WO2017164103A1 - エッチング用マスクレジスト組成物、それを用いた基板の製造方法および発光素子の製造方法 - Google Patents
エッチング用マスクレジスト組成物、それを用いた基板の製造方法および発光素子の製造方法 Download PDFInfo
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- WO2017164103A1 WO2017164103A1 PCT/JP2017/010861 JP2017010861W WO2017164103A1 WO 2017164103 A1 WO2017164103 A1 WO 2017164103A1 JP 2017010861 W JP2017010861 W JP 2017010861W WO 2017164103 A1 WO2017164103 A1 WO 2017164103A1
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- etching
- resist composition
- carbon atoms
- mask resist
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- 239000004642 Polyimide Substances 0.000 claims abstract description 79
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 43
- 238000001312 dry etching Methods 0.000 claims abstract description 35
- 125000000962 organic group Chemical group 0.000 claims abstract description 25
- 125000005462 imide group Chemical group 0.000 claims abstract description 22
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
-
- 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
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/037—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polyamides or polyimides
-
- 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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary 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
- G03F7/20—Exposure; Apparatus therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/12—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a stress relaxation structure, e.g. buffer layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/20—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
- H01L33/22—Roughened surfaces, e.g. at the interface between epitaxial layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/30—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table
- H01L33/32—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table containing nitrogen
Definitions
- the present invention relates to an etching mask resist composition, a method for producing a substrate using the same, and a method for producing a light emitting element (diode).
- a light emitting diode (LED: Light Emitting Diodes) is a kind of element that converts electrical energy into light energy by utilizing characteristics of a semiconductor. Since LEDs have good energy conversion efficiency and long life, they are widely used as electronic devices such as various lighting devices, illuminations, and displays. For this reason, in recent years, there has been a demand for higher brightness of light emitting elements used in LEDs.
- a light emitting device used for such an LED has a structure in which an n type semiconductor layer such as an n type GaN layer, a light emitting layer such as an InGaN layer, and a p type semiconductor layer such as a p type GaN layer are sequentially formed on a substrate. It has a structure in which light is generated by recombination of electrons injected from the n-type semiconductor layer and holes injected from the p-type semiconductor layer in the light-emitting layer.
- a technique for forming a GaN-based semiconductor layer by an epitaxial growth method in which a GaN-based semiconductor is aligned on the crystal surface of the underlying substrate and crystal growth is performed on a substrate crystal is known. Yes.
- a crystal growth substrate a single crystal sapphire substrate having excellent mechanical characteristics, thermal characteristics, chemical stability, and light transmittance is often used.
- a method for improving the light extraction efficiency from the light emitting layer a method is known in which a resist pattern is formed on a sapphire substrate and the sapphire substrate is dry-etched using this as a mask to form a convex pattern on the surface of the sapphire substrate.
- a resist pattern is formed on a sapphire substrate and the sapphire substrate is dry-etched using this as a mask to form a convex pattern on the surface of the sapphire substrate.
- Patent Documents 1 to 3 Due to the formation of the convex pattern, when the GaN-based semiconductor layer is formed, the crystal dislocation advances along the convex pattern, so that defects in the GaN layer are reduced as compared with the case where a smooth sapphire substrate is used. Moreover, total reflection at the layer interface can be suppressed by scattering and diffracting the light generated in the light emitting layer.
- the present invention does not cause resist burning or carbonization even in a high-power dry etching process at a high temperature of 100 ° C. to 300 ° C., and provides high etching resistance even when resist curing is performed at a low temperature. It aims at providing the mask resist composition for an etching from which a high sapphire pattern is obtained.
- the present invention is a composition
- a composition comprising (A) a polyimide mainly composed of a structural unit represented by the general formula (1), and (B) a photoacid generator, wherein the polyimide (A) has an imide group equivalent.
- It is a mask resist composition for etching characterized by being 0.0025 mol / g or more.
- R 1 represents a divalent organic group having 2 to 50 carbon atoms.
- R 2 represents a trivalent or tetravalent organic group having 2 to 50 carbon atoms.
- the etching mask resist composition of the present invention does not cause resist burning or carbonization even in a high-power dry etching process at a high temperature of 100 ° C. to 300 ° C., and has high etching resistance even when the resist is cured at a low temperature. can get. Therefore, it is possible to obtain a sapphire pattern with high in-plane uniformity.
- the mask resist composition for etching of the present invention comprises (A) a polyimide having a structural unit represented by the general formula (1) as a main component and an imide group equivalent of 0.0025 mol / g or more, and (B) light. Contains acid generator.
- (A) Polyimide is a resin component in the etching mask resist composition of the present invention.
- (A) polyimide contains a structural unit represented by the general formula (1) as a main component.
- R 1 represents a divalent organic group having 2 to 50 carbon atoms.
- R 2 represents a trivalent or tetravalent organic group having 2 to 50 carbon atoms.
- m 1 is 0 or 1
- c 1 is 0 or 1
- the main component mentioned here means that (A) polyimide occupies 60% by weight or more, preferably 80% by weight or more.
- (A) The polyimide which consists of a structural unit substantially represented by General formula (1) may be sufficient as a polyimide.
- “a polyimide consisting essentially of a structural unit represented by the general formula (1)” does not exclude the inclusion of other structural units within a range not impairing the effects of the present invention.
- the content of the structural unit represented by the general formula (1) is such that the obtained resin is directly subjected to infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), thermogravimetry-mass spectrometry (TG-MS). , Analysis by time-of-flight secondary ion mass spectrometry (TOF-SIMS), etc., or after gas decomposition (GC), high performance liquid chromatography (HPLC), mass spectrometry (MS), FT It can be estimated by a method such as analysis by -IR, NMR, etc., and further by elemental analysis after ashing the resin at a high temperature.
- FT-IR infrared spectroscopy
- NMR nuclear magnetic resonance
- TG-MS thermogravimetry-mass spectrometry
- TOF-SIMS Analysis by time-of-flight secondary ion mass spectrometry
- GC gas decomposition
- HPLC high performance liquid chromatography
- MS mass spectrometry
- R 1 represents a diamine residue.
- the diamine residue is preferably a diamine residue having a hydroxyl group from the viewpoint of solubility in an alkaline aqueous solution as a developer and photosensitive performance.
- Examples of the amine component that gives a diamine residue having a hydroxyl group include bis (3-amino-4-hydroxyphenyl) hexafluoropropane, bis (3-amino-4-hydroxyphenyl) sulfone, and bis (3-amino-4- Hydroxyphenyl) propane, bis (3-amino-4-hydroxyphenyl) methylene, bis (3-amino-4-hydroxyphenyl) ether, bis (3-amino-4-hydroxy) biphenyl, bis (3-amino-4) -Hydroxyphenyl) fluorene, bis (4-amino-3-hydroxyphenyl) hexafluoropropane, bis (4-amino-3-hydroxyphenyl) sulfone, bis (4-amino-3-hydroxyphenyl) propane, bis (4 -Amino-3-hydroxyphenyl) methylene, bis ( - amino-3-hydroxyphenyl) ether, bis (4-amino-3-hydroxy)
- the diamine residue (R 1 ) is more preferably a structure represented by the following general formula (8).
- R 17 represents an organic group represented by at least one selected from a single bond, C (CF 3 ) 2 , C (CH 3 ) 2 , SO 2 , O, S, and CH 2. . More preferred are C (CF 3 ) 2 and SO 2 , and most preferred is SO 2 .
- the diamine residue may contain a diamine residue that does not have a hydroxyl group.
- amine components that give such diamine residues include carboxyl group-containing diamines such as 3,5-diaminobenzoic acid, 3-carboxy-4,4′-diaminodiphenyl ether, and 3-sulfonic acid-4,4′-diamino.
- Sulfonic acid-containing diamines such as diphenyl ether, dithiohydroxyphenylenediamine, 3,4'-diaminodiphenyl ether, 4,4'-diaminodiphenyl ether, 3,4'-diaminodiphenylmethane, 4,4'-diaminodiphenylmethane, 3,4'- Diaminodiphenylsulfone, 4,4'-diaminodiphenylsulfone, 3,4'-diaminodiphenylsulfide, 4,4'-diaminodiphenylsulfide, 1,4-bis (4-aminophenoxy) benzene, m-phenylenediamine , P-Phenylenedi Min, 1,5-naphthalenediamine, 2,6-naphthalenediamine, bis (4-aminophenoxyphenyl) sulfone, bis (3-aminophenoxyphenyl)
- diamine residues can also be used as a diamine, or as a diisocyanate compound or trimethylsilylated diamine in which an isocyanate group or a trimethylsilylated amine is bonded to the structure of the diamine residue instead of an amino group.
- the hydrogen atom of the diamine residue based on the diamine exemplified above is an alkyl group having 1 to 10 carbon atoms such as a methyl group or an ethyl group, a fluoroalkyl group having 1 to 10 carbon atoms such as a trifluoromethyl group, a hydroxyl group, Those substituted with 1 to 4 amino groups, sulfonic acid groups, sulfonic acid amide groups or sulfonic acid ester groups, F, Cl, Br, I and the like may be used.
- R 2 represents a tri- or tetra-carboxylic acid residue (hereinafter referred to as “acid residue”).
- Examples of preferable tricarboxylic acid that gives an acid residue include trimellitic acid, trimesic acid, diphenyl ether tricarboxylic acid, biphenyltricarboxylic acid, and the like.
- Examples of preferred tetracarboxylic acids that give acid residues include pyromellitic acid, 3,3 ′, 4,4′-biphenyltetracarboxylic acid, 2,3,3 ′, 4′-biphenyltetracarboxylic acid, 2,2 ', 3,3'-biphenyltetracarboxylic acid, 3,3', 4,4'-benzophenone tetracarboxylic acid, 2,2 ', 3,3'-benzophenone tetracarboxylic acid, 2,2-bis (3 4-dicarboxyphenyl) hexafluoropropane, 2,2-bis (2,3-dicarboxyphenyl) hexafluoropropane, 1,1-bis (3,4-dicarboxyphenyl) ethane, 1,1-bis ( 2,3-dicarboxyphenyl) ethane, bis (3,4-dicarboxyphenyl) methane, bis (2,3-
- Heptanetetracarboxylic acid bicyclo [3.3.1. ] Tetracarboxylic acid, bicyclo [3.1.1. ] Hept-2-enetetracarboxylic acid, bicyclo [2.2.2.
- An aliphatic tetracarboxylic acid such as octanetetracarboxylic acid or adamatanetetracarboxylic acid can be used. These acids can be used alone or in combination of two or more.
- the acid residue (R 2 ) preferably contains an aromatic ring and / or an aliphatic ring, and has a structure represented by the following general formulas (9) to (11) More preferably, at least one selected from the group consisting of:
- R 12 to R 16 each independently represent a halogen atom or a monovalent organic group having 1 to 3 carbon atoms.
- b 5 to b 7 are each independently an integer of 0 to 2
- b 8 to b 9 are integers of 0 to 3.
- tricarboxylic acid or tetracarboxylic acid giving an acid residue include pyromellitic acid, 3,3 ′, 4,4′-biphenyltetracarboxylic acid, 2,3,3 ′, 4′-biphenyltetracarboxylic acid 2,2 ′, 3,3′-biphenyltetracarboxylic acid, naphthalenetetracarboxylic acid, and the like. These acids can be used alone or in combination of two or more.
- 1,3-bis (p-carboxyphenyl) -1,1,3,3-tetramethyldisiloxane, 1- (p-carboxyphenyl) 3-phthalic acid-1,1,3 Carboxyl compounds having a siloxane bond such as 1,3-tetramethyldisiloxane and 1,3-bisphthalic acid-1,1,3,3-tetramethyldisiloxane can also be used.
- siloxane bond such as 1,3-tetramethyldisiloxane and 1,3-bisphthalic acid-1,1,3,3-tetramethyldisiloxane
- the adhesion to the substrate can be enhanced, and further, the dry etching resistance can be enhanced.
- Polyimide used in the present invention has an imide group equivalent of 0.0025 mol / g or more from the viewpoint of improving dry etching resistance. Preferably it is 0.003 mol / g or more, More preferably, it is 0.0032 mol / g or more. Most preferably, it is 0.0034 mol / g or more.
- This imide group equivalent is calculated as follows.
- the number of imide groups in the structural unit is A (mol), and the molecular weight of the structural unit is B (g).
- the polyimide (A) used in the present invention may have a polymer terminal sealed with a terminal sealing agent such as an acid anhydride, a monocarboxylic acid compound, an acid chloride compound and a monoamine compound.
- a terminal sealing agent such as an acid anhydride, a monocarboxylic acid compound, an acid chloride compound and a monoamine compound.
- Examples of such acid anhydrides include phthalic anhydride, maleic anhydride, nadic anhydride, cyclohexane dicarboxylic anhydride, 3-hydroxyphthalic anhydride, 1,10-anthracene dicarboxylic anhydride, 1, Examples include 2-anthracene dicarboxylic acid anhydride and 2,3-anthracene dicarboxylic acid anhydride.
- monocarboxylic acid compounds examples include 2-carboxyphenol, 3-carboxyphenol, 4-carboxyphenol, 2-carboxythiophenol, 3-carboxythiophenol, 4-carboxythiophenol, 1-hydroxy-8-carboxynaphthalene 1-hydroxy-7-carboxynaphthalene, 1-hydroxy-6-carboxynaphthalene, 1-hydroxy-5-carboxynaphthalene, 1-hydroxy-4-carboxynaphthalene, 1-hydroxy-3-carboxynaphthalene, 1-hydroxy- 2-carboxynaphthalene, 1-mercapto-8-carboxynaphthalene, 1-mercapto-7-carboxynaphthalene, 1-mercapto-6-carboxynaphthalene, 1-mercapto-5-carboxynaphthalene, -Mercapto-4-carboxynaphthalene, 1-mercapto-3-carboxynaphthalene, 1-mercapto-2-carboxynaphthalene, 2-carboxybenzene
- acid chloride compounds include monoacid chloride compounds in which the carboxyl group of the above-mentioned monocarboxylic acid compound is converted to acid chloride, terephthalic acid, phthalic acid, maleic acid, cyclohexanedicarboxylic acid, 3-hydroxyphthalic acid, 5-norbornene- 2,3-dicarboxylic acid, 1,2-dicarboxynaphthalene, 1,3-dicarboxynaphthalene, 1,4-dicarboxynaphthalene, 1,5-dicarboxynaphthalene, 1,6-dicarboxynaphthalene, 1,7 -Only one carboxyl group of dicarboxylic acids such as dicarboxynaphthalene, 1,8-dicarboxynaphthalene, 2,3-dicarboxynaphthalene, 2,6-dicarboxynaphthalene, 2,7-dicarboxynaphthalene is converted to acid chloride And monoacid chloride compounds.
- monoamine compounds include aniline, naphthylamine, aminopyridine, 3-ethynylaniline, 4-ethynylaniline, 3-amino-4,6-dihydroxypyrimidine, 2-aminophenol, 3-aminophenol, 4-aminophenol, 5-amino-8-hydroxyquinoline, 4-amino-8-hydroxyquinoline, 1-hydroxy-8-aminonaphthalene, 1-hydroxy-7-aminonaphthalene, 1-hydroxy-6-aminonaphthalene, 1-hydroxy-5 -Aminonaphthalene, 1-hydroxy-4-aminonaphthalene, 1-hydroxy-3-aminonaphthalene, 1-hydroxy-2-aminonaphthalene, 1-amino-7-hydroxynaphthalene, 2-hydroxy-7-aminonaphthalene, 2 -Hydroxy-6-amino Naphthalene, 2-hydroxy-5-aminonaphthalene, 2-hydroxy-4-aminonaphthalene, 2-hydroxy-3-aminonaphthalene
- terminal anhydrides such as acid anhydrides, monocarboxylic acid compounds, acid chloride compounds and monoamine compounds can be used alone or in combination of two or more, and other terminal blocking agents may be used in combination.
- Examples of a particularly preferable polyimide terminal structure in terms of enhancing dry etching resistance include those containing at least one selected from the following general formulas (2), (3), and (4).
- R 18 , R 19 and R 20 each represent a condensed polycyclic aromatic hydrocarbon group having 9 to 18 carbon atoms, and the hydrogen atom on the condensed polycyclic aromatic hydrocarbon group is an alkyl group having 1 to 4 carbon atoms. May be substituted.
- R 18 include, but are not limited to, monoamine residues such as 1-aminoanthracene, 2-aminoanthracene, 3-aminoanthracene, 1-aminopyrene, 2-aminopyrene, and 3-aminopyrene.
- Preferred R 19 is 1,10-anthracene dicarboxylic acid anhydride, 1,2-anthracene dicarboxylic acid anhydride, 2,3-anthracene dicarboxylic acid anhydride, 1,2-pyrene dicarboxylic acid anhydride, 2,3-pyrene.
- Examples thereof include, but are not limited to, acid anhydride residues such as dicarboxylic acid anhydride and 3,4-pyrene dicarboxylic acid anhydride.
- R 20 include, but are not limited to, monocarboxylic acid residues such as 1-carboxyanthracene, 2-carboxyanthracene, and 3-carboxyanthracene.
- the content of the end-capping agent such as the acid anhydride, monocarboxylic acid compound, acid chloride compound, monoamine compound described above is 0.1 to the number of moles of charged component monomers constituting the carboxylic acid residue and amine residue.
- the range is preferably 60 mol%, more preferably 5 to 50 mol%.
- Polyimide used in the present invention is a polymerization reaction of tricarboxylic acid, tetracarboxylic acid, or anhydrides, acid chlorides, active esters, active amides and diamines, or corresponding diisocyanate compounds and trimethylsilylated diamines. Can be obtained.
- the polyimide (A) used in the present invention preferably has a weight average molecular weight of 5000 to 80000. More preferably, it is 10,000 to 60,000, and most preferably 20,000 to 40,000. By setting it as such a range, it can be set as the composition excellent in the dry etching tolerance and the resist removability after an etching.
- the (A) polyimide used in the present invention may be obtained by precipitating in a poor solvent for polyimide such as methanol or water after completion of polymerization, and then washing and drying.
- a poor solvent for polyimide such as methanol or water
- an esterifying agent, a condensing agent, a by-product due to acid chloride, a low molecular weight component, and the like used during polymerization can be removed, so that there is an advantage that the heat resistance of the cured pattern is improved.
- the mask resist composition for etching of the present invention contains (B) a photoacid generator.
- the photoacid generator examples include quinonediazide compounds and onium salt compounds such as sulfonium salts, phosphonium salts, diazonium salts, and iodonium salts.
- the etching mask resist composition of the present invention preferably contains a quinonediazide compound, and more preferably contains an onium salt in addition to the quinonediazide compound from the viewpoint of improving dry etching resistance.
- the quinonediazide compound includes a polyhydroxy compound in which a sulfonic acid of quinonediazide is bonded with an ester, a polyamino compound in which a sulfonic acid of quinonediazide is bonded to a sulfonamide, and a sulfonic acid of quinonediazide in an ester bond and / or sulfone.
- Examples include amide-bonded ones.
- an o-quinonediazide compound that is these quinonediazide o-quinonediazide is preferable.
- polyhydroxy compound examples include the following compounds (all manufactured by Honshu Chemical Industry Co., Ltd.).
- Polyamino compounds include 1,4-phenylenediamine, 1,3-phenylenediamine, 4,4′-diaminodiphenyl ether, 4,4′-diaminodiphenylmethane, 4,4′-diaminodiphenylsulfone, 4,4′-diaminodiphenyl And sulfido.
- polyhydroxypolyamino compound examples include 2,2-bis (3-amino-4-3-hydroxyphenyl) hexafluoropropane, 3,3′-dihydroxybenzidine and the like.
- quinonediazide is preferably a 5-naphthoquinonediazidesulfonyl group or a 4-naphthoquinonediazidesulfonyl group.
- the 4-naphthoquinonediazide sulfonyl ester compound has absorption in the i-line region of a mercury lamp and is suitable for i-line exposure.
- the 5-naphthoquinone diazide sulfonyl ester compound has absorption up to the g-line region of a mercury lamp and is suitable for g-line exposure.
- a naphthoquinone diazide sulfonyl ester compound can be obtained by using a 4-naphthoquinone diazide sulfonyl group and a 5-naphthoquinone diazide sulfonyl group in the same molecule, or a 4-naphthoquinone diazide sulfonyl ester compound and a 5-naphthoquinone diazide sulfonyl ester compound. Can also be used in combination.
- the molecular weight of the quinonediazide compound is preferably 300 or more, more preferably 350 or more. Moreover, 1500 or less is preferable and 1200 or less is more preferable. When the molecular weight is 300 or more, the exposure sensitivity is high, and when it is 1500 or less, there is an advantage that the mechanical properties of the heat-resistant film after the heat treatment are improved.
- the quinonediazide compound used in the present invention is synthesized from a specific phenol compound by the following method. For example, there is a method of reacting 5-naphthoquinonediazidesulfonyl chloride with a phenol compound in the presence of triethylamine. As a method for synthesizing a phenol compound, there is a method in which an ⁇ - (hydroxyphenyl) styrene derivative is reacted with a polyhydric phenol compound under an acid catalyst.
- the onium salt compound used in the present invention is preferably a compound selected from a sulfonium salt, a phosphonium salt, and a diazonium salt. By using these, the resolution of the pattern is remarkably improved. Furthermore, a sulfonium salt is preferably used from the viewpoint of dry etching resistance. Of the sulfonium salts, those represented by the general formulas (12) to (14) are more preferably used.
- R 21 to R 23 may be the same or different and each represents an organic group having 1 to 20 carbon atoms.
- Preferred examples include alkyl groups such as methyl group, ethyl group, propyl group, isopropyl group, butyl group and t-butyl group, cycloalkyl groups such as cyclopentyl group and cyclohexyl group, and aryl groups such as phenyl group and naphthyl group.
- 1 to 4 hydrogen atoms of cyclopentyl group, cyclohexyl group, phenyl group and naphthyl group are alkyl groups having 1 to 4 carbon atoms such as methyl group and ethyl group, and 1 carbon atom such as methoxy group and ethoxy group.
- alkoxy groups such as alkoxy groups, trifluoromethyl groups, hydroxyl groups, amino groups, sulfonic acid groups, sulfonic acid amide groups, sulfonic acid ester groups, F, Cl, Br or I, etc. A substituted one may be used.
- R 24 and R 25 represent a single bond, an ether group, a thioether group, a sulfone group, or a ketone group.
- Z ⁇ represents an anion moiety selected from R 26 SO 3 ⁇ , R 26 COO ⁇ and SbF 6 — .
- R 26 represents an organic group having 1 to 20 carbon atoms.
- Preferred examples include alkyl groups having 1 to 18 carbon atoms such as dodecyl group, fluoroalkyl groups having 1 to 10 carbon atoms such as trifluoromethyl group, cycloalkyl groups such as cyclopentyl group and cyclohexyl group, phenyl groups, and naphthyl groups.
- An aryl group such as a group, and a 7,7-dimethyl-2-oxobicyclo [2.2.1] heptane-1-methylene group.
- 1 to 4 hydrogen atoms of cyclopentyl group, cyclohexyl group, phenyl group and naphthyl group are alkyl groups having 1 to 4 carbon atoms such as methyl group and ethyl group, and 1 carbon atom such as methoxy group and ethoxy group.
- 1 to 4 alkoxy groups such as alkoxy groups, trifluoromethyl groups, hydroxyl groups, amino groups, sulfonic acid groups, sulfonic acid amide groups, sulfonic acid ester groups, F, Cl, Br or I, etc. A substituted one may be used.
- each R 27 may be the same or different and represents either a hydrogen atom or an organic group having 1 to 20 carbon atoms.
- Preferred examples include alkyl groups having 1 to 4 carbon atoms such as a methyl group and an ethyl group, alkoxy groups having 1 to 4 carbon atoms such as a methoxy group and an ethoxy group, and fluoroalkyls having 1 to 4 carbon atoms such as a trifluoromethyl group.
- alkyl groups having 1 to 4 carbon atoms such as a methyl group and an ethyl group
- alkoxy groups having 1 to 4 carbon atoms such as a methoxy group and an ethoxy group
- fluoroalkyls having 1 to 4 carbon atoms such as a trifluoromethyl group.
- R 28 represents an organic group having 1 to 20 carbon atoms.
- Preferred examples include alkyl groups having 1 to 18 carbon atoms such as dodecyl group, fluoroalkyl groups having 1 to 10 carbon atoms such as trifluoromethyl group, cycloalkyl groups such as cyclopentyl group and cyclohexyl group, phenyl groups, and naphthyl groups.
- An aryl group such as a group, and a 7,7-dimethyl-2-oxobicyclo [2.2.1] heptane-1-methylene group.
- 1 to 4 hydrogen atoms of cyclopentyl group, cyclohexyl group, phenyl group and naphthyl group are alkyl groups having 1 to 4 carbon atoms such as methyl group and ethyl group, and 1 carbon atom such as methoxy group and ethoxy group.
- 1 to 4 alkoxy groups such as alkoxy groups, trifluoromethyl groups, hydroxyl groups, amino groups, sulfonic acid groups, sulfonic acid amide groups, sulfonic acid ester groups, F, Cl, Br or I, etc. A substituted one may be used.
- b 10 to b 12 each represents an integer of 0 to 5.
- the content of the photoacid generator is preferably 1 part by weight or more, and more preferably 3 parts by weight or more with respect to 100 parts by weight of the entire resin in the etching mask resist composition. Moreover, 50 weight part or less is preferable and 40 weight part or less is more preferable. Within this range, there is an advantage that the mechanical properties of the heat-resistant film after the heat treatment are good.
- the etching mask resist composition of the present invention can contain the above-mentioned compound having a phenolic hydroxyl group without esterification.
- the resulting etching mask resist composition has improved solubility in an alkaline aqueous solution in the exposed portion.
- the naphthoquinone diazide compound and the compound having a phenolic hydroxyl group generate a hydrogen bond, so that the solubility in an alkaline aqueous solution is lowered. Therefore, high sensitivity can be achieved.
- the content of the compound having a phenolic hydroxyl group is preferably 1 to 40 parts by weight, more preferably 3 to 30 parts by weight with respect to 100 parts by weight of the entire resin in the etching mask resist composition.
- the compound which has a phenolic hydroxyl group may contain 2 or more types, and when it contains 2 or more types, it is preferable that those total amount is the said range.
- the mask resist composition for etching of the present invention contains at least one of the compounds represented by the following general formulas (5) and (6) from the viewpoint of etching resistance and resist removability after etching.
- R 3 , R 5 and R 7 represent a hydrogen atom or a group having a structure represented by the following general formula (7).
- 30 to 100 mol% of R 3 is a group having a structure represented by the following general formula (7). From the viewpoint of dry etching resistance, it is preferably 40 to 90 mol%, more preferably 50 to 80 mol%. Further, 30 to 100 mol% of the total amount of R 5 and R 7 is a group having a structure represented by the following general formula (7). From the viewpoint of dry etching resistance, it is preferably 40 to 90 mol%, more preferably 50 to 80 mol%.
- R 4 , R 6 and R 8 represent an organic group having 1 to 6 carbon atoms.
- X 1 is a single bond, O, S, NH, SO 2 , CO, a divalent organic group having 1 to 3 carbon atoms, or a divalent crosslinked structure formed by linking two or more thereof.
- a 1 , a 2 , a 3 , b 1 , b 2 and b 3 are integers of 1 or more
- d 1 , d 2 and d 3 are integers of 0 or more
- R 9 represents a divalent organic group having 1 to 6 carbon atoms.
- Preferred examples include alkyl groups having 1 to 6 carbon atoms such as a methyl group, an ethyl group, and a propyl group, and a group in which they are connected via an ether, thioether, amide, or ester, or a carbon number such as a trifluoromethyl group.
- Examples thereof include 1 to 6 fluoroalkyl groups, groups in which they are linked via ethers, thioethers, amides and esters, cycloalkyl groups such as cyclopentyl groups and cyclohexyl groups, and phenyl groups.
- R 10 and R 11 represent an organic group having 1 to 8 carbon atoms.
- Preferred examples include alkyl groups having 1 to 8 carbon atoms such as methyl group, ethyl group and propyl group, fluoroalkyl groups having 1 to 8 carbon atoms such as trifluoromethyl group, cycloalkyl such as cyclopentyl group and cyclohexyl group. Group, phenyl group, methoxyphenyl group and the like.
- a 4 represents an integer of 1 or more
- b 4 represents an integer of 0 or more
- a 4 + b 4 3.
- Preferred examples of (5) and (6) include those shown below, but are not limited thereto.
- the content of the compounds represented by the general formulas (5) and (6) is preferably 1 part by weight or more and more preferably 3 parts by weight or more with respect to 100 parts by weight of the entire resin in the mask resist composition for etching. . Moreover, 20 weight part or less is preferable and 10 weight part or less is more preferable. Within this range, there is an advantage that the mechanical properties of the heat-resistant film after the heat treatment are good.
- the mask resist composition for etching of the present invention may contain an alkali-soluble resin other than polyimide.
- an alkali-soluble resin other than polyimide Specifically, acrylic polymers copolymerized with acrylic acid, phenolic resins, siloxane resins, polyhydroxystyrene, resins in which cross-linking groups such as methylol groups, alkoxymethyl groups, and epoxy groups are introduced, and their copolymer polymers Etc.
- phenol resin and polyhydroxystyrene At least one selected from a phenol resin and polyhydroxystyrene.
- the phenol resin and polyhydroxystyrene referred to herein include resins in which a crosslinking group such as a methylol group, an alkoxymethyl group, or an epoxy group is introduced.
- the copolymer of a phenol resin and polyhydroxystyrene is also included.
- Such a resin is soluble in an aqueous alkali solution such as tetramethylammonium hydroxide, choline, triethylamine, dimethylaminopyridine, monoethanolamine, diethylaminoethanol, sodium hydroxide, potassium hydroxide, sodium carbonate.
- an aqueous alkali solution such as tetramethylammonium hydroxide, choline, triethylamine, dimethylaminopyridine, monoethanolamine, diethylaminoethanol, sodium hydroxide, potassium hydroxide, sodium carbonate.
- Preferred phenol resins include novolak resins and resol resins, which can be obtained by polycondensation of various phenols alone or a mixture of a plurality of them with aldehydes such as formalin.
- phenols constituting the novolak resin and the resol resin include phenol, p-cresol, m-cresol, o-cresol, 2, 3-dimethylphenol, 2, 4-dimethylphenol, 2, 5-dimethylphenol, 2 , 6-dimethylphenol, 3,4-dimethylphenol, 3,5-dimethylphenol, 2,3,4-trimethylphenol, 2,3,5-trimethylphenol, 3,4,5-trimethylphenol, 2,4 , 5-trimethylphenol, methylene bisphenol, methylene bis p-cresol, resorcin, catechol, 2-methyl resorcin, 4-methyl resorcin, o-chlorophenol, m-chlorophenol, p-chlorophenol, 2,3-dichlorophenol, m-metoki Siphenol, p-methoxyphenol, p-butoxyphenol, o-ethylphenol, m-ethylphenol, p-ethylphenol, 2,3-diethylphenol,
- the aldehydes include paraformaldehyde, acetaldehyde, benzaldehyde, hydroxybenzaldehyde, chloroacetaldehyde and the like, and these can be used alone or as a mixture of a plurality of them.
- the phenol resin used in the present invention comprises 1 to 4 hydrogen atoms added to an aromatic ring, an alkyl group having 1 to 20 carbon atoms, a fluoroalkyl group, an alkoxyl group, an ester group, a nitro group, a cyano group, A structure substituted with a fluorine atom or a chlorine atom may also be used.
- the weight average molecular weight of the phenol resin used in the present invention is in the range of 2,000 to 50,000, preferably 3,000 to 30,000 in terms of polystyrene using gel permeation chromatography (GPC). preferable.
- GPC gel permeation chromatography
- Preferred polyhydroxystyrenes include aromatics having a phenolic hydroxyl group such as p-hydroxystyrene, m-hydroxystyrene, o-hydroxystyrene, p-isopropenylphenol, m-isopropenylphenol, o-isopropenylphenol and the like.
- Polymers or copolymers obtained by polymerizing vinyl compounds alone or in a known manner, and aromatic vinyls such as styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene A polymer or copolymer obtained by subjecting a compound alone or a part of a polymer or copolymer obtained by polymerizing two or more types to a known method to add an alkoxy group to the polymer or copolymer. Coalescence is mentioned.
- the polyhydroxystyrene used in the present invention includes 1 to 4 hydrogen atoms added to an aromatic ring, an alkyl group having 1 to 20 carbon atoms, a fluoroalkyl group, an alkoxyl group, an ester group, a nitro group, and a cyano group.
- the weight average molecular weight of the polyhydroxystyrene used in the present invention is preferably in the range of 3,000 to 60,000 in terms of polystyrene using gel permeation chromatography (GPC), and 3,000 to 25,000. More preferably, it is the range.
- GPC gel permeation chromatography
- the molecular weight is 3,000 or more, the pattern shape, resolution, developability and heat resistance are excellent, and when the molecular weight is 60,000 or less, sufficient sensitivity can be maintained.
- the content of these phenolic resin and polyhydroxystyrene in the etching mask resist composition is preferably 5 to 50 parts by weight out of 100 parts by weight of the whole resin in the etching mask resist composition. More preferably, it is a part. When it is 50 parts by weight or less, the heat resistance and strength of the heat-resistant film after the heat treatment can be maintained, and when it is 10 parts by weight or more, the pattern formability of the resin film is further improved.
- the etching mask resist composition of the present invention may contain a silane coupling agent as necessary. By containing the silane coupling agent, it is possible to improve the adhesion to the base substrate during the formation of the cured film.
- silane coupling agent examples include vinyltrimethoxysilane, vinyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycol.
- the content of the silane coupling agent is preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the entire resin in the etching mask resist composition.
- the amount is more preferably 0.2 to 5 parts by weight, still more preferably 0.3 to 3 parts by weight.
- the etching mask resist composition of the present invention may contain a solvent.
- Solvents include polar aprotic solvents such as N-methyl-2-pyrrolidone, ⁇ -butyrolactone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, tetrahydrofuran, dioxane, propylene glycol monomethyl ether, etc.
- ketones such as acetone, methyl ethyl ketone, diisobutyl ketone and diacetone alcohol
- esters such as ethyl acetate, propylene glycol monomethyl ether acetate and ethyl lactate
- aromatic hydrocarbons such as toluene and xylene. Two or more of these may be contained.
- the content of the solvent is preferably 50 parts by weight or more, more preferably 100 parts by weight or more, and preferably 5000 parts by weight or less, based on 100 parts by weight of the entire resin in the etching mask resist composition. Preferably it is 3000 parts by weight or less.
- the etching mask resist composition of the present invention may contain a surfactant. By containing the surfactant, coating unevenness is improved and a uniform coating film is obtained. Fluorine-based surfactants and silicone-based interface chemicals are preferably used.
- fluorosurfactant examples include 1,1,2,2-tetrafluorooctyl (1,1,2,2-tetrafluoropropyl) ether, 1,1,2,2-tetrafluorooctyl. Hexyl ether, octaethylene glycol di (1,1,2,2-tetrafluorobutyl) ether, hexaethylene glycol (1,1,2,2,3,3-hexafluoropentyl) ether, octapropylene glycol di (1 , 1,2,2-tetrafluorobutyl) ether, hexapropylene glycol di (1,1,2,2,3,3-hexafluoropentyl) ether, sodium perfluorododecyl sulfonate, 1,1,2,2 , 8,8,9,9,10,10-decafluorododecane, 1,1,2,2,3,3-hexafluorodecane, N- [3- (Perf Oloocty
- silicone surfactants examples include SH28PA, SH7PA, SH21PA, SH30PA, ST94PA (all manufactured by Toray Dow Corning Silicone Co., Ltd.), BYK-333 (manufactured by Big Chemie Japan Co., Ltd.), and the like. It is done.
- the content of the surfactant is generally 0.0001 to 1% by weight in the etching mask resist composition.
- the etching mask resist composition of the present invention may contain a compound that absorbs in the ultraviolet region used as the exposure wavelength and does not fade by the light.
- a compound that absorbs in the ultraviolet region used as the exposure wavelength and does not fade by the light when such a compound is contained, when the resulting positive photosensitive resin composition is exposed to perform pattern formation, the exposure wavelength irradiated from the exposure machine is absorbed, and therefore excessive light due to reflected light from the substrate. Exposure and halation can be prevented, and the adhesion of unexposed areas during development can be improved.
- Examples of the compound having the above absorption characteristics include a coumarin derivative, a benzotriazole derivative, a hydroxybenzophenone derivative, an anthraquinone derivative, and an acenaphthene derivative.
- Examples of coumarin derivatives include coumarin, coumarin-4 (above, trade name, Sigma Aldrich Japan Co., Ltd.), 4-hydroxycoumarin, 7-hydroxycoumarin (above, Tokyo Chemical Industry Co., Ltd.), and benzotriazole derivatives.
- Sumisorb 200, Sumisorb 250, Sumisorb 320, Sumisorb 340, Sumisorb 350 (above, trade name, manufactured by Sumitomo Chemical Co., Ltd.), and hydroxybenzophenone derivatives include Sumisorb 130, Sumisorb 140 (over trade name, Sumitomo Chemical ( Manufactured by Co., Ltd.), disilizer M, disilizer O (trade name, manufactured by Sankyo Kasei Co., Ltd.), seesorb 103 (manufactured by Cypro Kasei Co., Ltd.), anthraquinone derivatives include 1-hydroxyanthraquinone, 2-hydroxyanthraquinone, 3 -Hydroxyanthra Non, 1-hydroxy-2-methoxyanthraquinone, 1,2-dihydroxyanthraquinone, 1,3-dihydroxyanthraquinone, 1,4-dihydroxyanthraquinone, 1,5-dihydroxyanthraquinone, 1,8
- the mask resist composition for etching according to the present invention is optionally added with a crosslinking agent, a crosslinking accelerator, a sensitizer, a thermal radical generator, a dissolution accelerator, a dissolution inhibitor, a stabilizer, an antifoaming agent, and the like.
- a crosslinking agent e.g., a crosslinking accelerator, a sensitizer, a thermal radical generator, a dissolution accelerator, a dissolution inhibitor, a stabilizer, an antifoaming agent, and the like.
- An agent can also be contained.
- a method for producing a patterned substrate using the etching mask resist composition of the present invention includes a step of providing a coating of the above-described etching mask resist composition, a step of forming a cured pattern of the coating, It has the process of pattern-processing a board
- the etching mask resist composition of the present invention is applied onto a substrate by a known method such as a spin coating method or a slit coating method.
- sapphire Al 2 O 3
- silicon Si
- silicon oxide SiO 2
- silicon nitride SiN
- gallium nitride GaN
- silicon carbide SiC
- gallium arsenide GaAs
- phosphorus The group consisting of indium phosphide (InP), aluminum nitride (AlN), tantalum nitride (TaN), lithium tantalate (LiTaO 3 ), boron nitride (BN), titanium nitride (TiN), and barium titanate (BaTiO 3 ) More preferred substrates are preferred.
- Application methods include spin coating using a spinner, spray coating, and roll coating.
- the coating film thickness varies depending on the coating method, the solid content concentration of the composition, the viscosity, and the like, but it is usually preferable that the film thickness after drying is 0.1 to 150 ⁇ m.
- the substrate can be pretreated with the above-mentioned silane coupling agent.
- Surface treatment is performed by spin coating, dipping, spray coating, steam treatment or the like. In some cases, a heat treatment is subsequently performed at 50 ° C. to 300 ° C. to advance the reaction between the substrate and the silane coupling agent.
- the substrate coated with the etching mask resist composition is dried to obtain a resin composition film. Drying is preferably performed using an oven, a hot plate, infrared rays, or the like in the range of 50 ° C. to 150 ° C. for 1 minute to several hours.
- the mask resist composition film for etching is exposed to actinic radiation through a mask having a desired pattern.
- Actinic rays used for exposure include ultraviolet rays, visible rays, electron beams, and X-rays.
- light having a wavelength of 350 nm or more and 450 nm or less is preferable, i-ray (wavelength 365 nm), h-ray (wavelength 405 nm) of a mercury lamp. ), G-line (wavelength 436 nm) is preferably used.
- the exposed portion is removed using a developer after exposure.
- a developer an alkali developer is preferable, tetramethylammonium hydroxide, diethanolamine, diethylaminoethanol, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, triethylamine, diethylamine, methylamine, dimethylamine, dimethylaminoethyl acetate, An aqueous solution of a compound exhibiting alkalinity such as dimethylaminoethanol, dimethylaminoethyl methacrylate, cyclohexylamine, ethylenediamine, and hexamethylenediamine is preferred.
- these alkaline aqueous solutions may contain polar solvents such as N-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, ⁇ -butyrolactone, dimethylacrylamide, methanol, ethanol, Alcohols such as isopropanol, esters such as ethyl lactate and propylene glycol monomethyl ether acetate, ketones such as cyclopentanone, cyclohexanone, isobutyl ketone, and methyl isobutyl ketone may be added singly or in combination. Good. After development, it is preferable to rinse with water. Here, alcohols such as ethanol and isopropyl alcohol, and esters such as ethyl lactate and propylene glycol monomethyl ether acetate may be added to water for rinsing treatment.
- polar solvents such as N-methyl-2-pyrrolidone, N, N-d
- a cured pattern can be obtained by curing the obtained mask resist composition film pattern for etching.
- the cured pattern is formed by curing for 30 seconds to 2 hours in the range of 100 to 450 ° C. with a heating device such as a hot plate or oven.
- the temperature is preferably 120 to 250 ° C, more preferably 180 to 230 ° C.
- the cross-sectional shape of the cured pattern is preferably not a rectangle but a curved surface, and particularly preferably a semicircular shape.
- semicircular light scattering is increased and the light extraction efficiency of the light-emitting element can be improved.
- the semicircular shape refers to a state in which the pattern height in the cross-sectional shape is equal to or less than the length of the pattern base, and the cross-sectional shape is formed by a curve of convex protrusions.
- a desired concavo-convex pattern can be provided on the substrate by performing an etching process using the cured pattern formed by the etching mask resist composition of the present invention as a mask.
- Etching methods include wet etching with a solution and dry etching with a gas, but dry etching is preferably used from the viewpoint of in-plane uniformity of the resulting uneven pattern.
- boron trichloride BCl 3
- chlorine Cl 2
- carbon tetrafluoride CF 4
- trifluoromethane CHF 3
- 4- (difluoromethylene) -2, 3 , 3-trifluoro-1- (trifluoromethyl) cyclobutene (C 6 F 8 ), hexafluoroantimony (SbF 6 ), oxygen (O 2 ), argon (Ar), etc. are used. From the viewpoint of properties, it is preferable to use chlorine or boron trichloride.
- the temperature during dry etching is preferably 100 ° C. to 250 ° C., more preferably 120 ° C. to 230 ° C., and most preferably 150 ° C. to 200 ° C. preferable.
- the cross-sectional shape of the concavo-convex pattern of the substrate after etching is preferably not a rectangle but a curved surface, and particularly preferably a semicircular shape.
- semicircular By being semicircular, light scattering is increased and the light extraction efficiency of the light-emitting element can be improved.
- the semicircular shape refers to a state in which the pattern height in the cross-sectional shape is equal to or less than the length of the pattern base, and the cross-sectional shape is formed by a curve of convex protrusions.
- the cross-sectional shape of the cured pattern serving as a mask is a semicircular shape, so that the cross-sectional shape of the concavo-convex pattern of the substrate after etching can be a semicircular shape.
- the cured pattern formed by the etching mask resist composition of the present invention and the resist residue after the dry etching treatment are removed after the dry etching using a resist stripping solution.
- a removal method it is preferable to immerse in a resist stripping solution at room temperature to 100 ° C. for 5 seconds to 24 hours by a method such as showering, dipping, or paddle.
- a known resist stripping solution can be used as the resist stripping solution.
- Specific examples include stripping solution 104, stripping solution 105, stripping solution 106, SST-3 (above, trade name, manufactured by Tokyo Ohka Kogyo Co., Ltd.). , EKC-265, EKC-270, EKC-270T (above, trade name, manufactured by DuPont), N-300, N-321 (above, trade name, manufactured by Nagase ChemteX Corporation), etc. .
- dry baking can be performed in a range of 50 ° C. to 150 ° C. with a heating device such as a hot plate or oven.
- a light emitting layer can be formed on the concavo-convex surface of the substrate on which the concavo-convex pattern processed using the etching mask resist composition of the present invention is formed, thereby manufacturing a light emitting diode.
- the light emitting layer include at least one layer selected from the group consisting of a buffer layer made of GaN or AlN, an n-type GaN layer, a clad layer made of InGaN light emitting layer or p-type AlGaN, and a p-type GaN contact layer. It is done.
- the processed sapphire substrate is mounted on a metalorganic vapor phase growth apparatus (MOCVD apparatus, Metal Organic Chemical Deposition), and is thermally cleaned at a high temperature of 1000 ° C. or higher in a nitrogen gas main component atmosphere, and a GaN low temperature buffer A layer, an n-GaN layer, an InGaN layer, a p-AlGaN layer, and a p-GaN layer are grown in this order. Thereafter, n-GaN is exposed by etching, and electrodes are formed on the n-GaN layer and the p-GaN layer, respectively.
- the substrate on which the electrode is formed can be made into an LED light emitting element by performing element separation by dicing.
- the resin composition of the present invention is also suitably used as a photoresist for dry etching for the purpose of exposing the n-GaN layer.
- NMP N-methyl-2-pyrrolidone
- GBL ⁇ -butyrolactone
- the imide group equivalent is calculated as follows.
- the number of imide groups in the structural unit is A (mol), and the molecular weight of the structural unit is B (g).
- the imide group equivalent is a value represented by A / B.
- etching mask resist composition is spin-coated on a single crystal sapphire wafer having a diameter of 2 inches using a spin coater (1H-360S manufactured by Mikasa Co., Ltd.) at an arbitrary rotation number, and then hot plate (ASONE). HP-1SA) was used for pre-baking at 120 ° C. for 3 minutes to prepare an etching mask resist composition film having a thickness of 3.0 ⁇ m.
- the prepared composition film was exposed at an exposure amount of 0 to 500 mJ / cm 2 in 20 mJ / cm 2 steps using an i-line stepper (NSR-2009i9C manufactured by Nikon Corporation).
- the reticle used for the exposure was a line & space pattern with 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 30, 50, 100 ⁇ m.
- Shape of cured post-curing pattern (4) Development is performed by the same method, and this substrate is cured at a predetermined temperature and time using a hot plate (HP-1SA manufactured by ASONE Co., Ltd.) to form a cured pattern. Went. A cross section of a 3 ⁇ m line pattern at an exposure amount of photosensitivity + 20 mJ / cm 2 was observed by SEM.
- a cured pattern is formed by the same method as in (5), and this patterned sapphire substrate is subjected to a predetermined temperature using a dry etching apparatus (RIE-200NL-101iPH manufactured by Samco Corporation). And etched with boron trichloride.
- RIE-200NL-101iPH manufactured by Samco Corporation
- the etching selectivity is (T 1 ⁇ T 2 ) / T 3 . The higher the selectivity, the higher the resistance.
- PI-01 polyimide
- the imide group equivalent of PI-01 was 0.0032 mol / g, and the weight average molecular weight was 40000.
- Synthesis Example 2 Synthesis of Polyimide (PI-02) 2,2 ′, 3,3′-biphenyltetracarboxylic dianhydride (manufactured by Toray Fine Chemical Co., Ltd.) instead of 15.5 g (0.05 mol) of ODPA A polyimide (PI-02) was obtained in the same manner as in Synthesis Example 1 except that 14.7 g (0.05 mol) of i-BPDA was added.
- PI-02 had an imide group equivalent of 0.0033 mol / g and a weight average molecular weight of 35,000.
- Synthesis Example 3 Synthesis of polyimide (PI-03) 10.9 g (0.05 mol) of pyromellitic anhydride (manufactured by Daicel Chemical Industries, Ltd., PMDA) was added instead of 15.5 g (0.05 mol) of ODPA. Except for the above, polyimide (PI-03) was obtained in the same manner as in Synthesis Example 1. PI-03 had an imide group equivalent of 0.0037 mol / g and a weight average molecular weight of 50,000.
- Synthesis Example 4 Synthesis of polyimide (PI-04) 1,2,5,6-naphthalenetetracarboxylic dianhydride (manufactured by Tokyo Chemical Industry Co., Ltd.) instead of 15.5 g (0.05 mol) of ODPA A polyimide (PI-04) was obtained in the same manner as in Synthesis Example 1 except that 4 g (0.05 mol) was added. PI-04 had an imide group equivalent of 0.0034 mol / g and a weight average molecular weight of 40,000.
- Synthesis Example 5 Synthesis of polyimide (PI-05) 2,2-bis [4- (3,4-dicarboxyphenoxy) phenyl] propane dianhydride (Tokyo) instead of 15.5 g (0.05 mol) of ODPA A polyimide (PI-05) was obtained in the same manner as in Synthesis Example 1 except that 26.0 g (0.05 mol) manufactured by Kasei Co., Ltd. was added. PI-05 had an imide group equivalent of 0.0024 mol / g and a weight average molecular weight of 45,000.
- (Synthesis Example) 8 Synthesis of Polyimide (PI-08) Synthesis Example 1 except that 1.93 g (0.01 mol) of 2-aminoanthracene was added instead of 1.09 g (0.01 mol) of 3-aminophenol. In the same manner, polyimide (PI-08) was obtained. PI-08 had an imide group equivalent of 0.0032 mol / g and a weight average molecular weight of 41,000.
- Synthesis Example 14 Synthesis of Novolak Resin (NV-01) Under a stream of dry nitrogen, 57 g (0.6 mol) of metacresol, 38 g (0.4 mol) of paracresol, 75.5 g of a 37 wt% aqueous formaldehyde solution (formaldehyde 0) .93 mol), 0.63 g (0.005 mol) of oxalic acid dihydrate, and 264 g of methyl isobutyl ketone, and then immersed in an oil bath to conduct a polycondensation reaction for 4 hours while refluxing the reaction solution. It was.
- Example 1 10 g (100 parts by weight) of the polyimide (PI-01) obtained in Synthesis Example 1, 2.0 g (20 parts by weight) of the naphthoquinonediazide compound (QD-01) obtained in Synthesis Example 9, and 41. After mixing and stirring 3 g, it was filtered through a 0.5 ⁇ m filter to prepare an etching mask resist composition. This composition was evaluated by the evaluation methods (1) to (7). Curing conditions for forming the cured pattern (resist curing conditions) were 160 ° C. for 5 minutes, and the temperature during dry etching was 150 ° C. The results are shown in Table 1.
- Example 1 shows the composition, resist curing conditions, temperature during dry etching, and evaluation results.
- the compounds PAG-01 and PHH-01 in Table 1 are compounds having the following structures, respectively.
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Abstract
Description
(A)ポリイミドは、本発明のエッチング用マスクレジスト組成物における樹脂成分である。本発明において(A)ポリイミドは、一般式(1)で表される構造単位を主成分とする。
一般式(1)中、R1はジアミン残基を表す。ジアミン残基は、現像液であるアルカリ水溶液に対する溶解性、感光性能の点からヒドロキシル基を有するジアミン残基であることが好ましい。
一般式(1)中、R2はトリ-またはテトラ-カルボン酸残基(以下、「酸残基」という)を表す。
本発明に用いられる(A)ポリイミドは、ポリマー末端が酸無水物、モノカルボン酸化合物、酸クロリド化合物およびモノアミン化合物などの末端封止剤により封止されたものであっても良い。ポリマーの末端を封止することで、ポリマーのアルカリ水溶液に対する溶解速度を好ましい範囲に調整することができる。
本発明のエッチング用マスクレジスト組成物は、(B)光酸発生剤を含有する。これにより、露光部が現像液であるアルカリ水溶液に除去されるポジ型のパターンを形成することができる。
さらに本発明のエッチング用マスクレジスト組成物はエッチング耐性、エッチング後のレジスト除去性の観点から下記(C)一般式(5)、(6)で示される化合物の少なくとも1つを含むことが好ましい。
本発明のエッチング用マスクレジスト組成物は、ポリイミド以外のアルカリ可溶性樹脂を含有してもよい。具体的には、アクリル酸を共重合したアクリルポリマー、フェノール樹脂、シロキサン樹脂、ポリヒドロキシスチレン、またそれらにメチロール基、アルコキシメチル基やエポキシ基などの架橋基を導入した樹脂、それらの共重合ポリマーなどが挙げられる。
本発明のエッチング用マスクレジスト組成物は必要に応じて、シランカップリング剤を含有しても良い。シランカップリング剤を含有することで、硬化膜形成時に、下地基材との密着性を高めることができる。
より好ましくは0.2~5重量部、さらに好ましくは0.3~3重量部である。
本発明のエッチング用マスクレジスト組成物の製造方法について説明する。ポリイミドやフェノール樹脂等の樹脂成分、光酸発生剤、その他の添加剤を溶媒に加えて溶解させる。順番としては樹脂成分を溶解させた後、他成分を溶解させるのが好ましい。溶解温度は-5~60℃、好ましくは10~50℃、より好ましくは20~40℃である。必要により溶媒を追加して希釈し、組成物の粘度を調整する。その後、常温で1~24時間静置して脱泡し、0.1~10μmのポアサイズのフィルターで濾過して異物を除去する。
本発明のエッチング用マスクレジスト組成物を用いた、パターン加工された基板の製造方法は、上述のエッチング用マスクレジスト組成物の被膜を設ける工程、前記被膜の硬化パターンを形成する工程、前記被膜の硬化パターンをマスクにしてエッチングにより基板をパターン加工する工程、ならびに前記被膜の硬化パターンを除去する工程を有する。
本発明のエッチング用マスクレジスト組成物を用いて加工した凹凸パターンが形成された基板の凹凸面上に発光層を形成して、発光ダイオードを製造することができる。
GBL:γ-ブチロラクトン
各評価は以下の方法で行った。
イミド基当量については以下のように算出される。構造単位中のイミド基数をA(モル)、構造単位の分子量をB(g)とする。
GPC(ゲルパーミエーションクロマトグラフィー)装置Waters2690-996(日本ウォーターズ(株)製)を用い、展開溶媒をN-メチル-2-ピロリドンとして測定し、ポリスチレン換算で重量平均分子量(Mw)を計算した。
光干渉式膜厚計(大日本スクリーン製造(株)製ラムダエースSTM-602)を用いて、屈折率1.629で測定した。
エッチング用マスクレジスト組成物を直径2インチの単結晶サファイアウェハーにスピンコーター(ミカサ(株)製1H-360S)を用いて任意の回転数でスピンコートした後、ホットプレート(アズワン(株)製HP-1SA)を用いて120℃で3分間プリベークし、膜厚3.0μmのエッチング用マスクレジスト組成物被膜を作製した。
(4)同様の方法によって現像まで行い、この基板をホットプレート(アズワン(株)製HP-1SA)を用いて所定の温度、時間でキュアして硬化パターン形成を行った。感光感度+20mJ/cm2の露光量における3μmのラインパターンの断面をSEMで観察し、断面が半円状であれば良、そうでなければ不良とした。
(5)と同様の方法によって硬化パターンの形成まで行い、このパターン付きサファイア基板をドライエッチング装置(サムコ(株)製RIE-200NL-101iPH)を用いて、所定の温度下において三塩化ボロンでエッチングした。
ドライエッチング後の硬化パターンを、剥離液106(東京応化工業(株)製、モノエタノールアミン:ジメチルスルホキシド=70:30)に常温で浸漬後、水で30秒間リンスを行った。その後、光学顕微鏡(ニコン(株)製OPTISHOT300)を用いて、基板上のエッチング用マスクレジスト組成物被膜パターンの残留有無を観察し、パターンを除去するのに最低必要な浸漬時間が短いほど、良好な除去性とした。
乾燥窒素気流下、2,2-ビス(3-アミノ-4-ヒドロキシフェニル)ヘキサフルオロプロパン(セントラル硝子(株)製、BAHF)15.9g(0.043モル)、1,3-ビス(3-アミノプロピル)テトラメチルジシロキサン(SiDA)0.62g(0.0025モル)をNMP130gに溶解した。ここに3,3’,4,4’-ジフェニルエーテルテトラカルボン酸二無水物(マナック(株)製、ODPA)15.5g(0.05モル)をNMP50gとともに加えて、40℃で2時間撹拌した。その後、3-アミノフェノール(東京化成(株)製)1.09g(0.01モル)を加え、40℃で2時間撹拌した。さらに、200℃で6時間撹拌を続けた。撹拌終了後、溶液を水2Lに投入して、ポリマー固体の沈殿をろ過で集めた。さらに水2Lで3回洗浄を行い、集めたポリマー固体を50℃の真空乾燥機で72時間乾燥し、ポリイミド(PI-01)を得た。PI-01のイミド基当量は0.0032モル/gであり、重量平均分子量は40000であった。
ODPA15.5g(0.05モル)の代わりに2,2’,3,3’-ビフェニルテトラカルボン酸二無水物(東レファインケミカル(株)製、i-BPDA)14.7g(0.05モル)を加えた以外は合成例1と同様にしてポリイミド(PI-02)を得た。PI-02のイミド基当量は0.0033モル/gであり、重量平均分子量は35000であった。
ODPA15.5g(0.05モル)の代わりに無水ピロメリット酸(ダイセル化学(株)製、PMDA)10.9g(0.05モル)を加えた以外は合成例1と同様にしてポリイミド(PI-03)を得た。PI-03のイミド基当量は0.0037モル/gであり、重量平均分子量は50000であった。
ODPA15.5g(0.05モル)の代わりに1,2,5,6-ナフタレンテトラカルボン酸二無水物(東京化成(株)製)13.4g(0.05モル)を加えた以外は合成例1と同様にしてポリイミド(PI-04)を得た。PI-04のイミド基当量は0.0034モル/gであり、重量平均分子量は40000であった。
ODPA15.5g(0.05モル)の代わりに2,2-ビス[4-(3,4-ジカルボキシフェノキシ)フェニル]プロパン二無水物(東京化成(株)製)26.0g(0.05モル)を加えた以外は合成例1と同様にしてポリイミド(PI-05)を得た。PI-05のイミド基当量は0.0024モル/gであり、重量平均分子量は45000であった。
BAHF15.9g(0.043モル)、3-アミノフェノール1.09g(0.01モル)の代わりにBAHF17.4g(0.047モル)、3-アミノフェノール0.109g(0.001モル)を加えた以外は合成例1と同様にしてポリイミド(PI-06)を得た。PI-06のイミド基当量は0.0032モル/gであり、重量平均分子量は90000であった。
BAHF15.9g(0.043モル)、3-アミノフェノール1.09g(0.01モル)の代わりにBAHF11.1g(0.03モル)、3-アミノフェノール3.82g(0.035モル)を加えた以外は合成例1と同様にしてポリイミド(PI-07)を得た。PI-07のイミド基当量は0.0033モル/gであり、重量平均分子量は4000であった。
3-アミノフェノール1.09g(0.01モル)の代わりに2-アミノアントラセン1.93g(0.01モル)を加えた以外は合成例1と同様にしてポリイミド(PI-08)を得た。PI-08のイミド基当量は0.0032モル/gであり、重量平均分子量は41000であった。
3-アミノフェノール1.09g(0.01モル)、ODPA15.5g(0.05モル)の代わりに2-アミノアントラセン1.93g(0.01モル)、2,2’,3,3’-ビフェニルテトラカルボン酸二無水物(東レファインケミカル(株)製、i-BPDA)14.7g(0.05モル)を加えた以外は合成例1と同様にしてポリイミド(PI-09)を得た。PI-09のイミド基当量は0.0033モル/gであり、重量平均分子量は37000であった。
乾燥窒素気流下、BAHF15.9g(0.043モル)、SiDA0.62g(0.0025モル)をNMP200gに溶解した。ここにODPA15.5g(0.05モル)をNMP50gとともに加えて、40℃で2時間撹拌した。その後、3-アミノフェノール1.09g(0.01モル)を加え、40℃で2時間撹拌した。さらに、ジメチルホルアミドジメチルアセタール(三菱レイヨン(株)製、DFA)3.57g(0.03モル)をNMP5gで希釈した溶液を10分かけて滴下し、滴下後、40℃で2時間、ついで100℃で0.5時間撹拌を続けた。撹拌終了後、溶液を水2Lに投入して、ポリマー固体の沈殿をろ過で集めた。さらに水2Lで3回洗浄を行い、集めたポリマー固体を50℃の真空乾燥機で72時間乾燥し、ポリイミド前駆体(PAE-01)を得た。このポリイミド前駆体の重量平均分子量は42000であった。
BAHF18.3g(0.05モル)をアセトン100mL、プロピレンオキシド(東京化成(株)製)17.4g(0.3モル)に溶解させ、-15℃に冷却した。ここに3-ニトロベンゾイルクロリド(東京化成(株)製)20.4g(0.11モル)をアセトン100mLに溶解させた溶液を滴下した。滴下終了後、-15℃で4時間撹拌し、その後室温に戻した。析出した白色固体をろ別し、50℃で真空乾燥した。
乾燥窒素気流下、合成例11で得られたヒドロキシル基含有ジアミン化合物(DA-01)25.7g(0.043モル)、SiDA0.62g(0.0025モル)をNMP200gに溶解した。ここにODPA15.5g(0.05モル)をNMP50gとともに加えて、40℃で2時間撹拌した。その後、4-エチニルアニリン(東京化成(株)製)1.17g(0.01モル)を加え、40℃で2時間撹拌した。さらに、DFA3.57g(0.03モル)をNMP5gで希釈した溶液を10分かけて滴下し、滴下後、40℃で2時間撹拌を続けた。撹拌終了後、溶液を水2Lに投入して、ポリマー固体の沈殿をろ過で集めた。さらに水2Lで3回洗浄を行い、集めたポリマー固体を50℃の真空乾燥機で72時間乾燥し、ポリイミド前駆体(PAE-02)を得た。このポリイミド前駆体の重量平均分子量は45000であった。
乾燥窒素気流下、TrisP-PA(商品名、本州化学工業(株)製)21.23g(0.05mol)と4-ナフトキノンジアジドスルホニル酸クロリド37.62g(0.14mol)を1,4-ジオキサン450gに溶解させ、室温とした。ここに、1,4-ジオキサン50gと混合させたトリエチルアミン15.58g(0.154mol)を系内が35℃以上にならないように滴下した。滴下後30℃で2時間攪拌した。トリエチルアミン塩を濾過し、濾液を水に投入させた。その後、析出した沈殿を濾過で集めた。この沈殿を真空乾燥機で乾燥させ、下記構造のナフトキノンジアジド化合物(QD-01)を得た。
乾燥窒素気流下、メタクレゾール57g(0.6モル)、パラクレゾール38g(0.4モル)、37重量%ホルムアルデヒド水溶液75.5g(ホルムアルデヒド0.93モル)、シュウ酸二水和物0.63g(0.005モル)、メチルイソブチルケトン264gを仕込んだ後、油浴中に浸し、反応液を還流させながら、4時間重縮合反応を行った。その後、油浴の温度を3時間かけて昇温し、その後に、フラスコ内の圧力を30~50mmHgまで減圧し、揮発分を除去し、溶解している、樹脂を室温まで冷却して、アルカリ可溶性のノボラック樹脂(NV-01)のポリマー固体85gを得た。
合成例1で得られたポリイミド(PI-01)10g(100重量部)、合成例9で得られたナフトキノンジアジド化合物(QD-01)2.0g(20重量部)、溶剤としてGBLを41.3g混合、攪拌した後、0.5μmのフィルターで濾過してエッチング用マスクレジスト組成物を調製した。この組成物について前記(1)~(7)の評価方法にて評価を実施した。硬化パターン形成のキュア条件(レジスト硬化条件)は160℃で5分、ドライエッチング時の温度は150℃とした。結果を表1に示す。
実施例1と同様に、エッチング用マスクレジスト組成物を調整し、評価を行った。組成、レジスト硬化条件、ドライエッチング時の温度、各評価結果を表1に示す。なお、表1中の化合物PAG-01、PHH-01はそれぞれ下記構造の化合物である。
Claims (17)
- ポリイミド(A)の重量平均分子量が5000~80000であることを特徴とする請求項1記載のエッチング用マスクレジスト組成物。
- (B)光酸発生剤がキノジアジド化合物およびオニウム塩を含むことを特徴とする請求項1~3のいずれか記載のエッチング用マスクレジスト組成物。
- さらに(C)一般式(5)、(6)から選ばれた少なくとも1つを含むことを特徴とする請求項1~4のいずれか記載のエッチング用マスクレジスト組成物。
- さらに(D)フェノール樹脂、ポリヒドロキシスチレンから選ばれる少なくとも1つを含むことを特徴とする請求項1~5のいずれか記載のエッチング用マスクレジスト組成物。
- 請求項1~8のいずれか記載のエッチング用マスクレジスト組成物の被膜を設ける工程、
前記被膜の硬化パターンを形成する工程、
前記被膜の硬化パターンをマスクにしてエッチングにより基板をパターン加工する工程、
ならびに前記被膜の硬化パターンを除去する工程を有するパターン加工された基板の製造方法。 - 基板がアルミニウム、シリコン、チタン、タンタル、ガリウム、ゲルマニウム、鉄、ニッケル、亜鉛、インジウム、ホウ素、マンガン、リン、コバルトおよびジルコニウムからなる群より選ばれる少なくとも1種の元素を含む請求項9記載の基板の製造方法。
- 基板がサファイア(Al2O3)、シリコン(Si)、酸化シリコン(SiO2)、窒化シリコン(SiN)、窒化ガリウム(GaN)、炭化シリコン(SiC)、ヒ素化ガリウム(GaAs)、リン化インジウム(InP)、窒化アルミニウム(AlN)、窒化タンタル(TaN)、タンタル酸リチウム(LiTaO3)、窒化ホウ素(BN)、窒化チタン(TiN)、および、チタン酸バリウム(BaTiO3)からなる群より選ばれるものである請求項10記載の基板の製造方法。
- 樹脂組成物の被膜をパターン加工する工程が、波長350nm以上450nm以下の光を用いてパターン露光する工程、および現像する工程を含む請求項9~11いずれかに記載の基板の製造方法。
- 樹脂組成物の被膜のパターンの断面形状が半円状である請求項9~12のいずれか記載の基板の製造方法。
- エッチングがドライエッチングであることを特徴とする請求項9~13のいずれか記載の基板の製造方法。
- エッチングガスが塩素、三塩化ボロンから選ばれる少なくとも1種類を含んでいることを特徴とする請求項14記載の基板の製造方法。
- ドライエッチング時の温度が100℃~250℃である請求項14または15記載の基板の製造方法。
- 請求項9~16のいずれか記載の方法で得られた基板上に、GaNまたはAlNからなるバッファー層、n型GaN層、InGaN発光層、p型AlGaNクラッド層、p型GaNコンタクト層からなる群より選ばれる少なくとも1層を製膜する工程を含む発光素子の製造方法。
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JP2019131704A (ja) * | 2018-01-31 | 2019-08-08 | 東レ株式会社 | 仮保護膜用樹脂組成物、およびこれを用いた半導体電子部品の製造方法 |
JP7052384B2 (ja) | 2018-01-31 | 2022-04-12 | 東レ株式会社 | 仮保護膜用樹脂組成物、およびこれを用いた半導体電子部品の製造方法 |
TWI722866B (zh) * | 2019-04-15 | 2021-03-21 | 日商信越化學工業股份有限公司 | 正型感光性樹脂組成物、圖案形成方法、硬化被膜形成方法、層間絕緣膜、表面保護膜、及電子零件 |
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CN108700808A (zh) | 2018-10-23 |
JPWO2017164103A1 (ja) | 2019-01-24 |
KR20180124839A (ko) | 2018-11-21 |
CN108700808B (zh) | 2024-04-05 |
TW201734646A (zh) | 2017-10-01 |
TWI714740B (zh) | 2021-01-01 |
KR102344939B1 (ko) | 2021-12-28 |
JP6973070B2 (ja) | 2021-11-24 |
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