WO2013035569A1 - 樹脂組成物 - Google Patents
樹脂組成物 Download PDFInfo
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- WO2013035569A1 WO2013035569A1 PCT/JP2012/071582 JP2012071582W WO2013035569A1 WO 2013035569 A1 WO2013035569 A1 WO 2013035569A1 JP 2012071582 W JP2012071582 W JP 2012071582W WO 2013035569 A1 WO2013035569 A1 WO 2013035569A1
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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
- C09D139/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Coating compositions based on derivatives of such polymers
- C09D139/04—Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
- C08F220/36—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate containing oxygen in addition to the carboxy oxygen, e.g. 2-N-morpholinoethyl (meth)acrylate or 2-isocyanatoethyl (meth)acrylate
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D135/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least another carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D135/02—Homopolymers or copolymers of esters
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/20—Esters of polyhydric alcohols or phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
- C08F220/343—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate in the form of urethane links
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/36—Amides or imides
- C08F222/40—Imides, e.g. cyclic imides
- C08F222/402—Alkyl substituted imides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
Definitions
- the present invention relates to a thermosetting resin composition, and a cured film, a microlens, and a planarizing film formed from the resin composition.
- An etch back method is known as one of the methods for manufacturing a microlens for a CCD / CMOS image sensor (Patent Document 1 and Patent Document 2). That is, a resist pattern is formed on the microlens resin layer formed on the color filter layer, and this resist pattern is reflowed by heat treatment to form a lens pattern. Using the lens pattern formed by reflowing the resist pattern as an etching mask, the lower microlens resin layer is etched back, and the lens pattern shape is transferred to the microlens resin layer to produce a microlens.
- the etch back method requires that the dry etching rate X of the resist and the dry etching rate Y of the microlens resin layer be equal when the lens pattern shape is faithfully transferred to the lower microlens resin layer.
- a resist containing a novolac resin is often used.
- the resist may be a resist containing an acrylic resin having a higher dry etching rate than a resist containing a novolac resin.
- the present invention has been made based on the above circumstances, and the problems to be solved are excellent transparency, heat resistance, solvent resistance, flatness, and dry etching rate of a resist containing novolac resin.
- An object of the present invention is to provide a thermosetting resin composition excellent in storage stability, which can form a cured film having a dry etching rate of 1.3 to 1.7 times.
- Another problem to be solved by the present invention is to provide a microlens having excellent transparency, heat resistance and solvent resistance.
- the present invention provides a resin composition containing a copolymer having a structural unit represented by the following formula (1), formula (2) and formula (3) and a solvent.
- X represents an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 5 or 6 carbon atoms, a phenyl group or a benzyl group, the alkyl group, the cycloalkyl group, the phenyl group and the benzyl group).
- part or all of the hydrogen atoms may be substituted with a halogen atom, a carboxyl group, a hydroxy group, an amino group or a nitro group
- R 1 independently represents a hydrogen atom or a methyl group
- R 2 represents Represents a single bond or an alkylene group having 1 to 5 carbon atoms
- R 3 represents a blocked isocyanate group
- Y represents an —O— group or —NH— group
- R 4 represents a single bond or 1 to 5 carbon atoms.
- R 5 represents a hydrocarbon group having 1 to 20 carbon atoms having a hydroxy group as a substituent, or a phenyl group having a hydroxy group as a substituent, and the above-mentioned 1 to 2 carbon atoms.
- 0 hydrocarbon group may be linear, branched or cyclic).
- the structural unit represented by the formula (2) is represented by the following formula (2-1) or the formula (2-2), the resin composition according to the first aspect, (Wherein R 1 and R 2 have the same meanings as in the first aspect, R 6 independently represents a hydrogen atom, a methyl group or an ethyl group, R 7 represents a methyl group, and a is an integer of 0 to 3) Represents)
- the resin composition according to any one of the first aspect to the fourth aspect for microlenses
- the resin composition according to any one of the first to fourth aspects for a planarizing film
- a microlens made from the resin composition according to the fifth aspect As a 9th viewpoint, it is related with the planarization film
- the microlens produced from the resin composition is produced, for example, by the etch back method described above.
- the resin composition of the present invention is a self-crosslinking type in which the copolymer contained in the composition is derived from the structural unit represented by the formula (2) having a blocked isocyanate group and the formula (3) having a hydroxy group. Therefore, it is not necessary to add a crosslinking agent, and the isocyanate group is blocked in the structural unit represented by the formula (2), so that the storage stability is excellent. Furthermore, the film formed from the resin composition of the present invention has excellent transparency, heat resistance, solvent resistance, flatness, and 1.3 to 1.7 times the dry etching rate of a resist containing a novolac resin. The dry etching rate is as follows.
- the microlens is colored when the heat treatment is performed at a high temperature in the formation process or the formation process of the peripheral device such as the wiring, and the lens shape is The possibility of deformation can be significantly reduced.
- a resin layer is formed from the resin composition of the present invention and a resist is applied thereon, and when an electrode and wiring formation process is performed after forming a microlens or a planarizing film, mixing with the resist, Problems such as deformation and peeling of the microlens or the planarizing film due to the organic solvent can be significantly reduced. Therefore, the resin composition of the present invention is suitable as a material for forming a microlens and a flattened film.
- FIG. 1 is a schematic view showing a cured film formed by applying and baking the resin composition of the present invention on a stepped substrate.
- the present invention is a resin composition containing a copolymer and a solvent.
- the solid content obtained by removing the solvent from the resin composition of the present invention is usually 1% by mass to 50% by mass.
- the copolymer contained in the resin composition of the present invention is a copolymer having a structural unit represented by the above formula (1), formula (2) and formula (3).
- Examples of the structural unit represented by the formula (1) include structural units represented by the following formula (1-1), formula (1-2), and formula (1-3).
- the copolymer may have only one type of structural unit represented by the formula (1) or two or more types.
- the structural unit represented by the formula (2) is formed from (meth) acrylate having a blocked isocyanate group.
- the blocked isocyanate group means a group in which an isocyanate group (—NCO) is blocked by a thermally detachable protecting group, that is, a group obtained by reacting an isocyanate group with a blocking agent.
- the blocking agent include methanol, ethanol, isopropanol, n-butanol, 2-ethoxyhexanol, 2-N, N-dimethylaminoethanol, 2-ethoxyethanol, cyclohexanol and other alcohols, phenol, o-nitrophenol.
- Phenols such as p-chlorophenol, o-cresol, m-cresol, p-cresol, lactams such as ⁇ -caprolactam, acetone oxime, methyl ethyl ketone oxime, methyl isobutyl ketone oxime, cyclohexanone oxime, acetophenone oxime, benzophenone oxime, etc.
- Oximes pyrazoles such as pyrazole, 3,5-dimethylpyrazole, 3-methylpyrazole, thiols such as dodecanethiol, benzenethiol, malonic acid Esters, acetoacetic acid esters, dinitrile malonic acid, acetylacetone, methylene disulfonate, dibenzoylmethane, dipivaloylmethane include active methylene compounds such as acetone dicarboxylic acid diester.
- the compound (monomer) forming the structural unit of the formula (2) include isocyanate-containing (meth) acrylates such as 2-isocyanatoethyl methacrylate and 2-isocyanatoethyl acrylate, methyl ethyl ketone oxime, ⁇ -caprolactam, 3 , 5-dimethylpyrazole, diethyl malonate and the like added with a blocking agent.
- isocyanate-containing (meth) acrylates such as 2-isocyanatoethyl methacrylate and 2-isocyanatoethyl acrylate, methyl ethyl ketone oxime, ⁇ -caprolactam, 3 , 5-dimethylpyrazole, diethyl malonate and the like added with a blocking agent.
- isocyanate-containing (meth) acrylates such as 2-isocyanatoethyl methacrylate and 2-isocyanatoethyl acrylate,
- each R 1 independently represents a hydrogen atom or a methyl group
- each R 2 independently represents a single bond or an alkylene group having 1 to 5 carbon atoms
- two R 6 s independently represent a hydrogen atom
- R 7 represents a methyl group
- a represents an integer of 0 to 3.
- Specific examples of the compound (monomer) forming the structural unit represented by the formula (3) include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 2-hydroxybutyl (meth) acrylate. , 3-hydroxy-1-adamantyl (meth) acrylate, 2,3-dihydroxypropyl (meth) acrylate, 3,5-dihydroxy-1-adamantyl (meth) acrylate, 4-hydroxyphenyl (meth) acrylate, 4-hydroxy Phenylmethyl (meth) acrylate, N- (hydroxymethyl) (meth) acrylamide, N- (2-hydroxyethyl) (meth) acrylamide, N- (4-hydroxyphenyl) (meth) acrylamide, N- (4-hydroxy) Phenylmethyl) (meth) ac Ruamido and the like.
- (meth) acrylate means methacrylate and acrylate
- (meth) acrylamide means methacrylamide and acrylamide
- (meth) acrylic acid means acrylic acid and methacrylic acid.
- each R 1 independently represents a hydrogen atom or a methyl group
- Y represents an —O— group or a —NH— group
- R 5 represents a carbon atom having 1 to 20 carbon atoms having a hydroxy group as a substituent.
- It represents a hydrogen group or a phenyl group having a hydroxy group as a substituent
- the hydrocarbon group having 1 to 20 carbon atoms may be linear, branched or cyclic.
- the structural unit represented by the formula (1) and the structure represented by the formula (2) The content of the structural unit represented by the formula (1) is 20 mol% to 90 mol%, preferably 30 mol% to 80 mol%, with respect to 100 mol% of the unit and the structural unit represented by the formula (3).
- the content of the structural unit represented by the formula (2) is 5 mol% to 75 mol%, preferably 10 mol% to 60 mol%, and the content of the structural unit represented by the formula (3) is 5 mol% to 75 mol%. Preferably, it is 10 mol% to 60 mol%.
- the weight average molecular weight of the copolymer is usually 1,000 to 50,000, preferably 3,000 to 30,000.
- the weight average molecular weight is a value obtained by using gel as a standard sample by gel permeation chromatography (GPC).
- the content of the copolymer in the resin composition of the present invention is usually 1% by mass to 99% by mass, preferably 5% by mass to based on the content in the solid content of the resin composition. 95% by mass.
- a method for obtaining the copolymer is not particularly limited, but generally, a compound (monomer) that forms the structural unit represented by the formula (1), formula (2), or formula (3).
- a compound other than the above compound hereinafter abbreviated as “compound X” in the present specification
- compound X a compound other than the above compound
- the copolymer thus obtained is usually in a solution state dissolved in a solvent, and can be used in the resin composition of the present invention without isolation in this state.
- the copolymer solution obtained as described above is poured into a stirred poor solvent such as hexane, diethyl ether, methanol, water and the like to reprecipitate the copolymer, and the generated precipitate is obtained.
- the copolymer can be made into powder by drying at normal temperature or under reduced pressure at room temperature or heating. By such an operation, a polymerization initiator and an unreacted compound that coexist with the copolymer can be removed.
- the powder of the copolymer may be used as it is, or the powder may be redissolved, for example, in a solvent described later and used as a solution.
- the compound X include (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, and adamantyl (meth) acrylate.
- the method for preparing the resin composition of the present invention is not particularly limited.
- a copolymer having a structural unit represented by the formula (1), formula (2) and formula (3) is dissolved in a solvent, The method of making it a uniform solution is mentioned.
- a method in which other additives are further added and mixed as necessary may be mentioned.
- the solvent is not particularly limited as long as it can dissolve the copolymer.
- examples of such solvents include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate.
- propylene glycol monomethyl ether propylene glycol monomethyl ether acetate, 2-heptanone, ethyl lactate are used from the viewpoint of improving the leveling property of a coating film formed by applying the resin composition of the present invention on a substrate.
- Butyl lactate and cyclohexanone are preferred.
- the resin composition of this invention can also contain surfactant for the purpose of improving applicability
- the surfactant include polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene cetyl ether, polyoxyethylene alkyl ethers such as polyoxyethylene oleyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene Polyoxyethylene alkyl aryl ethers such as ethylene nonylphenyl ether, polyoxyethylene / polyoxypropylene block copolymers, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, sorbitan Sorbitan fatty acid esters such as tristearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene Nonionic surfactants such as polyoxyethylene sorbitan fatty acid esters such as rubitan monopalmitate, polyoxyethylene
- content in the resin composition of this invention is 3 mass% or less based on content in the solid content of the said resin composition, Preferably it is 1 mass%. Or less, more preferably 0.5% by mass or less.
- the resin composition of the present invention is a cross-linking agent, a curing aid, an ultraviolet absorber, a sensitizer, a plasticizer, an antioxidant, an adhesion aid, as necessary, as long as the effects of the present invention are not impaired. Etc. can be included.
- Substrate for example, a semiconductor substrate such as silicon coated with a silicon oxide film, a semiconductor substrate such as silicon coated with a silicon nitride film or a silicon oxynitride film, a silicon nitride substrate, a quartz substrate, a glass substrate (non-alkali glass, low
- a heating means such as a hot plate is used. Bake and cure to form a microlens resin layer.
- Baking conditions are appropriately selected from baking temperatures of 80 ° C. to 300 ° C. and baking times of 0.3 minutes to 60 minutes. Bake may be processed in two steps or more.
- the film thickness of the film formed from the resin composition of the present invention is 0.005 ⁇ m to 5.0 ⁇ m, preferably 0.01 ⁇ m to 3.0 ⁇ m.
- a resist is coated on the microlens resin layer formed from the resin composition of the present invention, exposed through a predetermined mask, and subjected to post-exposure heating (PEB) as necessary, alkali development, rinsing, A predetermined resist pattern is formed by drying.
- PEB post-exposure heating
- g-line, i-line, or KrF excimer laser can be used for exposure.
- the resist pattern is reflowed by heat treatment to form a lens pattern.
- this lens pattern as an etching mask, the lower microlens resin layer is etched back, and the lens pattern shape is transferred to the microlens resin layer to produce a microlens.
- the solution was dropped into a flask kept at ° C over 4 hours. After completion of the dropwise addition, the reaction was carried out for 18 hours to obtain a copolymer solution having a structural unit represented by the following formula (4) (solid content concentration 30% by mass).
- the weight average molecular weight Mw of the obtained copolymer was 11,000 (polystyrene conversion).
- the solution was dropped into a flask kept at ° C over 4 hours. After completion of dropping, the solution was reacted for 18 hours to obtain a solution of a copolymer having a structural unit represented by the following formula (5) (solid content concentration: 30% by mass).
- the weight average molecular weight Mw of the obtained copolymer was 11,000 (polystyrene conversion).
- copolymer solution solid content concentration of 30% by mass
- the weight average molecular weight Mw of the obtained copolymer was 12,000 (polystyrene conversion).
- Example 2 A solution of 50.0 g of the copolymer obtained in Synthesis Example 2 and 0.03 g of MegaFace (registered trademark) R-30 (manufactured by DIC Corporation) as a surfactant were dissolved in 15.0 g of ethyl lactate. It was set as the solution. Then, it filtered using the polyethylene micro filter with the hole diameter of 0.10 micrometer, and prepared the resin composition.
- MegaFace registered trademark
- R-30 manufactured by DIC Corporation
- Example 3 A solution of 50.0 g of the copolymer obtained in Synthesis Example 3 and 0.03 g of MegaFace [registered trademark] R-30 (manufactured by DIC Corporation) as a surfactant were dissolved in 15.0 g of ethyl lactate. It was set as the solution. Then, it filtered using the polyethylene micro filter with the hole diameter of 0.10 micrometer, and prepared the resin composition.
- MegaFace [registered trademark] R-30 manufactured by DIC Corporation
- Example 4 A solution of 50.0 g of the copolymer obtained in Synthesis Example 4 and 0.03 g of MegaFace [registered trademark] R-30 (manufactured by DIC Corporation) as a surfactant were dissolved in 15.0 g of ethyl lactate. It was set as the solution. Then, it filtered using the polyethylene micro filter with the hole diameter of 0.10 micrometer, and prepared the resin composition.
- MegaFace [registered trademark] R-30 manufactured by DIC Corporation
- Megafac® R-30 manufactured by DIC Corporation
- Each of the resin compositions prepared in Examples 1 to 4 was applied onto a silicon wafer using a spin coater, and baked on a hot plate at 100 ° C. for 1 minute and further at 200 ° C. for 5 minutes to obtain a film thickness. A 2 ⁇ m film was formed. Using the etcher and the etching gas, the dry etching rates of these films were measured. Similarly, a resist solution containing a novolak resin (THMR-iP1800 (manufactured by Tokyo Ohka Kogyo Co., Ltd.)) was applied on a silicon wafer using a spin coater, and then heated at 90 ° C. for 1.5 minutes at 110 ° C. The resist film was baked for 1.5 minutes at 180 ° C.
- THMR-iP1800 manufactured by Tokyo Ohka Kogyo Co., Ltd.
- Step flatness The resin composition prepared in Example 1 to Example 4 was applied on a stepped substrate having a height of 0.5 ⁇ m, a line width of 30 ⁇ m, and a space between lines of 30 ⁇ m using a spin coater, and was applied on a hot plate at 100 ° C. Baking was performed for 1 minute and at 200 ° C. for 5 minutes to form a film having a thickness of 2 ⁇ m. The flattening rate was obtained using “formula: (1 ⁇ (h2 / h1)) ⁇ 100” from h1 (step difference of the stepped substrate) and h2 (thickness difference of the cured film) shown in FIG. The evaluation results are shown in Table 1.
- Stepped substrate 2 Cured film 3: Line width 4: Space between lines h1: Stepped portion of stepped substrate h2: Difference in thickness of cured film
Abstract
Description
すなわち、本発明は、第1観点として、下記式(1)、式(2)及び式(3)で表される構造単位を有する共重合体及び溶剤を含有する樹脂組成物。
第2観点として、前記式(2)で表される構造単位は下記式(2-1)又は式(2-2)で表される、第1観点に記載の樹脂組成物、
第3観点として、前記式(3)で表される構造単位は下記式(3-1)で表される、第1観点に記載の樹脂組成物。
第4観点として、前記共重合体の重量平均分子量は1,000乃至50,000である、第1観点乃至第3観点のいずれか一つに記載の樹脂組成物、
第5観点として、マイクロレンズ用である第1観点乃至第4観点のいずれか一つに記載の樹脂組成物、
第6観点として、平坦化膜用である第1観点乃至第4観点のいずれか一つに記載の樹脂組成物、
第7観点として、第1観点乃至第6観点のいずれか一つに記載の樹脂組成物から得られる硬化膜、
第8観点として、第5観点に記載の樹脂組成物から作製されるマイクロレンズ、
第9観点として、第6観点に記載の樹脂組成物から作製される平坦化膜に関する。
以上より、本発明の樹脂組成物から形成される膜は、その形成工程、又は配線等の周辺装置の形成工程において、高温での加熱処理が行われる場合にマイクロレンズが着色し、レンズ形状が変形する可能性を、著しく減少できる。また、本発明の樹脂組成物から樹脂層を形成しその上にレジストを塗布する場合、及びマイクロレンズ又は平坦化膜を形成後に電極、配線形成工程が行われる場合には、レジストとのミキシング、有機溶剤によるマイクロレンズ又は平坦化膜の変形及び剥離といった問題も著しく減少できる。したがって、本発明の樹脂組成物は、マイクロレンズ及び平坦化膜を形成する材料として好適である。
本発明の樹脂組成物に含まれる共重合体は、前述の式(1)、式(2)及び式(3)で表される構造単位を有する共重合体である。
ブロック剤としては、例えば、メタノール、エタノール、イソプロパノール、n-ブタノール、2-エトキシヘキサノール、2-N,N-ジメチルアミノエタノール、2-エトキシエタノール、シクロヘキサノール等のアルコール類、フェノール、o-ニトロフェノール、p-クロロフェノール、o-クレゾール、m-クレゾール、p-クレゾール等のフェノール類、ε-カプロラクタム等のラクタム類、アセトンオキシム、メチルエチルケトンオキシム、メチルイソブチルケトンオキシム、シクロヘキサノンオキシム、アセトフェノンオキシム、ベンゾフェノンオキシム等のオキシム類、ピラゾール、3,5-ジメチルピラゾール、3-メチルピラゾール等のピラゾール類、ドデカンチオール、ベンゼンチオール等のチオール類、マロン酸ジエステル、アセト酢酸エステル、マロン酸ジニトリル、アセチルアセトン、メチレンジスルホン、ジベンゾイルメタン、ジピバロイルメタン、アセトンジカルボン酸ジエステル等の活性メチレン系化合物類が挙げられる。
当該界面活性剤としては、例えば、ポリオキシエチレンラウリルエーテル、ポリオキシエチレンステアリルエーテル、ポリオキシエチレンセチルエーテル、ポリオキシエチレンオレイルエーテル等のポリオキシエチレンアルキルエーテル類、ポリオキシエチレンオクチルフェニルエーテル、ポリオキシエチレンノニルフェニルエーテル等のポリオキシエチレンアルキルアリールエーテル類、ポリオキシエチレン・ポリオキシプロピレンブロックコポリマー類、ソルビタンモノラウレート、ソルビタンモノパルミテート、ソルビタンモノステアレート、ソルビタンモノオレエート、ソルビタントリオレエート、ソルビタントリステアレート等のソルビタン脂肪酸エステル類、ポリオキシエチレンソルビタンモノラウレート、ポリオキシエチレンソルビタンモノパルミテート、ポリオキシエチレンソルビタンモノステアレート、ポリオキシエチレンソルビタントリオレエート、ポリオキシエチレンソルビタントリステアレート等のポリオキシエチレンソルビタン脂肪酸エステル類等のノニオン系界面活性剤、エフトップ〔登録商標〕EF301、同EF303、同EF352(以上、三菱マテリアル電子化成(株)製)、メガファック〔登録商標〕F-171、同F-173、同R-30(以上、DIC(株)製)、フロラードFC430、同FC431(以上、住友スリーエム(株)製)、アサヒガード〔登録商標〕AG710、サーフロン〔登録商標〕S-382、同SC101、同SC102、同SC103、同SC104、同SC105、同SC106(旭硝子(株)製)、FTX-206D、FTX-212D、FTX-218、FTX-220D、FTX-230D、FTX-240D、FTX-212P、FTX-220P、FTX-228P、FTX-240G等フタージェントシリーズ((株)ネオス製)等のフッ素系界面活性剤、オルガノシロキサンポリマーKP341(信越化学工業(株)製)を挙げることができる。これらの界面活性剤は、単独で使用しても、2種以上を組み合わせて使用してもよい。
基板(例えば、酸化珪素膜で被膜されたシリコン等の半導体基板、窒化珪素膜又は酸化窒化珪素膜で被膜されたシリコン等の半導体基板、窒化珪素基板、石英基板、ガラス基板(無アルカリガラス、低アルカリガラス、結晶化ガラスを含む)、ITO膜が形成されたガラス基板)上に、スピナー、コーター等の適当な塗布方法により本発明の樹脂組成物を塗布後、ホットプレート等の加熱手段を用いてベークして硬化させてマイクロレンズ用樹脂層を形成する。
〔下記合成例で得られた共重合体の重量平均分子量の測定〕
装置:日本分光(株)製GPCシステム
カラム:Shodex〔登録商標〕KL-804L及び803L
カラムオーブン:40℃
流量:1mL/分
溶離液:テトラヒドロフラン
<合成例1>
N-シクロヘキシルマレイミド20.0g、2-(O-[1’-メチルプロピリデンアミノ]カルボキシアミノ)エチルメタクリレート(カレンズ〔登録商標〕MOI-BM(昭和電工(株)製))20.3g、2-ヒドロキシエチルメタクリレート10.9g、及び2,2’-アゾビスイソブチロニトリル1.5gをプロピレングリコールモノメチルエーテル97.9gに溶解させた後、この溶液を、プロピレングリコールモノメチルエーテル25.1gを70℃に保持したフラスコ中に4時間かけて滴下した。滴下終了後、18時間反応させることにより、下記式(4)で表される構造単位を有する共重合体の溶液(固形分濃度30質量%)を得た。得られた共重合体の重量平均分子量Mwは11,000(ポリスチレン換算)であった。
N-フェニルマレイミド20.0g、2-(O-[1’-メチルプロピリデンアミノ]カルボキシアミノ)エチルメタクリレート(カレンズ〔登録商標〕MOI-BM(昭和電工(株)製))21.0g、2-ヒドロキシエチルメタクリレート11.3g、及び2,2’-アゾビスイソブチロニトリル1.6gをプロピレングリコールモノメチルエーテル100.0gに溶解させた後、この溶液を、プロピレングリコールモノメチルエーテル25.6gを70℃に保持したフラスコ中に4時間かけて滴下した。滴下終了後、18時間反応させることにより、下記式(5)で表される構造単位を有する共重合体の溶液(固形分濃度30質量%)を得た。得られた共重合体の重量平均分子量Mwは11,000(ポリスチレン換算)であった。
N-フェニルマレイミド20.0g、2-[(3,5-ジメチルピラゾリル)カルボニルアミノ]エチルメタクリレート(カレンズ〔登録商標〕MOI-BP(昭和電工(株)製))21.8g、2―ヒドロキシプロピルメタクリレート12.5g、及び2,2’-アゾビスイソブチロニトリル1.6gをプロピレングリコールモノメチルエーテル103.8gに溶解させた後、この溶液を、プロピレングリコールモノメチルエーテル26.6gを70℃に保持したフラスコ中に4時間かけて滴下した。滴下終了後、18時間反応させることにより、下記式(6)で表される構造単位を有する共重合体の溶液(固形分濃度30質量%)を得た。得られた共重合体の重量平均分子量Mwは15,000(ポリスチレン換算)であった。
N-メチルマレイミド15.0g、2-(O-[1’-メチルプロピリデンアミノ]カルボキシアミノ)エチルメタクリレート(カレンズ〔登録商標〕MOI-BM(昭和電工(株)製))24.5g、2-ヒドロキシエチルメタクリレート13.2g、及び2,2’-アゾビスイソブチロニトリル1.6gをプロピレングリコールモノメチルエーテル100.8gに溶解させた後、この溶液を、プロピレングリコールモノメチルエーテル25.9gを75℃に保持したフラスコ中に4時間かけて滴下した。滴下終了後、18時間反応させることにより、下記式(7)で表される構造単位を有する共重合体の溶液(固形分濃度30質量%)を得た。得られた共重合体の重量平均分子量Mwは9,000(ポリスチレン換算)であった。
スチレン36.0g、2-ヒドロキシエチルメタクリレート11.2g、及び2,2’-アゾビスイソブチロニトリル2.1gをプロピレングリコールモノメチルエーテル92.0gに溶解させた後、この溶液を、プロピレングリコールモノメチルエーテル24.0gを75℃に保持したフラスコ中に4時間かけて滴下した。滴下終了後、18時間反応させることにより、下記式(8)で表される構造単位を有する共重合体の溶液(固形分濃度30質量%)を得た。得られた共重合体の重量平均分子量Mwは13,000(ポリスチレン換算)であった。
スチレン26.0g、2-(O-[1’-メチルプロピリデンアミノ]カルボキシアミノ)エチルメタクリレート(カレンズ〔登録商標〕MOI-BM(昭和電工(株)製))25.9g、及び2,2’-アゾビスイソブチロニトリル1.8gをプロピレングリコールモノメチルエーテルアセテート100.0gに溶解させた後、この溶液を、プロピレングリコールモノメチルエーテルアセテート25.6gを75℃に保持したフラスコ中に4時間かけて滴下した。滴下終了後、18時間反応させることにより、下記式(9)で表される構造単位を有する共重合体の溶液(固形分濃度30質量%)を得た。得られた共重合体の重量平均分子量Mwは12,000(ポリスチレン換算)であった。
N-シクロヘキシルマレイミド26.0g、2-ヒドロキシエチルメタクリレート28.3g、及び2,2’-アゾビスイソブチロニトリル1.6gをプロピレングリコールモノメチルエーテル103.9gに溶解させた後、この溶液を、プロピレングリコールモノメチルエーテル26.6gを70℃に保持したフラスコ中に4時間かけて滴下した。滴下終了後、18時間反応させることにより、下記式(10)で表される構造単位を有する共重合体の溶液(固形分濃度30質量%)を得た。得られた共重合体の重量平均分子量Mwは11,000(ポリスチレン換算)であった。
N-シクロヘキシルマレイミド20.0g、2-(O-[1’-メチルプロピリデンアミノ]カルボキシアミノ)エチルメタクリレート(カレンズ〔登録商標〕MOI-BM(昭和電工(株)製))40.6g、及び2,2’-アゾビスイソブチロニトリル1.8gをプロピレングリコールモノメチルエーテルアセテート115.8gに溶解させた後、この溶液を、プロピレングリコールモノメチルエーテルアセテート29.7gを70℃に保持したフラスコ中に4時間かけて滴下した。滴下終了後、18時間反応させることにより、下記式(11)で表される構造単位を有する共重合体の溶液(固形分濃度30質量%)を得た。得られた共重合体の重量平均分子量Mwは12,000(ポリスチレン換算)であった。
<実施例1>
合成例1で得られた共重合体の溶液50.0g及び界面活性剤としてメガファック〔登録商標〕R-30(DIC(株)製)0.03gを、乳酸エチル15.0gに溶解させて溶液とした。その後、孔径0.10μmのポリエチレン製ミクロフィルターを用いてろ過して樹脂組成物を調製した。
合成例2で得られた共重合体の溶液50.0g及び界面活性剤としてメガファック〔登録商標〕R-30(DIC(株)製)0.03gを、乳酸エチル15.0gに溶解させて溶液とした。その後、孔径0.10μmのポリエチレン製ミクロフィルターを用いてろ過して樹脂組成物を調製した。
合成例3で得られた共重合体の溶液50.0g及び界面活性剤としてメガファック〔登録商標〕R-30(DIC(株)製)0.03gを、乳酸エチル15.0gに溶解させて溶液とした。その後、孔径0.10μmのポリエチレン製ミクロフィルターを用いてろ過して樹脂組成物を調製した。
合成例4で得られた共重合体の溶液50.0g及び界面活性剤としてメガファック〔登録商標〕R-30(DIC(株)製)0.03gを、乳酸エチル15.0gに溶解させて溶液とした。その後、孔径0.10μmのポリエチレン製ミクロフィルターを用いてろ過して樹脂組成物を調製した。
合成例5で得られた共重合体の溶液50.0g及び界面活性剤としてメガファック〔登録商標〕R-30(DIC(株)製)0.03gを、プロピレングリコールモノメチルエーテル1.1g及びプロピレングリコールモノメチルエーテルアセテート9.0gに溶解させて溶液とした。その後、孔径0.10μmのポリエチレン製ミクロフィルターを用いてろ過して樹脂組成物を調製した。
合成例6で得られた共重合体の溶液50.0g及び界面活性剤としてメガファック〔登録商標〕R-30(DIC(株)製)0.03gを、プロピレングリコールモノメチルエーテルアセテート3.6gに溶解させて溶液とした。その後、孔径0.10μmのポリエチレン製ミクロフィルターを用いてろ過して樹脂組成物を調製した。
合成例7で得られた共重合体の溶液50.0g及び界面活性剤としてメガファック〔登録商標〕R-30(DIC(株)製)0.03gを、プロピレングリコールモノメチルエーテル1.1g及び乳酸エチル9.0gに溶解させて溶液とした。その後、孔径0.10μmのポリエチレン製ミクロフィルターを用いてろ過して樹脂組成物を調製した。
合成例8で得られた共重合体の溶液50.0g及び界面活性剤としてメガファック〔登録商標〕R-30(DIC(株)製)0.03gを、プロピレングリコールモノメチルエーテルアセテート3.6gに溶解させて溶液とした。その後、孔径0.10μmのポリエチレン製ミクロフィルターを用いてろ過して樹脂組成物を調製した。
実施例1乃至実施例4、比較例1乃至比較例4で調製した樹脂組成物をそれぞれ、シリコンウエハー上にスピンコーターを用いて塗布し、ホットプレート上において100℃で1分間、さらに200℃で5分間ベークを行い、膜厚2μmの膜を形成した。これらの膜に対して、プロピレングリコールモノメチルエーテル、プロピレングリコールモノメチルエーテルアセテート、乳酸エチル、3-エトキシプロピオン酸エチル、アセトン、2-ヘプタノン、2-プロパノール、γ-ブチロラクトン及び2.38質量%濃度の水酸化テトラメチルアンモニウム(TMAH)水溶液に、それぞれ23℃の温度条件下、5分間浸漬する試験を行った。浸漬前後において膜厚変化を測定し、上記浸漬溶剤のうち1つでも、浸漬前の膜厚に対して5%以上の膜厚増減があった場合は“×”、全ての溶剤について膜厚増減が5%未満であった場合は“○”として耐溶剤性を評価した。評価結果を表1に示す。
実施例1乃至実施例4で調製した樹脂組成物をそれぞれ、石英基板上にスピンコーターを用いて塗布し、ホットプレート上において100℃で1分間、さらに200℃で5分間ベークを行い、膜厚2μmの膜を形成した。これらの膜を紫外線可視分光光度計UV-2550((株)島津製作所製)を用いて波長400nmの透過率を測定した。さらにこの膜を260℃で5分間加熱した後、波長400nmの透過率を測定した。評価結果を表1に示す。
ドライエッチングレートの測定に用いたエッチャー及びエッチングガスは以下のものを用いた。
エッチャー:RIE-10NR(サムコ(株)製)
エッチングガス:CF4
実施例1乃至実施例4で調製した樹脂組成物をそれぞれ、35℃(加速試験)にて3週間保管し、調製直後の粘度と比較して、粘度変化が10%未満であるものを“○”、10%以上であるものを“×”とした。評価結果を表1に示す。
実施例1乃至実施例4で調製した樹脂組成物を、それぞれ高さ0.5μm、ライン幅30μm、ライン間スペース30μmの段差基板上にスピンコーターを用いて塗布し、ホットプレート上において100℃で1分間、さらに200℃で5分間ベークを行い、膜厚2μmの膜を形成した。図1に示すh1(段差基板の段差)とh2(硬化膜の膜厚差)から、“式:(1-(h2/h1))×100”を用いて平坦化率を求めた。評価結果を表1に示す。
2:硬化膜
3:ライン幅
4:ライン間スペース
h1:段差基板の段差
h2:硬化膜の膜厚差
Claims (9)
- 下記式(1)、式(2)及び式(3)で表される構造単位を有する共重合体及び溶剤を含有する樹脂組成物。
- 前記共重合体の重量平均分子量は1,000乃至50,000である、請求項1乃至請求項3のいずれか一項に記載の樹脂組成物。
- マイクロレンズ用である請求項1乃至請求項4のいずれか一項に記載の樹脂組成物。
- 平坦化膜用である請求項1乃至請求項4のいずれか一項に記載の樹脂組成物。
- 請求項1乃至請求項6のいずれか一項に記載の樹脂組成物から得られる硬化膜。
- 請求項5に記載の樹脂組成物から作製されるマイクロレンズ。
- 請求項6に記載の樹脂組成物から作製される平坦化膜。
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JP (1) | JP5737538B2 (ja) |
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CN (1) | CN103717630B (ja) |
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Cited By (2)
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JP2015199939A (ja) * | 2014-03-31 | 2015-11-12 | 三井化学株式会社 | 樹脂組成物およびその用途 |
KR20160113593A (ko) | 2014-01-30 | 2016-09-30 | 닛산 가가쿠 고교 가부시키 가이샤 | 마이크로렌즈 형성용 수지 조성물 |
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JP6963215B2 (ja) * | 2016-07-28 | 2021-11-05 | 日産化学株式会社 | 樹脂組成物 |
CN112689862A (zh) * | 2018-09-06 | 2021-04-20 | 株式会社钟化 | 分隔壁的制造方法、图像显示装置及其制造方法 |
CN112969682B (zh) * | 2018-11-09 | 2023-09-26 | 株式会社尼康 | 化合物、树脂前驱体、固化物、光学元件、光学系统 |
JP2020132749A (ja) * | 2019-02-19 | 2020-08-31 | メルク、パテント、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツングMerck Patent GmbH | ポリマー、ポリマーを含んでなる半導体組成物、および半導体組成物を用いた膜の製造方法 |
WO2021132383A1 (ja) * | 2019-12-25 | 2021-07-01 | 日産化学株式会社 | 剥離層形成用組成物及び剥離層 |
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JP4591351B2 (ja) * | 2003-07-28 | 2010-12-01 | 日産化学工業株式会社 | ポジ型感光性樹脂組成物 |
TWI407157B (zh) * | 2004-06-25 | 2013-09-01 | Fujifilm Corp | 光學補償膜、其製法、及偏光板、以及使用它之液晶顯示器 |
EP2472293B1 (en) * | 2009-08-24 | 2016-06-29 | Nissan Chemical Industries, Ltd. | Photosensitive resin composition for microlens |
KR101754676B1 (ko) * | 2010-02-02 | 2017-07-06 | 닛산 가가쿠 고교 가부시키 가이샤 | 포지티브형 감광성 수지 조성물 및 발액성 피막 |
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- 2012-08-27 WO PCT/JP2012/071582 patent/WO2013035569A1/ja active Application Filing
- 2012-08-27 KR KR1020147006221A patent/KR101626472B1/ko active IP Right Grant
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JP2007072412A (ja) * | 2005-09-09 | 2007-03-22 | Hitachi Chem Co Ltd | 着色組成物、感光性着色樹脂組成物、着色画像形成用感光液、着色画像の製造法、カラーフィルタの製造法及びカラーフィルタ |
JP2007169601A (ja) * | 2005-11-22 | 2007-07-05 | Asahi Glass Co Ltd | 撥油性組成物および該撥油性組成物からなる膜を有する物品 |
WO2012073742A1 (ja) * | 2010-11-30 | 2012-06-07 | 日産化学工業株式会社 | マイクロレンズ用感光性樹脂組成物 |
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KR20160113593A (ko) | 2014-01-30 | 2016-09-30 | 닛산 가가쿠 고교 가부시키 가이샤 | 마이크로렌즈 형성용 수지 조성물 |
JP2015199939A (ja) * | 2014-03-31 | 2015-11-12 | 三井化学株式会社 | 樹脂組成物およびその用途 |
Also Published As
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US20140200304A1 (en) | 2014-07-17 |
KR20140057320A (ko) | 2014-05-12 |
TWI534160B (zh) | 2016-05-21 |
US9029467B2 (en) | 2015-05-12 |
CN103717630B (zh) | 2016-08-24 |
CN103717630A (zh) | 2014-04-09 |
JP5737538B2 (ja) | 2015-06-17 |
JPWO2013035569A1 (ja) | 2015-03-23 |
TW201326222A (zh) | 2013-07-01 |
KR101626472B1 (ko) | 2016-06-01 |
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