WO2015060238A1 - ポジ型感光性樹脂組成物 - Google Patents
ポジ型感光性樹脂組成物 Download PDFInfo
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- WO2015060238A1 WO2015060238A1 PCT/JP2014/077815 JP2014077815W WO2015060238A1 WO 2015060238 A1 WO2015060238 A1 WO 2015060238A1 JP 2014077815 W JP2014077815 W JP 2014077815W WO 2015060238 A1 WO2015060238 A1 WO 2015060238A1
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- photosensitive resin
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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
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
- G03F7/0392—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition
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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
- G03F7/022—Quinonediazides
- G03F7/023—Macromolecular quinonediazides; Macromolecular additives, e.g. binders
- G03F7/0233—Macromolecular quinonediazides; Macromolecular additives, e.g. binders characterised by the polymeric binders or the macromolecular additives other than the macromolecular quinonediazides
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133345—Insulating layers
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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
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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
- G03F7/022—Quinonediazides
- G03F7/0226—Quinonediazides characterised by the non-macromolecular additives
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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
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/124—Insulating layers formed between TFT elements and OLED elements
Definitions
- the present invention relates to a positive photosensitive resin composition and a cured film obtained therefrom. More specifically, the present invention relates to a positive photosensitive resin composition suitable for use in display materials, a cured film thereof, and various materials using the cured film.
- a patterned electrode protective film As a material for forming these films, among the photosensitive resin compositions, there are photosensitive resin compositions having a feature that the number of steps for obtaining a required pattern shape is small and sufficient flatness is provided. It is widely used than before.
- Patent Literature 1 and 2
- the pattern shape tends to change depending on the baking temperature during post-baking, and precise temperature control is required.
- the formed pattern can be thermally crosslinked and cured. It has been proposed (Patent Document 3). However, the document 3 does not describe that the dimensional stability of the pattern shape and the heat resistance after metal sputtering are improved by using a crosslinkable compound having a specific structure.
- the present invention has been made in view of the above circumstances, and can be formed with high sensitivity while maintaining adhesion during development, and the cured film can be used during post-baking while maintaining high level flattening performance.
- An object of the present invention is to provide a positive photosensitive resin composition that can form a cured film having a small shape change and high resistance to metal sputtering.
- a positive photosensitive resin composition containing the following component (A), component (B), component (C), component (D), and solvent (E).
- E Solvent.
- (A) The positive photosensitive resin composition according to 1 above, wherein the component is an alkali-soluble acrylic polymer having a number average molecular weight of 2,000 to 30,000 in terms of polystyrene. 3.
- component (G) the adhesion promoter is further contained in the positive photosensitive resin composition in an amount of 0.1 to 20 parts by mass with respect to 100 parts by mass of component (A).
- the positive photosensitive resin composition of the present invention can form a pattern with high sensitivity while maintaining adhesion during development, has a small change in shape over a wide baking temperature range during post-baking, and has high metal spatter resistance.
- a film can be formed.
- the photosensitive resin composition of the present invention is a positive photosensitive resin composition containing the following component (A), component (B), component (C), component (D), and solvent (E).
- E Solvent.
- a component is an alkali-soluble acrylic polymer.
- an acrylic polymer is obtained by homopolymerization or copolymerization using a monomer having an unsaturated double bond such as acrylic acid, methacrylic acid, acrylic ester, methacrylic ester, styrene, maleimide, and the like.
- a monomer having an unsaturated double bond such as acrylic acid, methacrylic acid, acrylic ester, methacrylic ester, styrene, maleimide, and the like.
- the alkali-soluble acrylic polymer of component (A) may be any alkali-soluble acrylic polymer, and is not particularly limited with respect to the main chain skeleton and side chain type of the polymer constituting the acrylic polymer.
- the number average molecular weight of the alkali-soluble acrylic polymer of the component (A) is excessively larger than 30,000, the planarization performance with respect to the step is lowered, while the number average molecular weight is less than 2,000. If it is too small, curing may be insufficient at the time of thermal curing and solvent resistance may be reduced. Therefore, the number average molecular weight is in the range of 2,000 to 30,000.
- the method for synthesizing the alkali-soluble acrylic polymer of component (A) includes copolymerizing a monomer having any of a carboxyl group, an acid anhydride group and a phenolic hydroxyl group with an alkali-soluble monomer such as maleimide.
- the method to do is simple.
- Examples of the monomer having a carboxyl group include acrylic acid, methacrylic acid, crotonic acid, mono- (2- (acryloyloxy) ethyl) phthalate, mono- (2- (methacryloyloxy) ethyl) phthalate, and N- (carboxyphenyl).
- Examples of the monomer having an acid anhydride group include maleic anhydride and itaconic anhydride.
- Examples of the monomer having a phenolic hydroxyl group include p-hydroxystyrene, ⁇ -methyl-p-hydroxystyrene, N-hydroxyphenylmaleimide, N-hydroxyphenylacrylamide, N-hydroxyphenylmethacrylamide, 4-hydroxyphenyl methacrylate and the like. Is mentioned.
- the monomer which can be copolymerized with the monomer which has an alkali-soluble group can be used together.
- specific examples of such monomers include acrylic ester compounds, methacrylic ester compounds, N-substituted maleimide compounds, acrylamide compounds, acrylonitrile, styrene compounds and vinyl compounds.
- acrylic ester compounds methacrylic ester compounds, N-substituted maleimide compounds, acrylamide compounds, acrylonitrile, styrene compounds and vinyl compounds.
- acrylic ester compound examples include methyl acrylate, ethyl acrylate, isopropyl acrylate, benzyl acrylate, naphthyl acrylate, anthryl acrylate, anthryl methyl acrylate, phenyl acrylate, glycidyl acrylate, phenoxyethyl acrylate, 2,2,2- Trifluoroethyl acrylate, tert-butyl acrylate, cyclohexyl acrylate, isobornyl acrylate, 2-methoxyethyl acrylate, methoxytriethylene glycol acrylate, 2-ethoxyethyl acrylate, 2-aminoethyl acrylate, tetrahydrofurfuryl acrylate, 3-methoxy Butyl acrylate, 2-methyl-2-adamantyl acrylate, 2 Propyl-2-adamantyl acrylate, 8-methyl-8-tricyclodecyl acrylate,
- methacrylic acid ester compound examples include methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, benzyl methacrylate, naphthyl methacrylate, anthryl methacrylate, anthryl methyl methacrylate, phenyl methacrylate, glycidyl methacrylate, phenoxyethyl methacrylate, 2,2,2- Trifluoroethyl methacrylate, tert-butyl methacrylate, cyclohexyl methacrylate, isobornyl methacrylate, 2-methoxyethyl methacrylate, methoxytriethylene glycol methacrylate, 2-ethoxyethyl methacrylate, 2-aminomethyl methacrylate, tetrahydrofurfuryl methacrylate, 3-methoxy Butyl methacrylate, 2 Methyl-2-adamantyl methacrylate, ⁇ -butyl
- acrylamide compound examples include N-methylacrylamide, N-methylmethacrylamide, N, N-dimethylacrylamide, N, N-dimethylmethacrylamide, N-methoxymethylacrylamide, N-methoxymethylmethacrylamide, N-butoxy.
- methyl acrylamide and N-butoxymethyl methacrylamide examples include methyl acrylamide and N-butoxymethyl methacrylamide.
- vinyl compound examples include methyl vinyl ether, benzyl vinyl ether, cyclohexyl vinyl ether, vinyl naphthalene, vinyl anthracene, vinyl carbazole, allyl glycidyl ether, 3-ethenyl-7-oxabicyclo [4.1.0] heptane, 1,2 -Epoxy-5-hexene, 1,7-octadiene monoepoxide and the like.
- styrene compound examples include styrene, ⁇ -methylstyrene, chlorostyrene, bromostyrene, and the like.
- maleimide compound examples include maleimide, N-methylmaleimide, N-phenylmaleimide, and N-cyclohexylmaleimide.
- the alkali-soluble acrylic polymer used in the present invention has a small amount even if it does not have an epoxy group or has an epoxy group from the viewpoint of storage stability.
- the method for obtaining the alkali-soluble acrylic polymer used in the present invention is not particularly limited.
- a solvent in which an alkali-soluble monomer, another copolymerizable monomer, and a polymerization initiator coexist if desired 50 to 110 It can be obtained by carrying out a polymerization reaction at a temperature of ° C.
- the solvent used will not be specifically limited if it dissolves the monomer which comprises an alkali-soluble acrylic polymer, and the acrylic polymer which has a specific functional group.
- the solvent described in (E) solvent mentioned later is mentioned.
- the alkali-soluble acrylic polymer thus obtained is usually in the form of a solution dissolved in a solvent.
- the alkali-soluble monomer or other copolymerizable monomer a monomer having an epoxy group is not used at all, or the amount used is 100 moles of the total monomer used for polymerization. It is preferable to set it to 10 mol or less. Therefore, the alkali-soluble acrylic polymer used in the present invention is obtained without using any monomer having an epoxy group, or a monomer having a small amount of an epoxy group (based on 100 mol of all monomers used for polymerization). 10 mol or less) is preferable.
- the alkali-soluble acrylic polymer solution obtained as described above was re-precipitated by stirring with stirring such as diethyl ether or water, and the generated precipitate was filtered and washed, and then at normal pressure or reduced pressure.
- it can be set as the powder of an alkali-soluble acrylic polymer by drying at normal temperature or heat.
- the polymerization initiator and unreacted monomer coexisting with the alkali-soluble acrylic polymer can be removed, and as a result, a purified powder of the alkali-soluble acrylic polymer is obtained. If sufficient purification cannot be achieved by a single operation, the obtained powder may be redissolved in a solvent and the above operation may be repeated.
- the alkali-soluble acrylic polymer powder obtained above may be used as it is, or the powder may be redissolved, for example, in a solvent (E) described later and used as a solution.
- the acrylic polymer as the component (A) may be a mixture of a plurality of types of alkali-soluble acrylic polymers.
- the 1,2-quinonediazide compound as component (B) is a compound having either a hydroxyl group or an amino group, or both a hydroxyl group and an amino group, and these hydroxyl groups or amino groups (hydroxyl group and amino group). Of the total amount), preferably 10 to 100 mol%, particularly preferably 20 to 95 mol% of the compound esterified or amidated with 1,2-quinonediazidesulfonic acid Can be used.
- Examples of the compound having a hydroxyl group include phenol, o-cresol, m-cresol, p-cresol, hydroquinone, resorcinol, catechol, methyl gallate, ethyl gallate, 1,3,3-tris (4-hydroxyphenyl).
- Examples of the compound containing an amino group include aniline, o-toluidine, m-toluidine, p-toluidine, 4-aminodiphenylmethane, 4-aminodiphenyl, o-phenylenediamine, m-phenylenediamine, and p-phenylenediamine.
- Anilines such as 4,4′-diaminophenyl methane, 4,4′-diaminodiphenyl ether, and aminocyclohexane.
- examples of the compound containing both a hydroxyl group and an amino group include o-aminophenol, m-aminophenol, p-aminophenol, 4-aminoresorcinol, 2,3-diaminophenol, and 2,4-diaminophenol.
- 1,2-quinonediazide compounds can be used alone or in combination of two or more.
- the content of the component (B) in the positive photosensitive resin composition of the present invention is preferably 5 to 100 parts by weight, more preferably 8 to 50 parts by weight, more preferably 100 parts by weight of the component (A).
- the amount is preferably 10 to 40 parts by mass. When the amount is less than 5 parts by mass, the difference in dissolution rate between the exposed portion and the unexposed portion of the positive photosensitive resin composition in the developer becomes small, and patterning by development may be difficult. When the amount exceeds 100 parts by mass, the 1,2-quinonediazide compound is not sufficiently decomposed by exposure in a short time, so that the sensitivity is lowered, or the component (B) absorbs light and the transparency of the cured film. May be reduced.
- ⁇ (C) component examples of the compound (C) having an isocyanurate skeleton and two or more polymerizable unsaturated double bonds include trimethallyl isocyanurate, tris (2-acryloyloxyethyl) isocyanurate, and tris (2-methacryloyl). And oxyethyl) isocyanurate.
- the content of the component (C) in the positive photosensitive resin composition of the present invention is preferably 5 to 60 parts by mass, more preferably 10 to 50 parts by mass with respect to 100 parts by mass of the component (A). .
- the amount is less than 5 parts by mass, the adhesion during development may be insufficient, or the step flatness may be reduced.
- a sensitivity may fall or a residue may generate
- ⁇ (D) component When the crosslinkable compound having two or more substituents selected from the alkoxymethyl group and hydroxymethyl group of the component (D) is exposed to a high temperature during thermosetting, the crosslinking reaction proceeds by a dehydration condensation reaction.
- examples of such compounds include compounds such as alkoxymethylated glycoluril, alkoxymethylated benzoguanamine, and alkoxymethylated melamine, and phenoplast compounds.
- alkoxymethylated glycoluril examples include, for example, 1,3,4,6-tetrakis (methoxymethyl) glycoluril, 1,3,4,6-tetrakis (butoxymethyl) glycoluril, 1,3,4 , 6-tetrakis (hydroxymethyl) glycoluril, 1,3-bis (hydroxymethyl) urea, 1,1,3,3-tetrakis (butoxymethyl) urea, 1,1,3,3-tetrakis (methoxymethyl) Examples include urea, 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolinone, and 1,3-bis (methoxymethyl) -4,5-dimethoxy-2-imidazolinone.
- glycoluril compounds (trade names: Cymel (registered trademark) 1170, powder link (registered trademark) 1174) manufactured by Mitsui Cytec Co., Ltd., methylated urea resins (trade name: UFR (registered trademark)). 65), butylated urea resin (trade names: UFR (registered trademark) 300, U-VAN10S60, U-VAN10R, U-VAN11HV), urea / formaldehyde resin (high condensation type, manufactured by Dainippon Ink & Chemicals, Inc.) Trade name: Beccamin (registered trademark) J-300S, P-955, N) and the like.
- alkoxymethylated benzoguanamine examples include tetramethoxymethylbenzoguanamine.
- Commercially available products manufactured by Mitsui Cytec Co., Ltd. (trade name: Cymel (registered trademark) 1123), manufactured by Sanwa Chemical Co., Ltd. (trade names: Nicalac (registered trademark) BX-4000, BX-37, BL- 60, BX-55H) and the like.
- alkoxymethylated melamine examples include, for example, hexamethoxymethylmelamine.
- methoxymethyl type melamine compounds (trade names: Cymel (registered trademark) 300, 301, 303, 350) manufactured by Mitsui Cytec Co., Ltd., butoxymethyl type melamine compounds (trade name: My Coat (registered trademark)) 506, 508), methoxymethyl type melamine compound manufactured by Sanwa Chemical Co., Ltd.
- the component (D) may also be a compound obtained by condensing a melamine compound, urea compound, glycoluril compound and benzoguanamine compound in which a hydrogen atom of an amino group is substituted with a methylol group or an alkoxymethyl group.
- a melamine compound urea compound, glycoluril compound and benzoguanamine compound in which a hydrogen atom of an amino group is substituted with a methylol group or an alkoxymethyl group.
- the high molecular weight compound manufactured from the melamine compound and the benzoguanamine compound which are described in US Patent 6,323,310 is mentioned.
- Examples of commercially available products of the melamine compound include trade name: Cymel (registered trademark) 303 (manufactured by Mitsui Cytec Co., Ltd.).
- Examples of commercially available products of the benzoguanamine compound include product name: Cymel (registered trademark) 1123 ( Mitsui Cytec Co., Ltd.).
- phenoplast compounds include 2,6-bis (hydroxymethyl) phenol, 2,6-bis (hydroxymethyl) cresol, 2,6-bis (hydroxymethyl) -4-methoxyphenol, 3 , 3 ′, 5,5′-tetrakis (hydroxymethyl) biphenyl-4,4′-diol, 3,3′-methylenebis (2-hydroxy-5-methylbenzenemethanol), 4,4 ′-(1-methyl) Ethylidene) bis [2-methyl-6-hydroxymethylphenol], 4,4′-methylenebis [2-methyl-6-hydroxymethylphenol], 4,4 ′-(1-methylethylidene) bis [2,6- Bis (hydroxymethyl) phenol], 4,4′-methylenebis [2,6-bis (hydroxymethyl) phenol], 2, -Bis (methoxymethyl) phenol, 2,6-bis (methoxymethyl) cresol, 2,6-bis (methoxymethyl) -4-methoxyphenol, 3,3 ', 5,5'-tetrakis (methoxymethyl)
- an acrylamide compound substituted with a hydroxymethyl group or alkoxymethyl group such as N-hydroxymethylacrylamide, N-methoxymethylmethacrylamide, N-ethoxymethylacrylamide, N-butoxymethylmethacrylamide, or the like
- a hydroxymethyl group or alkoxymethyl group such as N-hydroxymethylacrylamide, N-methoxymethylmethacrylamide, N-ethoxymethylacrylamide, N-butoxymethylmethacrylamide, or the like
- Polymers produced using methacrylamide compounds can also be used. Examples of such a polymer include poly (N-butoxymethylacrylamide), a copolymer of N-butoxymethylacrylamide and styrene, a copolymer of N-hydroxymethylmethacrylamide and methylmethacrylate, and N-ethoxymethyl.
- Examples thereof include a copolymer of methacrylamide and benzyl methacrylate, and a copolymer of N-butoxymethylacrylamide, benzyl methacrylate and 2-hydroxypropyl methacrylate.
- the weight average molecular weight of such a polymer is 1,000 to 50,000, preferably 1,500 to 20,000, more preferably 2,000 to 10,000.
- crosslinkable compounds can be used alone or in combination of two or more.
- the content of the component (D) in the positive photosensitive resin composition of the present invention is preferably 5 to 50 parts by mass, more preferably 10 to 40 parts by mass with respect to 100 parts by mass of the component (A). .
- the amount is less than 5 parts by mass, the heat resistance after metal sputtering may decrease, or the step flatness may decrease.
- it exceeds 50 mass parts the adhesiveness at the time of image development may fall, or a sensitivity may fall.
- the (E) solvent used in the present invention dissolves the (A) component, the (B) component, the (C) component, and the (D) component, and is added as desired (F) component to (G) component described later.
- the type and structure thereof are not particularly limited.
- Examples of such a solvent (E) 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.
- solvents can be used singly or in combination of two or more.
- (E) solvents propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, 2-heptanone, propylene glycol propyl ether, propylene glycol propyl ether acetate, ethyl lactate, butyl lactate, etc. have good coating properties and safety Is preferable from the viewpoint of high.
- These solvents are generally used as solvents for photoresist materials.
- Component (F) is a surfactant.
- the positive photosensitive resin composition of the present invention can further contain a surfactant for the purpose of improving the coating properties as long as the effects of the present invention are not impaired.
- the surfactant as the component (F) is not particularly limited, and examples thereof include a fluorine-based surfactant, a silicone-based surfactant, and a nonionic surfactant.
- a fluorine-based surfactant for example, commercially available products such as those manufactured by Sumitomo 3M Co., Ltd., DIC Corp., or AGC Seimi Chemical Co., Ltd. can be used. These commercial products are convenient because they can be easily obtained.
- Specific examples thereof include Polyfox (registered trademark) PF-136A, 151, 156A, 154N, 159, 636, 6320, 656, 6520 (manufactured by Omniva), MegaFac (registered trademark) R30, R08, R40.
- the surfactant of component (F) can be used alone or in combination of two or more.
- the content thereof is usually 0.01 to 1.0 part by mass, preferably 0.02 to 0.8 part by mass, in 100 parts by mass of the positive photosensitive resin composition. It is. Even if the usage-amount of surfactant of (F) component is set to the quantity exceeding 1.0 mass part, the said coating-effect improvement effect will become dull and it will become economical. When the amount is 0.01 parts or less, the effect of improving applicability may not be exhibited.
- the component (G) is an adhesion promoter.
- the positive photosensitive resin composition of the present invention may contain an adhesion promoter for the purpose of improving the adhesion to the substrate after development.
- adhesion promoter include chlorosilanes such as trimethylchlorosilane, dimethylvinylchlorosilane, methyldiphenylchlorosilane, chloromethyldimethylchlorosilane, trimethylmethoxysilane, dimethyldiethoxysilane, methyldimethoxysilane, dimethylvinylethoxysilane, Diphenyldimethoxysilane, phenyltriethoxysilane, vinyltrichlorosilane, ⁇ -aminopropyltriethoxysilane, ⁇ -methacryloyloxypropyltriethoxysilane, ⁇ -methacryloyloxypropyltrimethoxysilane, ⁇ -glycid
- the adhesion promoter Shin-Etsu Chemical Co., Ltd. make, Momentive Performance Materials Worldwide Inc., for example. Commercially available compounds such as those manufactured by Toray Dow Corning Silicone Co., Ltd. can also be used, and these commercially available products are readily available.
- the component (G) one or two or more of the adhesion promoters can be used. Among these (G) components, alkoxysilanes (that is, silane coupling agents) are preferable in that good adhesion can be obtained.
- the addition amount of these adhesion promoters is usually 0.1 to 20 parts by mass, preferably 0.5 to 10 parts by mass with respect to 100 parts by mass of the component (A). If it is used in an amount of 20 parts by mass or more, the sensitivity may decrease, and if it is less than 0.1 parts by mass, the sufficient effect of the adhesion promoter may not be obtained.
- a rheology modifier a pigment, a dye, a storage stabilizer, an antifoaming agent, or a polyhydric phenol
- a dissolution accelerator such as a polyvalent carboxylic acid can be contained.
- the positive photosensitive resin composition of the present invention comprises (A) component alkali-soluble acrylic polymer, (B) component 1,2-quinonediazide compound, (C) component isocyanurate skeleton and two or more polymerizable compounds.
- a compound having an unsaturated double bond, (D) a crosslinkable compound having two or more substituents selected from an alkoxymethyl group and a hydroxymethyl group as a component is dissolved in (E) a solvent; and
- the composition may further contain one or more of a surfactant as the component (F), an adhesion promoter as the component (G), and other additives.
- the positive photosensitive resin composition of the present invention are as follows. [1]: Based on 100 parts by mass of component (A), 5 to 100 parts by mass of component (B), 5 to 60 parts by mass of component (C), and 5 to 50 parts by mass of component (D). The positive photosensitive resin composition in which these components are dissolved in the solvent (E). [2]: A positive photosensitive resin composition further comprising 0.01 to 1.0 part by mass of component (F) based on 100 parts by mass of component (A) in the composition of [1] above. [3] A positive photosensitive resin composition further comprising 0.1 to 20 parts by mass of the component (F) based on 100 parts by mass of the component (A) in the composition of the above [1] or [2].
- the ratio of the solid content in the positive photosensitive resin composition of the present invention is not particularly limited as long as each component is uniformly dissolved in the solvent, and is, for example, 1 to 80% by mass. It is 5 to 60% by mass, or 10 to 50% by mass.
- solid content means what remove
- the preparation method of the positive photosensitive resin composition of this invention is not specifically limited, As the preparation method, (A) component (alkali-soluble acrylic polymer) is melt
- component (A) component (alkali-soluble acrylic polymer) is melt
- (E) a solution of a copolymer (alkali-soluble acrylic polymer) obtained by a polymerization reaction in a solvent can be used as it is.
- (B), (C), (D), etc. are added to the (A) component solution in the same manner as described above, and (E) additional solvent is added for the purpose of adjusting the concentration. May be.
- the (E) solvent used in the process of forming the copolymer and the (E) solvent used for adjusting the concentration at the time of preparing the positive photosensitive resin composition may be the same, May be different.
- the prepared positive photosensitive resin composition solution is preferably used after being filtered using a filter having a pore size of about 0.2 ⁇ m.
- the positive photosensitive resin composition of the present invention is applied to a semiconductor substrate (for example, a silicon / silicon dioxide coated substrate, a silicon nitride substrate, a substrate coated with a metal such as aluminum, molybdenum, or chromium, a glass substrate, a quartz substrate, or an ITO substrate. Etc.) by spin coating, flow coating, roll coating, slit coating, spin coating following slit, ink jet coating, etc., and then pre-dried in a hot plate or oven to form a coating film can do. Then, a positive photosensitive resin film is formed by heat-treating this coating film.
- a semiconductor substrate for example, a silicon / silicon dioxide coated substrate, a silicon nitride substrate, a substrate coated with a metal such as aluminum, molybdenum, or chromium, a glass substrate, a quartz substrate, or an ITO substrate. Etc.
- a heating temperature and a heating time appropriately selected from the range of a temperature of 70 ° C. to 160 ° C. and a time of 0.3 to 60 minutes are adopted.
- the heating temperature and heating time are preferably 80 to 140 ° C. and 0.5 to 10 minutes.
- the film thickness of the positive photosensitive resin film formed from the positive photosensitive resin composition is, for example, 0.1 to 30 ⁇ m, for example, 0.2 to 10 ⁇ m, and further, for example, 0.3 to 8 ⁇ m. It is.
- a mask having a predetermined pattern is mounted, irradiated with light such as ultraviolet rays, and developed with an alkali developer, so that the exposed portion is washed out and a sharp relief pattern on the end face Is obtained.
- alkali developer examples include aqueous solutions of alkali metal hydroxides such as potassium carbonate, sodium carbonate, potassium hydroxide, and sodium hydroxide, and hydroxides such as tetramethylammonium hydroxide, tetraethylammonium hydroxide, and choline.
- alkali metal hydroxides such as potassium carbonate, sodium carbonate, potassium hydroxide, and sodium hydroxide
- hydroxides such as tetramethylammonium hydroxide, tetraethylammonium hydroxide, and choline.
- a surfactant or the like can be added to these developers.
- a 0.1 to 2.38 mass% aqueous solution of tetraethylammonium hydroxide is generally used as a photoresist developer, and this alkaline developer is also used in the photosensitive resin composition of the present invention. It can be developed satisfactorily without causing problems such as swelling.
- any of a liquid piling method, a dipping method, a rocking dipping method and the like can be used as a developing method.
- the development time at that time is usually 15 to 180 seconds.
- the positive photosensitive resin film is washed with running water, for example, for 20 to 120 seconds, and then air-dried with compressed air or compressed nitrogen or by spinning to remove moisture on the substrate, and A patterned film is obtained.
- the pattern forming film is subjected to post-baking for thermosetting, specifically by heating using a hot plate, an oven, etc., thereby providing heat resistance, transparency, and flatness.
- a film having a good relief pattern with excellent water absorption and chemical resistance can be obtained.
- the post-bake is generally processed at a heating temperature selected from the range of 140 ° C. to 270 ° C. for 5 to 30 minutes when on a hot plate and 30 to 90 minutes when in an oven. The method is taken.
- a desired cured film having a good pattern shape can be obtained by such post-baking.
- the positive photosensitive resin composition of the present invention has a high storage stability, a sufficiently high sensitivity, a very small film loss at an unexposed portion during development, and a coating having a fine pattern. A film can be formed.
- the cured film obtained from this coating film is characterized by excellent heat resistance and solvent resistance after metal sputtering, and high leveling flatness. For this reason, it can be suitably used in applications such as an array flattening film of a TFT type liquid crystal element together with various films in a liquid crystal display and an organic EL display such as an interlayer insulating film, a protective film, and an insulating film.
- (B), (C), (D), (E) solvent, (F) and (G) components are added to the solution of component (A).
- the positive photosensitive resin compositions of each Example and each Comparative Example were prepared by mixing at a ratio of 1% and stirring at room temperature for 3 hours to obtain a uniform solution.
- or Comparative Example 3 which were obtained, the sensitivity of a coating film, the adhesiveness at the time of image development, and the change of the pattern dimension at the time of thermosetting, respectively.
- the step flatness of the cured film and the heat resistance after metal sputtering were measured and evaluated.
- the positive photosensitive resin composition was applied onto a silicon wafer using a spin coater, and then prebaked on a hot plate at a temperature of 120 ° C. for 120 seconds to form a coating film having a thickness of 4.0 ⁇ m.
- the film thickness was measured using F20 manufactured by FILMETRICS.
- This coating film was irradiated with ultraviolet rays having a light intensity of 365 mW / cm 2 at 365 nm for a certain period of time using an ultraviolet irradiation device PLA-600FA manufactured by Canon Inc. Thereafter, the film was developed by immersing it in a 0.4% by mass TMAH aqueous solution for 90 seconds, and then washed with running ultrapure water for 20 seconds. The lowest exposure amount (mJ / cm 2 ) at which no undissolved portion remains in the exposed area was defined as sensitivity.
- the positive photosensitive resin composition was applied on a silicon wafer using a spin coater, and then pre-baked on a hot plate at a temperature of 120 ° C. for 120 seconds to form a coating film.
- This coating film was irradiated with ultraviolet rays having a light intensity at 365 nm of 5.5 mW / cm 2 for a certain period of time through a mask to produce a 10 ⁇ m ⁇ 10 ⁇ m pattern. Thereafter, the film was developed by immersing in a 0.4% by mass TMAH aqueous solution for 90 seconds, and then washed with running ultrapure water for 90 seconds. When the film was not peeled off and all the patterns remained, the adhesion was judged as good ( ⁇ ), and when the film was peeled off and the patterns were not left, it was judged that the adhesion was poor (x).
- the positive photosensitive resin composition was applied onto a silicon wafer using a spin coater, and then pre-baked on a hot plate at a temperature of 120 ° C. for 120 seconds to form a coating film.
- This coating film was post-baked at a temperature of 230 ° C. for 60 minutes using an oven to form a cured film having a thickness of about 4.0 ⁇ m.
- an Al—Nd metal was sputtered to a thickness of 1000 mm using an inter-back sputtering apparatus. Further, this cured film with Al—Nd was heated at 230 ° C. for 30 minutes using an oven. At this time, when no crack was generated on the metal surface, the heat resistance after metal sputtering was good ( ⁇ ), and when a crack was generated on the metal surface, the heat resistance after metal sputtering was judged to be poor (x).
- a positive photosensitive resin composition is applied onto a stepped substrate with Cr (line width 50 ⁇ m, height 0.5 ⁇ m, space between lines 50 ⁇ m) using a spin coater, and then pre-baked on a hot plate at a temperature of 120 ° C. for 120 seconds. To form a coating film. The coating film was post-baked in an oven at a temperature of 230 ° C. for 30 minutes to form a cured film having a thickness of 4.0 ⁇ m. The film thickness was measured using a ULVAC stylus type surface shape measuring device Dektak 150, and the film thickness difference between the coating film on the stepped substrate line and the coating film on the space was measured.
- the flattening rate (DOP) 100 ⁇ ⁇ 1 ⁇ (film thickness difference ( ⁇ m)) / (height of stepped substrate (0.5 ⁇ m)) ⁇ was used to obtain the flattening rate. [Evaluation results] The results of the above evaluation are shown in Table 2 below.
- the positive photosensitive resin composition according to the present invention is suitable as a material for forming a cured film such as a protective film, a planarizing film, and an insulating film in various displays such as a thin film transistor (TFT) type liquid crystal display element and an organic EL element.
- TFT thin film transistor
- it is also suitable as a material for forming an interlayer insulating film of a TFT type liquid crystal element, a protective film for a color filter, an array flattening film, a concavo-convex film below a reflective film of a reflective display, an insulating film of an organic EL element, etc.
- various electronic materials such as a microlens material.
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Abstract
Description
1.下記(A)成分、(B)成分、(C)成分、(D)成分、及び(E)溶剤を含有するポジ型感光性樹脂組成物。
(A)アルカリ可溶性アクリル重合体、
(B)成分:1,2-キノンジアジド化合物、
(C)成分:イソシアヌレート骨格と2個以上の重合性不飽和二重結合とを有する化合物、
(D)成分:アルコキシメチル基及びヒドロキシメチル基から選ばれる置換基を2個以上有する架橋性化合物、
(E)溶剤。
2.(A)成分は、数平均分子量がポリスチレン換算で2,000乃至30,000のアルカリ可溶性アクリル重合体である上記1に記載のポジ型感光性樹脂組成物。
3.(A)成分の100質量部に対して、(B)成分が5乃至100質量部であることを特徴とする上記1乃至2のいずれか一項に記載のポジ型感光性樹脂組成物。
4.(A)成分の100質量部に対して、(C)成分が5乃至60質量部であることを特徴とする上記1乃至3のいずれか一項に記載のポジ型感光性樹脂組成物。
5.(A)成分の100質量部に対して、(D)成分が5乃至50質量部であることを特徴とする上記1乃至3のいずれか一項に記載のポジ型感光性樹脂組成物。
6.(F)成分として、界面活性剤を更にポジ型感光性樹脂組成物100質量部中に0.01乃至1.0質量部含有する、上記1乃至4のうちいずれか一項に記載のポジ型感光性樹脂組成物。
7.(G)成分として、密着促進剤を更にポジ型感光性樹脂組成物中に、(A)成分100質量部に対して0.1乃至20質量部含有する、上記1乃至5のうちいずれか一項に記載のポジ型感光性樹脂組成物。
8.上記1乃至7のうちいずれか一項に記載のポジ型感光性樹脂組成物を用いて得られる硬化膜。
9.上記8に記載の硬化膜を有する表示素子。
10.上記8に記載の硬化膜からなるディスプレイ用アレイ平坦化膜。
11.上記8に記載の硬化膜からなる層間絶縁膜。
(A)アルカリ可溶性アクリル重合体、
(B)成分:1,2-キノンジアジド化合物、
(C)成分:イソシアヌレート骨格と2個以上の重合性不飽和二重結合とを有する化合物、
(D)成分:アルコキシメチル基及びヒドロキシメチル基から選ばれる置換基を2個以上有する架橋性化合物、
(E)溶剤。
以下、各成分の詳細を説明する。
(A)成分は、アルカリ可溶性アクリル重合体である。
(A)成分のアルカリ可溶性アクリル重合体は、アルカリ可溶性アクリル重合体であればよく、アクリル重合体を構成する高分子の主鎖の骨格及び側鎖の種類などについて特に限定されない。
そのようなモノマーの具体例としては、アクリル酸エステル化合物、メタクリル酸エステル化合物、N置換マレイミド化合物、アクリルアミド化合物、アクリロニトリル、スチレン化合物及びビニル化合物等が挙げられる。
以下、上記モノマーの具体例を挙げるが、これらに限定されるものではない。
このようにして得られるアルカリ可溶性アクリル重合体は、通常、溶剤に溶解した溶液の状態である。
上記のアルカリ可溶性モノマーやそれ以外の共重合可能なモノマーとして、エポキシ基を有するモノマーは全く使用されないか又は使用されるとしても、その使用量は、重合に使用される全モノマー100モルに対して10モル以下としておくのが好ましい。
そのため、本発明に用いるアルカリ可溶性アクリル重合体は、エポキシ基を有するモノマーを全く用いずに得られるものであるか又は少量のエポキシ基を有するモノマー(重合に使用される全モノマー100モルに対して10モル以下)を用いて得られるものであるのが好ましい。
本発明においては、上記で得られるアルカリ可溶性アクリル重合体の粉体をそのまま用いても良く、あるいはその粉体を、たとえば後述する(E)溶剤に再溶解して溶液の状態として用いても良い。
また、本発明においては、(A)成分のアクリル重合体は、複数種のアルカリ可溶性アクリル重合体の混合物であってもよい。
(B)成分である1,2-キノンジアジド化合物としては、水酸基又はアミノ基のいずれか一方か、或いは水酸基及びアミノ基の両方を有する化合物であって、これらの水酸基又はアミノ基(水酸基とアミノ基の両方を有する場合は、それらの合計量)のうち、好ましくは10乃至100モル%、特に好ましくは20乃至95モル%が1,2-キノンジアジドスルホン酸でエステル化、またはアミド化された化合物を用いることができる。
(C)成分のイソシアヌレート骨格と2個以上の重合性不飽和二重結合とを有する化合物としては、例えば、トリメタリルイソシアヌレート、トリス(2-アクリロイルオキシエチル)イソシアヌレート、トリス(2-メタクリロイルオキシエチル)イソシアヌレート等が挙げられる。
(D)成分のアルコキシメチル基及びヒドロキシメチル基から選ばれる置換基を2個以上有する架橋性化合物は、熱硬化時の高温に曝されると、脱水縮合反応により架橋反応が進行するものである。このような化合物としては、例えば、アルコキシメチル化グリコールウリル、アルコキシメチル化ベンゾグアナミン、およびアルコキシメチル化メラミン等の化合物、およびフェノプラスト系化合物が挙げられる。
そのようなポリマーとしては、例えば、ポリ(N-ブトキシメチルアクリルアミド)、N-ブトキシメチルアクリルアミドとスチレンとの共重合体、N-ヒドロキシメチルメタクリルアミドとメチルメタクリレートとの共重合体、N-エトキシメチルメタクリルアミドとベンジルメタクリレートとの共重合体、及びN-ブトキシメチルアクリルアミドとベンジルメタクリレートと2-ヒドロキシプロピルメタクリレートとの共重合体等が挙げられる。このようなポリマーの重量平均分子量は、1,000乃至50,000であり、好ましくは、1,500乃至20,000であり、より好ましくは2,000乃至10,000である。
本発明に用いる(E)溶剤は、(A)成分、(B)成分、(C)成分及び(D)成分を溶解し、且つ所望により添加される後述の(F)成分乃至(G)成分などを溶解するものであり、斯様な溶解能を有する溶剤であれば、その種類及び構造などは特に限定されるものでない。
これら(E)溶剤の中、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、2-ヘプタノン、プロピレングリコールプロピルエーテル、プロピレングリコールプロピルエーテルアセテート、乳酸エチル、乳酸ブチル等が、塗膜性が良好で安全性が高いという観点より好ましい。これら溶剤は、一般にフォトレジスト材料のための溶剤として用いられている。
(F)成分は、界面活性剤である。本発明のポジ型感光性樹脂組成物にあっては、その塗布性を向上させるという目的で、本発明の効果を損なわない限りにおいて、更に界面活性剤を含有することができる。
(F)成分の界面活性剤は、一種単独で、または二種以上の組合せで使用することができる。
界面活性剤が使用される場合、その含有量は、ポジ型感光性樹脂組成物100質量部中に通常0.01乃至1.0質量部であり、好ましくは0.02乃至0.8質量部である。(F)成分の界面活性剤の使用量が1.0質量部を超える量に設定されても、上記塗布性の改良効果は鈍くなり、経済的でなくなる。0.01部以下である場合、塗布性の改良の効果が発現しない場合がある。
(G)成分は、密着促進剤である。本発明のポジ型感光性樹脂組成物は現像後の基板との密着性を向上させる目的で、密着促進剤を添加してもよい。このような密着促進剤の具体例としては、トリメチルクロロシラン、ジメチルビニルクロロシラン、メチルジフェニルクロロシラン、クロロメチルジメチルクロロシラン等のクロロシラン類、トリメチルメトキシシラン、ジメチルジエトキシシラン、メチルジメトキシシラン、ジメチルビニルエトキシシラン、ジフェニルジメトキシシラン、フェニルトリエトキシシラン、ビニルトリクロロシラン、γ-アミノプロピルトリエトキシシラン、γ-メタクリロイルオキシプロピルトリエトキシシラン、γ-メタクリロイルオキシプロピルトリメトキシシラン、γ-グリシドキシプロピルトリエトキシシラン、γ-(N-ピペリジニル)プロピルトリエトキシシラン、3-ウレイドプロピルトリエトキシシラン、3-ウレイドプロピルトリメトキシシラン等のアルコキシシラン類、ヘキサメチルジシラザン、N,N‘‐ビス(トリメチルシリル)ウレア、ジメチルトリメチルシリルアミン、トリメチルシリルイミダゾール等のシラザン類、ベンゾトリアゾール、ベンズイミダゾール、インダゾール、イミダゾール、2-メルカプトベンズイミダゾール、2-メルカプトベンゾチアゾール、2-メルカプトベンゾオキサゾール、ウラゾール、チオウラシル、メルカプトイミダゾール、メルカプトピリミジン等の複素環状化合物や、1,1-ジメチルウレア、1,3-ジメチルウレア等の尿素、またはチオ尿素化合物を挙げることができる。
(G)成分として、前記密着性促進剤のうち1種又は2種類以上を組み合わせて用いることができる。
これらの(G)成分の中、アルコキシシラン類(すなわち、シランカップリング剤)が良好な密着性が得られる点で好ましい。
これらの密着促進剤の添加量は、(A)成分の100質量部に対して、通常、0.1乃至20質量部、好ましくは0.5乃至10質量部である。20質量部以上用いると感度が低下する場合があり、また、0.1質量部未満では密着促進剤の十分な効果が得られない場合がある。
更に、本発明のポジ型感光性樹脂組成物は、本発明の効果を損なわない限りにおいて、必要に応じて、レオロジー調整剤、顔料、染料、保存安定剤、消泡剤、または多価フェノール、多価カルボン酸等の溶解促進剤等を含有することができる。
本発明のポジ型感光性樹脂組成物は、(A)成分のアルカリ可溶性アクリル重合体、(B)成分の1,2-キノンジアジド化合物、(C)成分のイソシアヌレート骨格と2個以上の重合性不飽和二重結合とを有する化合物、(D)成分のアルコキシメチル基及びヒドロキシメチル基から選ばれる置換基を2個以上有する架橋性化合物が(E)溶剤に溶解されたものであり、且つ、それぞれ所望により、(F)成分の界面活性剤、(G)成分の密着促進剤、及びその他添加剤のうち一種以上を更に含有することができる組成物である。
[1]:(A)成分100質量部に基づいて、5乃至100質量部の(B)成分、5乃至60質量部の(C)成分、5乃至50質量部の(D)成分を含有し、これら成分が(E)溶剤に溶解されたポジ型感光性樹脂組成物。
[2]:上記[1]の組成物において、更に(F)成分を(A)成分100質量部に基づいて、0.01乃至1.0質量部含有するポジ型感光性樹脂組成物。
[3]:上記[1]又は[2]の組成物において、更に(F)成分を(A)成分100質量部に基づいて0.1乃至20質量部含有するポジ型感光性樹脂組成物。
本発明のポジ型感光性樹脂組成物を半導体基板(例えば、シリコン/二酸化シリコン被覆基板、シリコンナイトライド基板、金属例えばアルミニウム、モリブデン、クロムなどが被覆された基板、ガラス基板、石英基板、ITO基板等)の上に、回転塗布、流し塗布、ロール塗布、スリット塗布、スリットに続いた回転塗布、インクジェット塗布などによって塗布し、その後、ホットプレートまたはオーブン等で予備乾燥することにより、塗膜を形成することができる。その後、この塗膜を加熱処理することにより、ポジ型感光性樹脂膜が形成される。
[実施例で用いる略記号]
以下の実施例で用いる略記号の意味は、次のとおりである。
MAA:メタクリル酸
MMA:メチルメタクリレート
HEMA:2-ヒドロキシエチルメタクリレート
CHMI:N-シクロヘキシルマレイミド
AIBN:アゾビスイソブチロニトリル
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
QD:α、α、α‘-トリス(4-ヒドロキシフェニル)-1-エチル-4-イソプロピルベンゼン1molと1,2-ナフトキノン-2-ジアジド-5-スルホニルクロリド1.5molとの縮合反応によって合成される化合物
TAIC:トリス(2-アクリロイルオキシエチル)イソシアヌレート
HMM:ヘキサメトキシメチルメラミン
CEL-2021P:3,4-エポキシシクロヘキシルメチル-3’,4’-エポキシシクロヘキサンカルボキシレート
DPHA:ジペンタエリスリトールペンタ/ヘキサアクリレート
MPTS:γ―メタクリロキシプロピルトリメトキシシラン
R30:大日本インキ化学工業(株)製 メガファック R-30(商品名)
TMAH:水酸化テトラメチルアンモニウム
以下の合成例に従い得られたアルカリ可溶性アクリル重合体及び特定架橋体の数平均分子量及び重量平均分子量を、日本分光(株)製GPC装置(Shodex(登録商標)カラムKF803LおよびKF804L)を用い、溶出溶媒テトラヒドロフランを流量1ml/分でカラム中に(カラム温度40℃)流して溶離させるという条件で測定した。なお、下記の数平均分子量(以下、Mnと称す。)及び重量平均分子量(以下、Mwと称す。)は、ポリスチレン換算値にて表される。
アルカリ可溶性アクリル重合体を構成するモノマー成分として、MAA 10.9g、CHMI 35.3g、HEMA 25.5g、MMA 28.3gを使用し、ラジカル重合開始剤としてAIBN 5gを使用し、これらを溶剤PGMEA 150g中において温度60℃乃至100℃で重合反応させることにより、Mn3,800、Mw6,700である(A)成分(アルカリ可溶性アクリル重合体)の溶液(アルカリ可溶性アクリル重合体濃度:40.0質量%)を得た。(P1)
次の表1に示す組成に従い、(A)成分の溶液に、(B)成分、(C)成分、及び(D)成分、(E)溶剤、更に(F)成分及び(G)成分を所定の割合で混合し、室温で3時間撹拌して均一な溶液とすることにより、各実施例及び各比較例のポジ型感光性樹脂組成物を調製した。
ポジ型感光性樹脂組成物をシリコンウェハー上にスピンコーターを用いて塗布した後、温度120℃で120秒間ホットプレート上においてプリベークを行い膜厚4.0μmの塗膜を形成した。膜厚はFILMETRICS製 F20を用いて測定した。この塗膜にキヤノン(株)製紫外線照射装置PLA-600FAにより365nmにおける光強度が5.5mW/cm2の紫外線を一定時間照射した。その後0.4質量%のTMAH水溶液に90秒間浸漬することで現像を行った後、超純水で20秒間流水洗浄を行った。露光部において溶け残りのなくなる最低の露光量(mJ/cm2)を感度とした。
ポジ型感光性樹脂組成物をシリコンウェハー上にスピンコーターを用いて塗布した後、温度120℃で120秒間ホットプレート上においてプリベークを行い塗膜を形成した。この塗膜に365nmにおける光強度が5.5mW/cm2の紫外線をマスクを介して一定時間照射し、10μm×10μmのパターンを作製した。その後0.4質量%のTMAH水溶液に90秒間浸漬することで現像を行った後、超純水で90秒間流水洗浄を行った。膜剥がれがなくパターンが全て残存している場合、密着性が良好(○)、膜が剥がれパターンが残存していない場合、密着性が不良(×)であると判断した。
密着性評価で作製したシリコンウェハー基板をエスペック(株)製CLEANOVEN PVHC-210を用いて230℃で30分間ポストベークを行い、膜厚約4.0μmの硬化膜を形成した。この作製したパターンのパターン寸法を日立電界放出形走査電子顕微鏡S-4100によって計測した。寸法安定性は、9.0μm<パターン寸法<10.0μmを維持することが好ましい。
ポジ型感光性樹脂組成物をシリコンウェハー上にスピンコーターを用いて塗布した後、温度120℃で120秒間ホットプレート上においてプリベークを行い、塗膜を形成した。
この塗膜を、オーブンを用いて温度230℃で60分間ポストベークを行い、膜厚約4.0μmの硬化膜を形成した。この硬化膜上にインターバックスパッタ装置を用いて1000Åの膜厚でAl-Nd金属をスパッタ成膜した。さらに、このAl-Nd付き硬化膜を、オーブンを用いて230℃30分間加熱した。この際、金属表面にクラックが発生しない場合はメタルスパッタ後の耐熱性が良好(○)、金属表面にクラックが発生した場合はメタルスパッタ後の耐熱性が不良(×)であると判断した。
ポジ型感光性樹脂組成物をCr付段差基板(ライン幅50μm、高さ0.5μm、ライン間スペース50μm)上にスピンコーターを用いて塗布した後、温度120℃で120秒間ホットプレート上においてプリベークを行い塗膜を形成した。その塗膜を温度230℃で30分間オーブンにおいてポストベークを行い膜厚4.0μmの硬化膜を形成した。膜厚はULVAC製触針式表面形状測定器Dektak150を用いて測定し、段差基板ライン上の塗膜とスペース上の塗膜の膜厚差を測定した。平坦化率(DOP)=100×{1-(塗膜の膜厚差(μm))/(段差基板の高さ(0.5μm)}の式を用いて平坦化率を求めた。
[評価の結果]
以上の評価を行った結果を、次の表2に示す。
Claims (11)
- 下記(A)成分、(B)成分、(C)成分、(D)成分、及び(E)溶剤を含有するポジ型感光性樹脂組成物。
(A)アルカリ可溶性アクリル重合体、
(B)成分:キノンジアジド化合物、
(C)成分:イソシアヌレート骨格と2個以上の重合性不飽和二重結合とを有する化合物、
(D)成分:アルコキシメチル基及びヒドロキシメチル基から選ばれる置換基を2個以上有する架橋性化合物、
(E)溶剤。 - (A)成分は、数平均分子量がポリスチレン換算で2,000乃至30,000のアルカリ可溶性アクリル重合体である請求項1に記載のポジ型感光性樹脂組成物。
- (A)成分の100質量部に対して、(B)成分が5乃至100質量部であることを特徴とする請求項1乃至請求項2のいずれか一項に記載のポジ型感光性樹脂組成物。
- (A)成分の100質量部に対して、(C)成分が5乃至60質量部であることを特徴とする請求項1乃至請求項3のいずれか一項に記載のポジ型感光性樹脂組成物。
- (A)成分の100質量部に対して、(D)成分が5乃至50質量部であることを特徴とする請求項1乃至請求項3のいずれか一項に記載のポジ型感光性樹脂組成物。
- (F)成分として、界面活性剤を更にポジ型感光性樹脂組成物100質量部中に0.01乃至1.0質量部含有する、請求項1乃至請求項4のうちいずれか一項に記載のポジ型感光性樹脂組成物。
- (G)成分として、密着促進剤を更にポジ型感光性樹脂組成物中に、(A)成分100質量部に対して0.1乃至20質量部含有する、請求項1乃至請求項5のうちいずれか一項に記載のポジ型感光性樹脂組成物。
- 請求項1乃至請求項7のうちいずれか一項に記載のポジ型感光性樹脂組成物を用いて得られる硬化膜。
- 請求項8に記載の硬化膜を有する表示素子。
- 請求項8に記載の硬化膜からなるディスプレイ用アレイ平坦化膜。
- 請求項8に記載の硬化膜からなる層間絶縁膜。
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