WO2024090291A1 - Composition adhésive, et feuille adhésive, corps stratifié et carte de circuit imprimé contenant ladite composition - Google Patents
Composition adhésive, et feuille adhésive, corps stratifié et carte de circuit imprimé contenant ladite composition Download PDFInfo
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- WO2024090291A1 WO2024090291A1 PCT/JP2023/037559 JP2023037559W WO2024090291A1 WO 2024090291 A1 WO2024090291 A1 WO 2024090291A1 JP 2023037559 W JP2023037559 W JP 2023037559W WO 2024090291 A1 WO2024090291 A1 WO 2024090291A1
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- resin
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- epoxy resin
- adhesive composition
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- APKLUBPFZCMIPN-UHFFFAOYSA-L magnesium;diphenylphosphinate Chemical compound [Mg+2].C=1C=CC=CC=1P(=O)([O-])C1=CC=CC=C1.C=1C=CC=CC=1P(=O)([O-])C1=CC=CC=C1 APKLUBPFZCMIPN-UHFFFAOYSA-L 0.000 description 1
- SKBBZECXICKFJD-UHFFFAOYSA-L magnesium;ethyl(methyl)phosphinate Chemical compound [Mg+2].CCP(C)([O-])=O.CCP(C)([O-])=O SKBBZECXICKFJD-UHFFFAOYSA-L 0.000 description 1
- YCDWDGJOBAYTDW-UHFFFAOYSA-L magnesium;methyl(phenyl)phosphinate Chemical compound [Mg+2].CP([O-])(=O)C1=CC=CC=C1.CP([O-])(=O)C1=CC=CC=C1 YCDWDGJOBAYTDW-UHFFFAOYSA-L 0.000 description 1
- SSJHRSPSQJENCV-UHFFFAOYSA-L magnesium;methyl(propyl)phosphinate Chemical compound [Mg+2].CCCP(C)([O-])=O.CCCP(C)([O-])=O SSJHRSPSQJENCV-UHFFFAOYSA-L 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- ZUYQAYFMISSPTF-UHFFFAOYSA-N methoxy-oxo-phenylphosphanium Chemical compound CO[P+](=O)C1=CC=CC=C1 ZUYQAYFMISSPTF-UHFFFAOYSA-N 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- RMJCJLHZCBFPDN-UHFFFAOYSA-N methyl(phenyl)phosphinic acid Chemical class CP(O)(=O)C1=CC=CC=C1 RMJCJLHZCBFPDN-UHFFFAOYSA-N 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- OTLDLKLSNZMTTA-UHFFFAOYSA-N octahydro-1h-4,7-methanoindene-1,5-diyldimethanol Chemical compound C1C2C3C(CO)CCC3C1C(CO)C2 OTLDLKLSNZMTTA-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- FPLYNRPOIZEADP-UHFFFAOYSA-N octylsilane Chemical compound CCCCCCCC[SiH3] FPLYNRPOIZEADP-UHFFFAOYSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- XNLICIUVMPYHGG-UHFFFAOYSA-N pentan-2-one Chemical compound CCCC(C)=O XNLICIUVMPYHGG-UHFFFAOYSA-N 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 150000003097 polyterpenes Chemical class 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- XRVCFZPJAHWYTB-UHFFFAOYSA-N prenderol Chemical compound CCC(CC)(CO)CO XRVCFZPJAHWYTB-UHFFFAOYSA-N 0.000 description 1
- 229950006800 prenderol Drugs 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical compound CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- WXYNMTGBLWPTNQ-UHFFFAOYSA-N tetrabutoxygermane Chemical compound CCCCO[Ge](OCCCC)(OCCCC)OCCCC WXYNMTGBLWPTNQ-UHFFFAOYSA-N 0.000 description 1
- UFDHBDMSHIXOKF-UHFFFAOYSA-N tetrahydrophthalic acid Natural products OC(=O)C1=C(C(O)=O)CCCC1 UFDHBDMSHIXOKF-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- YGBFTDQFAKDXBZ-UHFFFAOYSA-N tributyl stiborite Chemical compound [Sb+3].CCCC[O-].CCCC[O-].CCCC[O-] YGBFTDQFAKDXBZ-UHFFFAOYSA-N 0.000 description 1
- UDUKMRHNZZLJRB-UHFFFAOYSA-N triethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OCC)(OCC)OCC)CCC2OC21 UDUKMRHNZZLJRB-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- GTOWTBKGCUDSNY-UHFFFAOYSA-K tris[[ethyl(methyl)phosphoryl]oxy]alumane Chemical compound [Al+3].CCP(C)([O-])=O.CCP(C)([O-])=O.CCP(C)([O-])=O GTOWTBKGCUDSNY-UHFFFAOYSA-K 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 description 1
- MXMCTPBQIJWVBA-UHFFFAOYSA-L zinc;dimethylphosphinate Chemical compound [Zn+2].CP(C)([O-])=O.CP(C)([O-])=O MXMCTPBQIJWVBA-UHFFFAOYSA-L 0.000 description 1
- PJEUXMXPJGWZOZ-UHFFFAOYSA-L zinc;diphenylphosphinate Chemical compound [Zn+2].C=1C=CC=CC=1P(=O)([O-])C1=CC=CC=C1.C=1C=CC=CC=1P(=O)([O-])C1=CC=CC=C1 PJEUXMXPJGWZOZ-UHFFFAOYSA-L 0.000 description 1
- GYKKGOMJFMCRIN-UHFFFAOYSA-L zinc;ethyl(methyl)phosphinate Chemical compound [Zn+2].CCP(C)([O-])=O.CCP(C)([O-])=O GYKKGOMJFMCRIN-UHFFFAOYSA-L 0.000 description 1
- GLDFMLDAWXHNQU-UHFFFAOYSA-L zinc;methyl(propyl)phosphinate Chemical compound [Zn+2].CCCP(C)([O-])=O.CCCP(C)([O-])=O GLDFMLDAWXHNQU-UHFFFAOYSA-L 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
-
- 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
- H05K1/03—Use of materials for the substrate
Definitions
- the present invention relates to an adhesive composition. More specifically, the present invention relates to an adhesive composition used for bonding a resin substrate to a resin substrate or a metal substrate. In particular, the present invention relates to an adhesive composition for flexible printed wiring boards (hereinafter abbreviated as FPC), as well as an adhesive sheet, a laminate, and a printed wiring board containing the same.
- FPC flexible printed wiring boards
- Flexible printed circuit boards are boards that have electrical circuits formed on a base material made by bonding a thin, soft insulating film, such as polyimide, to a conductive metal, such as copper foil, with an adhesive. Unlike rigid boards, they are extremely thin and flexible, making them suitable for use in small gaps and bending moving parts of electronic devices, and therefore are used in many of the electronic devices around us, such as personal computers and smartphones. Many FPCs are also installed in automobiles, and the adhesives used there often require high long-term heat resistance.
- Non-Patent Document 1 In recent years, the use of power semiconductors that generate high heat has increased along with the spread of electric vehicles, and the printed wiring board materials used to mount these semiconductors are required to have even higher standards of long-term heat resistance than before (for example, Non-Patent Document 1).
- Polyester resins are generally composed of polycarboxylic acids and polyhydric alcohols. They are widely used in a variety of applications, including coatings and adhesives, because of their flexibility and the ability to freely control the molecular weight and the selection and combination of polycarboxylic acids and polyhydric alcohols.
- Polyester resins have excellent adhesion to metals, including copper, and have been used as adhesives for FPCs when mixed with a hardener (see, for example, Patent Document 1).
- the adhesive using the polyester resin described in Patent Document 1 has poor solder heat resistance and does not have the high standard of long-term heat resistance required for modern automotive applications.
- FPC adhesives are required to have circuit embedding properties that allow them to conform to the circuit pattern and ensure insulation between wiring. For this reason, when a substrate on which a circuit has been formed and a substrate having an adhesive layer are thermocompression bonded and laminated, a certain degree of flow of the adhesive components in a planar direction (hereafter referred to as resin flow) is necessary. On the other hand, excessive resin flow must be suppressed, as the adhesive components may flow out from between the wiring and cover areas outside the application range, causing problems such as poor conductivity. Improving circuit embedding properties and suppressing resin flow are mutually contradictory requirements, and the problem is that they are difficult to meet simultaneously.
- the object of the present invention is to provide an adhesive composition that has excellent adhesion and solder heat resistance, and further exhibits excellent adhesion even after being exposed to a high-temperature environment for a long period of time, and that is capable of suppressing excessive resin flow while having good circuit embedding properties, as well as an adhesive sheet, laminate, and printed wiring board that contain the same.
- the present invention comprises the following: (1) An adhesive composition comprising a polyester resin (A) and an epoxy resin (B), the epoxy resin (B) comprising at least two types of epoxy resins (b) having a nitrogen atom, one of which is the following epoxy resin (b1) and the other is the following epoxy resin (b2).
- (b1) a resin having three or less functionalities; (b2) a resin having four or more functionalities; (2) an adhesive composition containing a polyester resin (A) and an epoxy resin (B), the epoxy resin (B) containing at least two kinds of epoxy resins (b) having a nitrogen atom, one of the two kinds being the following epoxy resin (b3) and the other being the following epoxy resin (b4).
- (b3) A resin having a nitrogen atom that is not contained in an aromatic ring and is not adjacent to an aromatic ring.
- (b4) A resin having a nitrogen atom excluding (b3).
- the adhesive composition of the present invention has excellent adhesion, solder heat resistance, and long-term heat resistance, and also satisfies the requirements for circuit embedding and resin flow suppression. For this reason, it is suitable for FPC adhesives, adhesive sheets, laminates, and printed wiring boards for automotive applications.
- polyester resin (A) From the viewpoint of satisfying long-term heat resistance, the present invention uses a polyester resin (A) as the base resin.
- the polyester resin (A) used in the present invention has a chemical structure obtained by polycondensation of a polycarboxylic acid component and a polyhydric alcohol component, and each of the polycarboxylic acid component and the polyhydric alcohol component is composed of one or more selected components.
- the polycarboxylic acid component constituting the polyester resin (A) is not particularly limited, but the following polycarboxylic acids or their esters, and polycarboxylic acid anhydrides can be used.
- examples of the polycarboxylic acid include aliphatic polycarboxylic acids, alicyclic polycarboxylic acids, and aromatic polycarboxylic acids.
- Examples of the aliphatic polycarboxylic acids include adipic acid, sebacic acid, dimer acid, 1,2,3,4-butanetetracarboxylic acid, fumaric acid, maleic acid, and succinic acid.
- Examples of the alicyclic polycarboxylic acids include 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, tetrahydrophthalic acid, hexahydrophthalic acid, and methyltetrahydrophthalic acid.
- aromatic polycarboxylic acids examples include terephthalic acid, isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, 2,5-furandicarboxylic acid, 5-sodium sulfodimethylisophthalic acid, trimellitic acid, pyromellitic acid, and benzophenonetetracarboxylic acid, as well as esters and acid anhydrides thereof (pyromellitic anhydride (PMDA), etc.).
- PMDA pyromellitic anhydride
- the polyester resin (A) preferably contains a monomer unit derived from an aromatic polycarboxylic acid, and among these, the aromatic polycarboxylic acid preferably contains naphthalenedicarboxylic acid, terephthalic acid, or isophthalic acid.
- the monomer unit derived from the aromatic polycarboxylic acid is preferably 60 mol% or more, more preferably 85 mol% or more, and even more preferably 96 mol% or more, and is preferably 100 mol% or less, and may be 98 mol% or less.
- the use of an aromatic polycarboxylic acid can improve the solder heat resistance of the adhesive composition.
- the polyhydric alcohol constituting the polyester resin (A) is not particularly limited, but examples thereof include aliphatic polyhydric alcohols, alicyclic polyhydric alcohols, aromatic polyhydric alcohols, etc.
- aliphatic polyhydric alcohols include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,3-propanediol, neopentyl glycol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 2-methyl-1,3-hexanediol, 2-methyl-2-ethyl-1,3-propanediol, 2,2-diethyl-1 ,3-propanediol, 2-ethy
- the polyester resin (A) preferably contains a monomer unit derived from a polyhydric alcohol having an alkylene group having 4 or more carbon atoms.
- polyhydric alcohols having an alkylene group having 4 or more carbon atoms include 1,4-butanediol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 2-methyl-1,3-hexanediol, 2,4-diethyl-1,5-pentanediol, 2-ethyl-1,3-hexanediol, dimer diol, polytetramethylene glycol, and the like.
- the monomer unit derived from a polyhydric alcohol having an alkylene group having 4 or more carbon atoms is preferably 20 to 80 mol%, more preferably 30 to 65 mol%, and even more preferably 40 to 60 mol%.
- the adhesive strength of the adhesive composition can be improved.
- the polyester resin (A) used in the present invention can also be copolymerized with lactones or lactams.
- lactones or lactams for example, ⁇ -caprolactone or ⁇ -caprolactam can be used.
- the polymerization condensation reaction method for producing the polyester resin (A) used in the present invention includes, for example, 1) a method in which a polycarboxylic acid and a polyhydric alcohol are heated in the presence of a known catalyst, and a dehydration esterification process is performed, followed by a polyhydric alcohol removal/polycondensation reaction; 2) a method in which an alcohol ester of a polycarboxylic acid and a polyhydric alcohol are heated in the presence of a known catalyst, and a transesterification reaction is performed, followed by a polyhydric alcohol removal/polycondensation reaction; and 3) a method in which depolymerization is performed.
- a part or all of the acid component may be replaced with an acid anhydride.
- polyester resin (A) used in the present invention conventionally known polymerization catalysts such as titanium compounds, antimony compounds, germanium compounds, and metal acetates can be used.
- titanium compounds such as tetra-n-butyl titanate, tetraisopropyl titanate, and titanium oxyacetylcetonate can be used; antimony compounds such as antimony trioxide and tributoxyantimony can be used; germanium compounds such as germanium oxide and tetra-n-butoxygermanium can be used; and metal acetates such as magnesium, iron, zinc, manganese, cobalt, and aluminum can be used.
- These catalysts can be used alone or in combination of two or more.
- the number average molecular weight of the polyester resin (A) used in the present invention is preferably less than 100,000, more preferably 50,000 or less, and even more preferably 25,000 or less. It is also preferably 3,000 or more, more preferably 5,000 or more, and even more preferably 9,000 or more. If it is within the above range, it is easy to handle when dissolved in a solvent, and an adhesive composition with excellent adhesion can be obtained.
- the glass transition temperature of the polyester resin (A) used in the present invention is preferably 0°C or higher, more preferably 10°C or higher, and even more preferably 20°C or higher. It is also preferably 200°C or lower, more preferably 100°C or lower, and even more preferably 50°C or lower. If it is within the above range, an adhesive composition with excellent adhesion can be obtained.
- the acid value of the polyester resin (A) used in the present invention is preferably 50 eq/10 6 g or more, more preferably 80 eq/10 6 g or more.
- the acid value 50 eq/10 6 g or more By making the acid value 50 eq/10 6 g or more, the number of reaction points with the epoxy resin (B) increases, and a tough adhesive layer with high crosslink density can be formed after curing, resulting in excellent solder heat resistance.
- the upper limit of the acid value is not particularly limited, but is usually 1000 eq/10 6 g or less, more preferably 500 eq/10 6 g or less, and even more preferably 400 eq/10 6 g or less.
- the acid value of the polyester resin (A) can be increased by any of the following methods: (1) adding a polyvalent carboxylic acid having a valence of three or more and/or an anhydride polyvalent carboxylic acid having a valence of three or more after the polycondensation reaction is completed and reacting (acid addition); or (2) intentionally modifying the resin by applying heat, oxygen, water, or the like during the polycondensation reaction.
- the polyvalent carboxylic acid anhydride used in the acid addition method is not particularly limited, but examples include trimellitic anhydride, pyromellitic anhydride, hexahydrophthalic anhydride, 3,3,4,4-benzophenonetetracarboxylic dianhydride, 3,3,4,4-biphenyltetracarboxylic dianhydride, and ethylene glycol bistrimellitic anhydride. One or more of these can be used. Trimellitic anhydride is preferred.
- Epoxy resin (B) contains an epoxy resin (b) having a nitrogen atom.
- epoxy resin is not particularly limited as long as it has one or more epoxy groups in the molecule. By using an epoxy resin having a nitrogen atom, the long-term heat resistance is improved.
- the nitrogen atoms in the skeleton of the epoxy resin (b) that contains nitrogen atoms have a catalytic effect, and as a result, it has a higher reactivity with polyester resins than other epoxy resins. Due to this high reactivity, when the adhesive composition is applied to a substrate and dried, curing progresses to a certain extent, and excessive resin flow can be suppressed when the resin is attached to a substrate on which a circuit has been formed.
- epoxy resin (b) having a nitrogen atom examples include glycidylamine type epoxy resins, triazine derivative epoxy resins, etc., and glycidylamine type epoxy resins are preferred in order to obtain the effects of the present invention more significantly.
- glycidylamine type epoxy resins include aliphatic glycidylamine type epoxy resins, alicyclic glycidylamine type epoxy resins, and aromatic glycidylamine type epoxy resins.
- Examples of alicyclic glycidylamine type epoxy resins include 1,3-bis(diglycidylaminomethyl)cyclohexane, and examples of aromatic glycidylamine type epoxy resins include N,N-diglycidylaniline, N,N-diglycidyl-o-toluidine, N,N,O-triglycidyl-p-aminophenol, N,N,O-triglycidyl-4-amino-3-methylphenol, N,N,N',N'-tetraglycidyl-(4,4'-methylenebisaniline), N,N,N',N'-tetraglycidyl-2,2'-diethyl-4,4'-methylenedianiline, and N,N,N',N'-tetraglycidyl-m-xylylenediamine.
- aromatic glycidylamine type epoxy resins include N,N-diglycidylaniline, N,N-digly
- triazine derivative epoxy resins include 1,3,5-triglycidyl isocyanurate.
- the adhesive composition of the present invention is characterized by containing at least two types of epoxy resins (b) having nitrogen atoms.
- one of the two types of nitrogen-atom-containing epoxy resins (b) be a resin with three or fewer functionalities (hereinafter referred to as b1) and the other be a resin with four or more functionalities (hereinafter referred to as b2).
- the number of functionalities refers to the number of epoxy groups in one molecule.
- (b1) include N,N-diglycidylaniline, N,N-diglycidyl-o-toluidine, N,N,O-triglycidyl-p-aminophenol, N,N,O-triglycidyl-4-amino-3-methylphenol, and 1,3,5-triglycidyl isocyanurate
- specific examples of (b2) include 1,3-bis(diglycidylaminomethyl)cyclohexane, N,N,N',N'-tetraglycidyl-(4,4'-methylenebisaniline), N,N,N',N'-tetraglycidyl-2,2'-diethyl-4,4'-methylenedianiline, and N,N,N',N'-tetraglycidyl-m-xylylenediamine.
- the content of (b1) per 100 parts by mass of the epoxy resin (b) having nitrogen atoms is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 50 parts by mass or more. Also, it is preferably 80 parts by mass or less, more preferably 75 parts by mass or less, and even more preferably 70 parts by mass or less.
- the content of (b2) per 100 parts by mass of the epoxy resin (b) having a nitrogen atom is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 30 parts by mass or more. Also, it is preferably 80 parts by mass or less, more preferably 70 parts by mass or less, and even more preferably 50 parts by mass or less.
- the content of (b1) is preferably 20 parts by mass or more and 300 parts by mass or less, more preferably 60 parts by mass or more and 250 parts by mass or less, and even more preferably 120 parts by mass or more and 240 parts by mass or less, per 100 parts by mass of (b2).
- the two types of epoxy resins (b) having nitrogen atoms are particularly preferably such that one is a resin having nitrogen atoms that are not contained in an aromatic ring and are not adjacent to an aromatic ring (hereinafter referred to as b3), and the other is a resin having nitrogen atoms other than (b3) (hereinafter referred to as b4), i.e., a resin having nitrogen atoms contained in an aromatic ring or adjacent to an aromatic ring and excluding (b3).
- (b3) include 1,3-bis(diglycidylaminomethyl)cyclohexane, N,N,N',N'-tetraglycidyl-m-xylylenediamine, etc.
- Specific examples of (b4) include N,N-diglycidylaniline, N,N-diglycidyl-o-toluidine, N,N,O-triglycidyl-p-aminophenol, N,N,O-triglycidyl-4-amino-3-methylphenol, N,N,N',N'-tetraglycidyl-(4,4'-methylenebisaniline), N,N,N',N'-tetraglycidyl-2,2'-diethyl-4,4'-methylenedianiline, 1,3,5-triglycidyl isocyanurate, etc.
- the content of (b3) per 100 parts by mass of the epoxy resin (b) having a nitrogen atom is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 30 parts by mass or more. Also, it is preferably 80 parts by mass or less, more preferably 70 parts by mass or less, and even more preferably 50 parts by mass or less.
- the content of (b4) per 100 parts by mass of the epoxy resin (b) having a nitrogen atom is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 50 parts by mass or more. Also, it is preferably 80 parts by mass or less, more preferably 75 parts by mass or less, and even more preferably 70 parts by mass or less.
- the content of (b3) is preferably 20 parts by mass or more and 300 parts by mass or less, more preferably 30 parts by mass or more and 200 parts by mass or less, and even more preferably 40 parts by mass or more and 90 parts by mass or less, per 100 parts by mass of (b4).
- the nitrogen-containing epoxy resin (b) it is particularly preferable from the viewpoint of circuit embedding properties and suppression of resin flow that one of the two types is a resin having two or more nitrogen atoms and the other is a resin having one nitrogen atom.
- the resin having two or more nitrogen atoms include glycidylamine-type epoxy resins such as 1,3-bis(diglycidylaminomethyl)cyclohexane, N,N,N',N'-tetraglycidyl-(4,4'-methylenebisaniline), N,N,N',N'-tetraglycidyl-2,2'-diethyl-4,4'-methylenedianiline, and N,N,N',N'-tetraglycidyl-m-xylylenediamine, and examples of triazine derivative epoxy resins include 1,3,5-triglycidyl isocyanurate.
- resins having one nitrogen atom include N,N-diglycidylaniline, N,N-diglycidyl-o-toluidine, N,N,O-triglycidyl-p-aminophenol, and N,N,O-triglycidyl-4-amino-3-methylphenol.
- the content of the resin having one nitrogen atom per 100 parts by mass of the nitrogen-containing epoxy resin (b) is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 50 parts by mass or more. Also, it is preferably 80 parts by mass or less, more preferably 75 parts by mass or less, and even more preferably 70 parts by mass or less.
- the content of the resin having two or more nitrogen atoms per 100 parts by mass of the nitrogen-containing epoxy resin (b) is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 30 parts by mass or more. Also, it is preferably 80 parts by mass or less, more preferably 70 parts by mass or less, and even more preferably 50 parts by mass or less.
- the content of the resin having one nitrogen atom is preferably 20 parts by mass or more and 300 parts by mass or less, more preferably 60 parts by mass or more and 250 parts by mass or less, and even more preferably 120 parts by mass or more and 240 parts by mass or less, per 100 parts by mass of the resin having two or more nitrogen atoms.
- the content of the resin (b) having a nitrogen atom is preferably 40 parts by mass or more per 100 parts by mass of the epoxy resin (B), more preferably 60 parts by mass or more, and even more preferably 70 parts by mass or more, and may be 100 parts by mass.
- the content is equal to or more than the lower limit, the long-term heat resistance is particularly good.
- the adhesive composition of the present invention may contain an epoxy resin other than the nitrogen-atom-containing epoxy resin (b).
- the epoxy resin other than the nitrogen-atom-containing epoxy resin (b) is not particularly limited as long as it has an epoxy group in the molecule, but is preferably one having two or more epoxy groups in the molecule. Specifically, it is not particularly limited, but at least one selected from the group consisting of biphenyl-type epoxy resin, naphthalene-type epoxy resin, bisphenol A-type epoxy resin, bisphenol F-type epoxy resin, novolac-type epoxy resin, alicyclic epoxy resin, dicyclopentadiene-type epoxy resin, dimer acid-modified epoxy resin, and epoxy-modified polybutadiene can be used.
- the content of epoxy resin (B) is preferably 0.1 parts by mass or more, more preferably 1 part by mass or more, per 100 parts by mass of polyester resin (A) in total. If it is equal to or more than the lower limit, a sufficient curing effect can be obtained, and excellent adhesion and solder heat resistance can be exhibited. Also, it is preferably 20 parts by mass or less, more preferably 10 parts by mass or less. If it is equal to or less than the upper limit, long-term heat resistance becomes good. In other words, by keeping it within the above range, an adhesive composition having better adhesion, solder heat resistance, and long-term heat resistance can be obtained.
- the adhesive composition of the present invention may contain a flame retardant.
- the flame retardant is not particularly limited, but may be an organic phosphorus compound or an organic metal phosphinate (C). Since the organic metal phosphinate (C) is particularly effective in achieving both flame retardancy and long-term heat resistance, the organic metal phosphinate (C) is preferred.
- organic phosphorus compounds include 9,10-dihydro-10-benzyl-9-oxa-10-phosphaphenanthrene-10-oxide, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, etc.
- organic metal phosphinate examples include dimethylphosphinate, ethylmethylphosphinate, diethylphosphinate, methyl-n-propylphosphinate, methylphenylphosphinate, diphenylphosphinate, methane di(methylphosphinic acid) salt, and benzene-1,4-di(methylphosphinic acid) salt.
- dimethylphosphinates include magnesium dimethylphosphinate, calcium dimethylphosphinate, zinc dimethylphosphinate, and aluminum dimethylphosphinate.
- Examples of ethylmethylphosphinates include magnesium ethylmethylphosphinate, calcium ethylmethylphosphinate, zinc ethylmethylphosphinate, and aluminum ethylmethylphosphinate.
- Examples of diethylphosphinates include magnesium diethylphosphinate, calcium diethylphosphinate, zinc diethylphosphinate, and aluminum diethylphosphinate.
- Examples of methyl-n-propylphosphinates include magnesium methyl-n-propylphosphinate, calcium methyl-n-propylphosphinate, zinc methyl-n-propylphosphinate, and aluminum methyl-n-propylphosphinate.
- Examples of methylphenylphosphinates include magnesium methylphenylphosphinate.
- Examples of diphenylphosphinates that can be used include magnesium diphenylphosphinate, calcium diphenylphosphinate, zinc diphenylphosphinate, and aluminum diphenylphosphinate;
- examples of methane di(methylphosphinic acid) salts include magnesium methane di(methylphosphinic acid), calcium methane di(methylphosphinic acid), zinc methane di(methylphosphinic acid), and aluminum methane di(methylphosphinic acid);
- examples of benzene-1,4-di(methylphosphinic acid) salts include magnesium benzene-1,4-di(methylphosphinic acid), calcium benzene-1,4-di(methylphosphinic acid), zinc benzene-1,4-di(methylphosphinic acid), and aluminum benzene-1,4-di(methylphosphinic acid
- the content of the flame retardant is preferably 1 to 40 parts by mass, and more preferably 5 to 20 parts by mass, per 100 parts by mass of polyester resin (A) in total.
- the adhesive composition of the present invention may further contain an organic solvent.
- the organic solvent used in the present invention is not particularly limited as long as it dissolves the polyester resin (A) and the epoxy resin (B).
- Specific examples of the organic solvent include aromatic hydrocarbons, aliphatic hydrocarbons, alicyclic hydrocarbons, halogenated hydrocarbons, alcohol solvents, ketone solvents, ester solvents, and glycol ether solvents.
- aromatic hydrocarbons include benzene, toluene, and xylene.
- Examples of aliphatic hydrocarbons include hexane, heptane, octane, and decane.
- Examples of alicyclic hydrocarbons include cyclohexane, cyclohexene, methylcyclohexane, and ethylcyclohexane.
- Examples of halogenated hydrocarbons include trichloroethylene, dichloroethylene, chlorobenzene, and chloroform.
- Examples of alcohol solvents include methanol, ethanol, isopropyl alcohol, butanol, pentanol, hexanol, propanediol, and phenol.
- Examples of ketone solvents include acetone and methyl isopropyl alcohol.
- solvents examples include isobutyl ketone, methyl ethyl ketone, pentanone, hexanone, cyclohexanone, isophorone, acetophenone, etc.
- ester solvents include methyl acetate, ethyl acetate, butyl acetate, methyl propionate, butyl formate, etc.
- glycol ether solvents include ethylene glycol monomethyl ether, ethylene glycol mono n-butyl ether, ethylene glycol mono iso-butyl ether, ethylene glycol mono tert-butyl ether, diethylene glycol mono n-butyl ether, diethylene glycol mono iso-butyl ether, triethylene glycol mono n-butyl ether, tetraethylene glycol mono n-butyl ether, etc., and these can be used alone or in combination of two or more.
- aromatic hydrocarbons or ketone solvents are examples of aromatic hydrocarbon
- the content of the organic solvent is preferably in the range of 100 to 1000 parts by mass per 100 parts by mass of polyester resin (A) in total.
- the content is preferably in the range of 100 to 1000 parts by mass per 100 parts by mass of polyester resin (A) in total.
- the adhesive composition of the present invention may further contain other components as necessary.
- specific examples of such components include a tackifier, a filler, and a silane coupling agent.
- the adhesive composition of the present invention may contain a tackifier as necessary.
- tackifiers include polyterpene resins, rosin resins, aliphatic petroleum resins, alicyclic petroleum resins, copolymerized petroleum resins, styrene resins, and hydrogenated petroleum resins, and are used for the purpose of improving adhesive strength. These may be used alone or in any combination of two or more.
- a tackifier When a tackifier is contained, it is preferably contained in a range of 1 to 200 parts by mass, more preferably in a range of 5 to 150 parts by mass, and most preferably in a range of 10 to 100 parts by mass, relative to a total of 100 parts by mass of the polyester resin (A) and the epoxy resin (B). By keeping it within the above range, the effect of the tackifier can be expressed while maintaining adhesion and solder heat resistance.
- the adhesive composition of the present invention may contain a filler as necessary.
- the filler include organic fillers and inorganic fillers.
- the organic fillers include heat-resistant resins such as polyimide, polyamideimide, fluororesin, and liquid crystal polyester powders
- the inorganic fillers include silica (SiO 2 ), alumina (Al 2 O 3 ), titania (TiO 2 ), tantalum oxide (Ta 2 O 5 ), zirconia (ZrO 2 ), silicon nitride (Si 3 N 4 ), boron nitride (BN), calcium carbonate (CaCO 3 ), calcium sulfate (CaSO 4 ), zinc oxide (ZnO), magnesium titanate (MgO.TiO 2 ), barium sulfate (BaSO 4 ), organic bentonite, clay, mica, aluminum hydroxide, and magnesium hydroxide.
- silica is preferred because of its ease of dispersion and its effect of improving solder heat resistance.
- hydrophobic silica and hydrophilic silica are known as silica, but in this case, hydrophobic silica treated with dimethyldichlorosilane, hexamethyldisilazane, octylsilane, etc. is better in order to impart moisture absorption resistance.
- the blending amount is preferably 0.05 to 50 parts by mass per 100 parts by mass of the polyester resin (A) and the epoxy resin (B) combined. By making the amount equal to or greater than the lower limit, further solder heat resistance can be achieved. Also, by making the amount equal to or less than the upper limit, poor dispersion of the filler and excessively high solution viscosity can be suppressed, and workability can be improved.
- the adhesive composition of the present invention may contain a silane coupling agent as necessary.
- the incorporation of a silane coupling agent is highly preferred because it improves the adhesiveness to metals and solder heat resistance.
- the silane coupling agent is not particularly limited, but examples include those having an unsaturated group, those having an epoxy group, and those having an amino group.
- silane coupling agents include ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and ⁇ -(3,4-epoxycyclohexyl)ethyltriethoxysilane.
- the amount of the silane coupling agent is preferably 0.5 to 20 parts by mass per 100 parts by mass of the total of the polyester resin (A) and the epoxy resin (B). By keeping the amount within the above range, the solder heat resistance and adhesiveness can be improved.
- the laminate of the present invention is a laminate of the adhesive composition on a substrate (a two-layer laminate of substrate/adhesive layer), or a three-layer laminate of substrate/adhesive layer/substrate.
- the adhesive layer refers to a layer of the adhesive composition after the adhesive composition of the present invention is applied to a substrate and dried.
- the adhesive composition of the present invention can be applied to various substrates according to a conventional method, dried, and then laminated with another substrate to obtain the laminate of the present invention.
- the substrate is not particularly limited as long as it is capable of forming an adhesive layer by applying and drying the adhesive composition of the present invention
- examples of the substrate include resin substrates such as film-like resins, metal substrates such as metal plates and metal foils, papers, etc.
- the substrate in the present invention may be made of a composite material.
- resin substrates examples include polyester resins, polyamide resins, polyimide resins, polyamideimide resins, liquid crystal polymers, polyphenylene sulfide, syndiotactic polystyrene, polyolefin resins, and fluorine resins.
- a film-like resin hereinafter also referred to as a substrate film layer is preferred.
- any conventionally known conductive material that can be used for a circuit board can be used as the metal substrate.
- materials include various metals such as SUS, copper, aluminum, iron, steel, zinc, and nickel, as well as their alloys, plated products, and metals treated with other metals such as zinc and chromium compounds.
- Metal foil is preferred, and copper foil is more preferred.
- the thickness of the metal foil is preferably 1 ⁇ m or more, more preferably 3 ⁇ m or more, and even more preferably 10 ⁇ m or more. It is also preferably 50 ⁇ m or less, more preferably 30 ⁇ m or less, and even more preferably 20 ⁇ m or less.
- Metal foil is usually provided in a rolled form.
- the form of the metal foil used in manufacturing the printed wiring board of the present invention there is no particular limitation on its length.
- the surface roughness of the substrate it is preferably 3 ⁇ m or less, more preferably 2 ⁇ m or less, and even more preferably 1.5 ⁇ m or less. In practical terms, it is preferably 0.3 ⁇ m or more, more preferably 0.5 ⁇ m or more, and even more preferably 0.7 ⁇ m or more.
- Examples of paper include fine paper, craft paper, roll paper, glassine paper, etc.
- Examples of composite materials include glass epoxy, etc.
- the substrate is preferably polyester resin, polyamide resin, polyimide resin, polyamideimide resin, liquid crystal polymer, polyphenylene sulfide, syndiotactic polystyrene, polyolefin resin, fluorine resin, SUS steel plate, copper foil, aluminum foil, or glass epoxy.
- the adhesive sheet is a laminate of the substrate and the release substrate via an adhesive composition.
- Specific configurations include substrate/adhesive layer/release substrate, or release substrate/adhesive layer/substrate/adhesive layer/release substrate.
- the release substrate functions as a protective layer for the adhesive layer by laminating it.
- the release substrate can be released from the adhesive sheet and the adhesive layer can be transferred to another substrate.
- the adhesive sheet of the present invention can be obtained by applying the adhesive composition of the present invention to various laminates and drying them in the usual manner. Furthermore, by attaching a release substrate to the adhesive layer after drying, it is possible to wind it up without causing offset onto the substrate, which is excellent in operability, and since the adhesive layer is protected, it is excellent in storage stability and easy to use. Furthermore, if a release substrate is attached after application and drying, it is also possible to transfer the adhesive layer itself to another substrate if another release substrate is attached as necessary.
- the release substrate is not particularly limited, but examples thereof include those in which a coating layer of a filler such as clay, polyethylene, or polypropylene is provided on both sides of paper such as fine paper, craft paper, roll paper, or glassine paper, and a silicone-based, fluorine-based, or alkyd-based release agent is further applied on each coating layer.
- a coating layer of a filler such as clay, polyethylene, or polypropylene
- paper such as fine paper, craft paper, roll paper, or glassine paper
- a silicone-based, fluorine-based, or alkyd-based release agent is further applied on each coating layer.
- Other examples include various olefin films such as polyethylene, polypropylene, ethylene- ⁇ -olefin copolymer, and propylene- ⁇ -olefin copolymer alone, and films such as polyethylene terephthalate on which the release agent is applied.
- the method of coating the adhesive composition on the substrate is not particularly limited, but examples thereof include a comma coater and a reverse roll coater.
- an adhesive layer can be provided directly or by a transfer method on the rolled copper foil or polyimide film that is the printed wiring board constituent material.
- the thickness of the adhesive layer after drying can be appropriately changed as necessary, but is preferably in the range of 5 to 200 ⁇ m. By making the adhesive film thickness 5 ⁇ m or more, sufficient adhesive strength can be obtained. In addition, by making it 200 ⁇ m or less, it becomes easier to control the amount of residual solvent in the drying process, and swelling is less likely to occur during pressing in the production of printed wiring boards.
- the drying conditions are not particularly limited, but the residual solvent rate after drying is preferably 1 mass % or less. By making it 1 mass % or less, foaming of the residual solvent is suppressed during pressing of the printed wiring board, and swelling is less likely to occur.
- the printed wiring board in the present invention includes, as a component, a laminate formed from a metal foil forming a conductor circuit and a resin substrate.
- the printed wiring board is manufactured by a conventionally known method such as a subtractive method using a metal-clad laminate. If necessary, the printed wiring board is a general term for so-called flexible circuit boards (FPC), flat cables, circuit boards for tape automated bonding (TAB), etc., in which a conductor circuit formed by a metal foil is partially or entirely covered with a cover film, screen printing ink, etc.
- FPC flexible circuit boards
- TAB tape automated bonding
- the printed wiring board of the present invention can have any laminated structure that can be used as a printed wiring board.
- it can be a printed wiring board consisting of four layers: a base film layer, a metal foil layer, an adhesive layer, and a cover film layer.
- It can also be a printed wiring board consisting of five layers: a base film layer, an adhesive layer, a metal foil layer, an adhesive layer, and a cover film layer.
- the adhesive composition of the present invention can be suitably used for each adhesive layer of a printed wiring board.
- the adhesive composition of the present invention when used as an adhesive, it has high adhesion to conventional resin substrates such as polyimide, polyester film, copper foil, and aluminum foil that constitute printed wiring boards, and can provide solder reflow resistance. Therefore, it is suitable as an adhesive composition for use in coverlay films, laminates, resin-coated copper foil, bonding sheets, and reinforcing materials.
- any resin film that has been conventionally used as a substrate for printed wiring boards can be used as the substrate film.
- resins for the substrate film include polyester resins, polyamide resins, polyimide resins, polyamideimide resins, liquid crystal polymers, polyphenylene sulfide, syndiotactic polystyrene, polyolefin resins, and fluorine-based resins.
- any insulating film conventionally known as an insulating film for printed wiring boards can be used.
- films made of various polymers such as polyimide, polyester, polyphenylene sulfide, polyethersulfone, polyetheretherketone, aramid, polycarbonate, polyarylate, polyamideimide, liquid crystal polymer, syndiotactic polystyrene, and polyolefin resin can be used. More preferably, it is a polyimide film.
- the printed wiring board of the present invention can be manufactured using any conventionally known process, except for using the materials for each layer described above.
- a semi-finished product is manufactured in which an adhesive layer is laminated on a cover film layer (hereinafter referred to as a "cover film side semi-finished product").
- a semi-finished product is manufactured in which a metal foil layer is laminated on a base film layer to form a desired circuit pattern (hereinafter referred to as a "base film side two-layer semi-finished product”), or a semi-finished product is manufactured in which an adhesive layer is laminated on a base film layer and a metal foil layer is laminated on top of it to form a desired circuit pattern (hereinafter referred to as a "base film side three-layer semi-finished product”) (hereinafter, the base film side two-layer semi-finished product and the base film side three-layer semi-finished product are collectively referred to as the "base film side semi-finished product").
- the semi-finished product on the base film side can be obtained, for example, by a manufacturing method including a process (A) of applying a solution of the resin that will become the base film to the metal foil and initially drying the coating, and a process (B) of heat-treating and drying the laminate of the metal foil and the initially dried coating obtained in (A) (hereinafter referred to as the "heat treatment/solvent removal process").
- the formation of the circuit in the metal foil layer can be achieved by a conventional method. Either an additive method or a subtractive method can be used. A subtractive method is preferred.
- the obtained semi-finished product on the base film side may be used as is for bonding to the semi-finished product on the cover film side, or it may be used for bonding to the semi-finished product on the cover film side after bonding a release film and storing it.
- the cover film side semi-finished product is produced, for example, by applying an adhesive to the cover film. If necessary, a crosslinking reaction can be carried out in the applied adhesive. In a preferred embodiment, the adhesive layer is semi-cured.
- the obtained semi-finished product on the cover film side may be used as is for bonding to the semi-finished product on the base film side, or it may be used for bonding to the semi-finished product on the base film side after bonding a release film and storing it.
- the semi-finished product on the base film side and the semi-finished product on the cover film side are stored, for example, in the form of a roll, and then laminated together to produce a printed wiring board. Any method can be used for laminating them together, and for example, they can be laminated together using a press or roll. They can also be laminated together while heating them, for example, using a heated press or a heated roll device.
- the semi-finished reinforcing material is preferably manufactured by applying an adhesive to the reinforcing material.
- an adhesive such as a metal plate such as SUS or aluminum, or a plate made of glass fiber cured with epoxy resin
- it is preferably manufactured by transfer-coating an adhesive that has been applied in advance to a release substrate. If necessary, a crosslinking reaction can be carried out in the applied adhesive.
- the adhesive layer is semi-cured.
- the obtained semi-finished product on the reinforcing material side may be used as is for bonding to the back surface of a printed wiring board, or it may be used for bonding to the semi-finished product on the base film side after a release film has been applied and stored.
- the base film semi-finished product, the cover film semi-finished product, and the reinforcing material semi-finished product are all laminates for printed wiring boards according to the present invention.
- polyester resin (A) was dissolved and/or diluted with tetrahydrofuran so that the resin concentration was about 0.5% by mass, and filtered through a polytetrafluoroethylene membrane filter with a pore size of 0.5 ⁇ m to prepare a measurement sample.
- the molecular weight was measured by gel permeation chromatography (GPC) using tetrahydrofuran as the mobile phase and a differential refractometer as the detector. The flow rate was 1 mL/min, and the column temperature was 30° C.
- the columns used were KF-802, 804L, and 806L manufactured by Showa Denko. Monodisperse polystyrene was used as the molecular weight standard.
- polyester resin (A) used in the present invention is a synthesis example of the polyester resin (A) used in the present invention.
- the glass transition temperature was 35 ° C.
- the acid value was 150 eq / 10 6 g
- the number average molecular weight was 14,200.
- the pressure in the system was reduced to 5 mmHg over 20 minutes, and the temperature was further increased to 250°C.
- the pressure was reduced to 0.3 mmHg or less, and a polycondensation reaction was carried out for 60 minutes, after which the system was cooled to 220°C, and 0.79 parts of trimellitic anhydride was added, reacted for 30 minutes, and then taken out.
- the liquid containing the resin was centrifuged to separate and purify the acid-modified propylene-butene copolymer in which maleic anhydride was graft-polymerized, (poly)maleic anhydride, and low molecular weight substances. Thereafter, the mixture was dried under reduced pressure at 70 ° C. for 5 hours to obtain a maleic anhydride-modified propylene-butene copolymer (e1).
- the acid value was 338 eq / 10 6 g
- the number average molecular weight was 25,000
- the melting point was 80 ° C.
- EP-3950E (N,N,O-triglycidyl-p-aminophenol, manufactured by ADEKA Corporation)
- TETRAD X (N,N,N',N'-tetraglycidyl-m-xylylenediamine, manufactured by Mitsubishi Gas Chemical Company, Inc.)
- jER604 (N,N,N',N'-tetraglycidyl-(4,4'-methylenebisaniline), manufactured by Mitsubishi Chemical Corporation)
- YDCN-700-10 (cresol novolac epoxy, manufactured by Nippon Steel Chemical & Material Co., Ltd.)
- the following flame retardants were used: Exolit (registered trademark) OP-930: (organophosphinic acid metal salt, Clariant)
- BCA (organophosphorus compound, 9,10-dihydro-10-benzyl-9-oxa-10-phosphaphen
- Example 1 40 parts by mass of the copolymerized polyester (a1) obtained in the above synthesis example was dissolved in toluene to prepare a toluene varnish having a solid content concentration of 40% by mass.
- EP-3950E and TETRAD X as curing agents and Exolit OP930 as an organic phosphinic acid metal salt were mixed into this varnish in amounts of 2 parts by mass, 1 part by mass, and 10 parts by mass, respectively, per 100 parts by mass of the polyester resin (a1), to obtain an adhesive composition (F1).
- the adhesive composition (F1) thus obtained was evaluated for adhesion, solder heat resistance, resin flow, flame retardancy, and long-term heat resistance. The results are shown in Table 1.
- Adhesive compositions (F2) to (F16) were prepared and evaluated in the same manner as in Example 1, except that the types and amounts of the polyester resin (A) and epoxy resin (B) were changed as shown in Table 1. The results are shown in Table 1.
- Adhesiveness peel strength
- the adhesive composition was applied to one side of a 12.5 ⁇ m thick polyimide film (Apical (registered trademark) manufactured by Kaneka Corporation) so that the thickness after drying was 25 ⁇ m, and dried at 130 ° C for 3 minutes.
- the adhesive film (B stage product) obtained in this way was laminated with a rolled copper foil (ESPANEX series manufactured by Nippon Steel Chemical & Material Co., Ltd.) having a thickness of 18 ⁇ m.
- the laminate was pressed at 170 ° C under a pressure of 2 MPa for 280 seconds so that the glossy side of the rolled copper foil was in contact with the adhesive layer, and the adhesive was bonded.
- the adhesive composition was applied to one side of a 12.5 ⁇ m thick polyimide film (Apical (registered trademark), manufactured by Kaneka Corporation) so that the thickness after drying was 25 ⁇ m, and dried at 130 ° C for 3 minutes.
- the adhesive film (B stage product) obtained in this manner was laminated to a substrate in which a circuit was formed at a pitch of 100 ⁇ m on a rolled copper foil (ESPANEX series, manufactured by Nippon Steel Chemical & Material Co., Ltd.) having a thickness of 18 ⁇ m.
- the lamination was performed by pressing for 280 seconds at 170 ° C under a pressure of 2 MPa so that the circuit surface was in contact with the adhesive layer.
- the amount of adhesive flowing out from the lamination surface along the circuit was measured with a microscope.
- the circuit embedding property and resin flow suppression were evaluated by this test. If the measured value is less than 0.050 mm, the circuit embedding property is not satisfactory. Also, if the measured value is 1.00 mm or more, the resin flow is excessive.
- ⁇ Evaluation criteria> ⁇ : 0.10 mm or more and less than 0.30 mm ⁇ : 0.050 mm or more and less than 0.10 mm or 0.30 mm or more and less than 0.50 mm ⁇ : 0.50 mm or more and less than 1.00 mm ⁇ : Less than 0.050 mm or 1.00 mm or more
- the adhesive composition was applied to both sides of a 12.5 ⁇ m thick polyimide film (Apical 12.5NPI, manufactured by Kaneka Corporation) so that the thickness after drying would be 16 ⁇ m, and the film was dried at 130° C. for 3 minutes in a fan oven, and then heated and cured at 170° C. for 3 hours to prepare a sample. Flame retardancy was evaluated in accordance with the UL-94 VTM flame retardancy standard. ⁇ Evaluation criteria> ⁇ : Equivalent to UL94 VTM-0. ⁇ : Does not satisfy UL94 VTM-0.
- the adhesive composition was applied to one side of a 12.5 ⁇ m thick polyimide film (Apical (registered trademark) manufactured by Kaneka Corporation) so that the thickness after drying was 25 ⁇ m, and dried at 130 ° C for 3 minutes.
- the adhesive film (B stage product) obtained in this manner was laminated with a rolled copper foil (ESPANEX series manufactured by Nippon Steel Chemical & Material Co., Ltd.) having a thickness of 18 ⁇ m.
- the laminate was pressed for 280 seconds at 170 ° C under a pressure of 2 MPa so that the glossy side of the rolled copper foil was in contact with the adhesive layer, and the adhesive was bonded.
- the laminate was then heat-treated at 170 ° C for 3 hours to harden the film, and a peel strength evaluation sample was obtained.
- the sample was left in an oven at 150 ° C in an air atmosphere for 1000 hours, and the peel strength after 1000 hours was measured.
- the peel strength was measured under the conditions of 25 ° C, film pulling, tensile speed 50 mm / min, and 90 ° peeling. This test shows the long-term reliability of the adhesive strength.
- ⁇ Evaluation criteria> ⁇ : 0.5 N/mm or more ⁇ : 0.2 N/mm or more, less than 0.5 N/mm ⁇ : less than 0.2 N/mm
- Examples 1 to 9 are adhesive compositions containing polyester resin (A) and at least two kinds of epoxy resin (b) having nitrogen atoms, one of the two kinds being (b1) and the other being (b2) or one being (b3) and the other being (b4), and all of them are excellent in adhesion, solder heat resistance, and long-term heat resistance, and also satisfy circuit embedding and resin flow suppression.
- the adhesive compositions of Comparative Examples 1 to 3 cannot satisfy circuit embedding and resin flow suppression because only one kind of epoxy resin (b) having nitrogen atoms is used, and Comparative Example 4 cannot satisfy long-term heat resistance because it uses cresol novolac type epoxy resin as epoxy resin (B) and does not use epoxy resin (b) having nitrogen atoms.
- Comparative Example 5 does not contain epoxy resin (B), so it is not satisfactory except for the evaluation of flame retardancy, Comparative Example 6 uses polyamideimide instead of polyester resin (A), and Comparative Example 7 uses acid-modified polypropylene, so it cannot satisfy long-term heat resistance.
- Comparative Examples 1 to 7 were unable to simultaneously satisfy all of the following characteristics: adhesion, solder heat resistance, long-term heat resistance, circuit embedding ability, and resin flow inhibition.
- the adhesive composition of the present invention has excellent adhesion and solder heat resistance, and also exhibits long-term heat resistance. It also has good circuit embedding properties while suppressing excessive resin flow, making it useful as an adhesive for FPCs in automotive applications.
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
L'invention concerne une composition adhésive qui présente une excellente adhérence et une excellente résistance à la chaleur de soudure, exerce une excellente adhérence même après avoir été exposée à des températures élevées pendant une longue période de temps, et présente une bonne aptitude à l'incorporation de circuit tout en supprimant un écoulement de résine excessif, et une feuille adhésive, un corps stratifié et une carte de circuit imprimé contenant la composition adhésive. La composition adhésive contient une résine de polyester (A) et une résine époxy (B) ; la résine époxy (B) contient au moins deux types de résines époxy (b) ayant des atomes d'azote ; et l'un des deux types est la résine époxy suivante (b1) et l'autre est la résine époxy suivante (b2). (b1) Une résine ayant une fonctionnalité inférieure ou égale à 3. (b2) Une résine ayant une fonctionnalité de 4 ou plus.
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014141603A (ja) * | 2013-01-25 | 2014-08-07 | Toyo Ink Sc Holdings Co Ltd | 誘電特性に優れる接着剤組成物、それを用いた接着剤シート、およびプリント配線板 |
JP2019038929A (ja) * | 2017-08-24 | 2019-03-14 | 東洋インキScホールディングス株式会社 | 接着剤組成物、積層体、包装用積層体、および包装用容器 |
JP2022051543A (ja) * | 2020-09-18 | 2022-03-31 | 三菱ケミカル株式会社 | ポリエステル系樹脂、接着剤組成物及び接着剤 |
JP7120498B1 (ja) * | 2021-03-16 | 2022-08-17 | 東洋紡株式会社 | 接着剤組成物、ならびにこれを含有する接着シート、積層体およびプリント配線板 |
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- 2023-10-17 WO PCT/JP2023/037559 patent/WO2024090291A1/fr unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014141603A (ja) * | 2013-01-25 | 2014-08-07 | Toyo Ink Sc Holdings Co Ltd | 誘電特性に優れる接着剤組成物、それを用いた接着剤シート、およびプリント配線板 |
JP2019038929A (ja) * | 2017-08-24 | 2019-03-14 | 東洋インキScホールディングス株式会社 | 接着剤組成物、積層体、包装用積層体、および包装用容器 |
JP2022051543A (ja) * | 2020-09-18 | 2022-03-31 | 三菱ケミカル株式会社 | ポリエステル系樹脂、接着剤組成物及び接着剤 |
JP7120498B1 (ja) * | 2021-03-16 | 2022-08-17 | 東洋紡株式会社 | 接着剤組成物、ならびにこれを含有する接着シート、積層体およびプリント配線板 |
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