WO2016021348A1 - 平坦化膜用又はマイクロレンズ用樹脂組成物 - Google Patents
平坦化膜用又はマイクロレンズ用樹脂組成物 Download PDFInfo
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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
- C08F212/00—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 an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by heteroatoms or groups containing heteroatoms
- C08F212/22—Oxygen
- C08F212/24—Phenols or alcohols
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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
- C08F12/00—Homopolymers and 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 an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by hetero atoms or groups containing heteroatoms
- C08F12/22—Oxygen
- C08F12/24—Phenols or alcohols
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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
- C08F212/00—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 an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—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 an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by heteroatoms or groups containing heteroatoms
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
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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
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/14—Copolymers of styrene with unsaturated esters
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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
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
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- 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
- C09D125/00—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 an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/18—Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen
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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
- C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
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- 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
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- 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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/094—Multilayer resist systems, e.g. planarising layers
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- 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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
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- 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
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- 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
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- G03F7/30—Imagewise removal using liquid means
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- G—PHYSICS
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/38—Treatment before imagewise removal, e.g. prebaking
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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
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/32—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
- C08F220/325—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals containing glycidyl radical, e.g. glycidyl (meth)acrylate
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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
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- G—PHYSICS
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- 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
Definitions
- the present invention relates to a thermosetting planarizing film or microlens resin composition, a planarizing film manufacturing method and a microlens manufacturing method using the resin composition.
- An etch back method is known as one of methods for producing a microlens for a CCD / CMOS image sensor (Patent Documents 5 and 6). That is, a resist pattern is formed on the microlens resin film formed on the color filter, 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 underlying microlens resin film is etched back, and the lens pattern shape is transferred to the microlens resin film to produce a microlens.
- Patent Document 7 a technique of using a dye instead of the pigment dispersion system has been proposed.
- Patent Document 8 since the conventional thermosetting protective film is baked at a temperature of 180 ° C. or higher, it is generally difficult to apply it on a color filter using a dye whose decomposition starts at about 180 ° C.
- the problem to be solved is a heat which is excellent in transparency, solvent resistance and flatness and can be cured at a desired temperature higher than 100 ° C. It is to provide a curable resin composition.
- R 0 independently represents a hydrogen atom or a methyl group, R 1 represents a single bond or an alkylene group having 1 to 5 carbon atoms, and the alkylene group has an ether bond in its main chain
- R 2 represents an epoxy group or an organic group having 5 to 12 carbon atoms having an epoxy ring.
- the structural unit represented by the formula (1) is represented by the following formula (1-1) or formula (1-2), for the planarizing film or microlens according to the first aspect Resin composition.
- R 0 represents a hydrogen atom or a methyl group
- R 1 represents a single bond or an alkylene group having 1 to 5 carbon atoms
- the alkylene group may have an ether bond in its main chain.
- the copolymer is a copolymer having a structural unit represented by the following formula (3), and the resin composition for a planarizing film or microlens according to the first aspect or the second aspect. object.
- R 0 represents a hydrogen atom or a methyl group
- R 3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cyano group, a carboxyl group, a phenyl group, or Represents a halogeno group.
- the resin composition for a planarizing film or microlens according to any one of the first aspect to the third aspect further containing a catalyst that promotes the curing of the copolymer.
- the catalyst is any one of the first aspect to the fourth aspect, which is included in an amount of 0.1% by mass to 20% by mass based on the content in the solid content excluding the solvent from the resin composition.
- the method for producing a planarizing film according to the seventh aspect wherein a color filter is formed on the substrate, and the resin composition is applied on the color filter.
- the resin composition according to any one of the first to sixth aspects is applied on a substrate on which a color filter is formed, and baked at a temperature higher than 100 ° C. and lower than 180 ° C. Forming a resist pattern on the resin film, reflowing the resist pattern to form a lens pattern, and etching back the resin film using the lens pattern as an etching mask.
- the copolymer contained in the composition is a self-crosslinking type having an epoxy group or an epoxy ring and a hydroxy group, it is not always necessary to add a crosslinking agent. It has a thermosetting property at a desired temperature lower than 180 ° C., for example, 140 ° C. Furthermore, the resin film formed from the resin composition of the present invention has excellent transparency, solvent resistance, and flatness. As mentioned above, the level
- the resin composition of the present invention is suitable as a material for forming a planarizing film and a microlens.
- FIG. 1 is a schematic view showing a resin film formed by applying and baking the resin composition of the present invention on a stepped substrate.
- 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 following formula (1) and a structural unit represented by formula (2).
- R 0 independently represents a hydrogen atom or a methyl group
- R 1 represents a single bond or an alkylene group having 1 to 5 carbon atoms
- the alkylene group has an ether bond in its main chain
- R 2 represents an epoxy group or an organic group having 5 to 12 carbon atoms having an epoxy ring.
- Examples of the formula (1) include structural units represented by the following formula (1-1) or formula (1-2). (Wherein R 0 represents a hydrogen atom or a methyl group, and R 1 represents a single bond or an alkylene group having 1 to 5 carbon atoms.)
- the copolymer may be a copolymer having a structural unit represented by the following formula (3).
- R 0 represents a hydrogen atom or a methyl group
- R 3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cyano group, a carboxyl group, a phenyl group, or Represents a halogeno group.
- Specific examples of the compound (monomer) forming the structural unit represented by the formula (3) include styrene, ⁇ -methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 4-tert- Examples thereof include butylstyrene, 4-methoxystyrene, 4-cyanostyrene, 4-vinylbenzoic acid, 4-vinylbiphenyl, 4-fluorostyrene, 4-chlorostyrene, and 4-bromostyrene. These compounds may be used alone or in combination of two or more.
- the content of the structural unit represented by the above formula (1) is, for example, 10 mol% to 90 mol%, preferably 20 mol% to 70 mol%.
- the content of the structural unit represented by the above formula (2) is, for example, 10 mol% to 90 mol%, preferably 20 mol% to 80 mol%.
- the content thereof is, for example, 10 mol% to 90 mol%, preferably 20 mol% to 70 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.
- the method for obtaining the copolymer is not particularly limited, but generally, the monomer mixture containing the monomer species used for obtaining the above-mentioned copolymer is usually 50 to 120 ° C. in a polymerization solvent. It can be obtained by polymerizing at a temperature. 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 reduced pressure at room temperature or by 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 catalyst contained in the resin composition of the present invention is a catalyst for accelerating the curing of the copolymer, and may be referred to as a curing accelerating catalyst or a curing accelerating agent.
- -7 and organic acid salts thereof, imidazoles, phosphines and phosphonium salts are used.
- Examples of commercially available curing accelerating catalysts include DBU (registered trademark), U-CAT (registered trademark) SA 1, U-CAT (registered trademark) SA 102, U-CAT (registered trademark) SA 106, U-CAT. [Registered Trademark] SA 506, U-CAT [Registered Trademark] SA 603 (San Apro Co., Ltd.), Curesol [Registered Trademark] 2E4MZ (Shikoku Chemicals Co., Ltd.), Hokuko TPP [Registered Trademark], TPP -MK (registered trademark) (above, manufactured by Hokuko Chemical Co., Ltd.). These curing accelerating catalysts can be used alone or in combination of two or more.
- the content of the curing accelerating catalyst in the resin composition of the present invention is usually 0.1% by mass to 20% by mass based on the content in the solid content of the resin composition.
- the method for preparing the resin composition of the present invention is not particularly limited.
- a method in which the copolymer is dissolved in a solvent, and the curing accelerating catalyst is mixed with the solution at a predetermined ratio to obtain a uniform solution can be mentioned.
- a method in which other additives are further added and mixed as necessary there may be mentioned.
- the solvent is not particularly limited as long as it dissolves the copolymer and the curing accelerating catalyst.
- 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
- phageent series (manufactured by Neos Co., Ltd.) and organosiloxane polymer KP341 (manufactured by Shin-Etsu Chemical Co., Ltd.). These surfactants may be used alone or in combination of two or more.
- the content in the resin composition of the present invention is 0.001% by mass to 3% by mass based on the content in the solid content of the resin composition. Preferably, it is 0.01 mass% to 1 mass% or less, More preferably, it is 0.05 mass% to 0.5 mass% or less.
- the resin composition of the present invention may contain additives such as a crosslinking agent, an ultraviolet absorber, a sensitizer, a plasticizer, an antioxidant, and an adhesion aid as long as the effects of the present invention are not impaired. Can be included.
- Substrate for example, a semiconductor substrate such as silicon covered with a silicon oxide film, a semiconductor substrate such as silicon covered with a silicon nitride film or a silicon oxynitride film, a semiconductor substrate such as silicon provided with a color filter, a silicon nitride substrate , Quartz substrate, glass substrate (including alkali-free glass, low alkali glass, crystallized glass), glass substrate on which ITO film is formed ⁇ on the resin composition of the present invention by an appropriate coating method such as a spinner or a coater. After the coating, a flattening film or a microlens resin film is formed by baking and curing using a heating means such as a hot plate.
- a heating means such as a hot plate.
- the baking conditions are appropriately selected from baking temperatures of 80 ° C. to 300 ° C. and baking times of 0.3 minutes to 60 minutes. Further, two or more steps may be performed at different baking temperatures within the above temperature range. In the case of the resin composition of the present invention, a desired resin film can be formed at a baking temperature of less than 180 ° C.
- the film thickness of the resin 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 solution is applied onto the resin film for microlenses formed from the resin composition of the present invention, exposed through a predetermined mask, and post-exposure heating (PEB) is performed as necessary, followed by alkali development, rinsing And a predetermined resist pattern is formed by drying.
- PEB post-exposure heating
- g-line, i-line, KrF excimer laser, ArF excimer laser can be used.
- the resist pattern is reflowed to form a lens pattern by heat treatment (usually at a temperature not exceeding 200 ° C.).
- heat treatment usually at a temperature not exceeding 200 ° C.
- the underlying microlens resin film is etched back, and the lens pattern shape is transferred to the microlens resin film to produce a microlens.
- Example 1 ⁇ Example 1 to Example 3 and Comparative Example 1>
- a copolymer, a crosslinking agent, a curing accelerating catalyst, a surfactant and a solvent were mixed to obtain a uniform solution.
- Example 1 does not use a crosslinking agent and a curing acceleration catalyst
- Example 2 does not use a crosslinking agent
- Example 3 does not use a crosslinking agent and a crosslinking acceleration catalyst. Then, it filtered using the polyethylene micro filter with the hole diameter of 0.10 micrometer, and prepared the resin composition.
- the film thickness change was measured before and after immersion, and even if one of the above immersion solvents had a film thickness increase or decrease of 5% or more with respect to the film thickness before immersion, the film thickness increased or decreased for all the solvents. Was less than 5%, the solvent resistance was evaluated as “ ⁇ ”. The evaluation results are shown in Table 2.
- Step flatness The resin composition prepared in Examples 1 to 3 was applied on a stepped substrate (see FIG. 1) having a height of 0.3 ⁇ m, a line width of 10 ⁇ m, and a space between lines of 10 ⁇ m using a spin coater, and a hot plate Above, baking was performed at 100 ° C. for 1 minute and further at 140 ° C. for 10 minutes to form a resin film having a thickness of 0.6 ⁇ m. From h1 (step difference of the stepped substrate 1) and h2 (step difference of the resin film 2, that is, the height difference between the height of the resin film on the line and the height of the resin film on the space) shown in FIG. The flattening rate was determined using (h2 / h1)) ⁇ 100 ′′. The evaluation results are shown in Table 2.
- each of the resin compositions prepared in Examples 1 to 3 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 140 ° C. for 10 minutes. A 0.6 ⁇ m resin film was formed. Using the etcher and the etching gas, the dry etching rate of these films was measured. Similarly, a resist solution (THMR-iP1800 (manufactured by Tokyo Ohka Kogyo Co., Ltd.)) was applied on a silicon wafer using a spin coater, and baked on a hot plate at 90 ° C. for 1.5 minutes to obtain a film thickness of 1 ⁇ m. Then, the dry etching rate was measured, and the dry etching rate ratio of the film prepared from the resin composition prepared in Example 1 to Example 3 with respect to the resist film was determined. Is shown in Table 2.
- Step substrate 2 Resin film 3: Line width 4: Space between lines h1: Step difference of step substrate h2: Step of resin film
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Abstract
Description
すなわち、第1観点として、下記式(1)で表される構造単位および式(2)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平坦化膜用又はマイクロレンズ用樹脂組成物。
(式中、R0はそれぞれ独立に水素原子又はメチル基を表し、R1は単結合又は炭素原子数1乃至5のアルキレン基を表し、当該アルキレン基はその主鎖にエーテル結合を有してもよく、R2はエポキシ基、又はエポキシ環を有する炭素原子数5乃至12の有機基を表す。)
第2観点として、前記式(1)で表される構造単位は下記式(1-1)又は式(1-2)で表される、第1観点に記載の平坦化膜用又はマイクロレンズ用樹脂組成物。
(式中、R0は水素原子又はメチル基を表し、R1は単結合又は炭素原子数1乃至5のアルキレン基を表し、当該アルキレン基はその主鎖にエーテル結合を有してもよい。)
第3観点として、前記共重合体はさらに下記式(3)で表される構造単位を有する共重合体である、第1観点又は第2観点に記載の平坦化膜用又はマイクロレンズ用樹脂組成物。
(式中、R0は水素原子又はメチル基を表し、R3は水素原子、炭素原子数1乃至10のアルキル基、炭素原子数1乃至10のアルコキシ基、シアノ基、カルボキシル基、フェニル基又はハロゲノ基を表す。)
第4観点として、前記共重合体の硬化を促進させる触媒をさらに含有する、第1観点乃至第3観点のいずれか一に記載の平坦化膜用又はマイクロレンズ用樹脂組成物。
第5観点として、前記触媒は、前記樹脂組成物から前記溶剤を除いた固形分中の含有量に基づいて0.1質量%乃至20質量%含まれる、第1観点乃至第4観点のいずれか一に記載の平坦化膜用又はマイクロレンズ用樹脂組成物。
第6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5観点のいずれか一に記載の平坦化膜用又はマイクロレンズ用樹脂組成物。
第7観点として、第1観点乃至第6観点のいずれか一に記載の樹脂組成物を基板上に塗布し、100℃よりも高く180℃未満の温度でベークして作製される平坦化膜。
第8観点として、前記基板上にカラーフィルターが形成され、該カラーフィルター上に前記樹脂組成物が塗布される、第7観点に記載の平坦化膜の作製方法。
第9観点として、第1観点乃至第6観点のいずれか一に記載の樹脂組成物をカラーフィルターが形成された基板上に塗布し、100℃よりも高く180℃未満の温度でベークし樹脂膜を形成し、前記樹脂膜上にレジストパターンを形成し、前記レジストパターンをリフローしてレンズパターンを形成し、前記レンズパターンをエッチングマスクとして前記樹脂膜をエッチバックする、マイクロレンズの作製方法。
本発明の樹脂組成物に含まれる共重合体は、前述の下記式(1)で表される構造単位および式(2)で表される構造単位を有する共重合体である。
(式中、R0はそれぞれ独立に水素原子又はメチル基を表し、R1は単結合又は炭素原子数1乃至5のアルキレン基を表し、当該アルキレン基はその主鎖にエーテル結合を有してもよく、R2はエポキシ基、又はエポキシ環を有する炭素原子数5乃至12の有機基を表す。)
(式中、R0は水素原子又はメチル基を表し、R3は水素原子、炭素原子数1乃至10のアルキル基、炭素原子数1乃至10のアルコキシ基、シアノ基、カルボキシル基、フェニル基又はハロゲノ基を表す。)
本発明の樹脂組成物に含まれる触媒は前記共重合体の硬化を促進させる触媒であり、硬化促進触媒又は硬化促進剤と称する場合もあり、1,8-ジアザビシクロ[5.4.0]ウンデセン-7およびその有機酸塩、イミダゾール類、ホスフィン類、ホスホニウム塩が用いられる。
基板{例えば、酸化珪素膜で被覆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覆されたシリコン等の半導体基板、カラーフィルターが形成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平坦化膜又はマイクロレンズ用樹脂膜を形成する。
[下記表1に記載し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〕KF-804L及びKF-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
以下の実施例で用いる略称の意味は、次の通りである。
GMA:グリシジルメタクリレート
4-HS:4-ヒドロキシスチレン
St:スチレン
TPP:トリフェニルホスフィン
jER828:三菱化学(株)製エポキシ樹脂 jER〔登録商標〕828(商品名)
DFX-18:(株)ネオス製界面活性剤 フタージェント〔登録商標〕DFX-18(商品名)
PGME:プロピレングリコールモノメチルエーテル
PGMEA:プロピレングリコールモノメチルエーテルアセテート
次の表1に示す組成に従い、共重合体、架橋剤、硬化促進触媒、界面活性剤及び溶剤を混合して均一な溶液とした。なお、実施例1は架橋剤及び硬化促進触媒を使用せず、実施例2は架橋剤を使用せず、実施例3は架橋剤及び架橋促進触媒を使用していない。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3及び比較例1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140℃で10分間ベークを行い、膜厚0.6μmの樹脂膜を形成した。これらの樹脂膜に対して、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、シクロヘキサノン、乳酸エチル、酢酸ブチル、アセトン、γ-ブチロラクトン、メチルエチルケトン、2-ヘプタノン、2-プロパノール、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2に示す。
実施例1乃至実施例3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140℃で10分間ベークを行い、膜厚0.6μmの樹脂膜を形成した。これらの樹脂膜に対し、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。評価結果を表2に示す。
実施例1乃至実施例3で調製した直後の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140℃で10分間ベークを行うことにより樹脂膜を形成し、光干渉式膜厚測定装置ラムダエースVM-2110(大日本スクリーン製造(株)製)を用いてこれらの樹脂膜の膜厚を測定した。さらに、同じ樹脂組成物を35℃(加速試験)にて1ヶ月保管し、保管後の樹脂組成物から同様の方法にて形成した樹脂膜の膜厚を測定した。調製直後の樹脂組成物から形成した樹脂膜の膜厚と比較して、膜厚変化が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2に示す。
実施例1乃至実施例3で調製した樹脂組成物を、それぞれ高さ0.3μm、ライン幅10μm、ライン間スペース10μmの段差基板(図1参照)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140℃で10分間ベークを行い、膜厚0.6μmの樹脂膜を形成した。図1に示すh1(段差基板1の段差)とh2(樹脂膜2の段差、即ちライン上の樹脂膜の高さとスペース上の樹脂膜の高さとの高低差)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2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、以下の通りである。
エッチャー:RIE-10NR(サムコ(株)製)
エッチングガス:CF4
2:樹脂膜
3:ライン幅
4:ライン間スペース
h1:段差基板の段差
h2:樹脂膜の段差
Claims (9)
- 前記共重合体の硬化を促進させる触媒をさらに含有する、請求項1乃至請求項3のいずれか一項に記載の平坦化膜用又はマイクロレンズ用樹脂組成物。
- 前記触媒は、前記樹脂組成物から前記溶剤を除いた固形分中の含有量に基づいて0.1質量%乃至20質量%含まれる、請求項1乃至請求項4のいずれか一項に記載の平坦化膜用又はマイクロレンズ用樹脂組成物。
- 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5のいずれか一項に記載の平坦化膜用又はマイクロレンズ用樹脂組成物。
- 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を基板上に塗布し、100℃よりも高く180℃未満の温度でベークする平坦化膜の作製方法。
- 前記基板上にカラーフィルターが形成され、該カラーフィルター上に前記樹脂組成物が塗布される、請求項7に記載の平坦化膜の作製方法。
- 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をカラーフィルターが形成された基板上に塗布し、100℃よりも高く180℃未満の温度でベークし樹脂膜を形成し、前記樹脂膜上にレジストパターンを形成し、前記レジストパターンをリフローしてレンズパターンを形成し、前記レンズパターンをエッチングマスクとして前記樹脂膜をエッチバックする、マイクロレンズの作製方法。
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CN106663627B (zh) | 2020-06-09 |
TW201609932A (zh) | 2016-03-16 |
CN106663627A (zh) | 2017-05-10 |
TWI736521B (zh) | 2021-08-21 |
US20170166737A1 (en) | 2017-06-15 |
KR102281050B1 (ko) | 2021-07-23 |
KR20170041665A (ko) | 2017-04-17 |
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