03F7/0002—Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
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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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/68—Preparation processes not covered by groups G03F1/20 - G03F1/50
- G03F1/80—Etching
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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
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
- G03F7/0007—Filters, e.g. additive colour filters; Components for display devices
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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
- G03F7/004—Photosensitive materials
- G03F7/0048—Photosensitive materials characterised by the solvents or agents facilitating spreading, e.g. tensio-active agents
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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
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
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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
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
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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
- G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
- G03F7/2012—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image using liquid photohardening compositions, e.g. for the production of reliefs such as flexographic plates or stamps
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/011—Manufacture or treatment of bodies, e.g. forming semiconductor layers
- H10H20/013—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials
- H10H20/0137—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials the light-emitting regions comprising nitride materials
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/819—Bodies characterised by their shape, e.g. curved or truncated substrates
Definitions
- the present invention relates to lithography using active rays such as deep ultraviolet rays, electron beams, ion beams, and X-rays in semiconductor processes, insulating films provided on electronic components such as liquid crystal display elements, integrated circuit elements, and solid-state imaging elements, and protection.
- active rays such as deep ultraviolet rays, electron beams, ion beams, and X-rays
- insulating films provided on electronic components such as liquid crystal display elements, integrated circuit elements, and solid-state imaging elements, and protection.
- Forms radiation sensitive resins and liquid crystal display materials photo spacers for liquid crystal displays, rib forming materials for liquid crystal displays, overcoats, color resists for forming color filters, TFT insulating films, etc.
- the present invention relates to a photocurable composition for nanoimprints used as a liquid crystal resist material, a paint, a coating agent, an adhesive, and the like, and a method for forming a fine pattern using the same.
- a light emitting diode is excellent in energy conversion efficiency and has a long life, so that it is often used in electronic devices and the like.
- the LED has a structure in which a light emitting layer made of a GaN-based semiconductor is laminated on an inorganic material substrate.
- a light emitting layer made of a GaN-based semiconductor is laminated on an inorganic material substrate.
- the inorganic material substrate since there is a large refractive index difference between the inorganic material substrate, the GaN-based semiconductor, and the atmosphere, most of the total amount of light generated in the light emitting layer disappears due to repeated internal reflection, resulting in poor light extraction efficiency. That was the problem.
- a method for solving the above problem a method is known in which a fine pattern of about several ⁇ m is formed on the surface of an inorganic material substrate, and a light emitting layer made of a GaN-based semiconductor is laminated thereon.
- a mask is formed on an inorganic material substrate by photolithography, and the pattern is formed by etching using the obtained mask.
- the increase in size and nanopatterning of inorganic material substrates has been a problem, and the associated increase in cost and processing time has become a problem. Therefore, a method of forming a mask by nanoimprinting instead of the photolithography has attracted attention.
- a photocurable composition used for nanoimprint for example, it is known to use a radical polymerizable compound such as vinyl ether having an alicyclic structure or vinyl ether having an alicyclic structure and an aromatic ring structure.
- a radical polymerizable compound such as vinyl ether having an alicyclic structure or vinyl ether having an alicyclic structure and an aromatic ring structure.
- the radical polymerizable compound has a large cure shrinkage, and it has been difficult to accurately produce a fine pattern.
- the photocurable composition is required to quickly cure and form a thin film after coating on the substrate, but the radically polymerizable compound is subjected to polymerization inhibition by oxygen, and the curing rate decreases.
- a method of curing in an atmosphere of inert gas such as nitrogen may be considered, but the equipment is large and the work efficiency decreases because it takes time to replace the air. There was a problem.
- ether solvents As the solvent used for the photocurable composition used for nanoimprinting, ether solvents, ester solvents, ketone solvents, amide solvents, hydrocarbon solvents and the like are usually used. With these solvents, it is difficult to control the volatilization rate of the solvent when forming a thin film such as spin coat, and the resin is biased when left for a certain period of time, making it difficult to maintain a uniform film thickness.
- an object of the present invention is to accurately transfer and form a fine pattern of a mold while maintaining a uniform film thickness without causing the resin to be biased even if the film is left for a certain period of time after a uniform thin film is produced on the wafer.
- the object is to provide a photocurable composition for nanoimprinting.
- Another object of the present invention is to provide a method for producing a fine pattern substrate using the photocurable composition for nanoimprint.
- Still another object of the present invention is to provide a fine pattern substrate obtained by the method for producing a fine pattern substrate, and a semiconductor device including the same.
- the present inventors have used a general-purpose solvent and a specific alcohol solvent in a composition containing a specific cation curable compound, so that the resin is uniform without unevenness. Have found a photocurable composition for nanoimprinting capable of maintaining a satisfactory film thickness.
- the present invention comprises the following component (A), component (B), component (C) and component (D), wherein the component (C) is 1 to 30 relative to the total amount (100% by weight) of the photocurable composition.
- a photocurable composition for nanoimprinting which is characterized by weight percent.
- Component (A) Cationic curable compound represented by the following formula (1)
- R 1 to R 18 are the same or different and each represents a hydrogen atom, a halogen atom, an oxygen atom, a hydrocarbon group which may contain a halogen atom, or an alkoxy which may have a substituent. Indicates a group.
- X represents a single bond or a linking group
- the present invention further provides a photocurable composition for nanoimprinting comprising a compound containing an aromatic ring and / or an alicyclic ring and a cationic curable functional group (excluding the compound corresponding to the component (A)). provide.
- the present invention further provides a photocurable composition for nanoimprint, which further comprises a silicone-based surface conditioner or a hydrocarbon-based surface conditioner.
- the present invention provides a method for producing a fine pattern substrate in which an inorganic material substrate is etched using a mask obtained by imprinting the photocurable composition for nanoimprint.
- the present invention provides a fine pattern substrate obtained by the method for producing a fine pattern substrate.
- the present invention provides a semiconductor device comprising the fine pattern substrate.
- the present invention relates to the following.
- the component (A), the component (B), the component (C) and the component (D) are included, and the component (C) is 1 to 30% by weight with respect to the total amount (100% by weight) of the photocurable composition % Photocurable composition for nanoimprint,
- the component (C) is 1 to 30% by weight with respect to the total amount (100% by weight) of the photocurable composition % Photocurable composition for nanoimprint
- Photocurable composition for nanoimprint [2]
- a photocurable composition for nanoimprint The content described in any one of [1] to [7] above, wherein the content of the component (A) is 5 to 40% by weight with respect to the total amount (100% by weight) of the photocurable composition.
- a photocurable composition for nanoimprint The photocationic polymerization initiator as the component (B) is a diazonium salt compound, an iodonium salt compound, a sulfonium salt compound, a phosphonium salt compound, a selenium salt compound, an oxonium salt compound, or an ammonium salt compound.
- the photocurable composition for nanoimprints according to any one of the above [1] to [8], which is at least one compound selected from a compound and a bromine salt compound.
- the content (use amount) of the silicone-based surface conditioner or hydrocarbon-based surface conditioner is 0.01 to 1.0% by weight with respect to the total amount (100% by weight) of the photocurable composition.
- a semiconductor device comprising the fine pattern substrate according to [18].
- the photocurable composition for nanoimprints of the present invention has the above-described configuration, after the production of a uniform thin film on a wafer, the resin is not biased even if the resin is left for a certain period of time, while maintaining a uniform film thickness. A fine pattern can be transferred and formed with high accuracy. Therefore, if the photocurable composition for nanoimprinting of the present invention is used, a fine pattern of the mold can be accurately transferred, and a substrate having a fine pattern can be obtained efficiently.
- the photocurable composition for nanoimprinting of the present invention comprises the following component (A), component (B), component (C) and component (D), wherein the component (C) is the total amount of photocurable composition (100 wt. %) And is a photocurable composition for nanoimprinting in an amount of 1 to 30% by weight.
- Component (A) Cationic curable compound represented by the following formula (1)
- R 1 to R 18 are the same or different and each represents a hydrogen atom, a halogen atom, an oxygen atom, a hydrocarbon group which may contain a halogen atom, or an alkoxy which may have a substituent. Indicates a group.
- X represents a single bond or a linking group
- the component (A) of the present invention is a compound having cationic curability represented by the following formula (1).
- R 1 to R 18 are the same or different and each represents a hydrogen atom, a halogen atom, an oxygen atom, a hydrocarbon group which may contain a halogen atom, or an alkoxy which may have a substituent. Indicates a group.
- X represents a single bond or a linking group
- Examples of the halogen atom in R 1 to R 18 include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- Examples of the hydrocarbon group in R 1 to R 18 include an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, an aromatic hydrocarbon group, and a group in which two or more of these are bonded.
- Examples of the aliphatic hydrocarbon group include a C 1-20 alkyl group (preferably a C 1-10 alkyl group, particularly a methyl, ethyl, propyl, isopropyl, butyl, hexyl, octyl, isooctyl, decyl, dodecyl group).
- a C 1-4 alkyl group vinyl, allyl, methallyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl C 2-20 alkenyl group such as 5-hexenyl group (preferably C 2-10 alkenyl group, particularly preferably C 2-4 alkenyl group); C 2-20 alkynyl group such as ethynyl, propynyl group (preferably C 2-10 alkynyl group, particularly preferably C 2-4 alkynyl group).
- Examples of the alicyclic hydrocarbon group include C 3-12 cycloalkyl groups such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cyclododecyl groups; C 3-12 cycloalkenyl groups such as cyclohexenyl groups; and bicycloheptanyl. And a C 4-15 bridged cyclic hydrocarbon group such as a bicycloheptenyl group.
- aromatic hydrocarbon group examples include C 6-14 aryl groups (preferably C 6-10 aryl groups) such as phenyl and naphthyl groups.
- hydrocarbon group optionally containing an oxygen atom or a halogen atom in R 1 to R 18, at least one hydrogen atom in the above hydrocarbon group is substituted with a group having an oxygen atom or a group having a halogen atom.
- group having an oxygen atom include hydroxyl group; hydroperoxy group; C 1-10 alkoxy group such as methoxy, ethoxy, propoxy, isopropyloxy, butoxy, isobutyloxy group; C 2-10 such as allyloxy group.
- R 1 to R 18 are preferably hydrogen atoms.
- Examples of the linking group for X include a divalent hydrocarbon group, a carbonyl group, an ether bond, an ester bond, a carbonate group, an amide group, and a group in which a plurality of these are linked.
- Examples of the divalent hydrocarbon group include a linear or branched alkylene group having 1 to 18 carbon atoms and a divalent alicyclic hydrocarbon group.
- Examples of the linear or branched alkylene group having 1 to 18 carbon atoms include a methylene group, a methylmethylene group, a dimethylmethylene group, an ethylene group, a propylene group, and a trimethylene group.
- divalent alicyclic hydrocarbon group examples include 1,2-cyclopentylene group, 1,3-cyclopentylene group, cyclopentylidene group, 1,2-cyclohexylene group, 1,3-cyclopentylene group, And divalent cycloalkylene groups (including cycloalkene groups) such as cyclohexylene group, 1,4-cyclohexylene group and cyclohexylene group.
- Typical examples of the alicyclic epoxy compound represented by the formula (1) include compounds represented by the following formulas (1-1) to (1-10).
- R 19 in the following formula (1-5) is an alkylene group having 1 to 8 carbon atoms, and includes a methylene group, an ethylene group, a propylene group, an isopropylene group, a butylene group, an isobutylene group, an s-butylene group, a pentylene group, Examples thereof include linear or branched alkylene groups such as a hexylene group, a heptylene group, and an octylene group.
- linear or branched alkylene groups having 1 to 3 carbon atoms such as a methylene group, an ethylene group, a propylene group, and an isopropylene group are preferable.
- N1 to n6 in the following formulas (1-9) and (1-10) each represents an integer of 1 to 30.
- X in the formula (1) is a single bond
- 3,4,3 ′, 4′-diepoxy bicyclohexyl
- Examples of the compound in which X in the formula (1) is a linking group include a compound represented by the formula (1-1), 3,4-epoxycyclohexylmethyl (3,4-epoxy) cyclohexanecarboxylate (for example, A product name “Celoxide 2021P” manufactured by Daicel) is preferable.
- These components (A) can be used alone or in combination of two or more.
- the photocurable composition of the present invention is excellent in thin film curability, shape stability, and uniformity of film thickness on the resin surface by including the component (A).
- the content of component (A) is not particularly limited, but is preferably 5 to 40% by weight, more preferably 10 to 30% by weight, more preferably 10 to 20% by weight based on the total amount of the photocurable composition (100% by weight). % Is more preferable. When the content is 5 to 40% by weight, the thin film curability, the shape stability, and the uniformity of the film thickness on the resin surface are excellent.
- the content of component (A) with respect to the total amount (100% by weight) of the compound having cationic curability is not particularly limited, but is preferably 20 to 90% by weight, more preferably 30 to 80% by weight, and more preferably 30 to 60% by weight. Further preferred.
- the photocurable composition of the present invention may have other cationic curable compounds.
- the other cationic curable compound include compounds containing a cationic curable functional group containing an aromatic ring and / or an alicyclic ring.
- a compound containing a cationic curable functional group containing an aromatic ring and / or an alicyclic ring can be copolymerized with the component (A) as necessary.
- Examples of the aromatic ring include a benzene ring, a naphthalene ring, a fluorene ring, and the like, and an aromatic ring in which two or more of these are bonded through a single bond or a linking group.
- Examples of the alicyclic ring include a cycloalkane ring such as a cyclohexane ring and a cycloheptane ring, and a polycycle (bridged ring) such as a dicyclopentadiene ring.
- Examples of the cationically curable functional group include cyclic ether groups such as oxetanyl group and epoxy group, and electron donating groups such as vinyl ether group. These groups can be used alone or in combination of two or more.
- Examples of the compound containing a cationic curable functional group containing an aromatic ring and / or an alicyclic ring include cyclic ether compounds such as oxetane compounds and epoxy compounds.
- the oxetane compound is not particularly limited as long as it is a compound having an oxetanyl group as a cationic curable functional group, and a liquid or a solid can be used.
- oxetane compound examples include, for example, 3,3-bis (vinyloxymethyl) oxetane, 3-ethyl-3-hydroxymethyloxetane, 3-ethyl-3- (2-ethylhexyloxymethyl) oxetane, 3- Ethyl-3- (hydroxymethyl) oxetane, 3-ethyl-3-[(phenoxy) methyl] oxetane, 3-ethyl-3- (hexyloxymethyl) oxetane, 3-ethyl-3- (chloromethyl) oxetane, 3 , 3-bis (chloromethyl) oxetane, 1,4-bis [(3-ethyl-3-oxetanylmethoxy) methyl] benzene, bis ([1-ethyl (3-oxetanyl)] methyl) ether, 4,4 ′ -Bis [(3-e)
- OXBP oxetane compound having a biphenyl skeleton
- the epoxy compound is not particularly limited as long as it is a compound having an epoxy group (particularly a glycidyl ether group) as a cationically curable functional group, and a liquid or a solid can be used.
- the epoxy compound include an alicyclic epoxy resin excluding the compound represented by the formula (1), a bisphenol A type epoxy resin, a bisphenol F type epoxy resin, a bisphenol S type epoxy resin, and a biphenyl type epoxy resin having a biphenyl skeleton.
- Naphthalene type epoxy resin fluorene type epoxy resin, dicyclopentadiene type epoxy resin having dicyclopentadiene skeleton, phenol novolac type epoxy resin, cresol novolac type epoxy resin, modified novolak type epoxy resin, triphenylmethane type epoxy resin, etc. included. These epoxy compounds can be used individually or in combination of 2 or more types.
- modified novolak type epoxy resin alicyclic epoxy resin, naphthalene type epoxy resin, fluorene type epoxy resin, dicyclopentadiene type epoxy resin, biphenyl type epoxy resin are preferred in terms of heat resistance, moisture absorption resistance and chemical resistance. preferable.
- epoxy compound commercially available products can be used.
- a modified novolak type epoxy resin a trade name “EPICLON N-890” (manufactured by DIC Corporation)
- a dicyclopentadiene type epoxy resin a commercial product can be used.
- EPICLON HP-7200 manufactured by DIC Corporation
- product name “EPICLON HP-4032” manufactured by DIC Corporation
- product name “Ogsol PG” The trade name “YX4000” (manufactured by Mitsubishi Chemical Corporation) can be used as “ ⁇ 100” (manufactured by Osaka Gas Chemical Co., Ltd.) and biphenyl type epoxy resin.
- the molecular weight of the compound containing a cationic curable functional group containing an aromatic ring and / or alicyclic ring is not particularly limited, but a compound having a number average molecular weight of 300 to 800 can improve shape transferability. This is preferable.
- the content of the compound containing a cationic curable functional group containing an aromatic ring and / or alicyclic ring is not particularly limited, but is 5 to 60% by weight based on the total amount of the photocurable composition (100% by weight). It is preferably 10 to 60% by weight, more preferably 30 to 60% by weight. When the content is 5 to 60% by weight, shape transferability can be improved.
- the photocationic polymerization initiator which is the component (B) of the present invention is a compound that generates an acid upon irradiation with light and initiates a curing reaction of the cationically polymerizable compound contained in the photocurable composition for nanoimprinting by the generated acid.
- Photo acid generator which comprises a cation moiety that absorbs light and an anion moiety that is a source of acid generation.
- photocationic polymerization initiator of the present invention examples include diazonium salt compounds, iodonium salt compounds, sulfonium salt compounds, phosphonium salt compounds, selenium salt compounds, oxonium salt compounds, ammonium salt compounds, bromine salts. System compounds and the like. These photocationic polymerization initiators can be used alone or in combination of two or more.
- a sulfonium salt compound is preferable in that a cured product having excellent curability can be formed.
- the cation moiety of the sulfonium salt compound include arylsulfonium ions such as triphenylsulfonium ion, diphenyl [4- (phenylthio) phenyl] sulfonium ion, and tri-p-trisulfonium ion.
- anionic part of the photocationic polymerization initiator examples include BF 4 ⁇ , B (C 6 F 5 ) 4 ⁇ , PF 6 ⁇ , [(Rf) n PF 6 ⁇ n ] ⁇ (Rf: 80 hydrogen atoms) %, An alkyl group substituted with at least fluorine atoms, n is an integer of 1 to 5), AsF 6 ⁇ , SbF 6 ⁇ , pentafluorohydroxyantimonate and the like.
- Examples of the photocationic polymerization initiator of the present invention include diphenyl [4- (phenylthio) phenyl] sulfonium tetrakis (pentafluorophenyl) borate, diphenyl [4- (phenylthio) phenyl] sulfonium hexafluorophosphate, diphenyl [4- ( Phenylthio) phenyl] sulfonium tris (pentafluoroethyl) trifluorophosphate, (1,1′-biphenyl) -4-yl [4- (1,1′-biphenyl) 4-ylthiophenyl] phenyltetrakis (pentafluorophenyl) ) Borate and the like.
- [4- (4-biphenylylthio) phenyl] -4-biphenylylphenylsulfonium tris (pentafluoroethyl) trifluorophosphate which is an initiator containing a fluoroalkylfluorophosphate anion, is preferred.
- the content of the component (B) is not particularly limited, but is preferably 0.1 to 2.0% by weight, and preferably 0.1 to 1.0% by weight with respect to the total amount (100% by weight) of the photocurable composition. More preferred is 0.2 to 1.0% by weight. When the content is from 0.1 to 2.0% by weight, good thin film curability and storage stability of the photocurable composition for nanoimprinting can be obtained.
- the content of component (B) with respect to the total amount (100 parts by weight) of the cationic curable compound is not particularly limited, but is preferably 0.5 to 5.0 parts by weight, more preferably 1.0 to 4.0 parts by weight. 1.0 to 3.0 parts by weight is more preferable.
- the component (C) of the present invention is not particularly limited as long as it is a solvent containing a hydroxyl group and having a boiling point of 100 ° C. to 210 ° C. (760 mmHg).
- the boiling point is preferably 110 to 180 ° C, more preferably 120 to 170 ° C, and further preferably 130 to 160 ° C.
- a component (C) shall be contained in the photocurable composition of this invention.
- the component (C) 3-methoxybutanol (MB, boiling point: 161 ° C.) and methoxypropanol (MMPG, boiling point: 121 ° C.) are preferable because the volatilization rate of the solvent can be easily controlled.
- the photocurable composition of the present invention contains the component (C) as a solvent, the volatilization rate of the solvent can be controlled and local volatilization can be prevented, so that the film thickness can be made uniform. Moreover, the curability of cationic curing can be adjusted by the alcohol component, and even when a silicon mold (nano stamper) is used, swelling into the mold can be suppressed.
- the content of component (C) is 1 to 30% by weight, preferably 3 to 25% by weight, more preferably 5 to 20% by weight, based on the total amount (100% by weight) of the photocurable composition of the present invention. preferable. Since the content is 1 to 30% by weight, the volatilization rate of the solvent can be controlled and local volatilization can be prevented.
- the component (D) of the present invention is not particularly limited as long as it is a solvent that does not contain a hydroxyl group and has a boiling point of 140 ° C. to 210 ° C. (760 mmHg).
- the boiling point is preferably 145 to 195 ° C, more preferably 147 to 190 ° C, and further preferably 150 to 180 ° C.
- a component (D) shall be contained in the photocurable composition of this invention.
- the solvent having monomer solubility of the present invention is a solvent having monomer solubility having a solubility parameter of 8.0 to 10.0 (cal / cm 3 ) 1/2 .
- the solubility parameter is preferably 8.0 to 9.5 (cal / cm 3 ) 1/2, and more preferably 8.0 to 9.0 (cal / cm 3 ) 1/2 .
- solubility parameter is calculated by the method described in the following document proposed by Fedors et al. Pp.147-154 of "POLYMER ENGINEERING ANDSCIENCE, FEBRUARY, 1974, Vol.14, No.2, ROBERT F.FEDORS". Those having close solubility parameters are easy to mix with each other (highly dispersible), and those having a distant numerical value are indicators that are difficult to mix.
- the above solubility parameters are all values at 25 ° C.
- Examples of the component (D) include propylene glycol monoalkyl ether acetates such as propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monobutyl ether acetate; propylene glycol dimethyl ether, propylene glycol diethyl ether, propylene glycol methyl ethyl Propylene glycol dialkyl ethers such as ether and propylene glycol methyl propyl ether; Dipropylene glycol dialkyl ethers such as dipropylene glycol methyl propyl ether, dipropylene glycol dimethyl ether and dipropylene glycol diethyl ether; Propylene glycol diacetate, 1,3- Butyreng Diacetates such as coal diacetate; Other acetates such as cyclohexanol acetate, 3-methoxybutyl acetate and 1-methoxy-2-propyl acetate; Ke
- the photocurable composition of the present invention contains the component (D) together with the component (C) as a solvent, so that the cationic curable compound can be appropriately dissolved, and the volatilization rate of the solvent can be controlled. Therefore, a thin film having a uniform film thickness can be formed.
- the content of component (D) is not particularly limited, but is preferably 20 to 90% by weight, more preferably 30 to 80% by weight, and more preferably 40 to 70% by weight with respect to the total amount (100% by weight) of the photocurable composition. % Is more preferable. When the content is 20 to 90% by weight, the cationic curable compound can be sufficiently dissolved.
- the ratio of component (C) to component (D) is not particularly limited, but the weight ratio of component (C): component (D) is preferably 3:95 to 40:60, and 10:90 to 30 : 70 is more preferable.
- the component (C) is in the above proportion, the cationic curable compound can be sufficiently dissolved, and the volatilization rate of the solvent can be controlled.
- the photocurable composition of the present invention is not particularly limited, but a surface conditioner can be added as necessary.
- the surface conditioner of the present invention is a compound that changes the surface tension of the resin surface and improves wettability, leveling properties, slip properties, defoaming properties and the like (particularly wettability and leveling properties).
- the surface conditioner is not particularly limited, and specific examples include silicone compounds, hydrocarbon compounds, fluorine compounds, vinyl compounds, and the like. These surface conditioners can be used alone or in combination of two or more.
- silicone compound examples include polydimethylsiloxane and modified polydimethylsiloxane obtained by modifying it.
- modified polydimethylsiloxane examples include a polydimethylsiloxane polyether-modified product (for example, a polymer having a structure in which part or all of the methyl group of polydimethylsiloxane is substituted with a polyether (for example, polyoxyalkylene)).
- alkyl-modified products for example, polymers having a structure in which part or all of the methyl groups of polydimethylsiloxane are substituted with alkyl groups having 2 or more carbon atoms
- polyester-modified products for example, polydimethylsiloxane Polymers having a structure in which part or all of the methyl groups are substituted with polyesters (for example, aliphatic polyesters, alicyclic polyesters, aromatic polyesters, etc.), aralkyl modified products (for example, methyl groups of polydimethylsiloxane) Heavy structure having a structure in which part or all of them are substituted with aralkyl groups Body, etc.) and the like.
- silicone compound for example, trade names “BYK-302”, “BYK-307”, “BYK-333”, “BYK-349”, “BYK-375”, “BYK-377” (above, manufactured by Big Chemie Japan Co., Ltd.), trade names “Polyflow KL-401”, “Polyflow KL-402”, “Polyflow KL-403”, “Polyflow KL-404” (above, Kyoeisha) Chemical Co., Ltd.) can be used.
- hydrocarbon compounds include polymers composed of acrylic monomers as essential monomer components (acrylic polymers having structural units derived from acrylic monomers as essential structural units).
- acrylic monomer include acrylic acid alkyl ester (or methacrylic acid alkyl ester), acrylic acid ester (or methacrylic acid ester) having a polar group such as hydroxyl group, carboxyl group, amino group, and polyester structure (for example, Acrylic acid ester or methacrylic acid ester (or methacrylic acid ester) having an aliphatic polyester structure, an alicyclic polyester structure, an aromatic polyester structure, etc.) or a polyether structure (eg, polyoxyalkylene structure).
- Acrylic acid or methacrylic acid salts of acrylic acid or methacrylic acid; acrylamide or methacrylamide.
- the acrylic polymer may be a homopolymer or a copolymer, and can be obtained by a known or conventional polymerization method.
- hydrocarbon compounds for example, trade names “BYK-350”, “BYK-356”, “BYK-361N”, “BYK-3550” (above, Big Chemie Japan). (Trade name) “Polyflow No. 75”, “Polyflow No. 77”, “Polyflow No. 90”, “Polyflow No. 95”, “Polyflow No. 99C” (above, Kyoeisha Chemical Co., Ltd.) Can be used.
- the content (amount used) of the surface modifier is not particularly limited, but is preferably 0.01 to 1.0% by weight, preferably 0.05 to 0.00%, based on the total amount (100% by weight) of the photocurable composition. 5% by weight is more preferred.
- the photocurable composition of the present invention may contain various additives as long as the effects of the present invention are not impaired.
- the additive include conventional additives such as antifoaming agents, antioxidants, heat stabilizers, weathering stabilizers, light stabilizers, and adhesion promoters. These additives can be used alone or in combination of two or more.
- substrate of this invention etches an inorganic material board
- the fine pattern substrate method of the present invention can be manufactured through the following steps, for example.
- Step 1 A photocurable composition for nanoimprint is thinly applied to the surface of an inorganic material substrate to form a coating film.
- Step 2 A mold on which a pattern is formed is brought into contact with the obtained coating film to transfer the pattern (imprint process).
- Step 3 The photocurable composition for nanoimprint is cured by light irradiation, and then released to obtain a thin film to which the pattern shape of the mold is transferred.
- Process 4 A fine pattern is obtained by etching an inorganic material board
- a silicon substrate, a sapphire substrate, a ceramic substrate, an alumina substrate, a gallium phosphide substrate, a gallium arsenide substrate, an indium phosphide substrate, a gallium nitride substrate, or the like may be used. it can.
- Examples of a method for applying the photocurable composition for nanoimprinting onto the surface of the inorganic material substrate include a screen printing method, a curtain coating method, and a spray method.
- a diluent solvent eg, glycol derivatives such as ethylene glycol monoethyl ether, ethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monomethyl ether acetate; acetone, methyl ethyl ketone
- the concentration can be adjusted by diluting with ketones such as methyl butyl ketone and cyclohexanone; esters such as methyl lactate, ethyl lactate, ethyl acetate and butyl acetate).
- the thickness of the coating film is, for example, about 0.1 to 10 ⁇ m, preferably 0.3 to 3 ⁇ m. In this invention, since the said photocurable composition
- Examples of the mold used in Step 2 include a silicone mold, a thermoplastic resin mold, a curable resin mold, and a metal mold.
- the pressing force for bringing the mold into contact with the coating film is, for example, about 100 to 1000 Pa.
- the time for contacting the mold with the coating film is, for example, about 1 to 100 seconds.
- the pattern shape of the mold is not particularly limited as long as it is a shape that can improve the extraction efficiency of light generated in the light emitting layer, and examples thereof include a trapezoidal shape, a conical shape, and a round shape. .
- the light (active energy ray) used for light irradiation in the step 3 may be light that causes the polymerization reaction of the photocurable composition for nanoimprinting to proceed, and may be infrared rays, visible rays, ultraviolet rays, X-rays, electron beams, ⁇ Any of a line, a beta ray, a gamma ray, etc. can be used. Of these, ultraviolet rays are preferable in terms of excellent handleability.
- a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a xenon lamp, a carbon arc, a metal halide lamp, sunlight, an LED lamp, a laser, or the like can be used.
- the photocurable composition for nanoimprinting of the present invention has the above-described configuration, the curing rate is very high and the thin film curability is excellent.
- the light irradiation condition when a 1 ⁇ m-thick film is formed by irradiating with ultraviolet rays, it is preferable to adjust the ultraviolet ray integrated light amount to, for example, about 100 to 3000 mJ / cm 2 .
- a post cure step may be provided between step 3 and step 4.
- Post-cure can be performed by heating and / or light irradiation. When post-cure is performed by heating, it is preferable to heat at 50 to 180 ° C. for about 0.5 to 3 hours, for example. When post-cure is performed by light irradiation, it is preferable to irradiate for about 10 to 100 seconds with an irradiation intensity of about 10 to 100 mW / cm 2 , for example.
- Examples of the etching method in step 4 include a dry etching method and a wet etching method.
- a dry etching method it is particularly preferable to employ a dry etching method, and in particular, it is preferable to employ reactive ion etching (RIE) in terms of enabling highly accurate fine processing.
- RIE reactive ion etching
- a thin film can be rapidly formed on the surface of an inorganic material substrate by light irradiation.
- the thin film onto which the shape of the mold thus obtained is accurately transferred is used as a mask, a fine pattern substrate on which a fine pattern of the mold is accurately transferred can be obtained.
- the fine pattern substrate of the present invention is a fine pattern substrate obtained by the method for producing a fine pattern substrate of the present invention.
- the fine pattern substrate of the present invention has good film thickness uniformity and shape transferability, and is useful, for example, as a semiconductor material, a diffractive condensing film, a polarizing film, an optical waveguide, or a hologram.
- the semiconductor device for example, LED
- the semiconductor device is equipped with the said fine pattern board
- the LED is composed of a light emitter obtained by growing a light emitting layer (GaN layer) on the surface of the fine pattern substrate by metal organic vapor phase epitaxy (MOVPE), a lens, a wiring, and the like.
- a light emitter obtained by growing a light emitting layer (GaN layer) on the surface of the fine pattern substrate by metal organic vapor phase epitaxy (MOVPE), a lens, a wiring, and the like.
- MOVPE metal organic vapor phase epitaxy
- the semiconductor device (especially LED) of the present invention has a fine pattern substrate formed using the photocurable composition for nanoimprinting of the present invention, and thus has excellent light extraction efficiency, high luminance, long life, and low power consumption. And low heat-generating properties.
- Preparation Example 1 (Preparation of (3,4,3 ′, 4′-diepoxy) bicyclohexyl (a-1)) A dehydration catalyst was prepared by stirring and mixing 70 g (0.68 mol) of 95 wt% sulfuric acid and 55 g (0.36 mol) of 1,8-diazabicyclo [5.4.0] undecene-7 (DBU).
- DBU 1,8-diazabicyclo [5.4.0] undecene-7
- the obtained bicyclohexyl-3,3′-diene (243 g) and ethyl acetate (730 g) were charged into a reactor, and nitrogen was blown into the gas phase portion, and the temperature in the reaction system was controlled to 37.5 ° C. Then, 274 g of a 30 wt% peracetic acid ethyl acetate solution (water content 0.41 wt%) was added dropwise over about 3 hours. After the peracetic acid solution was dropped, the reaction was terminated by aging at 40 ° C. for 1 hour.
- the photocurable resin compositions of Examples and Comparative Examples were prepared by blending the components shown in Table 1 below into an eggplant flask according to the blending composition and stirring and mixing until dissolved at 30 ° C. A curable resin composition was obtained.
- the numerical value in following Table 1 represents a weight part.
- Viscosity measurement The viscosity (mPa ⁇ s) of the photocurable compositions for nanoimprints obtained in the examples and comparative examples is an E-type viscometer (trade name “TVE-25H”, Toki Sangyo Co., Ltd.) Used). About 1.1 mL of a sample was collected, the temperature was set to 23 ° C., the measurement range was set to “H”, and the indicated value after 3 minutes at 100 rpm was taken as the viscosity.
- E-type viscometer trade name “TVE-25H”, Toki Sangyo Co., Ltd.
- the thickness of the obtained thin film was measured using a step gauge (trade name “T-4000”, manufactured by Kosaka Laboratory Ltd.), and the difference between the center (T 1 ) and the outermost periphery (T 2 ) ( The surface uniformity was evaluated according to the following criteria with T 1 -T 2 ) as the step.
- the thickness of the obtained thin film was measured using a step gauge (trade name “T-4000”, manufactured by Kosaka Laboratory Ltd.), and the difference between the center (T 1 ) and the outermost periphery (T 2 ) ( The surface uniformity was evaluated according to the following criteria with T 1 -T 2 ) as the step.
- the photocurable composition for nanoimprinting of the present invention can be applied to lithography using active rays such as deep ultraviolet rays, electron beams, ion beams, and X-rays in semiconductor processes, liquid crystal display elements, integrated circuit elements, solid-state imaging elements, etc.
- Active rays such as deep ultraviolet rays, electron beams, ion beams, and X-rays
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Abstract
Description
本発明の他の目的は、前記ナノインプリント用光硬化性組成物を使用する微細パターン基板の製造方法を提供することにある。
本発明のさらに他の目的は、前記微細パターン基板の製造方法により得られる微細パターン基板、及びそれを備える半導体装置を提供することにある。
成分(A):下記式(1)で表されるカチオン硬化性化合物
成分(B):光カチオン重合開始剤
成分(C):水酸基を含有する沸点が100℃~210℃(760mmHg)である溶剤
成分(D):水酸基を含有せず、沸点が140℃~210℃(760mmHg)であり、溶解度パラメーターが8.0~10.0(cal/cm3)1/2のモノマー溶解性を有する溶剤
[1]上記成分(A)、成分(B)、成分(C)及び成分(D)を含み、前記成分(C)が光硬化性組成物全量(100重量%)に対して1~30重量%であることを特徴とするナノインプリント用光硬化性組成物。
[2]さらに、芳香環及び/又は脂環と、カチオン硬化性官能基とを含有する化合物(但し、前記成分(A)に該当する化合物を除く)を含む上記[1]に記載のナノインプリント用光硬化性組成物。
[3]前記芳香環及び/又は脂環と、カチオン硬化性官能基とを含有する化合物(但し、前記成分(A)に該当する化合物を除く)が、オキセタン化合物である上記[2]に記載のナノインプリント用光硬化性組成物。
[4]前記芳香環及び/又は脂環を含むカチオン硬化性官能基を含有した化合物の含有量が、光硬化性組成物全量(100重量%)に対して5~60重量%である上記[2]又は[3]に記載のナノインプリント用光硬化性組成物。
[5]さらに、シリコーン系表面調整剤又は炭化水素系表面調整剤を含む上記[1]~[4]の何れか1項に記載のナノインプリント用光硬化性組成物。
[6]上記成分(A)の式(1)で表されるカチオン硬化性化合物が、式(1-1)~(1~10)で表される化合物である上記[1]~[5]の何れか1項に記載のナノインプリント用光硬化性組成物。
[7]上記成分(A)の式(1)で表されるカチオン硬化性化合物が、(3,4,3’,4’-ジエポキシ)ビシクロヘキシルである上記[1]~[6]の何れか1項に記載のナノインプリント用光硬化性組成物。
[8]上記成分(A)の含有量が、光硬化性組成物全量(100重量%)に対して5~40重量%である上記[1]~[7]の何れか1項に記載のナノインプリント用光硬化性組成物。
[9]上記成分(B)である光カチオン重合開始剤が、ジアゾニウム塩系化合物、ヨードニウム塩系化合物、スルホニウム塩系化合物、ホスホニウム塩系化合物、セレニウム塩系化合物、オキソニウム塩系化合物、アンモニウム塩系化合物、臭素塩系化合物から選択される少なくとも1つの化合物である上記[1]~[8]の何れか1項に記載のナノインプリント用光硬化性組成物。
[10]上記成分(B)の含有量が、光硬化性組成物全量(100重量%)に対して0.1~2.0重量%である上記[1]~[9]の何れか1項に記載のナノインプリント用光硬化性組成物。
[11]上記成分(C)が、3-メトキシブタノール、メトキシプロパノールから選択される少なくとも1つの溶剤である上記[1]~[10]の何れか1項に記載のナノインプリント用光硬化性組成物。
[12]上記成分(C)の含有量が、光硬化性組成物全量(100重量%)に対して、1~30重量%である上記[1]~[11]の何れか1項に記載のナノインプリント用光硬化性組成物。
[13]上記成分(D)が、1-メトキシ-2-プロピルアセテート、3-メトキシブチルアセテートから選択される少なくとも1つの溶剤である上記[1]~[12]の何れか1項に記載のナノインプリント用光硬化性組成物。
[14]上記成分(D)の含有量が、光硬化性組成物全量(100重量%)に対して、20~90重量%である上記[1]~[13]の何れか1項に記載のナノインプリント用光硬化性組成物。
[15]上記成分(C)と上記成分(D)の割合(重量比)が、3:95~40:60である上記[1]~[14]の何れか1項に記載のナノインプリント用光硬化性組成物。
[16]前記シリコーン系表面調整剤又は炭化水素系表面調整剤の含有量(使用量)が、光硬化性組成物全量(100重量%)に対して0.01~1.0重量%である上記[5]~[15]の何れか1項に記載のナノインプリント用光硬化性組成物。
[17]上記[1]~[16]の何れか1項に記載のナノインプリント用光硬化性組成物にインプリント加工を施して得られたマスクを使用して無機材料基板をエッチングする微細パターン基板の製造方法。
[18]上記[17]に記載の微細パターン基板の製造方法により得られる微細パターン基板。
[19]上記[18]に記載の微細パターン基板を備える半導体装置。
成分(A):下記式(1)で表されるカチオン硬化性化合物
成分(B):光カチオン重合開始剤
成分(C):水酸基を含有する沸点が100℃~210℃(760mmHg)である溶剤
成分(D):水酸基を含有せず、沸点が140℃~210℃(760mmHg)であり、溶解度パラメーターが8.0~10.0(cal/cm3)1/2のモノマー溶解性を有する溶剤
本発明の成分(A)は、下記式(1)で表されるカチオン硬化性を有する化合物である。
本発明の成分(B)である光カチオン重合開始剤は、光の照射により酸を発生し、発生した酸によりナノインプリント用光硬化性組成物に含まれるカチオン重合性化合物の硬化反応を開始させる化合物(=光酸発生剤)であり、光を吸収するカチオン部と酸の発生源となるアニオン部からなる。
本発明の成分(C)は、水酸基を含有する沸点100℃~210℃(760mmHg)の溶剤であれば、特に制限されない。上記沸点は、110~180℃が好ましく、120~170℃がより好ましく、130~160℃がさらに好ましい。なお、成分(C)は、本発明の光硬化性組成物に含まれるものとする。
本発明の成分(D)は、水酸基を含有しない沸点が140℃~210℃(760mmHg)のモノマー溶解性を有する溶剤であれば、特に制限されない。上記沸点は、145~195℃が好ましく、147~190℃がより好ましく、150~180℃がさらに好ましい。なお、成分(D)は、本発明の光硬化性組成物に含まれるものとする。
本発明の光硬化性組成物は、特に制限されないが、必要に応じて表面調整剤を添加することができる。本発明の表面調整剤は、樹脂表面の表面張力を変化させ、濡れ性、レベリング性、スリップ性、消泡性など(特に、濡れ性、レベリング性)を向上させる化合物である。
本発明の光硬化性組成物は、上記以外にも、本発明の効果を損なわない範囲内で各種添加剤を含有していてもよい。上記添加剤としては、例えば、消泡剤、酸化防止剤、耐熱安定剤、耐候安定剤、光安定剤、密着性付与剤等の慣用の添加剤が挙げられる。これらの添加剤は、単独で又は2種以上を組み合わせて使用できる。
本発明の微細パターン基板の製造方法は、上記ナノインプリント用光硬化性組成物にインプリント加工を施して得られたマスクを使用して無機材料基板をエッチングすることを特徴とする。本発明の微細パターン基板方法は、例えば、下記の工程を経て製造することができる。
工程1:無機材料基板表面にナノインプリント用光硬化性組成物を薄く塗布し塗膜を形成する。
工程2:得られた塗膜にパターンが形成されたモールドを接触させ該パターンを転写する(インプリント加工)。
工程3:光照射によりナノインプリント用光硬化性組成物を硬化させ、その後、離型して、モールドのパターン形状が転写された薄膜を得る。
工程4:モールドのパターン形状が転写された薄膜をマスクとして、無機材料基板をエッチングすることにより微細パターンを得る。
本発明の微細パターン基板は、本発明の微細パターン基板の製造方法により得られた微細パターン基板である。本発明の微細パターン基板は、膜厚の均一性や形状転写性が良く、例えば、半導体材料、回折型集光フィルム、偏光フィルム、光導波路、又はホログラムとして有用である。
本発明の半導体装置(例えば、LED)は、上記微細パターン基板を備えることを特徴とする。
95重量%硫酸70g(0.68モル)と1,8-ジアザビシクロ[5.4.0]ウンデセン-7(DBU)55g(0.36モル)を撹拌混合して脱水触媒を調製した。
撹拌機、温度計、および脱水管を備え且つ保温された留出配管を具備した3リットルのフラスコに、水添ビフェノール(=4,4’-ジヒドロキシビシクロヘキシル)1000g(5.05モル)、上記で調製した脱水触媒125g(硫酸として0.68モル)、プソイドクメン1500gを入れ、フラスコを加熱した。内温が115℃を超えたあたりから水の生成が確認された。さらに昇温を続けてプソイドクメンの沸点まで温度を上げ(内温162~170℃)、常圧で脱水反応を行った。副生した水は留出させ、脱水管により系外に排出した。なお、脱水触媒は反応条件下において液体であり反応液中に微分散していた。3時間経過後、ほぼ理論量の水(180g)が留出したため反応終了とした。反応終了液を10段のオールダーショウ型の蒸留塔を用い、プソイドクメンを留去した後、内部圧力10Torr(1.33kPa)、内温137~140℃にて蒸留し、731gのビシクロヘキシル-3,3’-ジエンを得た。
(a-1):製造例1により得られた化合物((3,4,3’,4’-ジエポキシ)ビシクロヘキシル)
OXBP:ビフェニル骨格を有するオキセタン化合物、商品名「OXBP」、宇部興産(株)製)
N-890:変性ノボラック型エポキシ樹脂、(商品名「EPICLON N-890」、DIC(株)製)
HP-7200:ジシクロペンタジエン型エポキシ樹脂(商品名「EPICLON HP-7200」、DIC(株)製)
HP-4032:ナフタレン型エポキシ樹脂(商品名「EPICLON HP-4032」、DIC(株)製)
PG-100:フルオレン型エポキシ樹脂(商品名「オグソール PG-100」、大阪ガスケミカル(株)製)
(b-1):フッ化アルキルフルオロリン酸アニオンを含む開始剤、[4-(4-ビフェニリルチオ)フェニル]-4-ビフェニリルフェニルスルホニウムトリス(ペンタフルオロエチル)トリフルオロホスフェートをプロピレンカーボネートで50%に希釈した化合物
MB:3-メトキシブタノール(商品名「MB」、(株)ダイセル製 沸点:161℃、溶解度パラメーター:10.9(cal/cm3)1/2)
MMPG:メトキシプロパノール(商品名「MMPG」、(株)ダイセル製 沸点:121℃、溶解度パラメーター:10.2(cal/cm3)1/2)
MMPGAC:1-メトキシ-2-プロピルアセテート(商品名「MMPGAC」、(株)ダイセル製 沸点:146℃、溶解度パラメーター:8.7(cal/cm3)1/2)
MBA:3-メトキシブチルアセテート(商品名「MBA」、(株)ダイセル製 沸点:171℃、溶解度パラメーター:8.7(cal/cm3)1/2)
BA:酢酸ブチル(商品名「BA」、(株)ダイセル製 沸点:126℃、溶解度パラメーター:8.7(cal/cm3)1/2)
BYK-350:アクリル系共重合物(商品名「BYK-350」、ビックケミー・ジャパン(株)製)
BYK-UV3510:ポリエーテル変性ポリジメリルシロキサンとポリエーテルの混合物(商品名「BYK-UV3510」、ビックケミー・ジャパン(株)製)
下記(1)~(5)の評価項目の結果を下記表2に示す。
表1のナノインプリント用光硬化性組成物を透明な10mLガラス瓶に約5mL抜き取り、見た目で異物の有無や液の濁りを確認した。
実施例及び比較例で得られたナノインプリント用光硬化性組成物の粘度(mPa・s)は、E型粘度計(商品名「TVE-25H」、東機産業(株)社製)を用いた。標品を約1.1mL採取し、温度23℃、測定レンジを「H」に設定し、100rpmにおける3分後の指示値を粘度とした。
実施例及び比較例で得られた希釈液をスピンコーターを用い、500rpmで10秒、その後3000rpmで20秒のスピンコート回転数でシリコンウェハ上に塗布して塗膜(膜厚:1μm)を形成した。
得られた塗膜にポリジメチルシロキサンモールド(パターンの高さ対横幅比(=アスペクト比)2:1)を200Paで押圧して60秒間接触させた状態で、紫外線照射装置(UVもしくはUV-LED照射装置)を用いて1000mJ/cm2の光量の紫外線を照射し、その後離型することにより、表面にポリジメチルシロキサンモールドのパターンがインプリントされた薄膜を得た。
得られた薄膜を25℃条件下でアセトンに5秒間浸漬し、その後の薄膜について目視で観察し、下記の基準により硬化性を評価した。
評価基準
○:パターン形状が乱れることなく、保持された
△:パターンの一部がアセトンに溶解し、残存した樹脂が白く基板に残っており、パターンに欠損がみられた
×:パターンが完全に失われた
上記(3)硬化性の評価において得られた表面にシリコーンモールドのパターンがインプリントされた薄膜について、パターンの高さ対横幅比(=アスペクト比)を測定し、下記基準により形状安定性を評価した。
評価基準
○:アスペクト比が2:1~1.9:1の場合
△:アスペクト比が1.5:1以上、1.9:1未満の場合
×:アスペクト比が1.5:1未満の場合、もしくはパターンが崩れている箇所が存在する場合
実施例及び比較例で得られたナノインプリント用光硬化性組成物をスピンコーターを用いて表に記載のスピンコート回転数でシリコンウェハ上に塗布して塗膜(膜厚:1μm)を形成した。得られた塗膜に紫外線照射装置(UVもしくはUV-LED照射装置)を用いて1000mJ/cm2の光量の紫外線を照射して薄膜を得た。
得られた薄膜の厚みを段差計(商品名「T-4000」、(株)小坂研究所社製)を使用して測定し、中心部(T1)と最外周(T2)の差(T1-T2)を段差とし、下記基準により表面均一性を評価した。
評価基準
○:段差(T1-T2)が0.020μm以下の場合
△:段差(T1-T2)が0.020μmを超え、0.050μm以下場合
×:段差(T1-T2)が0.050μmを超える場合
実施例及び比較例で得られたナノインプリント用光硬化性組成物をスピンコーターを用いて表に記載のスピンコート回転数でシリコンウェハ上に塗布して塗膜(膜厚:1μm)を形成した。塗布後1時間23℃、50%RHの環境下で放置した後、得られた塗膜に紫外線照射装置(UVもしくはUV-LED照射装置)を用いて1000mJ/cm2の光量の紫外線を照射して薄膜を得た。
得られた薄膜の厚みを段差計(商品名「T-4000」、(株)小坂研究所社製)を使用して測定し、中心部(T1)と最外周(T2)の差(T1-T2)を段差とし、下記基準により表面均一性を評価した。
評価基準
○:段差(T1-T2)が0.020μm以下の場合
△:段差(T1-T2)が0.020μmを超え、0.050μm以下場合
×:段差(T1-T2)が0.050μmを超える場合
Claims (6)
- 下記成分(A)、成分(B)、成分(C)及び成分(D)を含み、前記成分(C)が光硬化性組成物全量(100重量%)に対して1~30重量%であることを特徴とするナノインプリント用光硬化性組成物。
成分(A):下記式(1)で表されるカチオン硬化性化合物
成分(B):光カチオン重合開始剤
成分(C):水酸基を含有する沸点が100℃~210℃(760mmHg)である溶剤
成分(D):水酸基を含有せず、沸点が140℃~210℃(760mmHg)であり、溶解度パラメーターが8.0~10.0(cal/cm3)1/2のモノマー溶解性を有する溶剤
[式(1)中、R1~R18は同一又は異なって、水素原子、ハロゲン原子、酸素原子若しくはハロゲン原子を含んでいてもよい炭化水素基、又は置換基を有していてもよいアルコキシ基を示す。Xは、単結合又は連結基を示す] - さらに、芳香環及び/又は脂環と、カチオン硬化性官能基とを含有する化合物(但し、前記成分(A)に該当する化合物を除く)を含む請求項1に記載のナノインプリント用光硬化性組成物。
- さらに、シリコーン系表面調整剤又は炭化水素系表面調整剤を含む請求項1又は2に記載のナノインプリント用光硬化性組成物。
- 請求項1~3の何れか1項に記載のナノインプリント用光硬化性組成物にインプリント加工を施して得られたマスクを使用して無機材料基板をエッチングする微細パターン基板の製造方法。
- 請求項4に記載の微細パターン基板の製造方法により得られる微細パターン基板。
- 請求項5に記載の微細パターン基板を備える半導体装置。
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| JP2015559840A JPWO2015115128A1 (ja) | 2014-01-29 | 2015-01-06 | ナノインプリント用光硬化性組成物、及びそれを使用した微細パターンの形成方法 |
| US15/111,552 US20160334701A1 (en) | 2014-01-29 | 2015-01-06 | Photocurable composition for nanoimprinting, and method for forming fine pattern using the same |
| CN201580004327.9A CN105900211A (zh) | 2014-01-29 | 2015-01-06 | 纳米压印用光固化性组合物、以及使用了该组合物的微细图案的形成方法 |
| KR1020167018353A KR20160111918A (ko) | 2014-01-29 | 2015-01-06 | 나노임프린트용 광 경화성 조성물, 및 그것을 사용한 미세 패턴의 형성 방법 |
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| KR (1) | KR20160111918A (ja) |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017036421A (ja) * | 2015-08-13 | 2017-02-16 | 株式会社ダイセル | 硬化性組成物及びその硬化物 |
| WO2017026352A1 (ja) * | 2015-08-13 | 2017-02-16 | 株式会社ダイセル | 硬化性組成物及びその硬化物 |
| JP2019183168A (ja) * | 2019-07-05 | 2019-10-24 | 株式会社ダイセル | 硬化性組成物及びその硬化物 |
| US11415888B2 (en) | 2016-08-31 | 2022-08-16 | Tokyo Ohka Kogyo Co., Ltd. | Negative type photosensitive resin composition, photosensitive resist film, pattern forming method, cured film, and method of producing cured film |
| US11549020B2 (en) | 2019-09-23 | 2023-01-10 | Canon Kabushiki Kaisha | Curable composition for nano-fabrication |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6204420B2 (ja) * | 2015-08-07 | 2017-09-27 | 株式会社ダイセル | 硬化性組成物、及びそれを用いた光学素子 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008238417A (ja) * | 2007-03-24 | 2008-10-09 | Daicel Chem Ind Ltd | ナノインプリント用光硬化性樹脂組成物 |
| JP2008246876A (ja) * | 2007-03-30 | 2008-10-16 | Tokyo Ohka Kogyo Co Ltd | ナノインプリント用の膜形成組成物、並びに構造体の製造方法及び構造体 |
| JP2008266608A (ja) * | 2007-03-24 | 2008-11-06 | Daicel Chem Ind Ltd | ナノインプリント用硬化性樹脂組成物 |
| JP2011186418A (ja) * | 2009-06-23 | 2011-09-22 | Fujifilm Corp | 化学増幅型レジスト組成物、並びに、これを用いたモールドの作成方法、及び、レジスト膜 |
| JP2011215243A (ja) * | 2010-03-31 | 2011-10-27 | Hoya Corp | レジスト現像剤、レジストパターンの形成方法及びモールドの製造方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2757490B2 (ja) | 1989-09-25 | 1998-05-25 | 松下電器産業株式会社 | スクリーンマスクのパターンマッチング方法 |
| JP2002246293A (ja) | 2001-02-19 | 2002-08-30 | Sony Corp | フォトレジストのコーティング方法 |
| ATE544093T1 (de) * | 2006-11-01 | 2012-02-15 | Koninkl Philips Electronics Nv | Imprintmethode zur herstellung einer reliefschicht und deren nutzung als ätzmaske |
| JP5143449B2 (ja) * | 2007-03-02 | 2013-02-13 | 株式会社ダイセル | 熱又は活性エネルギー線硬化型接着剤 |
| JP5101343B2 (ja) * | 2008-03-03 | 2012-12-19 | 株式会社ダイセル | 微細構造物の製造方法 |
| JP2009215179A (ja) * | 2008-03-07 | 2009-09-24 | Fujifilm Corp | (メタ)アクリレート化合物、これを用いた硬化性組成物、光ナノインプリント用組成物、並びにこれらの硬化性組成物の硬化物およびその製造方法 |
| JP2011157482A (ja) | 2010-02-01 | 2011-08-18 | Maruzen Petrochem Co Ltd | 光インプリント用樹脂組成物、パターン形成方法、及びエッチングマスク |
| JP5634799B2 (ja) * | 2010-08-26 | 2014-12-03 | 株式会社ダイセル | 微細パターン形成用放射線硬化性樹脂組成物、及び該組成物を用いた微細構造体の製造方法 |
| JP5764432B2 (ja) * | 2011-01-07 | 2015-08-19 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物 |
| JP2014103135A (ja) * | 2011-03-10 | 2014-06-05 | Toyo Gosei Kogyo Kk | 光硬化物の製造方法 |
-
2015
- 2015-01-06 CN CN201580004327.9A patent/CN105900211A/zh active Pending
- 2015-01-06 US US15/111,552 patent/US20160334701A1/en not_active Abandoned
- 2015-01-06 WO PCT/JP2015/050132 patent/WO2015115128A1/ja not_active Ceased
- 2015-01-06 KR KR1020167018353A patent/KR20160111918A/ko not_active Withdrawn
- 2015-01-06 JP JP2015559840A patent/JPWO2015115128A1/ja active Pending
- 2015-01-26 TW TW104102453A patent/TWI643898B/zh not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008238417A (ja) * | 2007-03-24 | 2008-10-09 | Daicel Chem Ind Ltd | ナノインプリント用光硬化性樹脂組成物 |
| JP2008266608A (ja) * | 2007-03-24 | 2008-11-06 | Daicel Chem Ind Ltd | ナノインプリント用硬化性樹脂組成物 |
| JP2008246876A (ja) * | 2007-03-30 | 2008-10-16 | Tokyo Ohka Kogyo Co Ltd | ナノインプリント用の膜形成組成物、並びに構造体の製造方法及び構造体 |
| JP2011186418A (ja) * | 2009-06-23 | 2011-09-22 | Fujifilm Corp | 化学増幅型レジスト組成物、並びに、これを用いたモールドの作成方法、及び、レジスト膜 |
| JP2011215243A (ja) * | 2010-03-31 | 2011-10-27 | Hoya Corp | レジスト現像剤、レジストパターンの形成方法及びモールドの製造方法 |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107849222B (zh) * | 2015-08-13 | 2021-06-11 | 株式会社大赛璐 | 固化性组合物及其固化物 |
| WO2017026352A1 (ja) * | 2015-08-13 | 2017-02-16 | 株式会社ダイセル | 硬化性組成物及びその硬化物 |
| WO2017026351A1 (ja) * | 2015-08-13 | 2017-02-16 | 株式会社ダイセル | 硬化性組成物及びその硬化物 |
| JP2017036422A (ja) * | 2015-08-13 | 2017-02-16 | 株式会社ダイセル | 硬化性組成物及びその硬化物 |
| CN107849222A (zh) * | 2015-08-13 | 2018-03-27 | 株式会社大赛璐 | 固化性组合物及其固化物 |
| CN107922586A (zh) * | 2015-08-13 | 2018-04-17 | 株式会社大赛璐 | 固化性组合物及其固化物 |
| US10988568B2 (en) | 2015-08-13 | 2021-04-27 | Daicel Corporation | Curable composition and cured product from same |
| US10988569B2 (en) | 2015-08-13 | 2021-04-27 | Daicel Corporation | Curable composition and cured product from same |
| JP2017036421A (ja) * | 2015-08-13 | 2017-02-16 | 株式会社ダイセル | 硬化性組成物及びその硬化物 |
| CN107922586B (zh) * | 2015-08-13 | 2021-07-23 | 株式会社大赛璐 | 固化性组合物及其固化物 |
| US11415888B2 (en) | 2016-08-31 | 2022-08-16 | Tokyo Ohka Kogyo Co., Ltd. | Negative type photosensitive resin composition, photosensitive resist film, pattern forming method, cured film, and method of producing cured film |
| JP2019183168A (ja) * | 2019-07-05 | 2019-10-24 | 株式会社ダイセル | 硬化性組成物及びその硬化物 |
| US11549020B2 (en) | 2019-09-23 | 2023-01-10 | Canon Kabushiki Kaisha | Curable composition for nano-fabrication |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2015115128A1 (ja) | 2017-03-23 |
| TWI643898B (zh) | 2018-12-11 |
| TW201533146A (zh) | 2015-09-01 |
| CN105900211A (zh) | 2016-08-24 |
| KR20160111918A (ko) | 2016-09-27 |
| US20160334701A1 (en) | 2016-11-17 |
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