WO2014098036A1 - 導電性ペースト - Google Patents
導電性ペースト Download PDFInfo
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- WO2014098036A1 WO2014098036A1 PCT/JP2013/083638 JP2013083638W WO2014098036A1 WO 2014098036 A1 WO2014098036 A1 WO 2014098036A1 JP 2013083638 W JP2013083638 W JP 2013083638W WO 2014098036 A1 WO2014098036 A1 WO 2014098036A1
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- 0 **c1c(*)c(*)c(*)c(*)c1* Chemical compound **c1c(*)c(*)c(*)c(*)c1* 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
- H05K1/092—Dispersed materials, e.g. conductive pastes or inks
Definitions
- the present invention relates to a conductive paste.
- the conductive paste is a material used for forming, for example, a linear fine electrode or a dot-like microelectrode on a printed circuit board, and a silver paste is conventionally used because of its high conductivity.
- the coating film obtained from the conductive silver paste tends to cause ion migration. Above all, silver particles are very expensive. Therefore, the conductive paste using inexpensive copper particles has begun to be used in the industry.
- the conductive paste using copper particles is a composition obtained by kneading copper particles, a resin binder, and an organic solvent with a kneader, three rolls, or the like. And after apply
- circuits and electrodes obtained from conductive copper paste tend to increase in volume resistivity over time and do not exhibit long-term conductivity. This is because copper particles are easily oxidized and a thick oxide film is formed on the surface thereof.
- Patent Document 1 proposes a method of adding a reducing agent such as alkylbenzoic acid, hydroquinone, and aminophenol as an additive to the conductive copper paste. The effect has not yet satisfied the high standards required by industry.
- the temperature is lower than the thermal decomposition temperature of copper formate itself, and the resin can be used as a base material.
- Patent Document 2 A technique for obtaining a copper film at a temperature of ⁇ 140 ° C. is disclosed (Patent Document 2).
- the present invention greatly contributes to the provision of a conductive paste capable of forming an electrode having excellent conductivity stability over time and / or having excellent printing characteristics by solving at least one technical problem described above. obtain.
- the conductive paste can solve at least a part of the above-mentioned problems by containing three specific materials.
- One conductive paste of the present invention contains (A) fine metal particles, (B) a resin binder, and (C) an organic solvent, and (D1) an organic monocarboxylic acid metal salt, D2) a diketone chelating agent and (D3) an aromatic compound represented by the following general formula (Chemical Formula 1).
- R 1 , R 2 , R 3 , R 4 and R 5 all represent hydrogen, a hydroxyl group, an alkyl group, a carboxy group or an amino group, and n is 0 or 1 When n is 1, A represents an alkylene group, and X represents a carboxyl group or a formyl group.
- the oxide film formed on the surface of the component (A) is reduced by the reducing action of the organic monocarboxylic acid derived from the component (D1) generated as a result of the ligand exchange reaction. As a result, it is considered that the conductivity inherent to the component (A) is restored.
- the metal complex of component (D2) generated as a result of the above-described ligand exchange reaction is decomposed under heating. As a result, the fine particles derived from the released component (D1), in other words, the metal particles generated by the ligand exchange reaction between the component (D1) and the component (D2) are converted into the component (A). It precipitates on the surface and in the continuous phase.
- particles (metal particles) generated from a metal that is a part of the component (D1) cover part or all of the surface of the component (A).
- the metal particles do not have an oxide film on the surface, they themselves have excellent conductivity. Therefore, according to this conductive paste, a coating film having a small decrease in volume resistivity over time can be obtained not only at room temperature but also at a high temperature (hereinafter, “the decrease in volume resistivity over time is small. "The change in conductivity over time is small” is simply referred to as “conductive stability over time”).
- this conductive paste has good screen printing suitability, fine wiring and fine electrodes can be formed.
- this electroconductive paste what can be provided with the temporal electroconductive stability of a silver paste with the temporal electroconductive stability is also obtained.
- one conductive paste of the present invention it is possible to obtain a coating film having a small decrease in volume resistivity over time not only at room temperature but also at high temperature.
- the conductive paste since the conductive paste has good screen printing suitability, fine wirings and fine electrodes can be formed.
- (A) component, (B) component, (C) component, (D1) component, (D2) component, and (D3) component are mixed by a well-known means (for example, kneading processes, such as a three-roll). Thereby, the conductive paste of this embodiment is manufactured.
- a well-known means for example, kneading processes, such as a three-roll.
- the conductive paste of this embodiment is manufactured.
- the above (D1), (D2), and (D3) are employed as additives.
- copper particles are typically employed as the component (A).
- the component (A) of this embodiment is copper particles, but this embodiment is not limited to copper particles.
- the component (A) of the present embodiment includes at least one of copper, cobalt, iron, zinc, aluminum, titanium, vanadium, manganese, zirconium, molybdenum, indium, bismuth, antimony, tungsten, and the aforementioned metals.
- the fine particles are composed of at least one selected from the group consisting of the alloys to be contained, the effects of the present embodiment can be equivalent to or at least partially effective.
- the average primary particle diameter of the component (A) is not particularly limited, but from the viewpoint of the temporal conductivity stability and the screen printing suitability, it is a preferred embodiment that it is about 0.05 ⁇ m or more and 50 ⁇ m or less. Moreover, it is a more preferable aspect that it is about 0.05 micrometer or more and 30 micrometers or less.
- the average primary particle size is a value measured by a laser diffraction / scattering method.
- fine particles having a true spherical shape, a substantially spherical shape, a flat shape, or a dendritic shape can be adopted as a representative example. However, from the viewpoint of the temporal conductivity stability, the dendritic component (A) is particularly preferable.
- the type of copper particles employed as the component (A) of the present embodiment is not particularly limited. Can use various known copper particles as the component (A) without any particular limitation.
- the copper particles also include copper alloy particles. Typical examples of metals other than copper constituting the copper alloy include cobalt, iron, zinc, aluminum, titanium, vanadium, manganese, zirconium, molybdenum, indium, bismuth, antimony, tungsten, and the like.
- An example of the component (B) in the present embodiment is a resin binder that can be used for a conductive paste.
- Various known thermosetting resins or thermoplastic resins can be used as the component (B).
- Specific preferred examples of the component (B) are at least one selected from the group consisting of phenol resins, polyester resins, epoxy resins, polyurethane resins, and acrylic resins.
- a typical example of the above-mentioned phenol resin is a novolac type phenol resin or a resol type phenol resin.
- the above-mentioned phenol resin is not particularly limited.
- Typical examples of phenols that are used as raw materials are carboxylic acid, cresol, amylphenol, bisphenol A, butylphenol, octylphenol, nonylphenol, dodecylphenol, and the like.
- Typical examples of formaldehydes are formalin and paraformaldehyde.
- polyester resin is a product obtained by reacting an acid component and a glycol component.
- representative examples of the acid component include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, orthophthalic acid, and 2,6-naphthalenedicarboxylic acid, or Aliphatic dicarboxylic acids such as succinic acid, adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, or Alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, hexahydrophthalic anhydride, 1,1′-bicyclohexane-4,4′-dicarboxylic acid, 2,6-decalin dicarboxylic acid, or And trivalent or higher polycarboxylic acids such as trimellitic anhydride and pyromellitic anhydride.
- aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, orthophthalic acid, and 2,6-naphthalenedicarboxylic acid
- glycol component examples include ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 1,3 -Aliphatic diols such as butanediol, neopentyl glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, dipropylene glycol, or Alicyclic diols such as 1,4-cyclohexanedimethanol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, hydrogenated bisphenol A, hydrogenated bisphenol F, or Trivalent or higher polyols such as glycerin, trimethylolpropane, trimethylolethane, diglycerin, triglycerin, 1,2,6-hexanetriol, pentaery
- the physical property of the above-mentioned polyester resin is not particularly limited.
- the hydroxyl value is about 3 KOHmg / g or more and 200 KOHmg / g or less
- the acid value is about 0.1 KOHmg / g or more and 50 KOHmg / g or less.
- epoxy resins include bisphenol-type epoxy resins, hydrogenated products of bisphenol-type epoxy resins, or novolac-type epoxy resins obtained by reacting phenol novolak resins or cresol novolak resins with haloepoxides, biphenyl types.
- bisphenols are bisphenol A, bisphenol F, bisphenol AD, bisphenol S, tetramethyl bisphenol A, tetramethyl bisphenol F, tetramethyl bisphenol AD, tetramethyl bisphenol S, tetrabromobisphenol A, Tetrachlorobisphenol A, tetrafluorobisphenol A and the like.
- amines include toluidines, xylidines, cumidine (isopropylaniline) s, hexylanilines, nonylanilines, dodecylanilines and the like, or Cycloaliphatic amines such as cyclopentylamines, cyclohexylamines, norbornylamines, or Methylamine, ethylamine, propylamine, butylamine, hexylamine, octylamine, decylamine, dodecylamine, stearylamine, icosylamine, 2-ethylhexylamine, dimethylamine, diethylamine, dipropylamine, dibutylamine, dipentylamine, diheptylamine, etc.
- Cycloaliphatic amines such as cyclopentylamines, cyclohexylamines, norbornylamines, or Methylamine, ethylamine
- Aliphatic amines such as diethanolamine, diisopropanolamine, di-2-hydroxybutylamine, N-methylethanolamine, N-ethylethanolamine, N-benzylethanolamine, and the like.
- polyisocyanates include 1,5-naphthylene diisocyanate, 4,4′-diphenylmethane diisocyanate, tolylene diisocyanate, butane-1,4-diisocyanate, hexamethylene diisocyanate, 2,2,4 -Various aliphatic, alicyclic or aromatic diisocyanates such as trimethylhexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate.
- a representative example of the above-mentioned epoxy resin is selected from the group consisting of those derived from the above-mentioned bisphenols and epichlorohydrin (so-called phenoxy resin), amine-modified epoxy resins, and amine-urethane-modified epoxy resins. It is preferable that it is a seed
- a typical example of the above-mentioned polyurethane resin is a polymer polyol, polyisocyanate, and, if necessary, a poly (urea) urethane resin using an amine as a raw material.
- the polymer polyol include the polyester resin having a hydroxyl group at the end (polyester polyol), polycarbonate polyol, and polyether polyol.
- polyisocyanates include butane-1,4-diisocyanate, 1,6-hexamethylene diisocyanate, lysine diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, 2,4,4-trimethyl.
- amines are diamines such as ethylenediamine, propylenediamine, hexamethylenediamine, isophoronediamine, dicyclohexylmethane-4,4′-diamine, or n-butylamine, mono-n-butylamine, diethanolamine.
- diamines such as ethylenediamine, propylenediamine, hexamethylenediamine, isophoronediamine, dicyclohexylmethane-4,4′-diamine, or n-butylamine, mono-n-butylamine, diethanolamine.
- monoamines such as monoethanolamine, and alkanolamines such as monoethanolamine and diethanolamine.
- a typical example of the above-mentioned polyurethane resin is that an isocyanate group-terminated urethane prepolymer obtained by reacting the above-described polymer polyol and the above-mentioned polyisocyanate is chain-extended and / or chain-stopped with the above-mentioned amine. Can be used.
- a typical example of the above-mentioned acrylic resin is obtained by copolymerizing various acrylic monomers.
- the monomer include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, lauryl (meth) acrylate, and (meth) acrylic.
- resin binder with the above-mentioned (B) component.
- resin binders include polyethylene resin, polypropylene resin, polyvinyl chloride resin, polystyrene resin, polyvinyl acetate, polytetrafluoroethylene resin, ABS resin, AS resin, polyamide resin, polyvinyl acetal resin, Polycarbonate resin, modified polyphenylene ether resin, polyethylene terephthalate resin, polybutylene terephthalate resin, cyclic polyolefin resin, polyphenylene sulfide resin, polysulfone resin, polyethersulfone resin, amorphous polyarylate resin, liquid crystal polymer resin, polyetheretherketone resin, And at least one selected from the group of polyamideimide resins and the like.
- the usage-amount of the above-mentioned (B) component is not specifically limited.
- the amount of the component (B) is preferably about 1 part by mass to 30 parts by mass with respect to 100 parts by mass of the component (A).
- the aforementioned range is more preferably about 5 parts by mass or more and 25 parts by mass or less, and particularly preferably about 10 parts by mass or more and 20 parts by mass or less.
- component (C) is an organic solvent that can be used for the conductive paste.
- Various known organic solvents can be used without particular limitation.
- Typical examples of component (C) are ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-propyl ether, ethylene glycol mono-i-propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol monomethyl Ether, diethylene glycol monoethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, propylene glycol monomethyl ether, diethyl ether, ethylene glycol dimethyl ether, ethylene glycol methyl ethyl ether, ethylene glycol ethyl ether acetate, diethylene glycol dimethyl ether , Diethylene Recall diethyl ether, diethylene glycol monomethyl ether, Diethylene Recall
- the group consisting of the aforementioned ether alcohol, the aforementioned non-ether alcohol, the aforementioned ester solvent, the aforementioned ketone solvent, the aforementioned aliphatic solvent, the aforementioned aromatic solvent, and the aforementioned plant solvent. It is one aspect that can be adopted in the present embodiment that it is at least one selected from the above. However, among these, the ether-based alcohols are preferable from the viewpoint of the temporal conductivity stability and / or screen printing suitability.
- the amount of the above component (C) used is not particularly limited. However, in terms of handling properties, screen printing suitability, and / or conductive stability over time, the amount of the component (C) is about 1 part by mass to 30 parts by mass with respect to 100 parts by mass of the component (A). Preferably there is. From the same viewpoint, the aforementioned range is more preferably about 3 parts by mass or more and 20 parts by mass or less, and particularly preferably about 5 parts by mass or more and 15 parts by mass or less.
- the component (D1), the component (D2), and the component (D3) are blended as a part of the constituent material of the conductive paste.
- desired electrical stability over time and / or screen printing suitability is achieved by the interaction of the component (D1), the component (D2), and the component (D3).
- a metal complex of the component (D2) can be produced by a ligand exchange reaction between the component (D1) and the component (D2). This is because the metal ion of the organic monocarboxylic acid metal salt that is the component (D1) that is an ion pair consisting of an organic monocarboxylic acid ion and a metal ion forms a complex with the component (D2) that is a bidentate ligand This is because it can exist more stably from the viewpoint of the entropy effect.
- the oxide film formed on the surface of the component (A) is reduced by the reducing action of the organic monocarboxylic acid derived from the component (D1) generated as a result of the ligand exchange reaction. As a result, it is considered that the conductivity inherent to the component (A) is restored.
- the metal complex of the component (D2) generated as a result of the above-described ligand exchange reaction is decomposed under heating, the metal ion derived from the released component (D1) (in this embodiment, Copper ions) are deposited as fine particles on the surface of component (A) or in the continuous phase.
- generated through the ligand exchange reaction of (D1) component and (D2) component will precipitate a metal particle by thermal decomposition.
- the metal particles are considered to cover part or all of the surface of the component (A).
- FIG. 1 is an electron micrograph showing that the metal ions are considered to be precipitated as fine particles (X in FIG. 1) on the surface of component (A) (Y in FIG. 1) or in the continuous phase. is there. In addition, since this metal particle does not have an oxide film on the surface, itself has excellent conductivity.
- this conductive paste is excellent in the temporal conductivity stability not only at room temperature but also at high temperatures.
- this conductive paste was confirmed to have good screen printing suitability, fine wiring and fine electrodes can be formed.
- (D1) component, (D2) component, and (D3) component play together the effect which (D1) component, (D2) component, and (D3) component cannot each show
- the component (D1) is not particularly limited as long as it is a metal salt of an organic monocarboxylic acid.
- a typical example of the organic monocarboxylic acid is one selected from the group consisting of formic acid, oxalic acid, salicylic acid, benzoic acid, hydroxyacetic acid, and glyoxylic acid.
- a typical example of the metal is one selected from the group consisting of copper, silver, palladium, and platinum.
- the component (D1) is not particularly limited.
- Suitable examples of component D1) are copper formate and / or copper oxalate.
- the amount of component (D1) used is not particularly limited. However, from the viewpoint of the temporal conductivity stability and / or screen printing suitability, the amount of the component (D1) is about 0.5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the component (A). Is preferred. From the same viewpoint, the aforementioned range is more preferably about 3 parts by mass or more and 15 parts by mass or less.
- a typical example of the component (D2) is a diketone compound that acts as a chelating agent for monovalent or divalent metal ions.
- Various known diketone compounds can be used without particular limitation as the component (D2).
- the component (D2) forms a complex with a monovalent or divalent metal ion.
- an example particularly suitable as the component (D2) is likely to cause a ligand exchange reaction with the component (D1) described above, and as a result, contributes to the temporal conductivity stability of the conductive paste of the present embodiment. Is. Accordingly, it is a particularly preferable aspect to employ a ⁇ -diketone compound represented by the following general formula (Formula 2) as the component (D2).
- Y 1 and Y 2 may be the same or different, and are each selected from the group consisting of an alkyl group, a fluoroalkyl group, an alkenyl group, an alkoxy group, a (meth) acryloyl group, a phenyl group and a benzyl group. Represents one selected group.
- the number of carbon atoms of the alkyl group, alkenyl group, and alkoxy group is not particularly limited. Their typical carbon number is about 6 or more and 18 or less.
- the alkyl group, alkenyl group, and alkoxy group may be branched.
- a halogen atom chlorine, fluorine, or the like
- one or more groups selected from the group consisting of the alkyl group, alkenyl group, and alkoxy group, an amino group, a nitro group, or a hydroxy group are bonded to the above phenyl group. It is one mode to obtain.
- ⁇ -diketone compounds are methyl acetoacetate, ethyl acetoacetate, propyl acetoacetate, butyl acetoacetate, methyl 4-methoxyacetoacetate, 2-acetoacetoxyethyl methacrylate, methyl pivaloyl acetate, methyl Isobutyroyl acetate, ethyl benzoyl acetate, ethyl paraanisoyl acetate, methyl caproyl acetate, methyl lauroyl acetate, methyl palmitoyl acetate, methyl-4-methoxyacetoacetate, methyl acetoacetate, diethylacetylacetone malonate, hexafluoroacetylacetone, benzoylacetone And at least one selected from the group consisting of dibenzoylmethane and the like.
- Examples of other (D2) components that can be employed include dehydroacetic acid, 2-cyclopentanone ethyl carboxylate, 2-cyclohexanone ethyl carboxylate, 2-cyclopentanone methyl carboxylate, or 2-cyclohexanone methyl carboxylate. It is a cyclic diketone compound.
- the amount of component (D2) used is not particularly limited. However, from the viewpoint of the temporal conductivity stability and / or screen printing suitability, the amount of the component (D2) is about 0.1 parts by mass or more and 15 parts by mass or less with respect to 100 parts by mass of the component (A). Is preferred. From the same viewpoint, the aforementioned range is more preferably about 0.5 parts by mass or more and 5 parts by mass or less. And it is especially preferable that the above-mentioned range is about 1 part by mass or more and 5 parts by mass or less.
- R 1 , R 2 , R 3 , R 4 and R 5 all represent hydrogen, a hydroxyl group, an alkyl group, a carboxy group or an amino group, and n is 0 or 1 When n is 1, A represents an alkylene group, and X represents a carboxyl group or a formyl group.
- the number of carbon atoms of the alkyl group in the above [Chemical Formula 3] is not particularly limited.
- the typical alkyl group has about 1 to 9 carbon atoms.
- the number of carbon atoms of the alkoxy group is not particularly limited.
- the typical alkoxy group has about 1 to 4 carbon atoms.
- the typical carbon number of A is about 1 or more and 3 or less.
- the A may be a branched alkylene group.
- R 1 or R 5 in the above [Chemical Formula 3] is a carboxyl group and X is a carboxyl group, both carboxyl groups may form an anhydrous ring. .
- typical examples of the component (D3) in which X is a carboxyl group include benzoic acid, parahydroxybenzoic acid, salicylic acid, terephthalic acid, phthalic acid, phthalic anhydride, and isophthalic acid.
- Other representative examples are paraethylbenzoic acid, parapropylbenzoic acid, parabutylbenzoic acid, parapentylbenzoic acid, parahexylbenzoic acid, paranonylbenzoic acid, m-aminobenzoic acid, 3,5-diaminobenzoic acid, and the like.
- representative examples of the component (D3) where X is an aldehyde group include benzaldehyde, 2-methylbenzaldehyde, 4-methylbenzaldehyde, 2-methoxybenzaldehyde, 3-methoxybenzaldehyde, 4-methoxybenzaldehyde, 4-butoxybenzaldehyde.
- a suitable example of the component (D3) is at least one selected from the group consisting of benzoic acid, aminobenzoic acid and benzaldehyde.
- the amount of component (D3) used is not particularly limited. However, from the viewpoint of the temporal conductivity stability and / or screen printing suitability, the amount of the component (D3) is about 0.1 to 15 parts by weight, preferably about 100 parts by weight of the component (A), preferably About 0.5 to 5 parts by mass, more preferably about 1 to 5 parts by mass.
- the conductive paste of the present embodiment can further contain other additives.
- other additives include a coupling agent, a surfactant, a curing agent for the component (B), a conductive auxiliary agent, a leveling agent, an antifoaming agent, a thixotropic agent (such as fine silica), and / Or a leveling agent.
- Typical examples of the above-mentioned coupling agents are known coupling agents such as silane, titanate, and aluminate.
- this coupling agent By using this coupling agent, the dispersibility of the component (A) in the conductive paste of this embodiment and the adhesion between the components (A) and (B) can be improved.
- the silane coupling agent can be suitably used to improve the adhesion between the conductive paste of the present embodiment and the substrate.
- Specific examples thereof include, for example, 3-glycidoxypropyltrimethoxysilane, epoxy-functional silanes such as 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-aminopropyltrimethoxysilane, N-2 -(Aminoethyl) 3-aminopropyltrimethoxysilane, N-2- (aminoethyl) 3-aminopropylmethyldimethoxysilane, vinyltrimethoxysilane, vinylphenyltrimethoxysilane, vinyltris (2-methoxyethoxy) silane, 3 -Acryloxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane and the like.
- typical examples of the above-mentioned surfactants are amphoteric surfactants, anionic surfactants, cationic surfactants, or nonionic surfactants.
- the screen printing suitability of the conductive paste of the present embodiment can be improved.
- Typical examples of the amphoteric surfactant include alkylbetaines and alkylamine oxides.
- Representative examples of the anionic surfactant include alkyl sulfates, polyoxyethylene alkyl sulfate esters, alkylbenzene sulfonates, alkyl naphthalene sulfonates, fatty acid salts, and salts of naphthalene sulfonate formalin condensates.
- Polycarboxylic acid type polymer surfactants alkenyl succinates, alkane sulfonates, polyoxyalkylene alkyl ether phosphates and salts thereof, or polyoxyalkylene alkyl ether phosphates and salts thereof, etc.
- a typical example of the cationic surfactant is an alkylamine salt or a quaternary ammonium salt.
- Representative examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyalkylene alkyl ether, polyoxyethylene derivative, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, glycerin. Examples thereof include fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkylamines, polyoxyalkylalkyleneamines, and alkylalkanolamides.
- curing agent contains the hydroxyl group in the above-mentioned (B) component in a molecule
- the curing agent include aromatic diisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, and xylylene diisocyanate, or Aliphatic diisocyanates such as hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, and lysine diisocyanate, or These are diisocyanate compounds such as alicyclic diisocyanates such as dicyclohexylmethane diisocyanate, isophorone diisocyanate, 1,4-cyclohexane diisocyanate, hydrogenated xylene diisocyanate, and hydrogenated tolylene diisocyanate. Furthermore, diisocyanates and trimers of the above-mentioned diisocyanate compounds, and iso
- typical examples of the above-mentioned curing agent are amino-based compounds such as melamine, urea, benzoguanamine, acetoguanamine, spiroguanamine, and dicyandiamide. It is a curing agent.
- a typical example of the above curing agent is an aziridine curing agent or an epoxy curing agent.
- Typical examples of the above-mentioned conductive auxiliary agent are metal oxides such as indium tin oxide (ITO), antimony trioxide (ATO), gallium-doped zinc oxide (GZO), aluminum-doped zinc oxide (AZO), or graphite powder.
- metal oxides such as indium tin oxide (ITO), antimony trioxide (ATO), gallium-doped zinc oxide (GZO), aluminum-doped zinc oxide (AZO), or graphite powder.
- Carbon black fillers such as furnace black, channel black, lamp black, acetylene black, and ketjen black.
- a typical example of the above-mentioned leveling agent is a silicone leveling agent, a fluorine leveling agent, an acrylic leveling agent, or the like.
- the conductive paste of the present embodiment includes the above-mentioned component (A), component (B), component (C), component (D1), component (D2), component (D3), and other additives as necessary.
- a conductive coating film, wiring, and electrodes can be obtained.
- the substrate are plastic films such as polyethylene terephthalate, polycarbonate, polyethylene, polyvinyl chloride, polypropylene, polystyrene, or polymethyl methacrylate, or an ITO film or glass obtained by ITO sputtering on the plastic film.
- plastic films such as polyethylene terephthalate, polycarbonate, polyethylene, polyvinyl chloride, polypropylene, polystyrene, or polymethyl methacrylate, or an ITO film or glass obtained by ITO sputtering on the plastic film.
- Such as a board Such as a board.
- a typical example of the printing method is screen printing or intaglio printing.
- the heating temperature is not particularly limited. A typical heating temperature is about 110 ° C. or higher and 150 ° C. or lower.
- Part is based on mass.
- Example 1 Copper particle (trade name “SCX-17”, manufactured by DOWA Electronics Co., Ltd., average primary particle size 5.7 ⁇ m) 65.9 parts, phenol resin (manufactured by Gunei Chemical Industry Co., Ltd., PL-5208, solid content 60) (Mass% diethylene glycol monoethyl ether solution) 13.6 parts, diethylene glycol monoethyl ether acetate (hereinafter also referred to as DEGMEEA) 10.2 parts, copper oxalate hemihydrate 5.7 parts, acetylacetone 2.3 parts , And 2.3 parts of benzoic acid were kneaded with three rolls to obtain a conductive paste.
- DEGMEEA diethylene glycol monoethyl ether acetate
- Example 2 51.1 parts of copper particles (SCX-17), 13.5 parts of phenoxy resin (trade name “YP-50”, manufactured by Nippon Steel Co., Ltd., diethylene glycol monoethyl ether solution with a solid content of 35 mass%), copper formate (II) By kneading 5.7 parts of tetrahydrate, 2.3 parts of acetylacetone, 2.3 parts of benzoic acid, and 26.3 parts of diethylene glycol monoethyl ether acetate (DEGMEAA) with three rolls, Sex paste was obtained.
- phenoxy resin trade name “YP-50”, manufactured by Nippon Steel Co., Ltd., diethylene glycol monoethyl ether solution with a solid content of 35 mass
- copper formate (II) By kneading 5.7 parts of tetrahydrate, 2.3 parts of acetylacetone, 2.3 parts of benzoic acid, and 26.3 parts of diethylene glycol monoethyl ether acetate
- Example 3 9.5 parts of phenoxy resin YP-50, 4.1 parts of polyester resin (trade name “XA0653”, manufactured by Unitika Ltd., ethylene glycol monoethyl ether solution with a solid content of 40% by mass), 25.0 parts of DEGMEEA Except for the points described above, the components (D1) to (D3) were treated at the same ratio as in Example 2 to obtain a conductive paste. In addition, the ratio of (A) component may change with the fluctuation
- Example 4 8.0 parts of phenoxy resin YP-50, 3.4 parts of polyester resin (trade name “XA0653”, manufactured by Unitika Ltd., ethylene glycol monoethyl ether solution with a solid content of 40% by mass), 28.4 parts of DEGMEEA Except for the points described above, the components (D1) to (D3) were treated at the same ratio as in Example 2 to obtain a conductive paste.
- Example 5 Copper particles (SCX-17) 65.9 parts, phenol resin (manufactured by Gunei Chemical Industry Co., Ltd., PL-5208, solid content 60 mass% diethylene glycol monoethyl ether solution) 13.6 parts, DEGMEEA 10.2 parts, formic acid A conductive paste was obtained by kneading 5.7 parts of copper (II) tetrahydrate, 2.3 parts of acetylacetone, and 2.3 parts of benzoic acid with three rolls.
- phenol resin manufactured by Gunei Chemical Industry Co., Ltd., PL-5208, solid content 60 mass% diethylene glycol monoethyl ether solution
- DEGMEEA 10.2 parts
- formic acid A conductive paste was obtained by kneading 5.7 parts of copper (II) tetrahydrate, 2.3 parts of acetylacetone, and 2.3 parts of benzoic acid with three rolls.
- Example 6 The ratio was the same as in Example 5 except that the copper particles (SCX-17) were changed to other copper particles (trade name “FCC-TB”, manufactured by Fukuda Metal Foil Industry Co., Ltd., average primary particle diameter: 7 ⁇ m). By processing, a conductive paste was obtained.
- Example 7 The same as Example 5 except that the copper particles (SCX-17) were changed to other copper particles (trade name “FCC-CP-X5”, manufactured by Fukuda Metal Foil Industry Co., Ltd., average primary particle size 15 ⁇ m). By processing at a ratio, a conductive paste was obtained.
- Example 8 A conductive paste was obtained by treating at the same ratio as in Example 5 except that copper (II) formate tetrahydrate was changed to 11.4 parts.
- Example 9 A conductive paste was obtained by treating at the same ratio as in Example 6 except that benzoic acid was changed to m-aminobenzoic acid.
- Example 10 A conductive paste was obtained by treating at the same ratio as in Example 9 except that m-aminobenzoic acid was changed to 3,5-diaminobenzoic acid.
- Example 11 A conductive paste was obtained by treating at the same ratio as in Example 10 except that 3,5-diaminobenzoic acid was changed to benzaldehyde.
- Example 12 A conductive paste was obtained by treating at the same ratio as in Example 6 except that acetylacetone was changed to methyl acetoacetate.
- Example 13 A conductive paste was obtained by treating at the same ratio as in Example 12 except that methyl acetoacetate was changed to ethyl acetoacetate.
- Example 14 Copper particle (SCX-17) 65.9 parts, phenol resin (trade name “PL-5208”, manufactured by Gunei Chemical Industry Co., Ltd., solid content 60 mass% diethylene glycol monoethyl ether solution) 13.6 parts, DEGMEEA 10. 2 parts, 5.7 parts of silver formate, 2.3 parts of acetylacetone, and 2.3 parts of benzoate were kneaded with three rolls to obtain a conductive paste.
- FIG. 2 is an electron micrograph corresponding to FIG. As shown in FIG. 2, precipitates (considered substances) observed in FIG. 1 are not observed.
- Example 3 A conductive paste was obtained by treating at the same ratio as in Example 6 except that benzoic acid and copper (II) formate tetrahydrate were not used.
- the initial volume resistivity of the coating film immediately after drying 12 hours, 72 hours, 192 hours And volume resistivity (unit: ⁇ ⁇ cm) when 520 hours passed, respectively, were measured at 80 ° C. Further, for the coating films of Examples 1 to 8, the volume resistivity after 1000 hours was also measured at 80 ° C.
- the conductive paste of the above-described embodiment and each example is mainly useful as an electrode for an electronic component or a wiring for a printed wiring board.
- the present invention can be applied to various uses of baking type and non-baking type conductive pastes.
- the conductive paste of this embodiment can be applied to a capacitor external electrode, a solar cell conductive circuit, an ITO glass electrode, a TO glass electrode, a soldered conductive portion of a printed circuit, and the like.
- a cured product, an electronic component, or an electronic device provided with the conductive paste of each of the above-described embodiments can be applied to a wide range of uses, like the conductive paste of each of the above-described embodiments.
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Abstract
Description
さらに、配位子交換反応の結果として生成した(D1)成分由来の有機モノカルボン酸の還元作用により、上述の(A)成分の表面に形成されている酸化皮膜が還元される。その結果、(A)成分が本来有する導電性が回復すると考えられる。加えて、上述の配位子交換反応の結果として生じた(D2)成分の金属錯体は、加熱下で分解する。その結果、放出された(D1)成分由来の、換言すれば、(D1)成分と(D2)成分との配位子交換反応により生成された金属粒子である微細粒子が、(A)成分の表面や、連続相中に析出する。代表的な一例においては、その(D1)成分の一部である金属から生成された粒子(金属粒子)が、前述の(A)成分の表面の一部又は全部を覆うことになる。しかしながら、この金属粒子は表面に酸化皮膜を有していないため、それ自体が導通性に優れる。従って、この導電性ペーストによれば、室温下のみならず高温下でも体積抵抗率の経時的な低下幅が小さい塗膜が得られる(以下、「体積抵抗率の経時的な低下幅が小さいために経時的な導電性の変化が小さい」ことを、簡略的に「経時導電安定性」ともいう。)。また、この導電性ペーストはスクリーン印刷適性が良好であるため、微細な配線や微小な電極を形成することができる。なお、この導電性ペーストによれば、銀ペーストの経時導電安定性を同等の経時導電安定性を備え得るものも得られる。
本実施形態の導電性ペーストは、(A)金属微粒子(以下、(A)成分という。)、(B)樹脂結着剤(以下、(B)成分という。)、及び(C)有機溶剤(以下、(C)成分という。)を含む導電性ペーストである。加えて、本実施形態の導電性ペーストは、さらに、(D1)有機モノカルボン酸金属塩(以下、(D1)成分という。)と、(D2)ジケトン系キレート剤(以下、(D2)成分という。)と、(D3)所定の一般式で表される芳香族化合物(以下、(D3)成分という。)とを含有している。(A)成分、(B)成分、(C)成分、(D1)成分、(D2)成分、及び(D3)成分が公知の手段(例えば、3本ロールなどの混練工程など)によって混合されることにより、本実施形態の導電性ペーストが製造される。なお、本実施形態においては、前述の(D1)、(D2)、及び(D3)は、添加剤として採用されている。また、本実施形態においては、代表的に銅粒子を(A)成分として採用している。
コハク酸、アジピン酸、アゼライン酸、セバチン酸、ドデカンジカルボン酸等の脂肪族ジカルボン酸、又は、
1,4-シクロヘキサンジカルボン酸、ヘキサヒドロ無水フタル酸、1,1´-ビシクロヘキサン-4,4´-ジカルボン酸、2,6-デカリンジカルボン酸等の脂環族ジカルボン酸、又は、
無水トリメリット酸、無水ピロメリット酸等の3価以上のポリカルボン酸等
である。
1,4-シクロヘキサンジメタノール、1,2-シクロヘキサンジメタノール、1,3-シクロヘキサンジメタノール、水添ビスフェノールA、水添ビスフェノールF等の脂環系ジオール、又は、
グリセリン、トリメチロールプロパン、トリメチロールエタン、ジグリセリン、トリグリセリン、1,2,6-ヘキサントリオール、ペンタエリスリトール、ジペンタエリスリトール、ジペンタエリスリトール、ソルビトール、マンニトール等の3価以上のポリオールである。
前述の各エポキシ樹脂に各種の公知のアミン類を反応させて得られるアミン変性樹脂、又は、
前述の各エポキシ樹脂に各種公知のアミン類とポリイソシアネート類とを反応させて得られるアミン・ウレタン変性樹脂(特開2010-235918号公報参照。)等である。
シクロペンチルアミン類、シクロヘキシルアミン類、ノルボニルアミン類等の脂環族アミン類、又は、
メチルアミン、エチルアミン、プロピルアミン、ブチルアミン、ヘキシルアミン、オクチルアミン、デシルアミン、ドデシルアミン、ステアリルアミン、イコシルアミン、2-エチルヘキシルアミン、ジメチルアミン、ジエチルアミン、ジプロピルアミン、ジブチルアミン、ジペンチルアミン、ジヘプチルアミン等の脂肪族アミン類、又は、
ジエタノ-ルアミン、ジイソプロパノ-ルアミン、ジ-2-ヒドロキシブチルアミン、N-メチルエタノ-ルアミン、N-エチルエタノ-ルアミン、N-ベンジルエタノ-ルアミン等のアルカノ-ルアミン類等である。
(メタ)アクリル酸ヒドロキシメチル、(メタ)アクリル酸ヒドロキシエチル、(メタ)アクリル酸2-ヒドロキシプロピル、(メタ)アクリル酸2-ヒドロキシブチル、(メタ)アクリル酸4-ヒドロキシブチル、(メタ)アクリル酸ヒドロキシシクロヘキシル、(メタ)アクリル酸4-(ヒドロキシメチル)シクロヘキシルメチル、2-ヒドロキシプロピオン酸4-(ヒドロキシメチル)シクロヘキシルメチル、(メタ)アクリル酸ヒドロキシフェニル等のヒドロキシ(メタ)アクリレート、又は、
アクリル酸、メタクリル酸、クロトン酸、イソクロトン酸、フマル酸、(無水)マレイン酸等のα,β不飽和カルボン酸、又は、
スチレン、α-メチルスチレン、t-ブチルスチレン、ジメチルスチレン等の芳香族ビニルモノマー、又は、
アクリルアミド、メタクリルアミド、N-(2-ヒドロキシエチル)アクリルアミド、N-(1-メチル-2-ヒドロキシエチル)アクリルアミド、(メタ)アクリルアミド類、又は、不飽和スルホン酸類、又は、
アミノアルキル系不飽和単量体類、又は、
ポリオキシアルキレン系不飽和単量体類、又は、
クロロシラン系(メタ)アクリレート類、又は、
(ポリ)シロキサンモノ(メタ)アクリレート類、又は、
フルオロアルキル(モノ)アクリレート類等である。
メチルアルコール、エチルアルコール、イソプロピルアルコール、シクロヘキサノール、エチレングリコール、プロピレングリコール、1,4-ブタンジオール、トリエチレングリコール、乳酸エチル、乳酸ブチル、ジアセトンアルコール、テレピネオール、ボルネオール等の非エーテル系アルコール、又は、
アセトン、メチルエチルケトン、メチルイソブチルケトン、シクロヘキサノン等のケトン系溶剤、又は、
酢酸メチル、酢酸エチル、酢酸ブチル、メチルメトキシプロピオネート、エチルエトキシプロピオネート、シュウ酸ジエチル、マロン酸ジエチル等のエステル系溶剤、又は、
ジクロロメタン、1,2-ジクロロエタン、1,4-ジクロロブタン、トリクロロエタン、クロルベンゼン、o-ジクロルベンゼン等のハロゲン系溶剤、又は、
ヘキサン、ヘプタン、オクタン等の脂肪族系溶剤、又は、
ベンゼン、トルエン、キシレン等の芳香族系溶剤、又は、
テレピン油又はα-ピネン等の植物系溶剤、又は、
炭酸プロピレン等である。
従って、前述のエーテル系アルコール、前述の非エーテル系アルコール、前述のエステル系溶剤、前述のケトン系溶剤、前述の脂肪族系溶剤、前述の芳香族系溶剤、及び前述の植物系溶剤からなる群より選ばれる少なくとも1種であることは、本実施形態において採用し得る一態様である。但し、これらの中でも経時導電安定性及び/又はスクリーン印刷適性の観点より前記エーテル系アルコールが好ましい。
本実施形態の導電性ペーストは、上述のとおり、添加剤として(D1)成分、(D2)成分、及び(D3)成分が導電性ペーストの構成材料の一部として配合されている。本実施形態においては、(D1)成分、(D2)成分、及び(D3)成分の相互作用により、所望の経時導電安定性及び/又はスクリーン印刷適性が達成される。
本実施形態の導電性ペーストには、必要に応じ、更に他の添加剤を配合することできる。具体的な他の添加剤の例は、カップリング剤、界面活性剤、前記(B)成分用の硬化剤、導電補助剤、レベリング剤、消泡剤、チキソトロピック剤(微細シリカ等)、及び/又はレベリング剤等である。
ヘキサメチレンジイソシアネート、トリメチルヘキサメチレンジイソシアネート、及びリジンジイソシアネー等の脂肪族ジイソシアネート、又は、
ジシクロヘキシルメタンジイソシアネート、イソホロンジイソシアネート、1,4-シクロヘキサンジイソシアネート、水添キシレンジイソシアネート、水添トリレンジイソシアネート等の脂環式ジイソシアネートといったジイソシアネート化合物である。
さらに、上述の各ジイソシアネート化合物の二量体や三量体、並びにそれらのアダクト体やブロック体といったイソシアネート系硬化剤を利用することができる。
<実施例>
銅粒子(商品名「SCX-17」、DOWAエレクトロニクス(株)製、平均一次粒子径5.7μm)65.9部、フェノール樹脂(群栄化学工業(株)製、PL-5208、固形分60質量%ジエチレングリコールモノエチルエーテル溶液)13.6部、ジエチレングリコールモノエチルエーテルアセテート(以下、DEGMEEAともいう。)10.2部、シュウ酸銅0.5水和物5.7部、アセチルアセトン2.3部、及び安息香酸2.3部を、3本ロールで混練することにより、導電性ペーストを得た。
銅粒子(SCX-17)51.1部、フェノキシ樹脂(商品名「YP-50」、新日鐵(株)製、固形分35質量%のジエチレングリコールモノエチルエーテル溶液)13.5部、ギ酸銅(II)4水和物5.7部、アセチルアセトン2.3部、安息香酸2.3部、及びジエチレングリコールモノエチルエーテルアセテート(DEGMEEA)26.3部を、3本ロールで混練することにより、導電性ペーストを得た。
フェノキシ樹脂YP-50を9.5部とし、ポリエステル樹脂(商品名「XA0653」、ユニチカ(株)製、固形分40質量%のエチレングリコールモノエチルエーテル溶液)4.1部とし、DEGMEEA25.0部とした点以外、(D1)~(D3)成分を実施例2と同様の比率で処理することにより、導電性ペーストを得た。なお、(A)成分の比率は上述の各比率の変動によって変わり得る。(以下の各実施例、各比較例、及び参考例の説明において同じ)
フェノキシ樹脂YP-50を8.0部とし、ポリエステル樹脂(商品名「XA0653」、ユニチカ(株)製、固形分40質量%のエチレングリコールモノエチルエーテル溶液)3.4部とし、DEGMEEA28.4部とした点以外、(D1)~(D3)成分を実施例2と同様の比率で処理することにより、導電性ペーストを得た。
銅粒子(SCX-17)65.9部、フェノール樹脂(群栄化学工業(株)製、PL-5208、固形分60質量%ジエチレングリコールモノエチルエーテル溶液)13.6部、DEGMEEA10.2部、ギ酸銅(II)4水和物5.7部、アセチルアセトン2.3部、及び安息香酸2.3部を、3本ロールで混練することにより、導電性ペーストを得た。
銅粒子(SCX-17)を別の銅粒子(商品名「FCC-TB」、福田金属箔工業(株)製、平均一次粒子径7μm)に変更した点以外は実施例5と同様の比率で処理することにより、導電性ペーストを得た。
銅粒子(SCX-17)を別の銅粒子(商品名「FCC-CP-X5」、福田金属箔工業(株)製、平均一次粒子径15μm)に変更した点以外は実施例5と同様の比率で処理することにより、導電性ペーストを得た。
ギ酸銅(II)4水和物を11.4部に変更した点以外は実施例5と同様の比率で処理することにより、導電性ペーストを得た。
安息香酸をm-アミノ安息香酸に変更した点以外は実施例6と同様の比率で処理することにより、導電性ペーストを得た。
m-アミノ安息香酸を3,5-ジアミノ安息香酸に変更した点以外は実施例9と同様の比率で処理することにより、導電性ペーストを得た。
3,5-ジアミノ安息香酸をベンズアルデヒドに変更した点以外は実施例10と同様の比率で処理することにより、導電性ペーストを得た。
アセチルアセトンをアセト酢酸メチルに変更した点以外は実施例6と同様の比率で処理することにより、導電性ペーストを得た。
アセト酢酸メチルをアセト酢酸エチルに変更した点以外は実施例12と同様の比率で処理することにより、導電性ペーストを得た。
銅粒子(SCX-17)65.9部、フェノール樹脂(商品名「PL-5208」、群栄化学工業(株)製、固形分60質量%ジエチレングリコールモノエチルエーテル溶液)13.6部、DEGMEEA10.2部、ギ酸銀5.7部、アセチルアセトン2.3部、及び安息香2.3部を、3本ロールで混練することにより、導電性ペーストを得た。
90部の銅粒子(SCX-17)、及び20.0部のフェノール樹脂(PL-5208)を、3本ロールで混練することにより、導電性ペーストを得た。
90部の銅粒子(SCX-17)、20.0部のフェノール樹脂(PL-5208)、及び2.0部の安息香酸を、3本ロールで混練することにより、導電性ペーストを得た。なお、図2は、比較例2における、図1に相当する電子顕微鏡写真である。図2に示すように、図1において観察された析出物(と考えられる物質)は観察されない。
安息香酸とギ酸銅(II)4水和物を用いなかった点以外は実施例6と同様の比率で処理することにより、導電性ペーストを得た。
銀粒子(商品名「SILFLAKE241」、Technic製、平均一次粒子径2.7μm)70.1部、エポキシ樹脂(商品名「jer‐1007」、三菱化学(株)製、固形分100質量%)6.1部、フェノール樹脂(商品名「ヒタノール3305N」、日立化成(株)製、固形分40質量%ジエチレングリコールモノエチルエーテルアセテート溶液)2.6部、DEGMEEA10.4部、ブチルカルビトール7.5部、ブチルカルビトールアセテート3.3部を、3本ロールで混練することにより、導電性の銀ペーストを得た。
実施例と比較例の各導電性ペーストを印刷条件でソーダガラス板上に膜厚8μmとなるよう印刷し、150℃で60分乾燥させることにより硬化塗膜を形成した。
版フレームサイズ:320mm×320mm
スキ―ジスピード:200mm/sec
スキ―ジ硬度 :80度
スキ―ジ角度 :65度
ドクタースピード:200mm/sec
クリアランス :1.5mm
Claims (14)
- 前記(D1)成分と前記(D2)成分との配位子交換反応により生成された金属粒子が、前記(A)成分の表面の一部又は全部を覆う、
請求項1に記載の導電性ペースト。 - 前記(D1)成分をなす有機モノカルボン酸が、蟻酸、シュウ酸、サリチル酸、安息香酸、ヒドロキシ酢酸、及びグリオキシル酸からなる群より選ばれる1種である、
請求項1又は請求項2に記載の導電性ペースト。 - 前記(D1)成分をなす金属が、銅、銀、パラジウム、及び白金からなる群より選ばれる少なくとも1種である、
請求項1乃至請求項3のいずれか1項に記載の導電性ペースト。 - 前記(D1)成分の量が、前記(A)成分100質量部に対して0.5質量部以上20質量部以下である、
請求項1乃至請求項4のいずれか1項に記載の導電性ペースト。 - 前記(D2)成分の量が、前記(A)成分100質量部に対して0.1質量部以上15質量部以下である、
請求項1乃至請求項5のいずれか1項に記載の導電性ペースト。 - 前記(D3)成分が、安息香酸、アミノ安息香酸、及びベンズアルデヒドからなる群より選ばれる少なくとも1種である、
請求項1乃至請求項6のいずれか1項に記載の導電性ペースト。 - 前記(D3)成分の量が、前記(A)成分100質量部に対して0.1質量部以上15質量部以下である、
請求項1乃至請求項7のいずれか1項に記載の導電性ペースト。 - 前記(A)成分である金属微粒子が、銅、コバルト、鉄、亜鉛、アルミニウム、チタン、バナジウム、マンガン、ジルコニウム、モリブデン、インジウム、ビスマス、アンチモン、タングステン、及び前記各金属の少なくとも1種を含有する合金からなる群より選ばれる少なくとも1種からなる微粒子である、
請求項1乃至請求項8のいずれか1項に記載の導電性ペースト。 - 前記金属微粒子の平均粒子径が、0.05μm以上50μm以下の粒度分布を有する、
請求項9に記載の導電性ペースト。 - 前記(B)成分が、フェノール樹脂、ポリエステル樹脂、エポキシ樹脂、ポリウレタン樹脂、及びアクリル樹脂からなる群より選ばれる少なくとも1種である、
請求項1乃至請求項10のいずれか1項に記載の導電性ペースト。 - 前記(B)成分の量が、(A)成分100質量部に対して1質量部以上30質量部以下である、
請求項1乃至請求項11のいずれか1項に記載の導電性ペースト。 - 前記(C)成分が、エーテル系アルコール、非エーテル系アルコール、エステル系溶剤、ケトン系溶剤、脂肪族系溶剤、芳香族系溶剤、及び植物系溶剤からなる群より選ばれる少なくとも1種である、
請求項1乃至請求項12のいずれか1項に記載の導電性ペースト。 - 前記(C)成分の量が、(A)成分100質量部に対して1質量部以上30質量部以下である、
請求項1乃至請求項13のいずれか1項に記載の導電性ペースト。
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