WO2016167347A1 - 電子デバイス用封止剤及び電子デバイスの製造方法 - Google Patents
電子デバイス用封止剤及び電子デバイスの製造方法 Download PDFInfo
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- WO2016167347A1 WO2016167347A1 PCT/JP2016/062111 JP2016062111W WO2016167347A1 WO 2016167347 A1 WO2016167347 A1 WO 2016167347A1 JP 2016062111 W JP2016062111 W JP 2016062111W WO 2016167347 A1 WO2016167347 A1 WO 2016167347A1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
- C09K3/1018—Macromolecular compounds having one or more carbon-to-silicon linkages
-
- 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
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/30—Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen and nitrogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
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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
- H05B33/02—Details
- H05B33/04—Sealing arrangements, e.g. against humidity
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
- H10K10/80—Constructional details
- H10K10/88—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/80—Constructional details
- H10K30/88—Passivation; Containers; Encapsulations
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0645—Macromolecular organic compounds, e.g. prepolymers obtained otherwise than by reactions involving carbon-to-carbon unsaturated bonds
- C09K2200/0647—Polyepoxides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a sealant for electronic devices that can be easily applied by an ink jet method and can reduce damage to an ink jet apparatus. Moreover, this invention relates to the manufacturing method of an electronic device using this sealing agent for electronic devices.
- organic thin film elements such as organic electroluminescence (hereinafter also referred to as organic EL) display elements and organic thin film solar cell elements
- organic EL organic electroluminescence
- the organic thin film element can be easily produced by vacuum deposition, solution coating, or the like, and thus has excellent productivity.
- An organic EL display element has a laminated structure in which an organic light emitting material layer is sandwiched between a pair of electrodes facing each other, and electrons are injected from one electrode into the organic light emitting material layer and positive from the other electrode. When holes are injected, electrons and holes are combined in the organic light emitting material layer to emit light.
- the organic EL display element since the organic EL display element performs self-emission, it has better visibility than a liquid crystal display element that requires a backlight, can be reduced in thickness, and can be driven by a DC low voltage. Has the advantage.
- Non-Patent Document 1 discloses an organic solar cell element using a laminated film of phthalocyanine copper and a perylene dye.
- Patent Document 1 discloses a method of sealing an organic light emitting material layer and an electrode of an organic EL display element with a laminated film of a silicon nitride film and a resin film formed by a CVD method.
- the resin film has a role of preventing pressure on the organic layer and the electrode due to internal stress of the silicon nitride film.
- Patent Document 1 discloses a method of alternately depositing an inorganic material film and a resin film
- Patent Document 3 and Patent Document 4 disclose. A method of forming a resin film on an inorganic material film is disclosed.
- a method for forming a resin film there is a method in which a liquid curable resin composition is applied on a substrate using an inkjet method, and then the curable resin composition is cured. If such a coating method by the ink jet method is used, a resin film can be uniformly formed at high speed.
- the sealing agent for electronic devices which consists of curable resin composition
- the resin film manufactured using an organic solvent has problems such as deterioration of the organic light emitting material layer due to the remaining organic solvent and generation of outgas due to plasma.
- a curable resin having a low molecular weight is used. In such a case, there has been a problem of damaging the apparatus such as swelling of an adhesive or a rubber material used for a head portion of the ink jet apparatus.
- An object of this invention is to provide the sealing agent for electronic devices which can be apply
- Another object of the present invention is to provide an electronic device manufacturing method using the electronic device sealant.
- the present invention is an electronic device sealant that contains a curable resin, a polymerization initiator and / or a thermosetting agent, and is used for coating by an inkjet method, wherein the curable resin is represented by the following formula (1).
- the sealing agent for electronic devices containing the silicone compound represented by this.
- R 1 represents an alkyl group having 1 to 10 carbon atoms
- X 1 and X 2 are each independently an alkyl group having 1 to 10 carbon atoms, or the following formula (2-1) , (2-2), (2-3), or (2-4)
- X 3 represents the following formulas (2-1), (2-2), (2-3) ) Or a group represented by (2-4).
- m is an integer from 0 to 100
- n is an integer from 0 to 100.
- at least one of X 1 and X 2 is represented by the following formula (2-1), (2-2), (2-3), or (2-4) Represents a group.
- R 2 represents a bond or an alkylene group having 1 to 6 carbon atoms.
- R 3 represents hydrogen or 1 to carbon atoms.
- 6 represents an alkyl group
- R 4 represents a bond or a methylene group
- R 5 represents hydrogen or a methyl group.
- the present inventors have found that a silicone compound having a specific structure is difficult to swell rubber materials and adhesives, and because the intermolecular force is weak, the viscosity does not become too high even if the molecular weight is large to some extent. It was. Therefore, the present inventors can encapsulate the silicone compound having the specific structure as a curable resin so that it can be easily applied by an ink jet method and can reduce damage to an ink jet apparatus. The present inventors have found that an agent can be obtained and have completed the present invention. Moreover, since the silicone compound which has this specific structure has low surface tension, the sealing agent for electronic devices obtained is excellent in wet-spreading property, and can be easily thinned by an inkjet method.
- the sealing agent for electronic devices of this invention contains curable resin.
- the curable resin contains a silicone compound represented by the above formula (1).
- the encapsulant for electronic devices of the present invention has a viscosity suitable for application by an ink jet method and can reduce apparatus damage. .
- the preferable lower limit of m is 1, and the preferable upper limit is 10.
- m is 1 or more, the effect of suppressing the swelling of the rubber material and the adhesive is excellent.
- m is 10 or less, the ink jet coating property and the low outgassing property are excellent, and the cured product has a more suitable hardness.
- a more preferable upper limit of m is 5.
- the preferable upper limit of n is 10. When n is 10 or less, the ink jet coating property and the low outgassing property are excellent, and the cured product has a more suitable hardness. The more preferable upper limit of n is 5.
- the silicone compound represented by the formula (1) at least one of X 1 , X 2 , and X 3 in the formula (1) is represented by the formula (2-1), (2-2), or And a compound represented by the formula (3-1), a compound represented by the following formula (3-1), a compound represented by the following formula (3-2), and a compound represented by the following formula: More preferably, it is at least one selected from the group consisting of compounds represented by (3-3).
- o is an integer of 1 to 10
- p is an integer of 1 to 10
- q is 1 An integer of ⁇ 10.
- o in formula (3-1) and p in formula (3-2) are each preferably an integer of 1 to 6.
- the curable resin may contain other curable resins for the purpose of improving adhesiveness.
- the other curable resin include an epoxy compound having no structure represented by the above formula (1) (hereinafter, also referred to as “other epoxy compound”) and a structure represented by the above formula (1).
- Oxetane compounds hereinafter also referred to as “other oxetane compounds”
- (meth) acrylic compounds not having the structure represented by the above formula (1) hereinafter also referred to as “other (meth) acrylic compounds”
- at least one selected from the group consisting of vinyl ether compounds at least one selected from the group consisting of vinyl ether compounds.
- (meth) acryl means acryl or methacryl
- (meth) acryl compound means a compound having a (meth) acryloyl group
- (meth) acryloyl means a compound having a (meth) acryloyl group
- (meth) acryloyl means a compound having a (meth) acryloyl group
- (meth) acryloyl means a compound having a (meth) acryloyl group
- (meth) acryloyl means a compound having a (meth) acryloyl group
- Examples of the other epoxy compounds include bisphenol A type epoxy resin, bisphenol E type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, bisphenol O type epoxy resin, and 2,2′-diallyl bisphenol A type epoxy.
- alicyclic epoxy resins are preferred.
- examples of commercially available alicyclic epoxy resins include Celoxide 2000, Celoxide 2021P, Celoxide 2081, Celoxide 3000, Celoxide 8000, Cyclomer M-100 (all manufactured by Daicel), and Sunsizer EPS ( New Nippon Rika Kogyo Co., Ltd.).
- those having no ether bond and ester bond other than those contained in the epoxy group are preferable from the viewpoint of suppressing the generation of outgas.
- Examples of commercially available alicyclic epoxy resins having no ether bond and no ester bond other than those contained in the epoxy group include Celoxide 2000, Celoxide 3000, and Celoxide 8000. These other epoxy compounds may be used alone or in combination of two or more.
- Examples of the other oxetane compounds include 3- (allyloxy) oxetane, phenoxymethyl oxetane, 3-ethyl-3-hydroxymethyloxetane, 3-ethyl-3- (phenoxymethyl) oxetane, 3-ethyl-3-((2 -Ethylhexyloxy) methyl) oxetane, 3-ethyl-3-((3- (triethoxysilyl) propoxy) methyl) oxetane, 3-ethyl-3 ((((3-ethyloxetane-3-yl) methoxy) methyl) And oxetane, oxetanylsilsesquioxane, phenol novolac oxetane, 1,4-bis (((3-ethyl-3-oxetanyl) methoxy) methyl) benzene, and the like.
- Examples of the other (meth) acrylic compounds include glycidyl (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, and dicyclopentenyl (meth) acrylate. , Dicyclopentenyloxyethyl (meth) acrylate, dicyclopentanyl (meth) acrylate, benzyl (meth) acrylate, trimethylolpropane tri (meth) arylate, 1,12-dodecanediol di (meth) acrylate, lauryl (meth) ) Acrylate and the like. These other (meth) acrylic compounds may be used alone or in combination of two or more.
- the “(meth) acrylate” means acrylate or methacrylate.
- vinyl ether compound examples include benzyl vinyl ether, cyclohexane dimethanol monovinyl ether, dicyclopentadiene vinyl ether, 1,4-butanediol divinyl ether, cyclohexane dimethanol divinyl ether, diethylene glycol divinyl ether, triethylene glycol divinyl ether, dipropylene glycol. Examples thereof include divinyl ether and tripropylene glycol divinyl ether. These vinyl ether compounds may be used alone or in combination of two or more.
- alicyclic epoxy resins 3- (allyloxy) oxetane, 3-ethyl-3-((2-ethylhexyloxy) methyl) oxetane have low viscosity and high reactivity. And at least one selected from the group consisting of 3-ethyl-3 (((3-ethyloxetane-3-yl) methoxy) methyl) oxetane.
- the preferable lower limit of the content of the silicone compound represented by the formula (1) is 5 parts by weight with respect to 100 parts by weight of the entire curable resin.
- the content of the silicone compound represented by the above formula (1) is 5 parts by weight or more, both the effect of excellent applicability by the ink jet method and the effect of reducing damage of the ink jet device are obtained.
- the minimum with more preferable content of the silicone compound represented by the said Formula (1) is 10 weight part.
- the other curable resin may not be contained, but when the other curable resin is contained, the content of the silicone compound represented by the formula (1) is 100% of the entire curable resin.
- a preferable upper limit is 90 parts by weight with respect to parts by weight. When the content of the silicone compound represented by the above formula (1) is 90 parts by weight or less, the other curable resin can exhibit more effects such as improving the adhesiveness.
- the encapsulant for electronic devices of the present invention contains a polymerization initiator and / or a thermosetting agent.
- a polymerization initiator a cationic photopolymerization initiator, a thermal cationic polymerization initiator, a radical photopolymerization initiator, and a thermal radical polymerization initiator are preferably used.
- the photocationic polymerization initiator is not particularly limited as long as it generates a protonic acid or a Lewis acid by light irradiation, and may be an ionic photoacid generating type or a nonionic photoacid generating type. May be.
- Examples of the ionic photoacid-generating photocationic polymerization initiator include an anion moiety of BF 4 ⁇ , PF 6 ⁇ , SbF 6 ⁇ , or (BX 4 ) ⁇ (wherein X is at least two or more.
- aromatic sulfonium salt examples include bis (4- (diphenylsulfonio) phenyl) sulfide bishexafluorophosphate, bis (4- (diphenylsulfonio) phenyl) sulfide bishexafluoroantimonate, and bis (4- ( Diphenylsulfonio) phenyl) sulfide bistetrafluoroborate, bis (4- (diphenylsulfonio) phenyl) sulfide tetrakis (pentafluorophenyl) borate, diphenyl-4- (phenylthio) phenylsulfonium hexafluorophosphate, diphenyl-4- ( Phenylthio) phenylsulfonium hexafluoroantimonate, diphenyl-4- (phenylthio) phenylsulfonium tetraflu
- aromatic iodonium salt examples include diphenyliodonium hexafluorophosphate, diphenyliodonium hexafluoroantimonate, diphenyliodonium tetrafluoroborate, diphenyliodonium tetrakis (pentafluorophenyl) borate, bis (dodecylphenyl) iodonium hexafluorophosphate, bis (Dodecylphenyl) iodonium hexafluoroantimonate, bis (dodecylphenyl) iodonium tetrafluoroborate, bis (dodecylphenyl) iodonium tetrakis (pentafluorophenyl) borate, 4-methylphenyl-4- (1-methylethyl) phenyliodonium hexa Fluorophosphate, 4-methylphenyl-4- (1-methylethy
- aromatic diazonium salt examples include phenyldiazonium hexafluorophosphate, phenyldiazonium hexafluoroantimonate, phenyldiazonium tetrafluoroborate, and phenyldiazonium tetrakis (pentafluorophenyl) borate.
- aromatic ammonium salt examples include 1-benzyl-2-cyanopyridinium hexafluorophosphate, 1-benzyl-2-cyanopyridinium hexafluoroantimonate, 1-benzyl-2-cyanopyridinium tetrafluoroborate, 1-benzyl -2-Cyanopyridinium tetrakis (pentafluorophenyl) borate, 1- (naphthylmethyl) -2-cyanopyridinium hexafluorophosphate, 1- (naphthylmethyl) -2-cyanopyridinium hexafluoroantimonate, 1- (naphthylmethyl)
- Examples include -2-cyanopyridinium tetrafluoroborate and 1- (naphthylmethyl) -2-cyanopyridinium tetrakis (pentafluorophenyl) borate.
- Examples of the (2,4-cyclopentadien-1-yl) ((1-methylethyl) benzene) -Fe salt include (2,4-cyclopentadien-1-yl) ((1-methylethyl) benzene.
- nonionic photoacid-generating photocationic polymerization initiator examples include nitrobenzyl ester, sulfonic acid derivative, phosphoric acid ester, phenol sulfonic acid ester, diazonaphthoquinone, N-hydroxyimide sulfonate, and the like.
- photocationic polymerization initiators examples include, for example, DTS-200 (manufactured by Midori Chemical Co., Ltd.), UVI6990, UVI6974 (all manufactured by Union Carbide), SP-150, SP-170 (all ADEKA), FC-508, FC-512 (all from 3M), IRGACURE261, IRGACURE290 (from BASF), PI2074 (from Rhodia), and the like.
- the anion moiety is BF 4 ⁇ , PF 6 ⁇ , SbF 6 ⁇ , or (BX 4 ) ⁇ (where X is substituted with at least two fluorine or trifluoromethyl groups
- a sulfonium salt, a phosphonium salt, an ammonium salt, and the like are preferable.
- sulfonium salt examples include triphenylsulfonium tetrafluoroborate and triphenylsulfonium hexafluoroantimonate.
- Examples of the phosphonium salt include ethyltriphenylphosphonium hexafluoroantimonate and tetrabutylphosphonium hexafluoroantimonate.
- ammonium salt examples include dimethylphenyl (4-methoxybenzyl) ammonium hexafluorophosphate, dimethylphenyl (4-methoxybenzyl) ammonium hexafluoroantimonate, dimethylphenyl (4-methoxybenzyl) ammonium tetrakis (pentafluorophenyl).
- thermal cationic polymerization initiators include, for example, Sun-Aid SI-60, Sun-Aid SI-80, Sun-Aid SI-B3, Sun-Aid SI-B3A, Sun-Aid SI-B4 (all of which are Sanshin Chemical Industry Co., Ltd.). CXC1612, CXC1821 (all manufactured by King Industries) and the like.
- photo radical polymerization initiator examples include benzophenone compounds, acetophenone compounds, acylphosphine oxide compounds, titanocene compounds, oxime ester compounds, benzoin ether compounds, benzyl, thioxanthone compounds, and the like.
- Examples of commercially available radical photopolymerization initiators include IRGACURE 184, IRGACURE 369, IRGACURE 379, IRGACURE 651, IRGACURE 819, IRGACURE 907, IRGACURE 2959, IRGACURE OXE01, and Lucin TPO (both BASF-IN, Ether)
- Examples include benzoin ethyl ether and benzoin isopropyl ether (both manufactured by Tokyo Chemical Industry Co., Ltd.).
- thermal radical polymerization initiator what consists of an azo compound, an organic peroxide, etc. is mentioned, for example.
- the azo compound include 2,2′-azobis (2,4-dimethylvaleronitrile), azobisisobutyronitrile, and the like.
- the organic peroxide include benzoyl peroxide, ketone peroxide, peroxyketal, hydroperoxide, dialkyl peroxide, peroxyester, diacyl peroxide, and peroxydicarbonate.
- thermal radical polymerization initiators examples include VPE-0201, VPE-0401, VPE-0601, VPS-0501, VPS-1001, and V-501 (all manufactured by Wako Pure Chemical Industries, Ltd.). ) And the like.
- the content of the polymerization initiator is preferably 0.01 parts by weight and preferably 10 parts by weight with respect to 100 parts by weight of the curable resin.
- the content of the polymerization initiator is 0.01 parts by weight or more, the obtained encapsulant for electronic devices is more excellent in curability.
- the content of the polymerization initiator is 10 parts by weight or less, the curing reaction of the obtained sealant for electronic devices does not become too fast, and the workability becomes excellent, and the cured product becomes more uniform. be able to.
- the minimum with more preferable content of the said polymerization initiator is 0.05 weight part, and a more preferable upper limit is 5 weight part.
- thermosetting agent examples include hydrazide compounds, imidazole derivatives, acid anhydrides, dicyandiamides, guanidine derivatives, modified aliphatic polyamines, addition products of various amines and epoxy resins, and the like.
- hydrazide compound examples include 1,3-bis (hydrazinocarbonoethyl-5-isopropylhydantoin), sebacic acid dihydrazide, isophthalic acid dihydrazide, adipic acid dihydrazide, malonic acid dihydrazide, and the like.
- imidazole derivatives examples include 1-cyanoethyl-2-phenylimidazole, N- (2- (2-methyl-1-imidazolyl) ethyl) urea, 2,4-diamino-6- (2′-methylimidazolyl- (1 ′))-ethyl-s-triazine, N, N′-bis (2-methyl-1-imidazolylethyl) urea, N, N ′-(2-methyl-1-imidazolylethyl) -adipamide, 2- Examples include phenyl-4-methyl-5-hydroxymethylimidazole and 2-phenyl-4,5-dihydroxymethylimidazole.
- acid anhydride examples include tetrahydrophthalic anhydride, ethylene glycol bis (anhydrotrimellitate), and the like. These thermosetting agents may be used independently and 2 or more types may be used in combination.
- thermosetting agents examples include SDH, ADH (all manufactured by Otsuka Chemical Co., Ltd.), Amicure VDH, Amicure VDH-J, Amicure UDH (all manufactured by Ajinomoto Fine Techno Co., Ltd.), and the like. It is done.
- the content of the thermosetting agent is preferably 0.5 parts by weight and preferably 30 parts by weight with respect to 100 parts by weight of the curable resin.
- the content of the thermosetting agent is 0.5 parts by weight or more, the obtained electronic device sealing agent is more excellent in thermosetting.
- the content of the thermosetting agent is 30 parts by weight or less, the obtained sealing agent for electronic devices is excellent in storage stability, and the cured product is excellent in moisture resistance.
- the minimum with more preferable content of the said thermosetting agent is 1 weight part, and a more preferable upper limit is 15 weight part.
- the encapsulant for electronic devices of the present invention may contain a sensitizer.
- the sensitizer has a role of further improving the polymerization initiation efficiency of the polymerization initiator and further promoting the curing reaction of the electronic device sealing agent of the present invention.
- sensitizer examples include thioxanthone compounds such as 2,4-diethylthioxanthone, 2,2-dimethoxy-1,2-diphenylethane-1-one, benzophenone, 2,4-dichlorobenzophenone, o- Examples include methyl benzoylbenzoate, 4,4′-bis (dimethylamino) benzophenone, 4-benzoyl-4′-methyldiphenyl sulfide, and the like.
- thioxanthone compounds such as 2,4-diethylthioxanthone, 2,2-dimethoxy-1,2-diphenylethane-1-one, benzophenone, 2,4-dichlorobenzophenone, o- Examples include methyl benzoylbenzoate, 4,4′-bis (dimethylamino) benzophenone, 4-benzoyl-4′-methyldiphenyl sulfide, and the like.
- the content of the sensitizer is preferably 0.01 parts by weight and preferably 3 parts by weight with respect to 100 parts by weight of the curable resin.
- the content of the sensitizer is 0.01 parts by weight or more, the sensitizing effect is more exhibited.
- the content of the sensitizer is 3 parts by weight or less, light can be transmitted to a deep part without excessive absorption.
- the minimum with more preferable content of the said sensitizer is 0.1 weight part, and a more preferable upper limit is 1 weight part.
- the sealing agent for electronic devices of this invention contains a silane coupling agent further.
- the said silane coupling agent has a role which improves the adhesiveness of the sealing agent for electronic devices of this invention, a board
- silane coupling agent examples include 3-aminopropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-isocyanatopropyltrimethoxysilane, and the like. These silane compounds may be used independently and 2 or more types may be used together.
- the content of the silane coupling agent is preferably 0.1 parts by weight and preferably 10 parts by weight with respect to 100 parts by weight of the curable resin.
- the minimum with more preferable content of the said silane coupling agent is 0.5 weight part, and a more preferable upper limit is 5 weight part.
- the encapsulant for electronic devices of the present invention may contain a curing retarder. By containing the said hardening retarder, the pot life of the sealing agent for electronic devices obtained can be lengthened.
- a polyether compound etc. are mentioned, for example.
- the polyether compound include polyethylene glycol, polypropylene glycol, polytetramethylene glycol, and a crown ether compound. Of these, crown ether compounds are preferred.
- the content of the curing retarder is preferably 0.05 parts by weight and preferably 5.0 parts by weight with respect to 100 parts by weight of the curable resin. When the content of the curing retarder is within this range, the retardation effect can be further exhibited while suppressing the generation of outgas when the obtained sealing agent for electronic devices is cured.
- the minimum with more preferable content of the said retarder is 0.1 weight part, and a more preferable upper limit is 3.0 weight part.
- the encapsulant for electronic devices of the present invention may further contain a surface modifier as long as the object of the present invention is not impaired.
- a surface modifier By containing the surface modifier, the flatness of the coating film can be imparted to the electronic device sealant of the present invention.
- the surface modifier include surfactants and leveling agents.
- surfactant and the leveling agent examples include silicones, acrylics, and fluorines.
- examples of commercially available surfactants and leveling agents include BYK-340, BYK-345 (both manufactured by Big Chemie Japan), Surflon S-611 (manufactured by AGC Seimi Chemical), and the like. Can be mentioned.
- the encapsulant for electronic devices of the present invention is a compound or ion exchange resin that reacts with an acid generated in the encapsulant in order to improve the durability of the element electrode within a range that does not impair the transparency of the cured product. You may contain.
- Examples of the compound that reacts with the generated acid include substances that neutralize the acid, such as carbonates or bicarbonates of alkali metals or alkaline earth metals.
- carbonates or bicarbonates of alkali metals or alkaline earth metals such as calcium carbonate, calcium hydrogen carbonate, sodium carbonate, sodium hydrogen carbonate and the like are used.
- any of a cation exchange type, an anion exchange type, and a both ion exchange type can be used, and in particular, a cation exchange type or a both ion exchange type capable of adsorbing chloride ions. Is preferred.
- the sealing agent for electronic devices of this invention may contain well-known various additives, such as a reinforcing agent, a softening agent, a plasticizer, a viscosity modifier, a ultraviolet absorber, antioxidant, as needed. Good.
- a method for producing the sealing agent for electronic devices of the present invention for example, using a mixer such as a homodisper, a homomixer, a universal mixer, a planetary mixer, a kneader, or a three roll, a curable resin and a polymerization
- a mixer such as a homodisper, a homomixer, a universal mixer, a planetary mixer, a kneader, or a three roll, a curable resin and a polymerization
- a mixer such as a homodisper, a homomixer, a universal mixer, a planetary mixer, a kneader, or a three roll
- a curable resin and a polymerization examples thereof include a method of mixing an initiator and / or a thermosetting agent and an additive such as a silane coupling agent added as necessary.
- the electronic device sealant of the present invention has a preferred lower limit of 5 mPa ⁇ s and a preferred upper limit of 200 mPa ⁇ s, measured using an E-type viscometer at 25 ° C. and 100 rpm.
- the sealing agent for electronic devices of the present invention is more excellent in ink jet coating property and shape retention after coating.
- the minimum with a more preferable viscosity of the said sealing agent for electronic devices is 10 mPa * s, and a more preferable upper limit is 80 mPa * s.
- the sealing agent for electronic devices of this invention may be heated at the time of application
- the preferable lower limit of the total light transmittance of light at a wavelength of 380 to 800 nm of the cured product of the encapsulant for electronic devices of the present invention is 80%.
- the total light transmittance is 80% or more, it can be suitably used for an organic EL display element or the like.
- a more preferable lower limit of the total light transmittance is 85%.
- the encapsulant for electronic devices of the present invention preferably has a transmittance at 400 nm of 85% or more at an optical path length of 20 ⁇ m after the cured product is irradiated with ultraviolet rays for 100 hours.
- the transmittance after irradiating the ultraviolet rays for 100 hours is 85% or more, the transparency is excellent, the loss of light emission is small, and the color reproducibility is excellent.
- a more preferable lower limit of the transmittance after irradiation with the ultraviolet rays for 100 hours is 90%, and a more preferable lower limit is 95%.
- the light source for irradiating the ultraviolet rays a conventionally known light source such as a xenon lamp or a carbon arc lamp can be used.
- the electronic device sealant of the present invention has a moisture permeability of 100 g / m 2 at a thickness of 100 ⁇ m as measured by exposing a cured product to an environment of 85 ° C. and 85% RH for 24 hours in accordance with JIS Z 0208.
- the following is preferable.
- the moisture permeability is 100 g / m 2 or less, for example, when used in the manufacture of an organic EL display element as an electronic device, the effect of suppressing the generation of dark spots due to moisture reaching the organic light emitting material layer It will be excellent.
- the sealing agent for electronic devices of the present invention preferably has a moisture content of less than 0.5% when the cured product is exposed to an environment of 85 ° C. and 85% RH for 24 hours.
- the moisture content of the cured product is less than 0.5%, for example, when used for manufacturing an organic EL display element as an electronic device, the effect of suppressing deterioration of the organic light-emitting material layer due to moisture in the cured product It will be excellent.
- a more preferable upper limit of the moisture content of the cured product is 0.3%.
- the method for measuring the moisture content include a method of obtaining by a Karl Fischer method in accordance with JIS K 7251, and a method of obtaining a weight increment after water absorption in accordance with JIS K 7209-2.
- the sealing agent for electronic devices of this invention is used for application
- the manufacturing method of an electronic device which has the process of bonding together the said 2 base material is also one of this invention.
- the electronic device sealant of the present invention may be applied to the entire surface of the substrate. You may apply to a part.
- the shape of the sealing part of the sealing agent for electronic devices of the present invention formed by coating is to protect the laminate having an organic light emitting material layer from the outside air.
- the shape is not particularly limited as long as it can be formed, and may be a shape that completely covers the laminate, or may form a closed pattern on the periphery of the laminate, or the periphery of the laminate A pattern having a shape in which a part of the openings is provided may be formed.
- the base material (hereinafter also referred to as one base material) to which the electronic device sealing agent of the present invention is applied is formed of a laminate having an organic light emitting material layer.
- the base material which this may be may be sufficient, and the base material in which this laminated body is not formed may be sufficient.
- the one base material is a base material on which the laminate is not formed, the one base material of the present invention can be protected from the outside air when the other base material is bonded. What is necessary is just to apply
- the sealing agent portion having a closed pattern may be formed in a shape that fits in the shape.
- the said laminated body may be coat
- the inorganic material forming the inorganic material layer can be a conventionally known, for example, silicon nitride (SiN x), silicon oxide (SiO x), and the like.
- the inorganic material film may be a single layer or may be a laminate of a plurality of types of layers. Moreover, you may coat
- the step of curing the electronic device sealant by light irradiation and / or heating may be performed before the step of bonding the two substrates, or the step of bonding the two substrates. It may be done later.
- the electronic device sealant of the present invention comprises light irradiation and It is preferable that the pot life is 1 minute or more from the heating until the curing reaction proceeds and adhesion cannot be performed. When the pot life is 1 minute or longer, the progress of curing before bonding the two substrates can be suppressed, and the adhesive strength after bonding can be further increased.
- the electronic device sealant of the present invention is preferably applied by irradiating light with a wavelength of 300 nm to 400 nm and an integrated light amount of 300 to 3000 mJ / cm 2. It can be cured.
- Examples of the light source for irradiating the electronic device sealant of the present invention with light include a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, an excimer laser, a chemical lamp, a black light lamp, and a microwave excitation mercury lamp. , Metal halide lamps, sodium lamps, halogen lamps, xenon lamps, LED lamps, fluorescent lamps, sunlight, electron beam irradiation devices, and the like. These light sources may be used independently and 2 or more types may be used together. These light sources are appropriately selected according to the absorption wavelength of the photocationic polymerization initiator or the photoradical polymerization initiator.
- Examples of the light irradiation means for the electronic device sealant of the present invention include simultaneous irradiation of various light sources, sequential irradiation with a time difference, combined irradiation of simultaneous irradiation and sequential irradiation, etc. Irradiation means may be used.
- the heating temperature is preferably 50 to 120 ° C.
- the method of bonding the two substrates is not particularly limited, but it is preferable to bond the substrates in a reduced pressure atmosphere.
- the preferable lower limit of the degree of vacuum in the reduced-pressure atmosphere is 0.01 kPa, and the preferable upper limit is 10 kPa.
- the degree of vacuum in the reduced-pressure atmosphere is within this range, it is not necessary to spend a long time to achieve a vacuum state due to the airtightness of the vacuum device and the ability of the vacuum pump. Bubbles can be more efficiently removed from the encapsulant for electronic devices of the present invention.
- the sealing compound for electronic devices which can be apply
- the manufacturing method of an electronic device using this sealing agent for electronic devices can be provided.
- Example 1 As a silicone compound represented by the above formula (1), 100 parts by weight of a compound (“X-22-163” manufactured by Shin-Etsu Chemical Co., Ltd.) in which o in the above formula (3-1) is 1, a photocation As a polymerization initiator, 1 part by weight of tris (4- (4-acetylphenyl) thiophenyl) sulfonium tetrakis (pentafluorophenyl) borate (manufactured by BASF, “IRGACURE290”) is mixed with a homodisper type stirring mixer (manufactured by PRIMIX Corporation). , “Homodisper L-type”), and uniformly stirred and mixed at a stirring speed of 3000 rpm to prepare an electronic device sealant.
- a homodisper type stirring mixer manufactured by PRIMIX Corporation
- Example 2 In the above formula (3-1), the compounding amount of the compound in which o is 1 (“X-22-163”, manufactured by Shin-Etsu Chemical Co., Ltd.) was changed to 50 parts by weight.
- a sealing agent for electronic devices was produced in the same manner as in Example 1 except that 50 parts by weight of 4,3 ′, 4′-diepoxybicyclohexane (“Celoxide 8000” manufactured by Daicel Corporation) was blended.
- Example 3 As another curable resin, 1,2-epoxy-4-vinylcyclohexane (Daicel) was used instead of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (Daicel, “Celoxide 8000”).
- a sealing agent for electronic devices was produced in the same manner as in Example 2 except that 50 parts by weight of “Celoxide 2000” manufactured by the company was blended.
- Example 4 As another curable resin, in place of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel, “Celoxide 8000”), 3-ethyl-3 (((3-ethyloxetane A sealing agent for an electronic device was prepared in the same manner as in Example 2 except that 50 parts by weight of -3-yl) methoxy) methyl) oxetane (manufactured by Toagosei Co., Ltd., “Aron Oxetane OXT-221”) was blended. .
- Example 5 As another curable resin, instead of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel, “Celoxide 8000”), 3-allyloxyoxetane (manufactured by Yokkaichi Chemical Co., Ltd., “ AL-OX ”)) was prepared in the same manner as in Example 2 except that 50 parts by weight was blended.
- Example 6 As another curable resin, instead of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel Corporation, “Celoxide 8000”), cyclohexanedimethanol divinyl ether (manufactured by Nippon Carbide Corporation, “ CHDVE ”) A sealing agent for electronic devices was produced in the same manner as in Example 2 except that 50 parts by weight was blended.
- CHDVE cyclohexanedimethanol divinyl ether
- Example 7 In place of 50 parts by weight of the compound represented by the above formula (1) in which o in the above formula (3-1) is 1 (“X-22-163” manufactured by Shin-Etsu Chemical Co., Ltd.), In the above formula (1), R 1 is a methyl group, X 1 and X 2 are methyl groups, X 3 is a group represented by the above formula (2-1) (R 2 is an ethylene group), m is 5, n A sealing agent for electronic devices was prepared in the same manner as in Example 2 except that 50 parts by weight of a compound having a compound No. 3 (“X-22-343” manufactured by Shin-Etsu Chemical Co., Ltd.) was blended.
- a compound having a compound No. 3 (“X-22-343” manufactured by Shin-Etsu Chemical Co., Ltd.
- Example 8 As another curable resin, in place of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel, “Celoxide 8000”), 3-ethyl-3 (((3-ethyloxetane A sealing agent for an electronic device was prepared in the same manner as in Example 7 except that 50 parts by weight of -3-yl) methoxy) methyl) oxetane (manufactured by Toagosei Co., Ltd., “Aron Oxetane OXT-221”) was blended. .
- Example 9 As the silicone compound represented by the above formula (1), instead of 100 parts by weight of the compound (“X-22-163” manufactured by Shin-Etsu Chemical Co., Ltd.) in which o in the above formula (3-1) is 1, An encapsulant for electronic devices was prepared in the same manner as in Example 1 except that 100 parts by weight of a compound having a p of 9 in the above formula (3-2) (“DMS-EC13” manufactured by Gelest Co.) was blended. Produced.
- Example 10 In the above formula (3-2), the compounding amount of the compound in which p is 9 (manufactured by Gelest, “DMS-EC13”) was changed to 50 parts by weight, and as other curable resins, 3, 4, 3 ′ , 4′-diepoxy bicyclohexane (“Celoxide 8000”, manufactured by Daicel Corporation) was blended in the same manner as in Example 9 except that 50 parts by weight was prepared.
- Example 11 As another curable resin, in place of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel, “Celoxide 8000”), 3-ethyl-3 (((3-ethyloxetane A sealing agent for an electronic device was prepared in the same manner as in Example 10 except that 50 parts by weight of -3-yl) methoxy) methyl) oxetane (manufactured by Toagosei Co., Ltd., “Aron Oxetane OXT-221”) was blended. .
- Example 12 Except that 1 part by weight of dimethylphenyl (4-methoxybenzyl) ammonium hexafluoroantimonate (manufactured by King Industries, "CXC-1612") was blended as a thermal cationic polymerization initiator instead of the photo cationic polymerization initiator Produced an encapsulant for electronic devices in the same manner as in Example 11.
- Example 13 In place of 50 parts by weight of the compound represented by the above formula (1) in which o in the above formula (3-1) is 1 (“X-22-163” manufactured by Shin-Etsu Chemical Co., Ltd.), A sealing agent for electronic devices was produced in the same manner as in Example 4 except that 50 parts by weight of the compound having q of 2 in the above formula (3-3) obtained in Production Example 1 was blended.
- R 1 in the above formula (1) is a methyl group
- X 1 and X 2 are groups represented by the above formula (2-4)
- R 2 is n- 50 parts by weight of a propylene group (R 5 is a methyl group)
- m is 1 and n is 0
- other curable resins are 1,6 -50 parts by weight of hexanediol diacrylate and 2 parts by weight of diphenyl (2,4,6-trimethoxybenzoyl) phosphine oxide (manufactured by BASF, "Lucirin TPO”) as a photo radical polymerization initiator
- a stirrer / mixer (“Homodisper L type", manufactured by Primix Co., Ltd.)
- Example 15 As a silicone compound represented by the above formula (1), 100 parts by weight of a compound having a p of 1 in the above formula (3-2) (manufactured by Gelest, “SIB1092.0”), and a photocationic polymerization initiator , 1 part by weight of tris (4- (4-acetylphenyl) thiophenyl) sulfonium tetrakis (pentafluorophenyl) borate (manufactured by BASF, “IRGACURE290”) is mixed with a homodisper-type stirring mixer (manufactured by Primics, “Homodisper L type "), and uniformly stirred and mixed at a stirring speed of 3000 rpm to produce an electronic device sealant.
- a homodisper-type stirring mixer manufactured by Primics, “Homodisper L type "
- Example 16 In the above formula (3-2), the compounding amount of the compound wherein p is 1 (manufactured by Gelest, “SIB1092.0”) was changed to 50 parts by weight, and other curable resins were 3, 4, 3 ′ , 4′-diepoxy bicyclohexane (“Celoxide 8000”, manufactured by Daicel Corporation) was blended in the same manner as in Example 15 except that 50 parts by weight of a sealing agent for electronic devices was prepared.
- SIB1092.0 the compounding amount of the compound wherein p is 1 (manufactured by Gelest, “SIB1092.0”) was changed to 50 parts by weight, and other curable resins were 3, 4, 3 ′ , 4′-diepoxy bicyclohexane (“Celoxide 8000”, manufactured by Daicel Corporation) was blended in the same manner as in Example 15 except that 50 parts by weight of a sealing agent for electronic devices was prepared.
- Example 17 In the above formula (3-2), the compounding amount of the compound in which p is 1 (manufactured by Gelest, “SIB1092.0”) was changed to 40 parts by weight, and 3,4,3 ′, 4′-diepoxy biphenyl was changed.
- the compounding amount of cyclohexane (manufactured by Daicel Corporation, “Celoxide 8000”) was changed to 30 parts by weight, and as another curable resin, 3-allyloxyoxetane (manufactured by Yokkaichi Chemical Co., Ltd., “AL-OX”) 20 wt.
- An electronic device sealant was produced in the same manner as in Example 16 except that the parts were blended.
- Example 18 As another curable resin, 1,2-epoxy-4-vinylcyclohexane (Daicel) was used instead of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (Daicel, “Celoxide 8000”).
- a sealing agent for electronic devices was produced in the same manner as in Example 16 except that 50 parts by weight of “Celoxide 2000” manufactured by the company was blended.
- Example 19 As another curable resin, in place of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel, “Celoxide 8000”), 3-ethyl-3 (((3-ethyloxetane A sealing agent for an electronic device was produced in the same manner as in Example 16 except that 50 parts by weight of -3-yl) methoxy) methyl) oxetane (manufactured by Toagosei Co., Ltd., “Aron oxetane OXT-221”) was blended. .
- Example 20 As another curable resin, instead of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel, “Celoxide 8000”), 3-allyloxyoxetane (manufactured by Yokkaichi Chemical Co., Ltd., “ AL-OX ”) was prepared in the same manner as in Example 16 except that 50 parts by weight of the compound was blended.
- Example 21 As another curable resin, instead of 50 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel Corporation, “Celoxide 8000”), cyclohexanedimethanol divinyl ether (manufactured by Nippon Carbide Corporation, “ CHDVE ”) was prepared in the same manner as in Example 16 except that 50 parts by weight was blended to prepare an electronic device sealant.
- CHDVE cyclohexanedimethanol divinyl ether
- Comparative Example 1 100 parts by weight of 3,4,3 ′, 4′-diepoxybicyclohexane (manufactured by Daicel Corporation, “Celoxide 8000”) is used as the other curable resin without blending the silicone compound represented by the above formula (1).
- An electronic device sealant was produced in the same manner as in Example 1 except that the above was blended.
- Example 2 A silicone compound represented by the above formula (1) is not blended, and 3-ethyl-3 (((3-ethyloxetane-3-yl) methoxy) methyl) oxetane (manufactured by Toagosei Co., Ltd.) is used as another curable resin. , “Aron Oxetane OXT-221”) was blended in the same manner as in Example 1 except that 100 parts by weight was blended.
- Example 4 The same as in Example 14 except that the silicone compound represented by the above formula (1) was not blended and the blending amount of 1,6-hexanediol diacrylate, which is another curable resin, was changed to 100 parts by weight. Thus, a sealing agent for electronic devices was produced.
- a cross-cut test with a cut interval of 1 mm was performed on the formed resin film in accordance with JIS K 5600-5-6.
- the peeling was 5% or less, “ ⁇ ”, when the peeling was more than 5% and 35% or less, “ ⁇ ”, and the peeling was more than 35% and 65% or less.
- the adhesiveness was evaluated as “ ⁇ ” for the case of “x” and “x” for the case where the peeling exceeded 65%.
- Weight change rate (%) ((W 2 ⁇ W 1 ) / W 1 ) ⁇ 100 When the rate of weight change is less than 1%, “ ⁇ ”, when it is 1% or more and less than 10%, “ ⁇ ”, when it is 10% or more and less than 20%, “ ⁇ ”, when it is 20% or more The case where there existed was evaluated as "x”, and the swelling property (device damage) of the adhesive piece was evaluated.
- a glass substrate (length 25 mm, width 25 mm, thickness 0.7 mm) on which an ITO electrode was formed to a thickness of 1000 mm was used as the substrate.
- the substrate was ultrasonically washed with acetone, an aqueous alkali solution, ion-exchanged water, and isopropyl alcohol for 15 minutes, respectively, then washed with boiled isopropyl alcohol for 10 minutes, and a UV-ozone cleaner (manufactured by Nippon Laser Electronics Co., Ltd.). The last treatment was performed with “NL-UV253”).
- this substrate is fixed to the substrate folder of the vacuum deposition apparatus, and 200 mg of N, N′-di (1-naphthyl) -N, N′-diphenylbenzidine ( ⁇ -NPD) is put into an unglazed crucible and other different types.
- 200 mg of tris (8-hydroxyquinoline) aluminum (Alq 3 ) was placed in an unglazed crucible, and the pressure in the vacuum chamber was reduced to 1 ⁇ 10 ⁇ 4 Pa. Thereafter, the crucible containing ⁇ -NPD was heated, and ⁇ -NPD was deposited on the substrate at a deposition rate of 15 s / s to form a 600 ⁇ ⁇ hole transport layer.
- the crucible containing Alq 3 was heated to form an organic light emitting material layer having a thickness of 600 ⁇ at a deposition rate of 15 ⁇ / s. Thereafter, the substrate on which the hole transport layer and the organic light emitting material layer are formed is transferred to another vacuum vapor deposition apparatus, and 200 mg of lithium fluoride is added to a tungsten resistance heating boat in the vacuum vapor deposition apparatus, and aluminum is added to another tungsten boat. 1.0 g of wire was added.
- the inside of the vapor deposition unit of the vacuum vapor deposition apparatus is depressurized to 2 ⁇ 10 ⁇ 4 Pa to form a lithium fluoride film with a thickness of 5 mm at a deposition rate of 0.2 kg / s, and then aluminum with a film thickness of 1000 mm at a rate of 20 kg / s did.
- the inside of the vapor deposition unit was returned to normal pressure with nitrogen, and the substrate on which the laminate having the organic light emitting material layer of 10 mm ⁇ 10 mm was arranged was taken out.
- a mask having an opening of 13 mm ⁇ 13 mm was placed so as to cover the entire laminated body of the substrate on which the obtained laminated body was arranged, and an inorganic material film A was formed by a plasma CVD method.
- SiH 4 gas and nitrogen gas are used as source gases, the flow rates of each are SiH 4 gas 10 sccm, nitrogen gas 200 sccm, RF power 10 W (frequency 2.45 GHz), chamber temperature 100 ° C., chamber The test was performed under the condition that the internal pressure was 0.9 Torr.
- the formed inorganic material film A had a thickness of about 1 ⁇ m.
- the sealing agent for electronic devices obtained by the Example and the comparative example was pattern-coated on the board
- the obtained organic EL display element is exposed for 100 hours in an environment of a temperature of 85 ° C. and a humidity of 85%, and then a voltage of 3 V is applied, and the light emission state of the organic EL display element (whether dark spots and pixel periphery quenching) Was visually observed.
- the organic EL display element is indicated as “ ⁇ ” when there is no dark spot or peripheral extinction, “ ⁇ ” when the dark spot or peripheral extinction is recognized, and “ ⁇ ” when the non-light emitting part is significantly enlarged. Display performance was evaluated.
- the sealing compound for electronic devices which can be apply
- the manufacturing method of an electronic device using this sealing agent for electronic devices can be provided.
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Abstract
Description
有機薄膜素子を封止する方法としては、従来、内部に吸水剤を設けた封止缶によって封止する方法が一般的であった。しかしながら、封止缶により封止する方法では、電子デバイスを薄型化することが困難となる。そこで、封止缶を使用しない有機薄膜素子の封止方法の開発が進められている。
有機層内への水分の浸入を防止するための方法として、特許文献2には、無機材料膜と樹脂膜とを交互に蒸着する方法が開示されており、特許文献3や特許文献4には、無機材料膜上に樹脂膜を形成する方法が開示されている。
以下に本発明を詳述する。
また、該特定の構造を有するシリコーン化合物は、表面張力が低いため、得られる電子デバイス用封止剤が濡れ広がり性に優れ、インクジェット法により容易に薄膜化することができるものとなる。
上記硬化性樹脂は、上記式(1)で表されるシリコーン化合物を含有する。上記式(1)で表されるシリコーン化合物を含有することにより、本発明の電子デバイス用封止剤は、インクジェット法による塗布に好適な粘度を有し、かつ、装置ダメージを低減することができる。
また、上記式(1)中、nの好ましい上限は10である。上記nが10以下であることにより、インクジェット塗布性及び低アウトガス性により優れるものとなり、かつ、硬化物がより好適な硬さを有するものとなる。上記nのより好ましい上限は5である。
ゴム材料等の膨潤防止性、インクジェット塗布性、低アウトガス性、及び、硬化物の柔軟性(硬さ)の観点から、式(3-1)中のo、式(3-2)中のp、及び、式(3-3)中のqは、それぞれ、1~6の整数であることが好ましい。
上記その他の硬化性樹脂としては、上記式(1)で表される構造を有さないエポキシ化合物(以下、「その他のエポキシ化合物」ともいう)、上記式(1)で表される構造を有さないオキセタン化合物(以下、「その他のオキセタン化合物」ともいう)、上記式(1)で表される構造を有さない(メタ)アクリル化合物(以下、「その他の(メタ)アクリル化合物」ともいう)、及び、ビニルエーテル化合物からなる群より選択される少なくとも1種が好ましい。
なお、本明細書において上記「(メタ)アクリル」とは、アクリル又はメタクリルを意味し、「(メタ)アクリル化合物」とは、(メタ)アクリロイル基を有する化合物を意味し、「(メタ)アクリロイル」とは、アクリロイル又はメタクリロイルを意味する。
上記脂環式エポキシ樹脂のうち市販されているものとしては、例えば、セロキサイド2000、セロキサイド2021P、セロキサイド2081、セロキサイド3000、セロキサイド8000、サイクロマーM-100(いずれもダイセル社製)、サンソサイザーEPS(新日本理化工業社製)等が挙げられる。
上記脂環式エポキシ樹脂のなかでも、エポキシ基に含まれる以外のエーテル結合、及び、エステル結合を有さないものはアウトガスの発生を抑制する観点から好適である。エポキシ基に含まれる以外のエーテル結合、及び、エステル結合を有さない脂環式エポキシ樹脂のうち市販されているものとしては、例えば、セロキサイド2000、セロキサイド3000、セロキサイド8000等が挙げられる。
これらのその他のエポキシ化合物は、単独で用いられてもよいし、2種以上が組み合わせて用いられてもよい。
これらのその他のオキセタン化合物は、単独で用いられてもよいし、2種以上が組み合わせて用いられてもよい。
これらのその他の(メタ)アクリル化合物は、単独で用いられてもよいし、2種以上が組み合わせて用いられてもよい。
なお、本明細書において上記「(メタ)アクリレート」とは、アクリレート又はメタクリレートを意味する。
これらのビニルエーテル化合物は、単独で用いられてもよいし、2種以上が組み合わせて用いられてもよい。
また、上記その他の硬化性樹脂は、含有しなくてもよいが、上記その他の硬化性樹脂を含有する場合、上記式(1)で表されるシリコーン化合物の含有量は、硬化性樹脂全体100重量部に対して、好ましい上限が90重量部である。上記式(1)で表されるシリコーン化合物の含有量が90重量部以下であることにより、上記その他の硬化性樹脂が接着性を向上させる等の効果をより発揮できる。
上記重合開始剤としては、光カチオン重合開始剤、熱カチオン重合開始剤、光ラジカル重合開始剤、熱ラジカル重合開始剤が好適に用いられる。
上記アゾ化合物としては、例えば、2,2’-アゾビス(2,4-ジメチルバレロニトリル)、アゾビスイソブチロニトリル等が挙げられる。
上記有機過酸化物としては、例えば、過酸化ベンゾイル、ケトンパーオキサイド、パーオキシケタール、ハイドロパーオキサイド、ジアルキルパーオキサイド、パーオキシエステル、ジアシルパーオキサイド、パーオキシジカーボネート等が挙げられる。
上記ヒドラジド化合物としては、例えば、1,3-ビス(ヒドラジノカルボノエチル-5-イソプロピルヒダントイン)、セバシン酸ジヒドラジド、イソフタル酸ジヒドラジド、アジピン酸ジヒドラジド、マロン酸ジヒドラジド等が挙げられる。
上記イミダゾール誘導体としては、例えば、1-シアノエチル-2-フェニルイミダゾール、N-(2-(2-メチル-1-イミダゾリル)エチル)尿素、2,4-ジアミノ-6-(2’-メチルイミダゾリル-(1’))-エチル-s-トリアジン、N,N’-ビス(2-メチル-1-イミダゾリルエチル)尿素、N,N’-(2-メチル-1-イミダゾリルエチル)-アジポアミド、2-フェニル-4-メチル-5-ヒドロキシメチルイミダゾール、2-フェニル-4,5-ジヒドロキシメチルイミダゾール等が挙げられる。
上記酸無水物としては、例えば、テトラヒドロ無水フタル酸、エチレングリコールビス(アンヒドロトリメリテート)等が挙げられる。
これらの熱硬化剤は、単独で用いられてもよいし、2種以上が組み合わせて用いられてもよい。
上記ポリエーテル化合物としては、例えば、ポリエチレングリコール、ポリプロピレングリコール、ポリテトラメチレングリコール、クラウンエーテル化合物等が挙げられる。なかでも、クラウンエーテル化合物が好適である。
上記表面改質剤としては、例えば、界面活性剤やレベリング剤等が挙げられる。
上記界面活性剤や上記レベリング剤のうち市販されているものとしては、例えば、BYK-340、BYK-345(いずれもビックケミー・ジャパン社製)、サーフロンS-611(AGCセイミケミカル社製)等が挙げられる。
なお、インクジェットによる塗布時に本発明の電子デバイス用封止剤を加熱し、粘度を低減して塗布しても良い。
上記全光線透過率は、例えば、AUTOMATIC HAZE MATER MODEL TC=III DPK(東京電色社製)等の分光計を用いて測定することができる。
上記紫外線を照射する光源としては、例えば、キセノンランプ、カーボンアークランプ等、従来公知の光源を用いることができる。
上記含水率の測定方法としては、例えば、JIS K 7251に準拠してカールフィッシャー法により求める方法や、JIS K 7209-2に準拠して吸水後の重量増分を求める等の方法が挙げられる。
インクジェット法により、本発明の電子デバイス用封止剤を2枚の基材のうち少なくとも一方に塗布する工程と、塗布した電子デバイス用封止剤を光照射及び/又は加熱により硬化させる工程と、上記2枚の基材を貼り合わせる工程とを有する電子デバイスの製造方法もまた、本発明の1つである。
上記一方の基材が上記積層体の形成されていない基材である場合、他方の基材を貼り合わせた際に、上記積層体を外気から保護できるように上記一方の基材に本発明の電子デバイス用封止剤を塗布すればよい。即ち、他方の基材を貼り合わせた際に上記積層体の位置となる場所に全面的に塗布するか、又は、他方の基材を貼り合わせた際に上記積層体の位置となる場所が完全に収まる形状に、閉じたパターンの封止剤部を形成してもよい。
上記無機材料膜を構成する無機材料としては、従来公知のものを用いることができ、例えば、窒化珪素(SiNx)や酸化珪素(SiOx)等が挙げられる。上記無機材料膜は、1層からなるものであってもよく、複数種の層を積層したものであってもよい。また、上記無機材料膜と本発明の電子デバイス用封止剤からなる樹脂膜とを、交互に繰り返して上記積層体を被覆してもよい。
上記電子デバイス用封止剤を光照射及び/又は加熱により硬化させる工程を、上記2枚の基材を貼り合わせる工程の前に行なう場合、本発明の電子デバイス用封止剤は、光照射及び/又は加熱してから硬化反応が進行して接着ができなくなるまでの可使時間が1分以上であることが好ましい。上記可使時間が1分以上であることにより、2枚の基材を貼り合わせる前の硬化の進行を抑制し、貼り合わせた後の接着強度をより高くすることができる。
これらの光源は、上記光カチオン重合開始剤や上記光ラジカル重合開始剤の吸収波長に合わせて適宜選択される。
上記減圧雰囲気下の真空度の好ましい下限は0.01kPa、好ましい上限は10kPaである。上記減圧雰囲気下の真空度がこの範囲であることにより、真空装置の気密性や真空ポンプの能力から真空状態を達成するのに長い時間を費やすことなく、2枚の基材を貼り合わせる際の本発明の電子デバイス用封止剤中からより効率的に気泡を除去できる。
滴下漏斗、撹拌機、温度計、及び、セプタムを備えた四口フラスコにトルエン20mLを加えた。また、滴下漏斗に3-(アリルオキシ)オキセタン45.7g(0.4mol)と、水素末端トリジメチルシロキサン(Gelest社製、「DMS-03H」)76g(0.15mol)との混合溶液を入れ、滴下漏斗から該混合溶液3mLをフラスコ内のトルエンに滴下し、フラスコ内の温度を80℃に昇温させた。
次いで、注射器を用いてセプタムから触媒としての塩化白金酸六水和物(H2PtCl6・6H2O)のベンゾニトリル溶液(塩化白金酸濃度:0.1重量%)800μLをフラスコ内に添加した。その後、3-(アリルオキシ)オキセタンと水素末端トリジメチルシロキサンとの混合液を滴下漏斗から40分かけて更に滴下した。滴下終了後、フラスコ内を80℃~85℃で2時間加熱することにより、3-(アリルオキシ)オキセタンと水素末端トリジメチルシロキサンとを反応させた。反応終了後に、減圧蒸留によりトルエン等の揮発性化合物を除去した。このようにして、純度95%の上記式(3-3)中のqが2である化合物を得た。
上記式(1)で表されるシリコーン化合物として、上記式(3-1)中のoが1である化合物(信越化学工業社製、「X-22-163」)100重量部と、光カチオン重合開始剤として、トリス(4-(4-アセチルフェニル)チオフェニル)スルホニウムテトラキス(ペンタフルオロフェニル)ボレート(BASF社製、「IRGACURE290」)1重量部とを、ホモディスパー型撹拌混合機(プライミクス社製、「ホモディスパーL型」)を用い、撹拌速度3000rpmで均一に撹拌混合して、電子デバイス用封止剤を作製した。
上記式(3-1)中のoが1である化合物(信越化学工業社製、「X-22-163」)の配合量を50重量部に変更し、その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部を配合したこと以外は、実施例1と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、1,2-エポキシ-4-ビニルシクロヘキサン(ダイセル社製、「セロキサイド2000」)50重量部を配合したこと以外は、実施例2と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亞合成社製、「アロンオキセタンOXT-221」)50重量部を配合したこと以外は、実施例2と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、3-アリルオキシオキセタン(四日市合成社製、「AL-OX」)50重量部を配合したこと以外は、実施例2と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、シクロヘキサンジメタノールジビニルエーテル(日本カーバイド社製、「CHDVE」)50重量部を配合したこと以外は、実施例2と同様にして電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物として、上記式(3-1)中のoが1である化合物(信越化学工業社製、「X-22-163」)50重量部に代えて、上記式(1)中のR1がメチル基、X1及びX2がメチル基、X3が上記式(2-1)で表される基(R2がエチレン基)、mが5、nが3である化合物(信越化学工業社製、「X-22-343」)50重量部を配合したこと以外は、実施例2と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亞合成社製、「アロンオキセタンOXT-221」)50重量部を配合したこと以外は、実施例7と同様にして電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物として、上記式(3-1)中のoが1である化合物(信越化学工業社製、「X-22-163」)100重量部に代えて、上記式(3-2)中のpが9である化合物(Gelest社製、「DMS-EC13」)100重量部を配合したこと以外は、実施例1と同様にして電子デバイス用封止剤を作製した。
上記式(3-2)中のpが9である化合物(Gelest社製、「DMS-EC13」)の配合量を50重量部に変更し、その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部を配合したこと以外は、実施例9と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亞合成社製、「アロンオキセタンOXT-221」)50重量部を配合したこと以外は、実施例10と同様にして電子デバイス用封止剤を作製した。
光カチオン重合開始剤に代えて、熱カチオン重合開始剤として、ジメチルフェニル(4-メトキシベンジル)アンモニウムヘキサフルオロアンチモネート(King Industries社製、「CXC-1612」)、1重量部を配合したこと以外は、実施例11と同様にして電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物として、上記式(3-1)中のoが1である化合物(信越化学工業社製、「X-22-163」)50重量部に代えて、製造例1で得られた上記式(3-3)中のqが2である化合物50重量部を配合したこと以外は、実施例4と同様にして電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物として、上記式(1)中のR1がメチル基、X1及びX2が上記式(2-4)で表される基(R2がn-プロピレン基、R5がメチル基)、mが1、nが0である化合物(信越化学工業社製、「X-22-164」)50重量部と、その他の硬化性樹脂として、1,6-ヘキサンジオールジアクリレート50重量部と、光ラジカル重合開始剤として、ジフェニル(2,4,6-トリメトキシベンゾイル)ホスフィンオキシド(BASF社製、「ルシリンTPO」)2重量部とを、ホモディスパー型撹拌混合機(プライミクス社製、「ホモディスパーL型」)を用い、撹拌速度3000rpmで均一に撹拌混合して、電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物として、上記式(3-2)中のpが1である化合物(Gelest社製、「SIB1092.0」)100重量部と、光カチオン重合開始剤として、トリス(4-(4-アセチルフェニル)チオフェニル)スルホニウムテトラキス(ペンタフルオロフェニル)ボレート(BASF社製、「IRGACURE290」)1重量部とを、ホモディスパー型撹拌混合機(プライミクス社製、「ホモディスパーL型」)を用い、撹拌速度3000rpmで均一に撹拌混合して、電子デバイス用封止剤を作製した。
上記式(3-2)中のpが1である化合物(Gelest社製、「SIB1092.0」)の配合量を50重量部に変更し、その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部を配合したこと以外は、実施例15と同様にして電子デバイス用封止剤を作製した。
上記式(3-2)中のpが1である化合物(Gelest社製、「SIB1092.0」)の配合量を40重量部に変更し、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)の配合量を30重量部に変更し、その他の硬化性樹脂として、更に、3-アリルオキシオキセタン(四日市合成社製、「AL-OX」)20重量部を配合したこと以外は、実施例16と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、1,2-エポキシ-4-ビニルシクロヘキサン(ダイセル社製、「セロキサイド2000」)50重量部を配合したこと以外は、実施例16と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亞合成社製、「アロンオキセタンOXT-221」)50重量部を配合したこと以外は、実施例16と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、3-アリルオキシオキセタン(四日市合成社製、「AL-OX」)50重量部を配合したこと以外は、実施例16と同様にして電子デバイス用封止剤を作製した。
その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)50重量部に代えて、シクロヘキサンジメタノールジビニルエーテル(日本カーバイド社製、「CHDVE」)50重量部を配合したこと以外は、実施例16と同様にして電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物を配合せず、その他の硬化性樹脂として、3,4,3’,4’-ジエポキシビシクロヘキサン(ダイセル社製、「セロキサイド8000」)100重量部を配合したこと以外は、実施例1と同様にして電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物を配合せず、その他の硬化性樹脂として、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亞合成社製、「アロンオキセタンOXT-221」)100重量部を配合したこと以外は、実施例1と同様にして電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物を配合せず、その他の硬化性樹脂である3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亞合成社製、「アロンオキセタンOXT-221」)の配合量を100重量部に変更したこと以外は、実施例12と同様にして電子デバイス用封止剤を作製した。
上記式(1)で表されるシリコーン化合物を配合せず、その他の硬化性樹脂である1,6-ヘキサンジオールジアクリレートの配合量を100重量部に変更したこと以外は、実施例14と同様にして電子デバイス用封止剤を作製した。
実施例及び比較例で得られた各電子デバイス用封止剤について以下の評価を行った。結果を表1、2に示した。
実施例及び比較例で得られた各電子デバイス用封止剤について、E型粘度計(東機産業社製、「VISCOMETER TV-22」)を用いて、25℃、100rpmの条件における粘度を測定した。
実施例及び比較例で得られた各電子デバイス用封止剤を、インクジェット吐出装置(マイクロジェット社製、「NanoPrinter300」)を用いて、80ピコリットルの液滴量にてアルカリ洗浄した無アルカリガラス(旭硝子社製、「AN100」)上に印刷し、10分後に無アルカリガラス上の液滴の直径を測定した。
実施例及び比較例で得られた各電子デバイス用封止剤を、スピンコーターを用いて、無アルカリガラス(旭硝子社製、「AN100」)上に10μmの厚みに塗布し、その後、実施例1~11、13~21、及び、比較例1、2、4で得られた各電子デバイス用封止剤については、LEDランプを用いて波長365nmの紫外線を3000mJ/cm2照射して、実施例12、比較例3で得られた電子デバイス用封止剤については、100℃で30分間加熱して、電子デバイス用封止剤を硬化させ、樹脂膜を得た。
形成した樹脂膜に対しJIS K 5600-5-6に従い、切込み間隔1mmのクロスカット試験を行った。
クロスカット試験を行った際の、剥がれが5%以下であった場合を「◎」、剥がれが5%を超え35%以下であった場合を「○」、剥がれが35%を超え65%以下であった場合を「△」、剥がれが65%を超えた場合を「×」として接着性を評価した。
エポキシ系接着剤(ニチバン社製、「アラルダイトAR-S30」)約0.15gを硬化させて接着剤片を作製し重量(W1)を測定した。その後、実施例及び比較例で得られた各電子デバイス用封止剤を褐色スクリュー管に入れ、作製した接着剤片を浸漬して蓋をし、60℃で7日間静置した後、接着剤片を取り出し、表面をウエスで拭き取った後、重量(W2)を測定し、下記式により接着剤片の重量変化率を算出した。
重量変化率(%)=((W2-W1)/W1)×100
重量変化率が1%未満であった場合を「◎」、1%以上10%未満であった場合を「○」、10%以上20%未満であった場合を「△」、20%以上であった場合を「×」として接着剤片の膨潤性(装置ダメージ)を評価した。
(有機発光材料層を有する積層体が配置された基板の作製)
ガラス基板(長さ25mm、幅25mm、厚さ0.7mm)にITO電極を1000Åの厚さで成膜したものを基板とした。上記基板をアセトン、アルカリ水溶液、イオン交換水、イソプロピルアルコールにてそれぞれ15分間超音波洗浄した後、煮沸させたイソプロピルアルコールにて10分間洗浄し、更に、UV-オゾンクリーナ(日本レーザー電子社製、「NL-UV253」)にて直前処理を行った。
次に、この基板を真空蒸着装置の基板フォルダに固定し、素焼きの坩堝にN,N’-ジ(1-ナフチル)-N,N’-ジフェニルベンジジン(α-NPD)を200mg、他の異なる素焼き坩堝にトリス(8-ヒドロキシキノリン)アルミニウム(Alq3)を200mg入れ、真空チャンバー内を、1×10-4Paまで減圧した。その後、α-NPDの入った坩堝を加熱し、α-NPDを蒸着速度15Å/sで基板に堆積させ、膜厚600Åの正孔輸送層を成膜した。次いで、Alq3の入った坩堝を加熱し、15Å/sの蒸着速度で膜厚600Åの有機発光材料層を成膜した。その後、正孔輸送層及び有機発光材料層が形成された基板を別の真空蒸着装置に移し、この真空蒸着装置内のタングステン製抵抗加熱ボートにフッ化リチウム200mgを、別のタングステン製ボートにアルミニウム線1.0gを入れた。その後、真空蒸着装置の蒸着器内を2×10-4Paまで減圧してフッ化リチウムを0.2Å/sの蒸着速度で5Å成膜した後、アルミニウムを20Å/sの速度で1000Å成膜した。窒素により蒸着器内を常圧に戻し、10mm×10mmの有機発光材料層を有する積層体が配置された基板を取り出した。
得られた積層体が配置された基板の、該積層体全体を覆うように、13mm×13mmの開口部を有するマスクを設置し、プラズマCVD法にて無機材料膜Aを形成した。
プラズマCVD法は、原料ガスとしてSiH4ガス及び窒素ガスを用い、各々の流量をSiH4ガス10sccm、窒素ガス200sccmとし、RFパワーを10W(周波数2.45GHz)、チャンバー内温度を100℃、チャンバー内圧力を0.9Torrとする条件で行った。
形成された無機材料膜Aの厚さは、約1μmであった。
得られた基板に対し、実施例及び比較例で得られた各電子デバイス用封止剤を、インクジェット吐出装置(マイクロジェット社製、「NanoPrinter300」)を使用して基板にパターン塗布した。
その後、実施例1~11、13~21、及び、比較例1、2、4で得られた各電子デバイス用封止剤については、LEDランプを用いて波長365nmの紫外線を3000mJ/cm2照射して、実施例12、比較例3で得られた電子デバイス用封止剤については、100℃で30分間加熱して、電子デバイス用封止剤を硬化させて樹脂保護膜を形成した。
樹脂保護膜を形成した後、該樹脂保護膜の全体を覆うように、12mm×12mmの開口部を有するマスクを設置し、プラズマCVD法にて無機材料膜Bを形成して有機EL表示素子を得た。
プラズマCVD法は、上記「(無機材料膜Aによる被覆)」と同様の条件で行った。
形成された無機材料膜Bの厚さは、約1μmであった。
得られた有機EL表示素子を、温度85℃、湿度85%の環境下で100時間暴露した後、3Vの電圧を印加し、有機EL表示素子の発光状態(ダークスポット及び画素周辺消光の有無)を目視で観察した。ダークスポットや周辺消光が無く均一に発光した場合を「○」、ダークスポットや周辺消光が認められた場合を「△」、非発光部が著しく拡大した場合を「×」として有機EL表示素子の表示性能を評価した。
Claims (7)
- 硬化性樹脂と、重合開始剤及び/又は熱硬化剤とを含有し、インクジェット法による塗布に用いられる電子デバイス用封止剤であって、
前記硬化性樹脂は、下記式(1)で表されるシリコーン化合物を含有する
ことを特徴とする電子デバイス用封止剤。
- 式(1)で表されるシリコーン化合物は、式(1)中のX1、X2、及び、X3のうち少なくともいずれかが式(2-1)、(2-2)、又は、(2-3)で表される基である化合物であることを特徴とする請求項1記載の電子デバイス用封止剤。
- 硬化性樹脂は、式(1)で表されるシリコーン化合物に加えて、その他の硬化性樹脂として、式(1)で表される構造を有さないエポキシ化合物、式(1)で表される構造を有さないオキセタン化合物、式(1)で表される構造を有さない(メタ)アクリル化合物、及び、ビニルエーテル化合物からなる群より選択される少なくとも1種を含有することを特徴とする請求項1、2又は3記載の電子デバイス用封止剤。
- 硬化性樹脂は、その他の硬化性樹脂として、脂環式エポキシ樹脂、3-(アリルオキシ)オキセタン、3-エチル-3-((2-エチルヘキシルオキシ)メチル)オキセタン、及び、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタンからなる群より選択される少なくとも1種を含有することを特徴とする請求項4記載の電子デバイス用封止剤。
- E型粘度計を用いて、25℃、100rpmの条件で測定した粘度が5~200mPa・sであることを特徴とする請求項1、2、3、4又は5記載の電子デバイス用封止剤。
- インクジェット法により、請求項1、2、3、4、5又は6記載の電子デバイス用封止剤を2枚の基材のうち少なくとも一方に塗布する工程と、
塗布した電子デバイス用封止剤を光照射及び/又は加熱により硬化させる工程と、
前記2枚の基材を貼り合わせる工程とを有する
ことを特徴とする電子デバイスの製造方法。
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