WO2016010077A1 - ネガ型感光性樹脂組成物、樹脂硬化膜、隔壁および光学素子 - Google Patents
ネガ型感光性樹脂組成物、樹脂硬化膜、隔壁および光学素子 Download PDFInfo
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- WO2016010077A1 WO2016010077A1 PCT/JP2015/070289 JP2015070289W WO2016010077A1 WO 2016010077 A1 WO2016010077 A1 WO 2016010077A1 JP 2015070289 W JP2015070289 W JP 2015070289W WO 2016010077 A1 WO2016010077 A1 WO 2016010077A1
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- resin composition
- 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
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0382—Macromolecular compounds which are rendered insoluble or differentially wettable the macromolecular compound being present in a chemically amplified negative 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
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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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional [2D] radiating surfaces
- H05B33/22—Light sources with substantially two-dimensional [2D] radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F71/00—Manufacture or treatment of devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
- H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
Definitions
- the present invention is, for example, a negative photosensitive resin composition, a cured resin film, a partition wall and an optical element used in the production of an optical element such as an organic EL element, a quantum dot display, a TFT array, and a thin film solar cell.
- the present invention relates to an organic EL element, a quantum dot display, a TFT array, a thin film solar cell, and the like.
- the partition wall it is possible to form a fine and high-precision pattern by the partition wall by reducing the residue in the opening while maintaining good production efficiency and the top surface of the partition wall having good ink repellency. Furthermore, it is also applicable to flexible applications using plastic substrates, for example, negative photosensitive resin compositions used in the production of optical elements such as organic EL elements, quantum dot displays, TFT arrays, thin film solar cells, etc. Can provide things.
- the cured resin film of the present invention has good ink repellency on the upper surface, and the partition wall has good ink repellency on the upper surface, and can form a fine and highly accurate pattern.
- TFT arrays, thin film solar cells, and the like, and in particular, can be suitably used for optical elements including flexible applications using plastic substrates.
- the group represented by the formula (x) may be simply referred to as a group (x).
- the compound represented by the formula (y) may be simply referred to as the compound (y).
- the expressions (x) and (y) indicate arbitrary expressions.
- the “side chain” is a group other than a hydrogen atom or a halogen atom bonded to a carbon atom constituting the main chain in a polymer in which a repeating unit composed of carbon atoms constitutes the main chain.
- total solid content of the photosensitive resin composition refers to a component that forms a cured film described later among the components contained in the photosensitive resin composition, and the photosensitive resin composition is heated at 140 ° C. for 24 hours. Obtained from the residue from which the solvent has been removed. The total solid content can also be calculated from the charged amount.
- “Ink” is a general term for liquids having optical and / or electrical functions after drying, curing, and the like.
- an optical element such as an organic EL element, a quantum dot display, a TFT array, a thin film solar cell, and a color filter
- dots as various constituent elements are pattern-printed by ink jet (IJ) method using the ink for forming the dots.
- IJ ink jet
- “Ink” includes ink used in such applications.
- “Ink repellency” is a property of repelling the above ink and has both water repellency and oil repellency.
- the ink repellency can be evaluated by, for example, a contact angle when ink is dropped.
- “Ink affinity” is a property opposite to ink repellency, and can be evaluated by the contact angle when ink is dropped as in the case of ink repellency.
- the ink affinity can be evaluated by evaluating the degree of ink wetting and spreading (ink wetting and spreading property) when ink is dropped on a predetermined standard.
- the negative photosensitive resin composition of the present invention comprises a photocurable alkali-soluble resin or alkali-soluble monomer (A), a photoradical polymerization initiator (B), a photoacid generator (C), A negative photosensitive resin composition comprising an acid curing agent (D) and an ink repellent agent (E) having a fluorine atom.
- the acid curing agent (D) refers to a curing agent that reacts with an acidic group such as a carboxylic acid or a phenolic hydroxyl group in the presence of an acid.
- the alkali-soluble resin or alkali-soluble monomer (A) is polymerized and cured by radicals generated from the photoradical polymerization initiator (B) in the exposed area. A cured film is formed.
- the alkali-soluble resin or the alkali-soluble monomer (A) does not contain a fluorine atom.
- the ink repellent agent (E) has a property of shifting to the upper surface in the process of forming a cured film by having fluorine atoms (upper surface transition property), and the ink repellent agent (E) transferred to the upper surface is fixed on the upper surface of the cured film. To do.
- the negative photosensitive resin composition of the present invention may further comprise a compound (F) having two or more unsaturated double bonds in the molecule and having neither an acidic group nor a fluorine atom, if necessary.
- crosslinking agent (F) thiol compound (G) having 3 or more mercapto groups in one molecule
- thiol compound (G) thiol compound having 3 or more mercapto groups in one molecule
- thiol compound (G) phosphoric acid compound (H)
- Polymerization inhibitor (I) Polymerization inhibitor
- solvent (J) colorant (K)
- alkali-soluble resin or alkali-soluble monomer (A))
- the alkali-soluble resin will be described with a symbol (AP) and the alkali-soluble monomer with a symbol (AM). In the following description, these may be collectively referred to as “alkali-soluble resin (A)”.
- the alkali-soluble resin (AP) a photosensitive resin having an acidic group and an ethylenic double bond in one molecule is preferable.
- the alkali-soluble resin (AP) has an ethylenic double bond in the molecule, and is thus polymerized by the radical generated by the photo radical polymerization initiator (B). Since the alkali-soluble resin (AP) has an acidic group in the molecule, it reacts with the acid curing agent (D) in the presence of the acid generated by the photoacid generator (C). Moreover, it is alkali-soluble by having an acidic group.
- Examples of the acidic group include a carboxy group, a phenolic hydroxyl group, a sulfo group, and a phosphoric acid group. These may be used alone or in combination of two or more.
- Examples of the ethylenic double bond include double bonds having an addition polymerization property such as a (meth) acryloyl group, an allyl group, a vinyl group, a vinyloxy group, and a vinyloxyalkyl group. These may be used alone or in combination of two or more.
- some or all of the hydrogen atoms possessed by the ethylenic double bond may be substituted with an alkyl group such as a methyl group.
- alkali-soluble resin (AP) having an ethylenic double bond examples include a resin (A-1) having a side chain having an acidic group and a side chain having an ethylenic double bond, and an epoxy group having an acidic group and ethylene. And a resin (A-2) into which an ionic double bond is introduced. These may be used alone or in combination of two or more.
- A-2 into which an ionic double bond is introduced.
- alkali-soluble resin (AP) peeling of the cured film during development can be suppressed, and a high-resolution dot pattern can be obtained, and the linearity of the pattern when the dots are linear is good.
- the resin (A-2) it is preferable to use the resin (A-2).
- the linearity of a pattern is favorable means that the edge of the partition obtained does not have a chip etc. and is linear.
- Examples of the resin (A-2) include bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, trisphenolmethane type epoxy resin, epoxy resin having naphthalene skeleton, and biphenyl skeleton.
- a resin in which an acidic group and an ethylenic double bond are introduced into an epoxy resin such as an epoxy resin or a fluorenyl-substituted bisphenol A type epoxy resin is particularly preferable.
- the number of ethylenic double bonds that the alkali-soluble resin (AP) has in one molecule is preferably 3 or more on average, and particularly preferably 6 or more.
- the number of ethylenic double bonds is at least the lower limit of the above range, the alkali solubility between the exposed and unexposed portions is likely to be different, and a fine pattern can be formed with a smaller exposure amount.
- the mass average molecular weight (Mw) of the alkali-soluble resin (AP) is preferably 1.5 ⁇ 10 3 to 30 ⁇ 10 3 , particularly preferably 2 ⁇ 10 3 to 15 ⁇ 10 3 .
- the number average molecular weight (Mn) is preferably 500 to 20 ⁇ 10 3 , and particularly preferably 1.0 ⁇ 10 3 to 10 ⁇ 10 3 .
- the acid value of the alkali-soluble resin (AP) is preferably 10 to 300 mgKOH / g, particularly preferably 30 to 150 mgKOH / g. When the acid value is within the above range, the developability of the negative photosensitive composition is improved.
- alkali-soluble monomer for example, a monomer (A-3) having an acidic group and an ethylenic double bond is preferably used.
- the acidic group and the ethylenic double bond are the same as those of the alkali-soluble resin (AP).
- the acid value of the alkali-soluble monomer (AM) is also preferably in the same range as the alkali-soluble resin (AP).
- Examples of the monomer (A-3) include 2,2,2-triacryloyloxymethylethylphthalic acid.
- the alkali-soluble resin or alkali-soluble monomer (A) contained in the negative photosensitive resin composition may be used alone or in combination of two or more.
- the content of the alkali-soluble resin or alkali-soluble monomer (A) in the total solid content in the negative photosensitive resin composition is preferably 5 to 80% by mass, particularly preferably 10 to 60% by mass. When the content ratio is in the above range, the photo-curing property and developability of the negative photosensitive resin composition are good.
- the radical photopolymerization initiator (B) in the present invention is not particularly limited as long as it is a compound having a function as a radical photopolymerization initiator that generates radicals by actinic rays.
- the radical photopolymerization initiator (B) is also simply referred to as “photopolymerization initiator (B)”.
- Examples of the photopolymerization initiator (B) include those described in WO2014 / 046209, for example, paragraphs [0130] and [0131], and WO2014 / 0669478, for example, in paragraphs [0089] and [0090].
- photopolymerization initiators (B) benzophenones, aminobenzoic acids and aliphatic amines are preferably used together with other radical initiators because they may exhibit a sensitizing effect.
- a photoinitiator (B) may be used individually by 1 type, or may use 2 or more types together.
- the content of the photopolymerization initiator (B) in the total solid content in the negative photosensitive resin composition is preferably 0.1 to 50% by mass, more preferably 0.5 to 30% by mass, and 1 to 15% by mass. % Is particularly preferred. When the content ratio is in the above range, the photo-curing property and developability of the negative photosensitive resin composition are good.
- the photoacid generator (C) is not particularly limited as long as it is a compound that decomposes to generate an acid upon irradiation with an actinic ray. Generally, any compound can be selected and used from compounds used as a photoacid generator in a photosensitive resin composition using a cationic polymerization type alkali-soluble resin. Hereinafter, the photoacid generator (C) is also simply referred to as “acid generator (C)”.
- the acid generated from the acid generator (C) is a bond between the alkali-soluble resin (A) and the acid curing agent (D) described below. Involved.
- the acid generator (C) decomposes upon irradiation with actinic rays to generate an acid.
- the actinic rays include high energy rays such as ultraviolet light, X-rays, and electron beams.
- i line (365 nm), h line (405 nm), and g line (436 nm) are used preferably for exposure.
- the acid generator (C) it is preferable to select an acid generator (C) having a large absorbance at the wavelength of light used for exposure.
- Those having absorption at 350 to 450 nm are preferred, and those having absorption in light including at least one of i-line (365 nm), h-line (405 nm) and g-line (436 nm) have high curability. preferable.
- the acid generator (C) include onium salt acid generators and nonionic acid generators.
- the onium salt acid generator include onium salts and iodonium salt compounds of a compound having a mono to triphenylsulfonium skeleton represented by the following formula (C0).
- R a1 and R a2 each represents an optionally substituted alkyl group having 1 to 20 carbon atoms or a phenyl group, and R a3 represents a monovalent organic group.
- w is an integer of 0 to 5.
- a compound in which R a1 and R a2 are both phenyl groups (which may be substituted) is preferable.
- an onium salt of a compound having a triphenylsulfonium skeleton represented by the following formula (C1) or (C2) is preferable.
- a compound in which the hydrogen atom of the phenyl group of the triphenylsulfonium skeleton is substituted in the compound (C1) and the compound (C2) can also be used as the acid generator (C).
- Xa - and Xb - represents an anion, specifically, X in the above formula (C0) - same anion are exemplified.
- Xa - and Xb - as the anion of the anion and sulfonic acid salt type of phosphorus-based is preferred.
- the cation moiety absorbs the irradiated light, and the anion moiety becomes a source of acid generation.
- Examples of the compound (C0) include an onium salt represented by the following formula (C0-1) as an onium salt of a compound having a monophenylsulfonium skeleton. Further, in the compounds (C1) and (C2) which are onium salts of a compound having a triphenylsulfonium skeleton, for example, as a compound used for performing exposure at i-line (365 nm), the following formula (C1-1) in triphenylsulfonium nonafluorobutanesulfonate represented, triarylsulfonium, PF 6 salts and triarylsulfonium, special phosphorus-based salts represented respectively by the following formula (C2-1) and the following formula (C2-2) Can be mentioned. These compounds are preferable in that they have a large absorbance at a wavelength of 365 nm and are easily available.
- iodonium salt compound examples include diaryl iodonium salts and triarylsulfonium salts.
- the triarylsulfonium salt is composed of the cation moiety and the anion moiety, and is composed of a combination of one specific example of the cation moiety and one specific example of the anion moiety.
- triphenylsulfonium trifluoromethanesulfonate is an example.
- Such a compound include a naphthalimide skeleton and a nitrobenzene represented by the following formula (C3), the following formula (C4), the following formula (C5), the following formula (C6), and the following formula (C7), respectively.
- a skeleton (however, when there is one nitro group, the position is the 2nd or 4th position; when there are two nitro groups, the position is the 2nd or 5th position), a diazomethane skeleton, a phenylacetophenone skeleton, Examples thereof include compounds having a thiochitosan skeleton and a structure in which alkanesulfonic acid, arylsulfonic acid or the like is bonded.
- R b1 to R b5 , R b7 , R b9, and R b11 in formulas (C3) to (C7), (C9), (C10), and (C11) are each independently partially or completely substituted with a fluorine atom. It may be a linear, branched or cyclic (including those having a partial cyclic structure) alkyl group having 1 to 12 carbon atoms or an aryl group having 6 to 18 carbon atoms.
- R b6 , R b8, and R b10 in formulas (C8), (C9), and (C10) each independently may have a substituent or an unsaturated bond, and may contain a heterocyclic ring. Is an organic group.
- Specific examples of the compound having a triazine skeleton and a chlorine atom represented by the above formula (C8) include 2-methyl-4,6-bis (trichloromethyl) -1,3,5-triazine, the following formula (C8-1) 2- (4-methoxyphenyl) -4,6-bis (trichloromethyl) -1,3,5-triazine, 2- (2-furyl) ethenyl-bis (trichloromethyl) -1,3 5-triazine, 2- (5-methyl-2-furyl) ethenyl-4,6-bis (trichloromethyl) -1,3,5-triazine represented by the following formula (C8-2), 3) 2- (4-methoxyphenyl) ethenyl-4,6-bis (trichloromethyl) -1,3,5-triazine, 2- (3,4-dimethoxyphenyl) ethenyl-4,6-bis shown in 3) (Trichlorome Le)
- R 11 to R 32 are each independently a hydrogen atom, a hydroxymethyl group or an alkoxymethyl group. At least one of R 11 to R 16 , at least one of R 17 to R 20 , at least one of R 21 to R 24 , at least one of R 27 to R 30 , R 31 and R 32 At least one of them is an alkoxymethyl group.
- R 33 to R 36 are each independently a hydrogen atom, a hydroxyl group, an alkyl group or an alkoxy group, and Xc is a single bond, a methylene group or an oxygen atom.
- the ink repellent agent (E2) is a compound having a main chain of a hydrocarbon chain and a side chain having a fluorine atom.
- the mass average molecular weight (Mw) of the ink repellent agent (E2) is preferably from 100 to 1,000,000, particularly preferably from 5,000 to 100,000. When the mass average molecular weight (Mw) is not less than the lower limit, the ink repellent agent (E2) tends to move to the upper surface when a cured film is formed using the negative photosensitive resin composition. The opening residue is less than the upper limit, which is preferable.
- ink repellent agent (E2) examples include those described in, for example, [0079] to [0102] of WO2014 / 046209 and, for example, [0144] to [0171] of WO2014 / 0669478.
- the content of the crosslinking agent (F) in the total solid content in the negative photosensitive resin composition is preferably 10 to 60% by mass, particularly preferably 20 to 55% by mass.
- thiol compound (G) examples include tris (2-mercaptopropanoyloxyethyl) isocyanurate, pentaerythritol tetrakis (3-mercaptobutyrate), trimethylolpropane tristhioglycolate, pentaerythritol tristhioglycol.
- the negative photosensitive resin composition of the present invention can optionally contain a phosphoric acid compound (H) in order to improve the adhesion of the obtained cured film to a substrate, a transparent electrode material such as ITO, and the like.
- Such a phosphoric acid compound (H) is not particularly limited as long as it can improve the adhesion of a cured film to a substrate, a transparent electrode material, etc., but the ethylenically unsaturated double molecule in the molecule.
- a phosphoric acid compound having a bond is preferable.
- Examples of the phosphoric acid (meth) acrylate compound used in the present invention include mono (2- (meth) acryloyloxyethyl) acid phosphate, di (2- (meth) acryloyloxyethyl) acid phosphate, and di (2-acryloyloxyethyl). Examples include acid phosphate, tris ((meth) acryloyloxyethyl) acid phosphate, mono (2-methacryloyloxyethyl) caproate acid phosphate, and the like.
- the content is preferably 0.01 to 10% by mass with respect to the total solid content in the negative photosensitive resin composition, 0.1 to 5% by mass is particularly preferable.
- the content ratio is in the above range, the adhesion between the obtained cured film and the substrate is good.
- the content of the polymerization inhibitor (I) in the total solid content in the negative photosensitive resin composition is preferably 0.001 to 20% by mass, more preferably 0.005 to 10% by mass, and 0.01 to 5% by mass. % Is particularly preferred. When the content ratio is in the above range, the development residue of the negative photosensitive resin composition is reduced, and the pattern linearity is good.
- solvent (J) When the negative photosensitive resin composition of the present invention contains a solvent (J), the viscosity is reduced, and the negative photosensitive resin composition can be easily applied to the substrate surface. As a result, a coating film of a negative photosensitive resin composition having a uniform film thickness can be formed.
- a known solvent is used as the solvent (J).
- a solvent (J) may be used individually by 1 type, or may use 2 or more types together.
- Examples of the solvent (J) include alkylene glycol alkyl ethers, alkylene glycol alkyl ether acetates, alcohols, and solvent naphtha. Among these, at least one solvent selected from the group consisting of alkylene glycol alkyl ethers, alkylene glycol alkyl ether acetates, and alcohols is preferable.
- the negative photosensitive resin composition of the present invention contains a colorant (K) when imparting light-shielding properties to a cured film, particularly a partition wall, depending on the application.
- a colorant (K) in the present invention include carbon black, aniline black, anthraquinone black pigment, and perylene black pigment. I. Pigment black 1, 6, 7, 12, 20, 31 etc. are mentioned. Mixtures of organic pigments such as red pigments, blue pigments and green pigments and / or inorganic pigments can also be used.
- the negative photosensitive resin composition of the present invention can be obtained by mixing predetermined amounts of the above components.
- the negative photosensitive resin composition of this invention can be used for manufacture of optical elements, such as an organic EL element, a quantum dot display, a TFT array, a thin film solar cell, a color filter, for example. Specifically, the effect can be exhibited particularly when used for forming a cured film or a partition used for an optical element such as an organic EL element, a quantum dot display, a TFT array, and a thin film solar cell.
- the negative photosensitive resin composition of the present invention it is possible to produce a cured film having good ink repellency on the upper surface, in particular, a partition wall.
- the cured resin film of the embodiment of the present invention is formed using the above-described negative photosensitive resin composition of the present invention.
- the cured resin film according to the embodiment of the present invention is, for example, coated with the negative photosensitive resin composition of the present invention on the surface of a substrate such as a substrate, dried as necessary to remove the solvent, and then exposed. Is obtained by curing.
- the cured resin film according to the embodiment of the present invention is particularly effective when used for optical elements, particularly organic EL elements, quantum dot displays, TFT arrays, and thin film solar cells.
- the partition wall of the present invention is a partition wall made of the above-described cured film of the present invention formed so as to partition the substrate surface into a plurality of sections for dot formation.
- the partition wall is obtained by masking a portion to be a dot formation partition before exposure, developing after exposure. By development, an unexposed portion is removed by masking, and an opening corresponding to a dot forming section is formed together with a partition.
- the partition wall according to the embodiment of the present invention exhibits a particularly remarkable effect when used in an optical element, particularly an organic EL element, a quantum dot display, a TFT array, or a thin film solar cell.
- the partition wall of the embodiment of the present invention does not necessarily require high-temperature treatment in the production process, and thus can be applied to flexible applications using a plastic substrate such as polyethylene terephthalate (PET) or polycarbonate. is there.
- PET polyethylene terephthalate
- polycarbonate polycarbonate
- a negative photosensitive resin composition is applied to one entire main surface of the substrate 1 to form a coating film 21.
- the ink repellent agent (E) is totally dissolved and uniformly dispersed in the coating film 21.
- the ink repellent agent (E) is schematically shown, and does not actually exist in such a particle shape.
- the coating film 21 is dried to form a dry film 22.
- the drying method include heat drying, reduced pressure drying, and reduced pressure heat drying.
- the heating temperature is preferably 50 to 120 ° C.
- the ink repellent agent (E) moves to the upper layer of the dry film.
- the upper surface transfer of an ink repellent agent (E) is similarly achieved within a coating film.
- the exposure method includes full-surface batch exposure, scan exposure, and the like. You may expose in multiple times with respect to the same location. At this time, the multiple exposure conditions may or may not be the same.
- the acid generator (C) in the exposed portion, the acid generator (C) generates an acid by exposure in parallel with radical polymerization of the alkali-soluble resin (A) during exposure.
- the acid curing agent (D) reacts with an acidic group such as a carboxylic acid of the alkali-soluble resin (A).
- the cured film in particular, the curing property of the alkali-soluble resin (A) on the upper surface of the cured film and the fixing property of the ink repellent agent (E) are improved.
- a membrane is obtained.
- a cured film having a curability equivalent to that of a conventional cured film, in particular, a curability on the upper surface can be obtained even with a low exposure amount.
- FIG. 1D shows a state after the non-exposed portion 23B is removed by development.
- the non-exposed portion 23B is dissolved and removed by an alkali developer in a state where the ink repellent agent (E) has moved to the upper layer portion and the ink repellent agent (E) is hardly present in the lower layer. Therefore, the ink repellent agent (E) hardly remains in the opening 5.
- the uppermost layer including the upper surface is the ink repellent layer 4A.
- the ink repellent agent (E) does not have a side chain having an ethylenic double bond
- the ink repellent agent (E) is present in a high concentration as it is in the uppermost layer and becomes an ink repellent layer.
- the alkali-soluble resin (A) present around the ink repellent agent (E) is strongly photocured with the acid curing agent (D), particularly in the presence of an acid generated by the acid generator (C).
- the ink repellent agent (E) is fixed to the ink repellent layer.
- the negative photosensitive resin composition optionally contains the thiol compound (G)
- the reaction by the ethylenic double bond is promoted, and the ink repellent layer is cured more firmly.
- the ink-repellent layer 4A has mainly an alkali-soluble resin (A), an acid curing agent (D), and an optionally contained thiol compound (G), and other photocuring components.
- A alkali-soluble resin
- D acid curing agent
- G thiol compound
- other photocuring components are photocured by radical polymerization by radicals generated by the photopolymerization initiator (B) and cationic polymerization in the presence of acid generated by the acid generator (C), and the layer hardly contains the ink repellent agent (E). 4B is formed.
- the ink repellent agent (E) is sufficiently fixed to the partition including the ink repellent layer 4A and the lower layer 4B, and therefore hardly migrates to the opening during development.
- the surface and the inside of the cured film are sufficiently cured by combining the radical polymerization reaction by light and the curing reaction in the presence of acid by light. . Therefore, the hardened portion which is the exposed portion has resistance to erosion and peeling by the alkaline developer during development. Therefore, the exposed portion is not easily affected by long-time development, which is advantageous for removing the residue at the opening.
- the partition 4 may be further heated after development.
- the heating temperature is preferably 80 to 250 ° C.
- the partition 4 is hardened by heating.
- the ink repellent agent (E) is more firmly fixed in the ink repellent layer 4A.
- the composition of the present invention can exhibit high liquid repellency even when cured at low temperature, and can also have high liquid repellency even after being immersed in a chemical such as an acid or an organic solvent.
- the heating temperature needs to be set low.
- the heating temperature is preferably set to 150 ° C. or lower, particularly preferably 120 ° C. or lower.
- the composition of the present invention maintains liquid repellency and has excellent chemical resistance even when heated at a low temperature as described above.
- the cured resin film and the partition 4 of the present invention thus obtained have good ink repellency on the upper surface even when exposure is performed at a low exposure amount.
- the ink repellent (E) hardly exists in the opening 5 after development, and the uniform coating property of the ink in the opening 5 can be sufficiently ensured.
- the substrate 1 with the partition walls 4 may be subjected to ultraviolet / ozone treatment.
- the width of the partition formed from the negative photosensitive resin composition of the present invention is preferably 100 ⁇ m or less, and particularly preferably 20 ⁇ m or less.
- the distance between adjacent partition walls (pattern width) is preferably 300 ⁇ m or less, and particularly preferably 100 ⁇ m or less.
- the height of the partition wall is preferably 0.05 to 50 ⁇ m, particularly preferably 0.2 to 10 ⁇ m.
- the partition formed from the negative photosensitive resin composition of the present invention has few irregularities in the edge portion when formed to the above width, and is excellent in linearity.
- the high linearity in the partition walls is particularly remarkable when a resin (A-2) in which an acidic group and an ethylenic double bond are introduced into an epoxy resin is used as the alkali-soluble resin.
- A-2 a resin in which an acidic group and an ethylenic double bond are introduced into an epoxy resin
- an epoxy resin is used as the alkali-soluble resin.
- the partition of the present invention can be used as a partition having the opening as an ink injection region when pattern printing is performed by the IJ method.
- pattern printing is performed by the IJ method
- the partition wall of the present invention is formed and used so that the opening thereof coincides with a desired ink injection region, the partition top surface has good ink repellency. It is possible to suppress ink from being injected into an undesired opening, that is, an ink injection region beyond the partition wall.
- the opening surrounded by the partition wall has good ink wetting and spreading properties, it is possible to print the ink uniformly without causing white spots or the like in a desired region.
- the barrier rib of the present invention is an optical element having a barrier rib positioned between a plurality of adjacent dots on a substrate surface on which dots are formed by the IJ method, particularly an organic EL element, a quantum dot display, a TFT array, and a thin film solar. It is useful as a battery partition.
- optical element of the present invention in particular, an organic EL element, a quantum dot display, a TFT array, or a thin film solar cell is an optical element having a plurality of dots and a partition wall of the present invention located between adjacent dots on the substrate surface. is there.
- the dots are preferably formed by the IJ method.
- An organic EL element has a structure in which a light emitting layer of an organic thin film is sandwiched between an anode and a cathode. It can be used for partitioning applications.
- the organic TFT array element is a semiconductor layer including a plurality of dots arranged in a matrix in plan view, each pixel having a pixel electrode and a TFT as a switching element for driving it, and including a TFT channel layer.
- the organic TFT array element is provided as a TFT array substrate in, for example, an organic EL element or a liquid crystal element.
- ink 10 is dropped from the inkjet head 9 into the opening 5 surrounded by the partition wall 4 and a predetermined amount of ink 10 is injected into the opening 5.
- known inks for organic EL elements are appropriately selected and used in accordance with the function of dots.
- the optical element of the embodiment of the present invention uses the partition wall of the present invention, so that an ink is formed in an opening partitioned by the partition wall in the manufacturing process.
- an optical element having dots formed with high accuracy in particular, an organic EL element, a quantum dot display, a TFT array, or a thin film solar cell.
- an organic EL element can be manufactured as follows, for example, it is not limited to this.
- a light-transmitting electrode such as tin-doped indium oxide (ITO) is formed on a plastic light-transmitting substrate such as glass or PET by sputtering or the like.
- the translucent electrode is patterned as necessary.
- partition walls are formed in a lattice shape in plan view along the outline of each dot by photolithography including coating, exposure and development.
- the materials of the hole injection layer, the hole transport layer, the light emitting layer, the hole blocking layer, and the electron injection layer are applied and dried in the dots by the IJ method, and these layers are sequentially stacked.
- the kind and number of organic layers formed in the dots are appropriately designed.
- a reflective electrode such as aluminum is formed by vapor deposition or the like.
- the quantum dot display can be manufactured, for example, as follows, but is not limited thereto.
- a light-transmitting electrode such as tin-doped indium oxide (ITO) is formed on a plastic light-transmitting substrate such as glass or PET by sputtering or the like.
- the translucent electrode is patterned as necessary.
- partition walls are formed in a lattice shape in plan view along the outline of each dot by photolithography including coating, exposure and development.
- the materials of the hole injection layer, the hole transport layer, the quantum dot layer, the hole blocking layer, and the electron injection layer are respectively applied and dried in the dots by the IJ method, and these layers are sequentially stacked. .
- the kind and number of organic layers formed in the dots are appropriately designed.
- a reflective electrode such as aluminum or a translucent electrode such as ITO is formed by vapor deposition or the like.
- a nanoparticle solution that converts blue light into green light by the IJ method, a nanoparticle solution that converts blue light into red light, and a blue color ink as necessary are coated in the dots and dried. Is made.
- a liquid crystal display with excellent color reproducibility can be obtained by using a light source that emits blue as a backlight and using the module as a color filter alternative.
- the TFT array can be manufactured, for example, as follows, but is not limited thereto.
- a gate electrode such as aluminum or an alloy thereof is formed on a light-transmitting substrate made of plastic such as glass or PET by a sputtering method or the like. This gate electrode is patterned as necessary.
- a gate insulating film such as silicon nitride is formed by a plasma CVD method or the like.
- a source electrode and a drain electrode may be formed over the gate insulating film.
- the source electrode and the drain electrode can be formed by forming a metal thin film such as aluminum, gold, silver, copper, or an alloy thereof by, for example, vacuum deposition or sputtering.
- a resist is coated, exposed and developed to leave the resist in a portion where the electrode is to be formed, and then exposed with phosphoric acid or aqua regia. There is a method of removing the metal and finally removing the resist.
- the source electrode and the drain electrode may be formed by a method such as ink jet using a metal nanocolloid such as silver or copper.
- partition walls are formed in a lattice pattern in plan view along the outline of each dot by photolithography including coating, exposure and development.
- a semiconductor solution is applied in the dots by the IJ method, and the solution is dried to form a semiconductor layer.
- an organic semiconductor solution or an inorganic coating type oxide semiconductor solution can also be used.
- the source electrode and the drain electrode may be formed by using a method such as inkjet after forming the semiconductor layer.
- a transparent electrode such as ITO is formed by sputtering or the like, and a protective film such as silicon nitride is formed.
- Examples 1 to 10 are examples, and examples 11 to 13 are comparative examples.
- the column is maintained at 37 ° C., tetrahydrofuran is used as the eluent, the flow rate is 0.2 mL / min, and a 0.5% tetrahydrofuran solution of the measurement sample is used. 40 ⁇ L was injected.
- fluorine atom content The content of fluorine atoms was calculated by 19 F NMR measurement using 1,4-ditrifluoromethylbenzene as a standard substance.
- Alkali-soluble resin (A) Alkali-soluble resin (A1) composition: A cresol novolac epoxy resin is reacted with acrylic acid and then 1,2,3,6-tetrahydrophthalic anhydride, and a resin into which an acryloyl group and a carboxy group are introduced is purified with hexane Composition (alkali-soluble resin (A1), acid value 60 mgKOH / g) (solid content 70% by mass, PGMEA 30% by mass)
- Alkali-soluble resin (A2) composition a composition (alkali-soluble resin (A2) having an acid value of 100 mgKOH / g) in which a carboxyl group and an ethylenic double bond are introduced into a bisphenol A type epoxy resin (solid content: 70% by mass) , PGMEA 30% by mass).
- Alkali-soluble resin (A3) composition a resin in which an ethylenic double bond and an acidic group are introduced into an epoxy resin having a biphenyl skeleton represented by the following formula (A-2a) (alkali-soluble resin (A3), acid value) 70 mg KOH / g) (solid content 70% by mass, PGMEA 30% by mass).
- v is an integer of 1 to 50, preferably an integer of 2 to 10.
- the hydrogen atoms of the benzene ring are each independently an alkyl group having 1 to 12 carbon atoms or a halogen atom. Or a part of hydrogen atoms may be substituted with a phenyl group which may be substituted with a substituent.
- Alkali-soluble resin (AR-1) A reaction tank having an internal volume of 1 L equipped with a stirrer was charged with acetone (555 g), AA (acrylic acid) (36.0 g), 2-HEMA (108.0 g), IBMA (72.0 g), chain transfer agent DSH (9.7 g) and polymerization initiator V-70 (5.1 g) were charged and polymerized at 40 ° C. for 18 hours with stirring under a nitrogen atmosphere to obtain an alkali-soluble resin ( A solution of AR-1) was obtained.
- alkali-soluble resin (AR-1) Water is added to the acetone solution of the obtained alkali-soluble resin (AR-1) to effect reprecipitation purification, then reprecipitation purification with petroleum ether, vacuum drying, and alkali-soluble resin (AR-1) 235 g was obtained.
- the number average molecular weight (Mn) of the alkali-soluble resin (AR-1) was 5,000, and the acid value of the alkali-soluble resin (AR-1) was 119 mgKOH / g.
- IR907 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one (trade name IRGACURE907, manufactured by BASF).
- OXE02 Ethanone 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl] -1- (O-acetyloxime) (manufactured by BASF, trade name: OXE02).
- EAB 4,4′-bis (diethylamino) benzophenone (manufactured by Tokyo Chemical Industry Co., Ltd.).
- PAG-A 2- (5-methyl-2-furyl) ethenyl-4,6-bis (trichloromethyl) -1,3,5-triazine (a compound represented by the above formula (C8-2)).
- PAG-B 2- [2- (n-propylsulfonyloxyimino) thiophene-3 (2H) -ylidene] -2- (2-methylphenyl) acetonitrile (among the compounds represented by the above formula (C11), R a compound wherein b11 is an n-propyl group).
- WPAG199 bis (p-toluenesulfonyl) diazomethane.
- SI-150L sulfonium aromatic represented by the formula (C0-1) SbF 6 - salt (Sanshin Chemical Industry Co., Ltd., trade name: San-Aid SI-150L).
- Epoxy A an epoxy compound containing a dicyclopentane ring represented by the above formula (De1).
- Epoxy B a naphthalene ring-containing epoxy compound represented by the above formula (De2).
- Melamine A 2,4,6-tris [bis (methoxymethyl) amino] -1,3,5-triazine (compound represented by the above formula (D1-1)).
- Melamine B 1,3,4,6-tetrakis (methoxymethyl) glycoluril (compound represented by the above formula (D3-1)).
- V-65 (2,2′-azobis (2,4-dimethylvaleronitrile))
- V-70 2,2′-azobis (4-methoxy-2,4-dimethylvaleronitrile)
- DSH n-dodecyl mercaptan
- BEI 1,1- (bisacryloyloxymethyl) ethyl isocyanate)
- AOI 2-acryloyloxyethyl isocyanate
- DBTDL Dibutyltin dilaurate TBQ: t-butyl-p-benzoquinone
- MEK 2-butanone
- the agent was inactivated to obtain a solution (solid content concentration: 30% by mass) of a copolymer (ink repellent agent (E-1)).
- This solution was used for the production of a negative photosensitive resin composition described later.
- the negative photosensitive resin composition in the state of the solution. Used in the manufacture of the product.
- the ink repellent agent (E-1) has a number average molecular weight of 14,200, a mass average molecular weight of 21,500, a fluorine atom content of 31.4% by mass, and an acid value of 32.6 (mgKOH / g )Met.
- the ink repellent agent (E-2) has a number average molecular weight of 7,540, a mass average molecular weight of 16,200, a fluorine atom content of 14.8% by mass, and an acid value of 35.1 (mgKOH / g )Met.
- the ink repellent agent (E-3) has a number average molecular weight of 14,850, a mass average molecular weight of 22,700, a fluorine atom content of 31.4% by mass, and an acid value of 32.6 (mgKOH / g )Met.
- ink repellent (E-4)
- the ink repellent agent (E-4) had a number average molecular weight of 5,700, a mass average molecular weight of 8,800, and a fluorine atom content of 19.0% by mass.
- the ink repellent agent (E-5) has a number average molecular weight of 8,000, a mass average molecular weight of 10,600, a fluorine atom content of 28.0% by mass, and an acid value of 93.3 (mgKOH / g). )Met.
- the ink repellent agent (E-6) had a number average molecular weight of 9,000, a mass average molecular weight of 11,700, a fluorine atom content of 14.7% by mass, and an acid value of 65 mgKOH / g.
- the ink repellent agent (E-7) had a number average molecular weight of 4,500, a mass average molecular weight of 5,590, a fluorine atom content of 12.5% by mass, and an acid value of 33 mgKOH / g.
- Table 1 summarizes the raw material compositions and properties of the ink repellent agents (E-1) to (E-7) obtained or prepared above.
- Table 2 shows the amount of raw material hydrolyzable silane compound used in the production of the obtained ink repellent agents ((E-8) to (E-10)).
- the silane compound means a hydrolyzable silane compound.
- the number average molecular weight (Mn), mass average molecular weight (Mw), and fluorine atom content (% by mass) of the obtained ink repellent agents ((E-8) to (E-10)) were measured. Table 2 shows.
- Example 1 Production of negative photosensitive resin composition and production of cured film and partition wall (pattern film)] (Manufacture of negative photosensitive resin composition)
- the negative photosensitive resin composition 1 was manufactured by stirring for 3 hours.
- the entire surface of the obtained dried film was irradiated with UV light from an ultrahigh pressure mercury lamp having an exposure power (exposure output) in terms of 365 nm of 300 mW / cm 2 .
- exposure power exposure output
- two types of cured films were produced by adjusting the irradiation time so that the exposure amount was 30 mJ / cm 2 or 50 mJ / cm 2 . In all cases, light of 330 nm or less was cut during the exposure.
- the glass substrate after the exposure treatment was immersed in a 2.38% tetramethylammonium hydroxide aqueous solution for 10 seconds, washed away with water, and then dried. Subsequently, this was heated on a hot plate at 230 ° C. for 60 minutes to obtain a cured film having no opening.
- the distance between the dry film and the photomask was 50 ⁇ m.
- the glass substrate after the exposure treatment was developed by immersing in a 2.38% tetramethylammonium hydroxide aqueous solution for 40 seconds, and the non-exposed portion was washed away with water and dried. Next, this was heated on a hot plate at 230 ° C. for 60 minutes to obtain a pattern film 1 as a cured film having an opening corresponding to the masking portion of the photomask.
- the distance between the dry film and the photomask was 50 ⁇ m.
- the glass substrate after the exposure treatment was developed by immersing it in a 2.38% tetramethylammonium hydroxide aqueous solution for 200 seconds, and the non-exposed portion was washed with 1.5 MPa high-pressure water for 10 seconds and dried. Next, this was heated on a hot plate at 230 ° C. for 60 minutes to obtain a pattern film 2 as a cured film having an opening corresponding to the masking portion of the photomask.
- the glass substrate after the exposure treatment was developed by immersing in a 2.38 mass% tetramethylammonium hydroxide aqueous solution for 40 seconds, and the non-exposed portion was washed away with water and dried.
- a pattern film 3 was obtained as a cured film having a pattern corresponding to the opening pattern of the photomask.
- the PGMEA contact angle on the upper surface of the cured film obtained above was measured by the following method to evaluate ink repellency.
- PGMEA droplets were placed on the upper surface of the cured film by the sessile drop method, and each PGMEA droplet was measured.
- the droplet was 2 ⁇ L / droplet, and the measurement was performed at 20 ° C.
- the contact angle was determined from the average value of 3 measurements.
- the PGMEA contact angle on the upper surface of the cured film obtained above was measured by the above method.
- the pattern forming property was evaluated according to the following criteria.
- the line width of the line portion where the line / space was 20 ⁇ m / 50 ⁇ m was measured.
- Example 2 In Example 1, except that the negative photosensitive resin composition was changed to the composition shown in Table 3, Table 4 or Table 5, a negative photosensitive resin composition, a partition, and a cured film were produced in the same manner. Evaluation similar to Example 1 was performed. The evaluation results of each example are shown in Table 3, Table 4, and Table 5 together with the composition of the negative photosensitive resin composition.
- Examples 1 to 10 corresponding to the examples of the negative photosensitive resin composition of the present invention, an alkali-soluble resin or alkali-soluble monomer (A) having an unsaturated double bond, a photopolymerization initiator (B), Since the acid generator (C) and the acid curing agent (D) are contained, high liquid repellency was obtained even when the exposure amount was as low as 30 mJ / cm 2 . Further, even when the exposure amount is 50 mJ / cm 2, the line width is not easily increased, and the pattern formability is good.
- Example 11 and 12 corresponding to the comparative examples since either one of the photopolymerization initiator (B) and the acid generator (C) is not contained, the exposure amount is as low as 30 mJ / cm 2 . In some cases, the liquid repellency was insufficient. For this reason, the upper surface of the cured film has insufficient ink repellency. In Example 13 corresponding to the comparative example, the amount of the photopolymerization initiator (B) was increased, so that the liquid repellency was sufficient. However, since the acid generator (C) was not contained, the exposure amount was 30 mJ / cm 2 . Even in the case of a low exposure amount, the line width tends to be thick, and the pattern formability is insufficient.
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Abstract
Description
[1]光硬化性を有するアルカリ可溶性樹脂またはアルカリ可溶性単量体(A)と、光ラジカル重合開始剤(B)と、光酸発生剤(C)と、酸硬化剤(D)と、フッ素原子を有する撥インク剤(E)とを含有することを特徴とするネガ型感光性樹脂組成物。
[2]分子内に2つ以上の不飽和二重結合を有し、酸性基およびフッ素原子のいずれも有しない化合物(F)をさらに含有することを特徴とする、[1]のネガ型感光性樹脂組成物。
[3]前記酸硬化剤(D)がメラミン系化合物、尿素系化合物およびエポキシ系化合物から選ばれる、少なくとも1種である、[1]または[2]のネガ型感光性樹脂組成物。
[4]有機EL素子、量子ドットディスプレイ、TFTアレイまたは薄膜太陽電池の製造に用いられる[1]~[3]のいずれかのネガ型感光性樹脂組成物。
[5]前記[1]~[4]のいずれかのネガ型感光性樹脂組成物を用いて形成されることを特徴とする樹脂硬化膜。
[6]基板表面をドット形成用の複数の区画に仕切る形に形成された隔壁であって、[5]の樹脂硬化膜からなることを特徴とする隔壁。
[7]基板表面に複数のドットと隣接するドット間に位置する隔壁とを有する光学素子であって、前記隔壁が[6]の隔壁で形成されていることを特徴とする光学素子。
[8]前記光学素子は、有機EL素子、量子ドットディスプレイ、TFTアレイまたは薄膜太陽電池である[7]の光学素子。
[9]前記ドットがインクジェット法で形成されていることを特徴とする[7]または[8]の光学素子。
「(メタ)アクリロイル基」は、「メタクリロイル基」と「アクリロイル基」の総称である。(メタ)アクリロイルオキシ基、(メタ)アクリル酸、(メタ)アクリレート、(メタ)アクリルアミド、および(メタ)アクリル樹脂もこれに準じる。
[ネガ型感光性樹脂組成物]
本発明のネガ型感光性樹脂組成物は、光硬化性を有するアルカリ可溶性樹脂またはアルカリ可溶性単量体(A)と、光ラジカル重合開始剤(B)と、光酸発生剤(C)と、酸硬化剤(D)と、フッ素原子を有する撥インク剤(E)とを含有することを特徴とするネガ型感光性樹脂組成物である。本明細書において、酸硬化剤(D)とは、酸の存在下、カルボン酸やフェノール性水酸基等の酸性基と反応する硬化剤をいう。本発明のネガ型感光性樹脂組成物は、有機EL素子、量子ドットディスプレイ、TFTアレイ、薄膜太陽電池、カラーフィルタ等の光学素子の製造に好適に使用でき、特に、有機EL素子、量子ドットディスプレイ、TFTアレイ、薄膜太陽電池において顕著な効果が期待できる。
アルカリ可溶性樹脂には符号(AP)、アルカリ可溶性単量体には符号(AM)を付して、それぞれ説明する。なお、以下の説明においてこれらを総称して「アルカリ可溶性樹脂(A)」ということもある。
エチレン性二重結合としては、(メタ)アクリロイル基、アリル基、ビニル基、ビニルオキシ基およびビニルオキシアルキル基等の付加重合性を有する二重結合が挙げられる。これらは1種を単独で用いても2種以上を併用してもよい。なお、エチレン性二重結合が有する水素原子の一部または全てが、メチル基等のアルキル基で置換されていてもよい。
このようなアルカリ可溶性樹脂(AP)としては、国際公開第2014/046209号(以下、WO2014/046209という)の例えば、段落[0108]、[0126]、国際公開第2014/069478号(以下、WO2014/069478という)の例えば、段落[0067][0085]に記載されているものが使用できる。
単量体(A-3)としては、2,2,2-トリアクリロイルオキシメチルエチルフタル酸等が挙げられる。
ネガ型感光性樹脂組成物における全固形分中のアルカリ可溶性樹脂またはアルカリ可溶性単量体(A)の含有割合は、5~80質量%が好ましく、10~60質量%が特に好ましい。含有割合が上記範囲であると、ネガ型感光性樹脂組成物の光硬化性および現像性が良好である。
本発明における光ラジカル重合開始剤(B)は、活性光線によりラジカルを発生する光ラジカル重合開始剤としての機能を有する化合物であれば特に制限されない。以下、光ラジカル重合開始剤(B)を単に「光重合開始剤(B)」ともいう。
光酸発生剤(C)は、活性光線を照射することで、分解して酸を発生する化合物であれば、特に制限されない。一般に、カチオン重合型のアルカリ可溶性樹脂を用いた感光性樹脂組成物において光酸発生剤として用いられる化合物の中から、任意の化合物を選択して使用することができる。以下、光酸発生剤(C)を単に「酸発生剤(C)」ともいう。
なお、これらのオニウム塩においては、カチオン部が照射された光を吸収し、アニオン部が酸の発生源となる。
また、トリフェニルスルホニウム骨格を有する化合物のオニウム塩である化合物(C1)および化合物(C2)において、例えば、露光をi線(365nm)で行うのに用いられる化合物として、下式(C1-1)で表されるトリフェニルスルホニウム・ノナフルオロブタンスルホネート、下式(C2-1)および下式(C2-2)でそれぞれ表されるトリアリールスルホニウム・PF6塩およびトリアリールスルホニウム・特殊リン系塩が挙げられる。これらの化合物は、波長365nmにおける吸光度が大きい点や入手がしやすい点で好ましい。
なお、化合物(C3)、(C4)、(C6)、(C7)、(C11)においては、各化合物の骨格を形成するベンゼン環の水素原子が置換された化合物も酸発生剤として機能可能である。
酸硬化剤(D)は酸の存在下、カルボン酸やフェノール性水酸基等の酸性基と反応する化合物であれば特に制限されない。
上記式(D5)で示される尿素系化合物として、例えば、以下の化合物が挙げられる。
本発明における撥インク剤(E)は分子内にフッ素原子を有する。これにより、撥インク剤(E)は、これを含有するネガ型感光性樹脂組成物を用いて硬化膜を形成する過程で上面に移行する性質(上面移行性)および撥インク性を有する。撥インク剤(E)を用いることで、得られる硬化膜の上面を含む上層部は、撥インク剤(E)が密に存在する層(以下、「撥インク層」ということもある。)となり、硬化膜上面に撥インク性が付与される。
撥インク剤(E1)および撥インク剤(E2)は、単独で、または組み合わせて用いられる。本発明のネガ型感光性樹脂組成物においては、耐紫外線/オゾン性の点に優れる点で、特に撥インク剤(E1)を用いることが好ましい。
撥インク剤(E1)は、加水分解性シラン化合物混合物(以下、「混合物(M)」ともいう。)の部分加水分解縮合物である。該混合物(M)は、フルオロアルキレン基および/またはフルオロアルキル基、および、ケイ素原子に加水分解性基が結合した基とを有する加水分解性シラン化合物(以下、「加水分解性シラン化合物(s1)」ともいう。)を必須成分として含み、任意に加水分解性シラン化合物(s1)以外の加水分解性シラン化合物を含む。混合物(M)が任意に含有する加水分解性シラン化合物としては、以下の加水分解性シラン化合物(s2)、(s3)が挙げられる。混合物(M)が任意に含有する加水分解性シラン化合物としては、加水分解性シラン化合物(s2)が特に好ましい。
加水分解性シラン化合物(s3);エチレン性二重結合を有する基とケイ素原子に加水分解性基が結合した基とを有し、フッ素原子を含まない加水分解性シラン化合物。
ここで、n1~n3は構成単位の合計モル量に対する各構成単位のモル分率を示す。n1>0、n2≧0、n3≧0、n1+n2+n3=1である。
各成分のモル比は、各成分の効果のバランスから設計される。
n1は、撥インク剤(E1)におけるフッ素原子の含有率が上記好ましい範囲となる量において、0.02~0.4が好ましい。
n2は、0~0.98が好ましく、0.05~0.6が特に好ましい。
n3は、0~0.8が好ましく、0.2~0.5が特に好ましい。
質量平均分子量(Mw)が下限値以上であると、ネガ型感光性樹脂組成物を用いて硬化膜を形成する際に、撥インク剤(E1)が上面移行しやすい。上限値未満であると、開口部残渣が少なくなり好ましい。
撥インク剤(E1)の質量平均分子量(Mw)は、製造条件により調節できる。
この反応には、通常用いられる塩酸、硫酸、硝酸およびリン酸等の無機酸、あるいは、酢酸、シュウ酸およびマレイン酸等の有機酸を触媒として用いることが好ましい。また、必要に応じて水酸化ナトリウム、水酸化テトラメチルアンモニウム(TMAH)等のアルカリ触媒を用いてもよい。
上記反応には公知の溶媒を用いることができる。
上記反応で得られる撥インク剤(E1)は、溶媒とともに溶液の性状でネガ型感光性樹脂組成物に配合してもよい。
撥インク剤(E2)は、主鎖が炭化水素鎖であり、フッ素原子を有する側鎖を含む化合物である。撥インク剤(E2)の質量平均分子量(Mw)は、100~1,000,000が好ましく、5,000~100,000が特に好ましい。質量平均分子量(Mw)が下限値以上であると、ネガ型感光性樹脂組成物を用いて硬化膜を形成する際に、撥インク剤(E2)が上面移行しやすい。上限値以下であると開口部残渣が少なくなり好ましい。
本発明のネガ型感光性樹脂組成物が任意に含有する架橋剤(F)は、1分子中に2個以上の不飽和二重結合、すなわちエチレン性二重結合を有し、酸性基およびフッ素原子のいずれも有しない化合物である。ネガ型感光性樹脂組成物が架橋剤(F)を含むことにより、露光時におけるネガ型感光性樹脂組成物の硬化性が向上し、低い露光量でも硬化膜を形成することができる。
架橋剤(F)は、1種を単独で用いても2種以上を併用してもよい。
本発明のネガ型感光性樹脂組成物が任意に含有するチオール化合物(G)は、1分子中にメルカプト基を2個以上有する化合物である。本発明のネガ型感光性樹脂組成物がチオール化合物(G)を含有すれば、露光時に光重合開始剤(B)から生成したラジカルによりチオール化合物(G)のラジカルが生成してアルカリ可溶性樹脂(A)のエチレン性二重結合に作用する、いわゆるエン-チオール反応が生起する。このエン-チオール反応は、通常のエチレン性二重結合がラジカル重合するのと異なり、酸素による反応阻害を受けないため、高い連鎖移動性を有し、さらに重合と同時に架橋も行うため、硬化物となる際の収縮率も低く、均一なネットワークが得られやすい等の利点を有する。
チオール化合物(G)は、1種を単独で用いても2種以上を併用してもよい。
本発明のネガ型感光性樹脂組成物は、得られる硬化膜における基材やITO等の透明電極材料等に対する密着性を向上させるために、任意にリン酸化合物(H)を含むことができる。
本発明における重合禁止剤(I)は、重合禁止剤としての機能を有する化合物であれば特に制限されず、アルカリ可溶性樹脂(A)の反応を阻害するラジカルを発生する化合物が好ましい。本発明のネガ型感光性樹脂組成物においては、露光時に照射される光の量を重合禁止剤(I)が調整し、重合を制御することで、該組成物の硬化を穏やかに進行させることが可能となる。これにより、非露光部における硬化の進行が抑制され、開口部の現像残渣の減少に寄与できる。さらに、高解像度のドットのパターンが得られるとともに、パターンの直線性の向上に寄与できる。
本発明のネガ型感光性樹脂組成物は、溶媒(J)を含有することで粘度が低減され、ネガ型感光性樹脂組成物の基材表面への塗布がしやすくなる。その結果、均一な膜厚のネガ型感光性樹脂組成物の塗膜が形成できる。
溶媒(J)としては公知の溶媒が用いられる。溶媒(J)は、1種を単独で用いても2種以上を併用してもよい。
本発明のネガ型感光性樹脂組成物は、用途に応じて、硬化膜、特には隔壁に遮光性を付与する場合に、着色剤(K)を含有する。本発明における着色剤(K)としては、カーボンブラック、アニリンブラック、アントラキノン系黒色顔料およびペリレン系黒色顔料、具体的には、C.I.ピグメントブラック1、6、7、12、20、31等が挙げられる。赤色顔料、青色顔料および緑色顔料等の有機顔料および/または無機顔料の混合物を用いることもできる。
本発明におけるネガ型感光性樹脂組成物はさらに、必要に応じて、熱架橋剤、高分子分散剤、分散助剤、シランカップリング剤、微粒子、硬化促進剤、増粘剤、可塑剤、消泡剤、レベリング剤およびハジキ防止剤等の他の添加剤を1種または2種以上含有してもよい。
本発明の実施形態の樹脂硬化膜は、上記の本発明のネガ型感光性樹脂組成物を用いて形成される。本発明の実施形態の樹脂硬化膜は、例えば、基板等の基材の表面に本発明のネガ型感光性樹脂組成物を塗布し、必要に応じて乾燥して溶媒等を除去した後、露光することで硬化して得られる。本発明の実施形態の樹脂硬化膜は、光学素子、特には、有機EL素子や量子ドットディスプレイ、TFTアレイ、薄膜太陽電池に用いられる場合に特に顕著な効果が発揮される。
この乾燥過程において、撥インク剤(E)は乾燥膜の上層部に移行する。なお、ネガ型感光性樹脂組成物が、溶媒(J)を含有しない場合であっても、塗膜内で撥インク剤(E)の上面移行は同様に達成される。
照射する光としては、波長100~600nmの光が好ましく、300~500nmの光がより好ましく、i線(365nm)、h線(405nm)またはg線(436nm)を含む光が特に好ましい。また、必要に応じて330nm以下の光をカットしてもよい。
単位面積当たりの露光時間は通常1~60秒程度である。
このようにして、撥インク剤(E)は、撥インク層4Aその下部層4Bを含む隔壁に充分に定着しているため、現像時に開口部にマイグレートすることがほとんどない。
本発明の光学素子、特には、有機EL素子、量子ドットディスプレイ、TFTアレイまたは薄膜太陽電池は、基板表面に複数のドットと隣接するドット間に位置する上記本発明の隔壁とを有する光学素子である。本発明の光学素子、特には、有機EL素子、量子ドットディスプレイ、TFTアレイまたは薄膜太陽電池においてドットはIJ法により形成されることが好ましい。
図2Aおよび図2Bは、上記図1Dに示す基板1上に形成された隔壁4を用いて有機EL素子を製造する方法を模式的に示すものである。ここで、基板1上の隔壁4は、開口部5が、製造しようとする有機EL素子のドットのパターンに一致するように形成されたものである。
ガラスやPETなどのプラスチックの透光性基板にスズドープ酸化インジウム(ITO)等の透光性電極をスパッタ法等によって成膜する。この透光性電極は必要に応じてパターニングされる。
次に、本発明のネガ型感光性樹脂組成物を用い、塗布、露光および現像を含むフォトリソグラフィ法により、各ドットの輪郭に沿って、平面視格子状に隔壁を形成する。
次に、ドット内に、IJ法により、正孔注入層、正孔輸送層、発光層、正孔阻止層および電子注入層の材料をそれぞれ塗布および乾燥して、これらの層を順次積層する。ドット内に形成される有機層の種類および数は適宜設計される。
最後に、アルミニウム等の反射電極を蒸着法等によって形成する。
ガラスやPETなどのプラスチックの透光性基板にスズドープ酸化インジウム(ITO)等の透光性電極をスパッタ法等によって成膜する。この透光性電極は必要に応じてパターニングされる。
次に、本発明のネガ型感光性樹脂組成物を用い、塗布、露光および現像を含むフォトリソグラフィ法により、各ドットの輪郭に沿って、平面視格子状に隔壁を形成する。
次に、ドット内に、IJ法により、正孔注入層、正孔輸送層、量子ドット層、正孔阻止層および電子注入層の材料をそれぞれ塗布および乾燥して、これらの層を順次積層する。ドット内に形成される有機層の種類および数は適宜設計される。
最後に、アルミニウム等の反射電極、またはITO等の透光性電極を蒸着法等によって形成する。
ガラスやPETなどのプラスチックの透光性基板に本発明のネガ型感光性樹脂組成物を用い、各ドットの輪郭に沿って、平面視格子状に隔壁を形成する。
ガラスやPETなどのプラスチックの透光性基板にアルミニウムやその合金等のゲート電極をスパッタ法等によって成膜する。このゲート電極は必要に応じてパターニングされる。
次にドット内に半導体溶液をIJ法によって塗布し、溶液を乾燥させることによって半導体層を形成する。この半導体溶液としては有機半導体溶液、無機の塗布型酸化物半導体溶液も用いることができる。ソース電極、ドレイン電極は、この半導体層形成後にインクジェットなどの手法を用いて形成されてもよい。
最後にITO等の透光性電極をスパッタ法等によって成膜し、窒化ケイ素等の保護膜を成膜することで形成する。
[数平均分子量(Mn)、質量平均分子量(Mw)]
ゲルパーミエーションクロマトグラフィ法により、ポリスチレンを標準物質として、数平均分子量(Mn)および質量平均分子量(Mw)を測定した。ゲルパーミエーションクロマトグラフィとしては、HPLC-8220GPC(東ソー社製)を使用した。カラムとしては、shodex LF-604を3本、接続したものを使用した。検出器としては、RI検出器を使用した。標準物質としては、EasiCal PS1(Polymer Laboratories社製)を使用した。さらに、数平均分子量および質量平均分子量を測定する際は、カラムを37℃で保持し、溶離液としては、テトラヒドロフランを用い、流速を0.2mL/分とし、測定サンプルの0.5%テトラヒドロフラン溶液40μLを注入した。
フッ素原子の含有率は、1,4-ジトリフルオロメチルベンゼンを標準物質として、19F NMR測定により算出した。
酸価は、原料の配合割合から理論的に算出した。
以下の各例において用いた化合物の略号を以下に示す。
アルカリ可溶性樹脂(A1)組成物:クレゾールノボラック型エポキシ樹脂をアクリル酸、次いで1,2,3,6-テトラヒドロ無水フタル酸を反応させて、アクリロイル基とカルボキシ基とを導入した樹脂をヘキサンで精製した樹脂(アルカリ可溶性樹脂(A1)、酸価60mgKOH/g)の組成物(固形分70質量%、PGMEA30質量%)
アルカリ可溶性樹脂(A3)組成物:下記式(A-2a)で表されるビフェニル骨格を有するエポキシ樹脂にエチレン性二重結合と酸性基とを導入した樹脂(アルカリ可溶性樹脂(A3)、酸価70mgKOH/g)の組成物(固形分70質量%、PGMEA30質量%)。
IR907:2-メチル-1-[4-(メチルチオ)フェニル]-2-モルフォリノプロパン-1-オン(BASF社製、商品名IRGACURE907。)。
OXE02:エタノン1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]-1-(O-アセチルオキシム)(BASF社製、商品名:OXE02。)。
EAB:4,4'-ビス(ジエチルアミノ)ベンゾフェノン(東京化成工業社製)。
PAG-A:2-(5-メチル-2-フリル)エテニル-4,6-ビス(トリクロロメチル)-1,3,5-トリアジン(上記式(C8-2)で示される化合物)。
PAG-B:2-[2-(n-プロピルスルホニルオキシイミノ)チオフェン-3(2H)-イリデン]-2-(2-メチルフェニル)アセトニトリル(上記式(C11)で示される化合物のうち、Rb11がn-プロピル基である化合物)。
WPAG199:ビス(p-トルエンスルホニル)ジアゾメタン。
SI-150L:上記式(C0-1)で示される芳香族スルホニウムSbF6 -塩(三新化学工業社製、商品名:サンエイドSI-150L)。
エポキシA:上記式(De1)で示されるジシクロペンタン環含有のエポキシ化合物。
エポキシB:上記式(De2)で示されるナフタレン環含有のエポキシ化合物。
メラミンA:2,4,6-トリス[ビス(メトキシメチル)アミノ]-1,3,5-トリアジン(上記式(D1-1)で示される化合物)。
メラミンB:1,3,4,6-テトラキス(メトキシメチル)グリコールウリル(上記式(D3-1)で示される化合物)。
化合物(s1)に相当する化合物(s1-1):F(CF2)6CH2CH2Si(OCH3)3(公知の方法で製造した。)。
化合物(s2)に相当する化合物(s2-1):Si(OC2H5)4(コルコート社製)。
化合物(s3)に相当する化合物(s3-1):CH2=CHCOO(CH2)3Si(OCH3)3(東京化成工業社製)。
C6FMA:CH2=C(CH3)COOCH2CH2(CF2)6F
X-174DX:ジメチルシリコーン鎖含有メタクリレート(信越化学工業社製、商品名X-22-174DX)
X-8201:ジメチルシリコーン鎖含有メタクリレート(信越化学工業社製、商品名X-24-8201)
C4α-Clアクリレート:CH2=C(Cl)COOCH2CH2(CF2)4F
C8FA:CH2=CHCOOCH2CH2(CF2)8F
CHMA:シクロヘキシルメタクリレート
MAA:メタクリル酸
2-HEMA:2-ヒドロキシエチルメタクリレート
MMA:メタクリル酸メチル
GMA:グリシジルメタクリレート
IBMA:イソボルニルメタクリレート
V-70:2,2’-アゾビス(4-メトキシ-2,4-ジメチルバレロニトリル)
DSH:n-ドデシルメルカプタン
BEI:1,1-(ビスアクリロイルオキシメチル)エチルイソシアネート)
AOI:2-アクリロイルオキシエチルイソシアネート)
DBTDL:ジブチル錫ジラウレート
TBQ:t-ブチル-p-ベンゾキノン
MEK:2-ブタノン
DPHA:ジペンタエリスリトールヘキサアクリレート
(その他)
KBM403:3-グリシドキシプロピルトリメトキシシラン
チオール化合物:ペンタエリスリトールテトラキス(3-メルカプトブチレート)
MHQ:2-メチルハイドロキノン
(溶媒(J))
PGME:プロピレングリコールモノメチルエーテル
EDM:ジエチレングリコールエチルメチルエーテル
IPA:2-プロパノール
DEGDM:ジエチレングリコールジメチルエーテル
PGMEA:プロピレングリコールモノメチルエーテルアセテート
撥インク剤(E)を以下のとおり合成、または準備した。
撹拌機を備えた内容積1,000cm3のオートクレーブに、MEKの420.0g、C6FMAの99.0g、MAAの9.0g、2-HEMAの18.0g、MMAの45.0g、IBMAの9.0g、重合開始剤V-65の3.0gおよびDSHの5.0gを仕込み、窒素雰囲気下で撹拌しながら、50℃で24時間重合させ、さらに70℃にて5時間加熱し、重合開始剤を不活性化し、共重合体(撥インク剤(E-1))の溶液(固形分濃度;30質量%)を得た。この溶液を後述するネガ型感光性樹脂組成物の製造に用いた。なお、以下の撥インク剤の合成において、撥インク剤がこれを含む溶液の状態で得られたものについては、固形分濃度を測定または調整した後、該溶液の状態でネガ型感光性樹脂組成物の製造に用いた。
撹拌機を備えた内容積1,000cm3のオートクレーブに、MEKの415.1g、C6FMAの81.0g、MAAの18.0g、2-HEMAの81.0g、重合開始剤V-65の5.0gおよびDSHの4.7gを仕込み、窒素雰囲気下で撹拌しながら、50℃で24時間重合させ、さらに70℃にて5時間加熱し、重合開始剤を不活性化し、共重合体の溶液を得た。共重合体は、数平均分子量が5,540、質量平均分子量が13,200であった。
撹拌機を備えた内容積1,000cm3のオートクレーブに、MEKの420.0g、C6FMAの99.0g、MAAの9.0g、2-HEMAの18.0g、GMAの18.0g、MMAの36.0g、重合開始剤V-65の3.0gおよびDSHの5.0gを仕込み、窒素雰囲気下で撹拌しながら、50℃で24時間重合させ、さらに70℃にて5時間加熱し、重合開始剤を不活性化し、共重合体(撥インク剤(E-3))の溶液(固形分濃度;30質量%)を得た。
撥インク剤(E-4)として、メガファックRS102(商品名、DIC社製:下記式(E2F)で示される繰り返し単位を有する重合体であり、n/m=3~4である。)を準備した。撥インク剤(E-4)は、数平均分子量が5,700、質量平均分子量が8,800であり、フッ素原子の含有率は19.0質量%であった。
撹拌機を備えた内容積2,000cm3のオートクレーブに、C4α-Clアクリレートの317.5g、MAAの79.4g、IBMAの47.7g、2-HEMAの52.9g、DSHの4.6g、重合開始剤V-70の2.0g、MEKの1160gを入れ、窒素雰囲気下で撹拌しながら、50℃で24時間重合させ、さらに70℃にて5時間加熱し、重合開始剤を不活性化し、共重合体の溶液を得た。共重合体は、数平均分子量が5,060、質量平均分子量が8,720であった。固形分濃度を測定すると30質量%であった。
撹拌機を備えた内容積1Lのオートクレーブに、アセトンの555.0g、C6FMAの60.0g、X-174DXの120.0g、MAAの24.0g、CHMAの36.0g、連鎖移動剤DSHの5.4gおよび重合開始剤V-70の2.0gを仕込み、窒素雰囲気下に撹拌しながら、40℃で18時間重合させ、撥インク剤(E-6)の溶液を得た。
撹拌機を備えた内容積1Lのオートクレーブに、アセトンの555.0g、C8FAの48.0g、X-8201の120.0g、MAAの12.0g、IBMAの60.0g、連鎖移動剤DSHの10.8gおよび重合開始剤V-70の3.0gを仕込み、窒素雰囲気下に撹拌しながら、40℃で18時間重合させ、撥インク剤(E-7)の溶液を得た。
上記で得られたまたは準備した撥インク剤(E-1)~(E-7)の原料組成と特性を表1にまとめて示す。
撹拌機を備えた1,000cm3の三口フラスコに、化合物(s1-1)の15.0g、化合物(s2-1)の20.0g、化合物(s3-1)の27.0gを入れて、加水分解性シラン化合物混合物を得た。次いで、この混合物にIPAの284.3gを入れて、原料溶液とした。
なお、反応終了後、反応液の成分をガスクロマトグラフィを使用して測定し、原料としての各化合物が検出限界以下になったことを確認した。
合成例8においてモノマー成分の加水分解性シラン化合物およびその量を表2のように変更した以外は合成例8と同様にして、撥インク剤(E-9)のIPA溶液(撥インク剤(E-9)濃度:10質量%)、撥インク剤(E-10)のIPA溶液(撥インク剤(E-10)濃度:10質量%)を得た。
(ネガ型感光性樹脂組成物の製造)
アルカリ可溶性樹脂(A1)組成物を固形分(樹脂(A1))が10.0gとなる量、IR907の0.30g、OXE02の0.10g、EABの0.20g、PAG-Aの0.30g、エポキシAの1.60g、撥インク剤(E-3)の0.05g、DPHAの5.0g、EDMの30.0g、全量が100gとなるようにPGMEを加え、200cm3の撹拌用容器に入れ、3時間撹拌してネガ型感光性樹脂組成物1を製造した。
10cm四方のガラス基板をエタノールで30秒間超音波洗浄し、次いで、5分間のUV/O3処理を行った。UV/O3処理には、UV/O3発生装置としてPL2001N-58(センエンジニアリング社製)を使用した。254nm換算の光パワー(光出力)は10mW/cm2であった。
上記洗浄後のガラス基板表面に、スピンナを用いて、上記で得られたネガ型感光性樹脂組成物1を塗布した後、100℃で2分間、ホットプレート上で乾燥させ、膜厚2.4μm(例3のみ1.2μm)の乾燥膜を形成した。得られた乾燥膜に対して、365nm換算の露光パワー(露光出力)が300mW/cm2である超高圧水銀ランプのUV光を全面一括で照射した。この方法で、露光量が30mJ/cm2または50mJ/cm2となるように照射時間を調整して2種類の硬化膜を製造した。なお、いずれの場合も露光の際に、330nm以下の光はカットした。
10cm四方のガラス基板をエタノールで30秒間超音波洗浄し、次いで、5分間のUV/O3処理を行った。UV/O3処理には、UV/O3発生装置としてPL2001N-58(センエンジニアリング社製)を使用した。254nm換算の光パワー(光出力)は10mW/cm2であった。
10cm四方のガラス基板をエタノールで30秒間超音波洗浄し、次いで、5分間のUV/O3処理を行った。UV/O3処理には、UV/O3発生装置としてPL2001N-58(センエンジニアリング社製)を使用した。254nm換算の光パワー(光出力)は10mW/cm2であった。
ガラス基板上にITO層を有するITO基板を用い、そのITO層上に、スピンナを用いて、上記ネガ型感光性樹脂組成物1を塗布した後、100℃で2分間ホットプレート上で乾燥させ、膜厚2.4μm(例3のみ1.2μm)の乾燥膜を形成した。得られた乾燥膜に対して、開口パターンを有するフォトマスク(遮光部が100μm×200μm、光透過部が20μmの格子状パターン)を介して、365nm換算の露光パワー(露光出力)が300mW/cm2である超高圧水銀ランプのUV光を全面一括照射した。露光の際に、330nm以下の光はカットした。また、乾燥膜とフォトマスクとの離間距離は50μmとした。各例において、露光条件は、露光時間が4秒間であり、露光量が100mJ/cm2であった。
(評価)
<硬化膜の膜厚>
レーザ顕微鏡(キーエンス社製、装置名:VK-8500)を用いて測定した。
上記で得られた硬化膜上面のPGMEA接触角を下記の方法で測定し、撥インク性の評価とした。
静滴法により、JIS R3257「基板ガラス表面のぬれ性試験方法」に準拠して、硬化膜上面3ヶ所にPGMEA滴を載せ、各PGMEA滴について測定した。液滴は2μL/滴とし、測定は20℃で行った。接触角は、3測定値の平均値から求めた。
上記で得られた硬化膜上面のPGMEA接触角を上記の方法で測定した。
○:接触角40度以上、45度未満
△:接触角35度以上、40度未満
×:接触角35度未満
パターン膜1に関し、下記の基準でパターン形成性を評価した。ライン/スペースが20μm/50μmのライン部分の線幅を測定した。
◎:マスク寸法に対し、±3μm以内の線幅である。
○:マスク寸法に対し、±3μm超5μm以内の線幅である。
×:マスク寸法に対し、線幅が±5μm超である、または、剥離が生じた。
パターン膜2に関し、下記の基準で長時間現像に対する耐剥離性を評価した。
◎:少なくとも10μmの線幅のラインが残っている。
○:少なくとも20μmの線幅のラインが残っている。
×:すべてのライン/スペースサンプルにおいてライン部分が剥離した。
パターン膜3付きのITO基板における開口部の中央部分について以下の条件でX線光電子分光法(XPS)により表面解析を行った。XPSにより測定された開口部表面のF/In値(F1s/In3d5;炭素原子濃度に対するインジウム原子濃度の比の値)が1.0未満のものを「◎」、1.0~2.0のものを「○」、2.0以上のものを「×」とした。
装置:アルバックファイ社製Quantera‐SXM
X線源:Al Kα
X線のビームサイズ:約20μmφ
測定エリア:約20μmφ
検出角:試料面から45°
測定ピーク:F1s
測定時間(Acquired Timeとして):5分以内
解析ソフト:MultiPak
例1において、ネガ型感光性樹脂組成物を表3、表4または表5に示す組成に変更した以外は、同様の方法で、ネガ型感光性樹脂組成物および隔壁、硬化膜を製造し、例1と同様の評価を行った。各例の評価結果をそれぞれネガ型感光性樹脂組成物の組成とともに表3、表4および表5に示す。
Claims (9)
- 光硬化性を有するアルカリ可溶性樹脂またはアルカリ可溶性単量体(A)と、光ラジカル重合開始剤(B)と、光酸発生剤(C)と、酸硬化剤(D)と、フッ素原子を有する撥インク剤(E)とを含有することを特徴とするネガ型感光性樹脂組成物。
- 分子内に2つ以上の不飽和二重結合を有し、酸性基およびフッ素原子のいずれも有しない化合物(F)をさらに含有することを特徴とする、請求項1に記載のネガ型感光性樹脂組成物。
- 前記酸硬化剤(D)がメラミン系化合物、尿素系化合物およびエポキシ系化合物から選ばれる、少なくとも1種である、請求項1または2に記載のネガ型感光性樹脂組成物。
- 有機EL素子、量子ドットディスプレイ、TFTアレイまたは薄膜太陽電池の製造に用いられる請求項1~3のいずれか1項に記載のネガ型感光性樹脂組成物。
- 請求項1~4のいずれか1項に記載のネガ型感光性樹脂組成物を用いて形成されることを特徴とする樹脂硬化膜。
- 基板表面をドット形成用の複数の区画に仕切る形に形成された隔壁であって、請求項5に記載の樹脂硬化膜からなることを特徴とする隔壁。
- 基板表面に複数のドットと隣接するドット間に位置する隔壁とを有する光学素子であって、前記隔壁が請求項6に記載の隔壁で形成されていることを特徴とする光学素子。
- 前記光学素子は、有機EL素子、量子ドットディスプレイ、TFTアレイまたは薄膜太陽電池である請求項7に記載の光学素子。
- 前記ドットがインクジェット法で形成されていることを特徴とする請求項7または8に記載の光学素子。
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| CN108415220A (zh) * | 2017-02-09 | 2018-08-17 | 东友精细化工有限公司 | 黑色感光性树脂组合物、由其衍生的有机发光元件、量子点发光元件及显示装置 |
| JP2018129292A (ja) * | 2017-02-09 | 2018-08-16 | 東友ファインケム株式会社Dongwoo Fine−Chem Co., Ltd. | 黒色感光性樹脂組成物、これから誘導された有機発光素子、量子ドット発光素子、並びにディスプレイ装置 |
| WO2018155016A1 (ja) * | 2017-02-21 | 2018-08-30 | 日本ゼオン株式会社 | ネガ型感光性樹脂組成物 |
| TWI698709B (zh) * | 2017-09-15 | 2020-07-11 | 南韓商Lg化學股份有限公司 | 化學放大光阻組成物、光阻圖案及製備光阻圖案的方法 |
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| WO2021177253A1 (ja) * | 2020-03-04 | 2021-09-10 | Agc株式会社 | ポジ型感光性樹脂組成物 |
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| JPWO2022210797A1 (ja) * | 2021-03-29 | 2022-10-06 | ||
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| WO2024166559A1 (ja) * | 2023-02-06 | 2024-08-15 | 信越化学工業株式会社 | 感光性樹脂組成物、感光性樹脂皮膜、感光性ドライフィルム及びパターン形成方法 |
| JP2024111661A (ja) * | 2023-02-06 | 2024-08-19 | 信越化学工業株式会社 | 感光性樹脂組成物、感光性樹脂皮膜、感光性ドライフィルム及びパターン形成方法 |
| WO2025018168A1 (ja) * | 2023-07-18 | 2025-01-23 | Dic株式会社 | レベリング剤、レジスト組成物及び偏光板 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102411740B1 (ko) | 2022-06-21 |
| JPWO2016010077A1 (ja) | 2017-04-27 |
| TW201619694A (zh) | 2016-06-01 |
| CN106662815A (zh) | 2017-05-10 |
| CN106662815B (zh) | 2020-06-16 |
| JP6536578B2 (ja) | 2019-07-03 |
| KR20170032318A (ko) | 2017-03-22 |
| TWI660239B (zh) | 2019-05-21 |
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