WO2023276814A1 - エポキシ樹脂組成物、半導体装置および半導体装置の製造方法 - Google Patents
エポキシ樹脂組成物、半導体装置および半導体装置の製造方法 Download PDFInfo
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- WO2023276814A1 WO2023276814A1 PCT/JP2022/024883 JP2022024883W WO2023276814A1 WO 2023276814 A1 WO2023276814 A1 WO 2023276814A1 JP 2022024883 W JP2022024883 W JP 2022024883W WO 2023276814 A1 WO2023276814 A1 WO 2023276814A1
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- Prior art keywords
- epoxy resin
- resin composition
- ionic compound
- imide
- bis
- Prior art date
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- 150000001450 anions Chemical class 0.000 claims abstract description 13
- -1 sulfonylimide anions Chemical class 0.000 claims description 46
- ZXMGHDIOOHOAAE-UHFFFAOYSA-N 1,1,1-trifluoro-n-(trifluoromethylsulfonyl)methanesulfonamide Chemical compound FC(F)(F)S(=O)(=O)NS(=O)(=O)C(F)(F)F ZXMGHDIOOHOAAE-UHFFFAOYSA-N 0.000 claims description 42
- 239000002245 particle Substances 0.000 claims description 41
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- SNDRYHUSDCHSDJ-UHFFFAOYSA-N tributyl(dodecyl)phosphanium Chemical compound CCCCCCCCCCCC[P+](CCCC)(CCCC)CCCC SNDRYHUSDCHSDJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000000654 additive Substances 0.000 claims description 14
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 14
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 11
- ZUZLIXGTXQBUDC-UHFFFAOYSA-N methyltrioctylammonium Chemical compound CCCCCCCC[N+](C)(CCCCCCCC)CCCCCCCC ZUZLIXGTXQBUDC-UHFFFAOYSA-N 0.000 claims description 11
- XYFCBTPGUUZFHI-UHFFFAOYSA-O phosphonium Chemical compound [PH4+] XYFCBTPGUUZFHI-UHFFFAOYSA-O 0.000 claims description 11
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- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 8
- 239000011258 core-shell material Substances 0.000 claims description 8
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 7
- RAXXELZNTBOGNW-UHFFFAOYSA-O Imidazolium Chemical compound C1=C[NH+]=CN1 RAXXELZNTBOGNW-UHFFFAOYSA-O 0.000 claims description 7
- NQRYJNQNLNOLGT-UHFFFAOYSA-O Piperidinium(1+) Chemical compound C1CC[NH2+]CC1 NQRYJNQNLNOLGT-UHFFFAOYSA-O 0.000 claims description 7
- RWRDLPDLKQPQOW-UHFFFAOYSA-O Pyrrolidinium ion Chemical compound C1CC[NH2+]C1 RWRDLPDLKQPQOW-UHFFFAOYSA-O 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 7
- JUJWROOIHBZHMG-UHFFFAOYSA-O pyridinium Chemical compound C1=CC=[NH+]C=C1 JUJWROOIHBZHMG-UHFFFAOYSA-O 0.000 claims description 7
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 6
- YRIUSKIDOIARQF-UHFFFAOYSA-N dodecyl benzenesulfonate Chemical group CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 YRIUSKIDOIARQF-UHFFFAOYSA-N 0.000 claims description 6
- 229940071161 dodecylbenzenesulfonate Drugs 0.000 claims description 6
- 229910052740 iodine Inorganic materials 0.000 claims description 6
- 239000011630 iodine Substances 0.000 claims description 6
- MEIYSIFLALTFBG-UHFFFAOYSA-N 4-(2-ethoxyethyl)-4-methylmorpholin-4-ium Chemical compound CCOCC[N+]1(C)CCOCC1 MEIYSIFLALTFBG-UHFFFAOYSA-N 0.000 claims description 5
- JHUSFNHAIQTNCR-UHFFFAOYSA-M 4-methylbenzenesulfonate;methyl(trioctyl)azanium Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1.CCCCCCCC[N+](C)(CCCCCCCC)CCCCCCCC JHUSFNHAIQTNCR-UHFFFAOYSA-M 0.000 claims description 5
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 5
- SIIMROTZKDKRFD-KHPPLWFESA-N bis(2-hydroxyethyl)-methyl-[(z)-octadec-9-enyl]azanium Chemical compound CCCCCCCC\C=C/CCCCCCCC[N+](C)(CCO)CCO SIIMROTZKDKRFD-KHPPLWFESA-N 0.000 claims description 5
- 150000003949 imides Chemical class 0.000 claims description 5
- PXELHGDYRQLRQO-UHFFFAOYSA-N 1-butyl-1-methylpyrrolidin-1-ium Chemical compound CCCC[N+]1(C)CCCC1 PXELHGDYRQLRQO-UHFFFAOYSA-N 0.000 claims description 4
- YQVWRENWRRGCAE-UHFFFAOYSA-N 1-butyl-3-dodecylimidazol-3-ium Chemical compound CCCCCCCCCCCC[N+]=1C=CN(CCCC)C=1 YQVWRENWRRGCAE-UHFFFAOYSA-N 0.000 claims description 4
- KVUBRTKSOZFXGX-UHFFFAOYSA-N 1-hexyl-4-methylpyridin-1-ium Chemical compound CCCCCC[N+]1=CC=C(C)C=C1 KVUBRTKSOZFXGX-UHFFFAOYSA-N 0.000 claims description 4
- CDAWCLOXVUBKRW-UHFFFAOYSA-N 2-aminophenol Chemical compound NC1=CC=CC=C1O CDAWCLOXVUBKRW-UHFFFAOYSA-N 0.000 claims description 4
- GSBKRFGXEJLVMI-UHFFFAOYSA-N Nervonyl carnitine Chemical compound CCC[N+](C)(C)C GSBKRFGXEJLVMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000004305 biphenyl Substances 0.000 claims description 4
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- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- HJHUXWBTVVFLQI-UHFFFAOYSA-N tributyl(methyl)azanium Chemical compound CCCC[N+](C)(CCCC)CCCC HJHUXWBTVVFLQI-UHFFFAOYSA-N 0.000 claims description 4
- QLNOVKKVHFRGMA-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical group [CH2]CC[Si](OC)(OC)OC QLNOVKKVHFRGMA-UHFFFAOYSA-N 0.000 claims description 4
- WICQXESQFGXSKV-UHFFFAOYSA-N disulfuryl fluoride Chemical compound FS(=O)(=O)OS(F)(=O)=O WICQXESQFGXSKV-UHFFFAOYSA-N 0.000 claims description 3
- 239000002608 ionic liquid Substances 0.000 claims description 3
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 24
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 19
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- 235000010724 Wisteria floribunda Nutrition 0.000 description 7
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 7
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- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
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- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000006087 Silane Coupling Agent Substances 0.000 description 4
- 150000008065 acid anhydrides Chemical class 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 4
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- TYOXIFXYEIILLY-UHFFFAOYSA-N 5-methyl-2-phenyl-1h-imidazole Chemical compound N1C(C)=CN=C1C1=CC=CC=C1 TYOXIFXYEIILLY-UHFFFAOYSA-N 0.000 description 3
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- 229920006243 acrylic copolymer Polymers 0.000 description 3
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- PUZYNDBTWXJXKN-UHFFFAOYSA-M tetraethylazanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.CC[N+](CC)(CC)CC PUZYNDBTWXJXKN-UHFFFAOYSA-M 0.000 description 3
- WWVMHGUBIOZASN-UHFFFAOYSA-N 1-methyl-3-prop-2-enylimidazol-1-ium Chemical compound CN1C=C[N+](CC=C)=C1 WWVMHGUBIOZASN-UHFFFAOYSA-N 0.000 description 2
- PISLZQACAJMAIO-UHFFFAOYSA-N 2,4-diethyl-6-methylbenzene-1,3-diamine Chemical compound CCC1=CC(C)=C(N)C(CC)=C1N PISLZQACAJMAIO-UHFFFAOYSA-N 0.000 description 2
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 2
- CBEVWPCAHIAUOD-UHFFFAOYSA-N 4-[(4-amino-3-ethylphenyl)methyl]-2-ethylaniline Chemical compound C1=C(N)C(CC)=CC(CC=2C=C(CC)C(N)=CC=2)=C1 CBEVWPCAHIAUOD-UHFFFAOYSA-N 0.000 description 2
- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 description 2
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 2
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- 230000002776 aggregation Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- CGNMFVSTZLKCNN-UHFFFAOYSA-N bis(trifluoromethylsulfonyl)azanide 1-hexyl-4-methylpyridin-1-ium Chemical compound CCCCCC[n+]1ccc(C)cc1.FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F CGNMFVSTZLKCNN-UHFFFAOYSA-N 0.000 description 2
- HSLXOARVFIWOQF-UHFFFAOYSA-N bis(trifluoromethylsulfonyl)azanide;1-butyl-1-methylpyrrolidin-1-ium Chemical compound CCCC[N+]1(C)CCCC1.FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F HSLXOARVFIWOQF-UHFFFAOYSA-N 0.000 description 2
- XALVHDZWUBSWES-UHFFFAOYSA-N bis(trifluoromethylsulfonyl)azanide;tributyl(methyl)azanium Chemical compound CCCC[N+](C)(CCCC)CCCC.FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F XALVHDZWUBSWES-UHFFFAOYSA-N 0.000 description 2
- NFLGAVZONHCOQE-UHFFFAOYSA-N bis(trifluoromethylsulfonyl)azanide;trimethyl(propyl)azanium Chemical compound CCC[N+](C)(C)C.FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F NFLGAVZONHCOQE-UHFFFAOYSA-N 0.000 description 2
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- JDRIIKLOBAZQQE-UHFFFAOYSA-M dibutyl phosphate;tributyl(methyl)azanium Chemical compound CCCCOP([O-])(=O)OCCCC.CCCC[N+](C)(CCCC)CCCC JDRIIKLOBAZQQE-UHFFFAOYSA-M 0.000 description 2
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 2
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- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
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- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
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- MCZDHTKJGDCTAE-UHFFFAOYSA-M tetrabutylazanium;acetate Chemical compound CC([O-])=O.CCCC[N+](CCCC)(CCCC)CCCC MCZDHTKJGDCTAE-UHFFFAOYSA-M 0.000 description 2
- 125000005490 tosylate group Chemical group 0.000 description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 2
- LAGQNGWYNLUQRI-UHFFFAOYSA-N trioctylmethylammonium bis(trifluoromethylsulfonyl)imide Chemical compound FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F.CCCCCCCC[N+](C)(CCCCCCCC)CCCCCCCC LAGQNGWYNLUQRI-UHFFFAOYSA-N 0.000 description 2
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 2
- LJCJRRKKAKAKRV-UHFFFAOYSA-N (2-amino-2-methylpropyl) 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical group CC(C)(N)COC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 LJCJRRKKAKAKRV-UHFFFAOYSA-N 0.000 description 1
- LTVUCOSIZFEASK-MPXCPUAZSA-N (3ar,4s,7r,7as)-3a-methyl-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione Chemical class C([C@H]1C=C2)[C@H]2[C@H]2[C@]1(C)C(=O)OC2=O LTVUCOSIZFEASK-MPXCPUAZSA-N 0.000 description 1
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- LPVHVQFTYXQKAP-YFKPBYRVSA-N (4r)-3-formyl-2,2-dimethyl-1,3-thiazolidine-4-carboxylic acid Chemical compound CC1(C)SC[C@@H](C(O)=O)N1C=O LPVHVQFTYXQKAP-YFKPBYRVSA-N 0.000 description 1
- VECGWISURDHBJL-UHFFFAOYSA-M 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate;tetrabutylazanium Chemical compound CCCC[N+](CCCC)(CCCC)CCCC.[O-]S(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F VECGWISURDHBJL-UHFFFAOYSA-M 0.000 description 1
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
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- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
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- LCZRPQGSMFXSTC-UHFFFAOYSA-M 1-butyl-1-methylpyrrolidin-1-ium;bromide Chemical compound [Br-].CCCC[N+]1(C)CCCC1 LCZRPQGSMFXSTC-UHFFFAOYSA-M 0.000 description 1
- BOOXKGZZTBKJFE-UHFFFAOYSA-M 1-butyl-1-methylpyrrolidin-1-ium;chloride Chemical compound [Cl-].CCCC[N+]1(C)CCCC1 BOOXKGZZTBKJFE-UHFFFAOYSA-M 0.000 description 1
- LBHLGZNUPKUZJC-UHFFFAOYSA-N 1-butyl-1-methylpyrrolidin-1-ium;cyanoiminomethylideneazanide Chemical compound [N-]=C=NC#N.CCCC[N+]1(C)CCCC1 LBHLGZNUPKUZJC-UHFFFAOYSA-N 0.000 description 1
- BEZANEDYKZXSCF-UHFFFAOYSA-M 1-butyl-1-methylpyrrolidin-1-ium;iodide Chemical compound [I-].CCCC[N+]1(C)CCCC1 BEZANEDYKZXSCF-UHFFFAOYSA-M 0.000 description 1
- WZJDNKTZWIOOJE-UHFFFAOYSA-M 1-butyl-1-methylpyrrolidin-1-ium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.CCCC[N+]1(C)CCCC1 WZJDNKTZWIOOJE-UHFFFAOYSA-M 0.000 description 1
- BSKSXTBYXTZWFI-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;acetate Chemical compound CC([O-])=O.CCCC[N+]=1C=CN(C)C=1 BSKSXTBYXTZWFI-UHFFFAOYSA-M 0.000 description 1
- KYCQOKLOSUBEJK-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;bromide Chemical compound [Br-].CCCCN1C=C[N+](C)=C1 KYCQOKLOSUBEJK-UHFFFAOYSA-M 0.000 description 1
- FHDQNOXQSTVAIC-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;chloride Chemical compound [Cl-].CCCCN1C=C[N+](C)=C1 FHDQNOXQSTVAIC-UHFFFAOYSA-M 0.000 description 1
- ICIVTHOGIQHZRY-UHFFFAOYSA-N 1-butyl-3-methylimidazol-3-ium;cyanoiminomethylideneazanide Chemical compound [N-]=C=NC#N.CCCCN1C=C[N+](C)=C1 ICIVTHOGIQHZRY-UHFFFAOYSA-N 0.000 description 1
- NTXQJRGQUZXUMU-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;dibutyl phosphate Chemical compound CCCC[N+]=1C=CN(C)C=1.CCCCOP([O-])(=O)OCCCC NTXQJRGQUZXUMU-UHFFFAOYSA-M 0.000 description 1
- UWVZAZVPOZTKNM-UHFFFAOYSA-M 1-butyl-4-methylpyridin-1-ium;bromide Chemical compound [Br-].CCCC[N+]1=CC=C(C)C=C1 UWVZAZVPOZTKNM-UHFFFAOYSA-M 0.000 description 1
- YTSDTJNDMGOTFN-UHFFFAOYSA-M 1-butyl-4-methylpyridin-1-ium;chloride Chemical compound [Cl-].CCCC[N+]1=CC=C(C)C=C1 YTSDTJNDMGOTFN-UHFFFAOYSA-M 0.000 description 1
- RSJCFBORABJFGA-UHFFFAOYSA-M 1-butyl-4-methylpyridin-1-ium;iodide Chemical compound [I-].CCCC[N+]1=CC=C(C)C=C1 RSJCFBORABJFGA-UHFFFAOYSA-M 0.000 description 1
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- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- VMJQVRWCDVLJSI-UHFFFAOYSA-M tetraheptylazanium;chloride Chemical compound [Cl-].CCCCCCC[N+](CCCCCCC)(CCCCCCC)CCCCCCC VMJQVRWCDVLJSI-UHFFFAOYSA-M 0.000 description 1
- AYEKOFBPNLCAJY-UHFFFAOYSA-O thiamine pyrophosphate Chemical compound CC1=C(CCOP(O)(=O)OP(O)(O)=O)SC=[N+]1CC1=CN=C(C)N=C1N AYEKOFBPNLCAJY-UHFFFAOYSA-O 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 description 1
- RJELOMHXBLDMDB-UHFFFAOYSA-M trihexyl(tetradecyl)phosphanium;bromide Chemical compound [Br-].CCCCCCCCCCCCCC[P+](CCCCCC)(CCCCCC)CCCCCC RJELOMHXBLDMDB-UHFFFAOYSA-M 0.000 description 1
- JCQGIZYNVAZYOH-UHFFFAOYSA-M trihexyl(tetradecyl)phosphanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCC[P+](CCCCCC)(CCCCCC)CCCCCC JCQGIZYNVAZYOH-UHFFFAOYSA-M 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
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/19—Quaternary ammonium compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3415—Five-membered rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/35—Heterocyclic compounds having nitrogen in the ring having also oxygen in the ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
- H01L21/563—Encapsulation of active face of flip-chip device, e.g. underfilling or underencapsulation of flip-chip, encapsulation preform on chip or mounting substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
- H01L23/295—Organic, e.g. plastic containing a filler
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
Definitions
- the present invention relates to an epoxy resin composition, a semiconductor device, and a method for manufacturing a semiconductor device.
- Flip-chip mounting is known as a technique for mounting semiconductor elements on substrates.
- Flip-chip mounting uses a semiconductor element with protruding electrodes (element-side electrodes) called bumps formed on its surface. It is a mounting method that directly connects the electrodes.
- an underfill is filled between the semiconductor element and the substrate, and then cured by heating.
- an epoxy resin composition containing epoxy resin as a main component is mainly used (see Patent Document 1, for example).
- the epoxy resin, the semiconductor element, and the substrate each have different coefficients of linear expansion. Therefore, if the sealing material (hardened underfill) that covers the electrode connection portion cannot absorb the stress generated at the electrode connection portion between the element-side electrode and the substrate-side electrode due to the temperature change, the connection portion may be damaged. Cracks may occur in the In order to suppress the occurrence of cracks, the underfill usually contains a filler made of silica, alumina, or the like, which has a relatively small linear expansion coefficient, in addition to the epoxy resin.
- the epoxy resin composition contains 0.1 to 10% by mass of a first silica filler having an average particle size of 10 nm to 100 nm and a second silica filler having an average particle size of 0.3 ⁇ m to 2 ⁇ m. It contains 47 to 75% by mass of silica filler, 0.1 to 8% by mass of elastomer, and 50.1 to 77% by mass of first silica filler and second silica filler in total.
- Patent Document 2 The technology described in Patent Document 2 is a useful technology for improving connection reliability.
- it is necessary to use two types of silica filler having a predetermined particle size and an elastomer in predetermined amounts in order to improve connection reliability.
- Design has certain constraints. Therefore, as with the technique described in Patent Document 2, it is desired to expand the options for composition design in order to improve connection reliability and more easily meet other various needs.
- the present invention has been made in view of the above circumstances, and an epoxy resin composition having a novel composition capable of suppressing uneven distribution of filler dispersed in a sealing material (cured product) covering an electrode connection portion. , a semiconductor device manufactured using the same, and a method for manufacturing the semiconductor device.
- the epoxy resin composition of the present invention is characterized by containing (A) an epoxy resin, (B) a curing agent, (C) a filler, and (D) an ionic compound.
- the (D) ionic compound is a pyridinium-based ionic compound, an imidazolium-based ionic compound, an ammonium-based ionic compound, a phosphonium-based ionic compound, a pyrrolidinium-based ion. preferably contains at least one selected from the group consisting of ionic compounds, piperidinium-based ionic compounds, sulfonate-based ionic compounds, and iodine-based ionic compounds.
- the (D) ionic compound is ⁇ i> a pyridinium-based cation, an imidazolium-based cation, an ammonium-based cation, a pyrrolidinium-based cation, a piperidinium-based cation, and a phosphonium-based cation.
- the (D) ionic compound is preferably an ionic liquid.
- the (D) ionic compound preferably has a reactive group.
- the content ratio of the ionic compound (D) is 0.0001% by mass to 3.1% by mass with respect to the total amount of the epoxy resin composition. preferable.
- the content ratio of the ionic compound (D) is 0.001% by mass or more and 1.2% by mass or less with respect to the total amount of the epoxy resin composition. is preferred.
- the (A) epoxy resin preferably contains a liquid epoxy resin.
- the epoxy resin (A) is a bisphenol F type epoxy resin, a bisphenol A type epoxy resin, a biphenyl type epoxy resin, an aminophenol type epoxy resin, and a naphthalene type epoxy resin. It preferably contains at least one selected from the group consisting of resins.
- Another embodiment of the epoxy resin composition of the present invention contains (C1) a large-diameter filler having an average particle diameter of 0.2 ⁇ m or more as the (C) filler, and the content ratio of the (C1) large-diameter filler is preferably 35% by mass to 70% by mass with respect to the total amount of the epoxy resin composition.
- the (C1) large-diameter filler has an average particle size of 0.2 to 3.0 ⁇ m.
- Another embodiment of the epoxy resin composition of the present invention contains (C2) a small-diameter filler having an average particle diameter of less than 0.2 ⁇ m as the (C) filler, and the (C2) small-diameter filler has an average particle diameter of It is preferably between 5 nm and 120 nm.
- Another embodiment of the epoxy resin composition of the present invention further contains (E) an additive, and preferably contains core-shell rubber particles as the (E) additive.
- Another embodiment of the epoxy resin composition of the present invention is preferably used as a sealing material for semiconductor devices.
- a semiconductor device of the present invention comprises a substrate, a semiconductor element arranged on the substrate, a cured product of the epoxy resin composition of the present invention sealing a gap between the semiconductor element and the substrate, characterized by comprising
- the method for manufacturing a semiconductor device of the present invention comprises the steps of: filling a gap between a substrate and a semiconductor element arranged on the substrate with the epoxy resin composition of the present invention; and curing the epoxy resin composition. and a step.
- an epoxy resin composition having a novel composition capable of suppressing biased distribution of filler dispersed in a sealing material (hardened material) covering an electrode connection portion, and a semiconductor produced using the same.
- a device and a method for manufacturing the semiconductor device can be provided.
- FIG. 1 is a cross-sectional view showing an example of a cross-sectional structure of a semiconductor device
- the epoxy resin composition of the present embodiment contains (A) an epoxy resin, (B) a curing agent, (C) a filler, and (D) an ionic compound in which at least one of cations and anions is an organic substance. It is characterized by Therefore, when the epoxy resin composition is filled between an electronic element such as a semiconductor element and a substrate during flip-chip mounting and then cured by heating, the epoxy resin composition of the present embodiment can be used as the epoxy resin composition. , it is possible to suppress uneven distribution of the filler dispersed in the sealing material (hardened material) covering the electrode connecting portion. Therefore, it is easy to obtain semiconductor devices and other electronic devices with high connection reliability. Although the details of the reason why such an effect is obtained are unknown, the present inventors presume that the reason is as follows.
- a potential difference occurs at and near the connection interface of the electrode connection portion between the element-side electrode and the substrate-side electrode, where the metal material forming the element-side electrode connection surface and the metal material forming the substrate-side electrode connection surface are different from each other.
- the charged filler contained in the epoxy resin composition filled around the electrode connecting portion moves toward either the semiconductor element side or the substrate side by electrophoresis. easy to move to.
- the distribution of the filler dispersed in the sealing material (hardened material) covering the electrode connecting portion tends to be uneven.
- the charge of the filler is released to the outside through the conductive ionic compound.
- the filler with a reduced amount of charge becomes difficult to move to either the semiconductor element side or the substrate side. For this reason, it is thought that uneven distribution of the filler dispersed in the sealing material (hardened material) covering the electrode connecting portion can be suppressed.
- the epoxy resin composition of the present embodiment is particularly suitable for use as an underfill used when manufacturing a semiconductor device by flip-chip mounting using a metal pillar as an electrode member.
- the epoxy resin composition of the present embodiment is Of course, it can also be used in the manufacture of semiconductor devices manufactured by mounting methods other than flip-chip mounting using metal pillars, and in the manufacture of various electronic devices other than semiconductor devices. Next, details of each component constituting the epoxy resin composition of the present embodiment will be described below.
- Epoxy resin used in the epoxy resin composition of the present embodiment is not particularly limited as long as it is a variety of epoxy resins generally used for semiconductor encapsulation, but from the viewpoint of viscosity and injectability. It is preferable to use a liquid epoxy resin. Moreover, as the epoxy resin blended in the epoxy resin composition, only one type of epoxy resin may be used, or two or more types of epoxy resins may be used in combination. The number of epoxy groups contained in the epoxy resin (one molecule) may be 1 or more, but usually 2 or more is preferable. Although the upper limit of the number of epoxy groups is not particularly limited, it is usually preferably 5 or less.
- the epoxy resin may be various epoxy resins generally used for semiconductor encapsulation, and is not particularly limited.
- epoxy resins typically include aliphatic epoxy resins and aromatic epoxy resins, with aromatic epoxy resins being preferred.
- aromatic epoxy resins include bisphenol A type epoxy resins such as p-glycidyloxyphenyldimethyltrisbisphenol A diglycidyl ether; bisphenol F type epoxy resins; novolac type epoxy resins; fluorene type epoxy resins; Diepoxy resins such as p-tert-butylphenyl glycidyl ether, 1,4-phenyldimethanol diglycidyl ether; 3,3′,5,5′-tetramethyl-4,4′-diglycidyloxybiphenyl such as biphenyl-type epoxy resins; aminophenol-type epoxy resins such as diglycidylaniline, diglycidyltoluidine, triglycidyl-p-aminophenol, tetraglycidyl-m-xylylenediamine; naphthalene-type epoxy resins
- bisphenol F type epoxy resin bisphenol A type epoxy resin, biphenyl type epoxy resin, aminophenol type epoxy resin, and naphthalene type epoxy resin are suitable.
- the curing agent used in the epoxy resin composition of the present embodiment is not particularly limited as long as it is a commonly used various curing agent.
- the amount of the curing agent is preferably such that the stoichiometric equivalent ratio (curing agent equivalent/epoxy group equivalent) to the epoxy resin is 0.6 to 1.5, more preferably 0.7 to 1.5. A quantity of 2 is more preferred.
- curing agents examples include amine-based curing agents, acid anhydride-based curing agents, and phenol-based curing agents.
- amine-based curing agents examples include amine-based curing agents, acid anhydride-based curing agents, and phenol-based curing agents.
- phenol-based curing agents examples include phenol-based curing agents.
- a curing agent blended in the epoxy resin composition only one type of curing agent may be used, or two or more types of curing agents may be used in combination.
- amine-based curing agents include aliphatic polyamines such as triethylenetetramine, tetraethylenepentamine, m-xylenediamine, trimethylhexamethylenediamine, and 2-methylpentamethylenediamine, isophoronediamine, 1,3- Alicyclic polyamines such as bisaminomethylcyclohexane, bis(4-aminocyclohexyl)methane, norbornenediamine, 1,2-diaminocyclohexane, N-aminoethylpiperazine, 1,4-bis(2-amino-2-methylpropyl ) piperazine-type polyamines such as piperazine, diethyltoluenediamine, dimethylthiotoluenediamine, 4,4′-diamino-3,3′-diethyldiphenylmethane, bis(methylthio)toluenediamine, diaminodiphenylmethane, m-
- acid anhydride curing agents include alkylated tetrahydrophthalic anhydrides such as methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, and methyltetrahydrophthalic anhydride, hexahydrophthalic anhydride, Examples thereof include methylhimic anhydride, alkenyl-substituted succinic anhydride, methylnadic anhydride, and glutaric anhydride.
- phenol-based curing agents include monomers, oligomers, and polymers having phenolic hydroxyl groups, such as phenol novolak resins and their alkylated or allylated products, cresol novolak resins, phenol aralkyls (including phenylene and biphenylene skeletons). ) resin, naphthol aralkyl resin, triphenolmethane resin, dicyclopentadiene type phenol resin, and the like.
- thermal cycle resistance is improved by mainly reducing the linear expansion coefficient of the sealed portion (cured product), and moisture resistance is improved.
- a filler is blended from such a viewpoint.
- the filler is not particularly limited as long as it has the effect of reducing the linear expansion coefficient of the cured product, and known fillers can be used as appropriate.
- alumina fillers and silica fillers can be used.
- the filler may be surface-treated with a silane coupling agent or the like.
- the epoxy resin composition of the present embodiment usually contains at least filler particles having an average particle diameter of 0.2 ⁇ m or more. It is preferable to blend a filler ((C1) large-diameter filler).
- the average particle size of the large-diameter filler is not particularly limited as long as it is 0.2 ⁇ m or more, but from a practical point of view, it is preferably 0.2 ⁇ m to 3.0 ⁇ m.
- the content ratio of the large-diameter filler blended in the epoxy resin composition is preferably 35% by mass to 70% by mass, more preferably 40% by mass to 69% by mass, relative to the total amount of the epoxy resin composition.
- the content ratio of the large-diameter filler is 35% by mass or more, the coefficient of linear expansion of the cured product becomes smaller, making it easier to improve the thermal cycle resistance.
- the viscosity of the epoxy resin composition becomes lower, which makes it easier to improve the injectability of the epoxy resin composition.
- the epoxy resin composition of the present embodiment further contains a filler having an average particle size of less than 0.2 ⁇ m (200 nm) ((C2) small-diameter filler) in combination with the large-diameter filler.
- a filler having an average particle size of less than 0.2 ⁇ m (200 nm) ((C2) small-diameter filler) in combination with the large-diameter filler.
- the shape of the large-diameter filler is not particularly limited, and may be spherical, amorphous, or scaly.
- the shape of the small-diameter filler is also not particularly limited, and may be spherical, irregular, or scaly.
- the shape of the small-diameter filler produced by wet synthesis is spherical.
- the average particle size of the large-diameter filler is the volume-average particle size D50 measured using a laser diffraction particle size distribution measuring device (LS13320 manufactured by Beckman Coulter) (from the small diameter side of the particle size distribution 50% cumulative particle size) value.
- the average particle size of the small-diameter filler was measured based on the image of the filler taken at a magnification of 100,000 to 1,000,000 times with a field emission scanning electron microscope (FE-SEM) (manufactured by JEOL JSM-7500). value.
- FE-SEM field emission scanning electron microscope
- the particle diameter of the filler means the value obtained by binarizing the image using image processing software (Win ROOF), separating the filler portion as a circle using the circle separation function, and measuring the diameter of the circle. do.
- the epoxy resin composition of the present embodiment contains an ionic compound composed of a cation and an anion, at least one of which is an organic substance.
- a known ionic compound can be used as the ionic compound. It is particularly preferable that at least a part of the ionic compound is soluble in the epoxy resin in the operating temperature range of the epoxy resin composition of the present embodiment.
- “Soluble” means that the amount of the ionic compound contained in the epoxy resin composition dissolved in 100 g of the epoxy resin contained in the epoxy resin composition is 0.0005 g or more at room temperature (25°C). .
- the amount of the ionic compound dissolved in 100 g of the epoxy resin is preferably 0.001 g or more, more preferably 0.003 g or more.
- the melting point of the ionic compound is not particularly limited, but is preferably 250° C. or lower, preferably 100° C. or lower, and more preferably below room temperature (25° C.). Ionic compounds having a melting point of 100° C. or less are known as so-called “ionic liquids”. Although the lower limit of the melting point of the ionic compound is not particularly limited, it is practically preferably -100°C or higher.
- the ionic compound preferably has a reactive group in its molecule.
- reactive groups include trimethylsilyl groups, hydroxyl groups, carboxyl groups, aldehyde groups, hydroxy groups, carboxy groups, nitro groups, amino groups, sulfo groups, methacryl groups and the like.
- the degree of freedom in composition design of the epoxy resin composition of the present embodiment can be increased so as to meet various needs.
- the ionic compound contains a chain-shaped cationic molecule and/or an anionic molecule
- the reactive group is preferably provided at the end of the chain-shaped molecule that constitutes the ionic compound. This makes it easier to fix the ionic compound in the cured body by reacting the ionic compound with the resin matrix that constitutes the cured body when the epoxy resin composition is cured.
- cations and anions that make up the ionic compound various compounds can be used as long as they can make up the ionic compound. It is preferred to utilize cations and anions that do not have a trifluoromethyl group for the purpose of reducing emissions to. More preferred in this case are ionic compounds in which each of the cation and anion is composed of molecules that do not contain a trifluoromethyl group.
- the ionic compounds include pyridinium-based ionic compounds, imidazolium-based ionic compounds, ammonium-based ionic compounds, phosphonium-based ionic compounds, pyrrolidinium-based ionic compounds, piperidinium-based ionic compounds, sulfonate-based ionic compounds, and , iodine-based ionic compounds, and the like can be used.
- the ionic compound is ⁇ i> a group consisting of pyridinium-based cations, imidazolium-based cations, ammonium-based cations, pyrrolidinium-based cations, piperidinium-based cations and phosphonium-based cations.
- pyridinium-based ionic compounds 1-hexyl-4-methylpyridinium bis(trifluoromethanesulfonyl)imide, 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide, 1-butyl-4-methylpyridinium bromide , 1-butyl-4-methylpyridinium chloride, 1-butyl-4-methylpyridinium hexafluorophosphate, 1-butyl-4-methylpyridinium iodide, 4-methyl-N-butylpyridinium tetrafluoroborate, 1- Examples include butylpyridinium bromide, 1-(3-cyanopropyl)pyridinium chloride, 1-ethylpyridinium tetrafluoroborate, and 3-methyl-1-propylpyridinium bis(trifluoromethylsulfonyl)imide.
- imidazolium-based ionic compounds include 1-butyl-3-dodecylimidazolium bis(trifluoromethanesulfonyl)imide, 1-allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-allyl-3- Methylimidazolium bromide, 1-allyl-3-methylimidazolium chloride, 1-allyl-3-methylimidazolium dicyanamide, 1-allyl-3-methylimidazolium iodide, 1-benzyl-3-methylimidazolium chloride , 1-benzyl-3-methylimidazolium hexafluorophosphate, 1-benzyl-3-methylimidazolium tetrafluoroborate, 1,3-bis(cyanomethyl)imidazolium bis(trifluoromethylsulfonyl)imide, 1, 3-bis(cyanomethyl)imidazolium chloride, 1,3-bis(3-cyano
- Ammonium-based ionic compounds include tributylmethylammonium bis(trifluoromethanesulfonyl)imide, trimethylpropylammonium bis(trifluoromethanesulfonyl)imide, 4-(2-ethoxyethyl)-4-methylmorpholinium bis(trifluoromethanesulfonyl) ) imide, butyltrimethylammonium bis(trifluoromethanesulfonyl)imide, ethyldimethylpropylammonium bis(trifluoromethylsulfonyl)imide, 2-hydroxyethyltrimethylammonium lactate, methyl-trioctylammonium bis(trifluoromethylsulfonyl)imide, methyltrioctylammonium thiosalicylate, tetrabutylammonium nonafluorobutanesulfonate, tetraethylammonium tri
- Phosphonium-based ionic compounds include tributyldodecylphosphonium bis(trifluoromethanesulfonyl)imide, tetrabutylphosphonium methanesulfonate, tributylmethylphosphonium dibutylphosphate, tributylmethylphosphonium methylsulfate, triethylmethylphosphonium dibutylphosphate, trihexyltetra Decylphosphonium bis(trifluoromethylsulfonyl)amide, tributyldodecylphosphonium p-toluenesulfonate, trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate, trihexyltetradecylphosphonium bromide, trihexyltetradecylphosphonium chloride, trihexyltetradecylphosphonium decanoate,
- pyrrolidinium-based ionic compounds examples include 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-butyl-1-methylpyrrolidinium bromide, and 1-butyl-1-methylpyrrolidinium chloride.
- piperidinium-based ionic compounds examples include 1-methyl-1-propylpiperidinium bis(trifluoromethylsulfonyl)imide and 1-butyl-1-methylpiperidinium bis(trifluoromethylsulfonyl)imide.
- sulfonate-based ionic compounds include methyltrioctylammonium tosylate, tributyldodecylphosphonium tosylate, and tributyldodecylphosphonium dodecylbenzenesulfonate.
- Iodine-based ionic compounds include 1,3-dimethylimidazolium iodide, 1-ethyl-3-methylimidazolium iodide, 1-ethyl-3-propylimidazolium iodide, 1-butyl-3-methylimidazolium Lithium iodide, 1-hexyl-3-methylimidazolium iodide, 1-allyl-3-methylimidazolium iodide, 1-allyl-3-ethylimidazolium iodide, 1,2-dimethyl-3-propylimidazo Lithium iodide etc. can be illustrated.
- the content ratio of the ionic compound to the total amount of the epoxy resin composition is not particularly limited, it is preferably 0.0001% by mass (1 ppm) to 3.1% by mass (31000 ppm).
- the content ratio of the ionic compound is 0.0001% by mass (1 ppm) or more, uneven distribution of the filler dispersed in the sealing material (cured product) covering the electrode connection portion can be suppressed more reliably. becomes easier.
- the ionic compound by setting the content ratio of the ionic compound to 3.1% by mass (31000 ppm) or less, the ionic compound exudes from the sealing material (cured body) of the semiconductor device, and the vicinity of the sealing material is caused by the ionic compound. It becomes easy to suppress the occurrence of various troubles due to contamination.
- the lower limit of the content ratio of the ionic compound is more preferably 0.001% by mass (10 ppm) or more, more preferably 0.003 (30 ppm) or more, and further preferably 0.005% by mass (50 ppm). It is more preferable that it is above.
- the upper limit of the content ratio of the ionic compound is more preferably 3.0% by mass (30000 ppm) or less, further preferably 2.0% by mass (20000 ppm) or less, and 1.2% by mass.
- the content of the ionic compound with respect to 100 parts by mass of the epoxy resin containing two or more epoxy groups is preferably 0.002 parts by mass to 11 parts by mass. Furthermore, from the viewpoint of further improving the injectability, the content of the ionic compound is more preferably more than 0.8 parts by mass and 11 parts by mass or less, more preferably 1 to 11 parts by mass.
- the total amount of (A) the epoxy resin and (D) the ionic compound is preferably 85% by mass or less, more preferably 82% by mass or less, relative to the total amount of all organic components contained in the epoxy resin composition.
- the total amount of (A) epoxy resin and (D) ionic compound is preferably 85% by mass or less with respect to the total amount of all organic components, it is possible to suppress the occurrence of poor curing when the epoxy resin composition is heated.
- the lower limit of the total amount of (A) epoxy resin and (D) ionic compound relative to the total amount of all organic components is not particularly limited, it is preferably 40% by mass or more for practical use. , more preferably 50% by mass or more.
- the epoxy resin composition of the present embodiment may further contain various additives as necessary.
- additives include, but are not limited to, core-shell type rubber particles, curing accelerators, silane coupling agents, curing accelerators, viscosity inhibitors, ion trapping agents, leveling agents, antioxidants, antifoaming agents. additives, flame retardants, coloring agents, reactive diluents, etc., and the types and amounts of these additives are conventional. Details of some additives are described below.
- the core-shell type rubber particles used as additives impart injectability to the epoxy resin composition and suppress peeling and migration of the cured epoxy resin composition.
- Rubber particles having a core-shell structure to be masterbatched include rubber particles composed of a combination of a core: polybutadiene and a shell: an acrylic copolymer, or a combination of a core: a silicone resin and a shell: an acrylic copolymer.
- the low elastic modulus within the operating temperature range of the epoxy resin composition can reduce the shrinkage stress of the epoxy resin composition, so the core: polybutadiene and shell: acrylic copolymer combination Rubber particles consisting of are preferred.
- the masterbatch treatment of rubber particles with a core-shell structure can be performed with a curing agent such as an epoxy resin or acid anhydride.
- a curing agent such as an epoxy resin or acid anhydride.
- Bisphenol type epoxy resins include bisphenol A type epoxy resins and bisphenol F type epoxy resins, and bisphenol F type epoxy resins are more preferable.
- the curing accelerator used as an additive imparts an appropriate curing speed to the epoxy resin composition.
- Curing accelerators include 2-methylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-phenyl-4-methylimidazole and the like.
- Commercially available products include 2-phenyl-4-methylimidazole (product name: 2P4MZ) manufactured by Shikoku Kasei, and 2,4-diamino-6-[2'-methylimidazolyl-(1')]-ethyl-s- manufactured by Shikoku Kasei.
- a triazine product name: 2MZA
- the curing accelerator may be used alone or in combination of two or more.
- the silane coupling agent used as an additive provides adhesion between the epoxy resin composition and the semiconductor element or substrate.
- Commercially available products include, for example, Z-6610, Z-6011, Z-6020, Z-6094, Z-6883, Z-6032, Z-6040, Z-6044, Z-6043, Z-6075, Z-6300 , Z-6519, Z-6825, Z-6030, Z-6033, Z-6062, Z-6862, Z-6911, Z-6026, AZ-720, Z-6050 (all manufactured by Dow Corning Toray Co., Ltd.) , KBM-303, KBM-402, KBM-403, KBE-402, KBE-403, KBM-1403, KBM-502, KBM-503, KBE-502, KBE-503, KBM-5103, KBM-602, KBM -603, KBE-603, KBM-903, KBE-903, KBE-9103, KBM-573, KBM-575, KBE-585, KBM-1003, KBE-1003, KBM-802, KBM-803,
- the epoxy resin composition of the present embodiment can be prepared by mixing and stirring at least components (A) to (D), and at this time, component (E) can also be blended as necessary.
- the mixing and stirring method is not particularly limited, and a known mixing and stirring method such as a roll mill can be used.
- a known mixing and stirring method such as a roll mill can be used.
- the epoxy resin (A) used as a raw material is solid, it is preferable to liquefy it by heat treatment or the like before mixing with other components before mixing.
- all raw material components may be mixed at once, and a primary mixture is prepared by mixing some components selected from all raw material components, The remaining ingredients may be mixed into the mixture.
- (C1) large diameter filler as (C) filler
- (C1) epoxy resin and (C1) the large-diameter filler may be mixed to prepare a primary mixture, and the remaining components may be mixed with this primary mixture.
- the epoxy resin composition of the present embodiment can be used as a sealing material for various electronic devices such as semiconductor devices.
- Use as a sealing material for various electronic devices such as semiconductor devices in which the first metal material constituting the electrode connection surface on one side of the interface is different from the second metal material constituting the electrode connection surface on the other side of the interface. is preferred.
- the combination of the first metal material and the second metal material is not particularly limited as long as it produces a potential difference when the two are connected.
- the semiconductor device of the present embodiment includes a substrate, a semiconductor element arranged on the substrate, and a sealing material (the epoxy resin composition of the present embodiment) sealing a gap between the semiconductor element and the substrate. (cured product)).
- the semiconductor device includes an electrode connection portion in which the electrode connection surface of the element-side electrode provided on the semiconductor element and the electrode connection surface of the substrate-side electrode provided on the substrate are connected. are arranged so as to surround this electrode connecting portion as well.
- the element-side metal material forming the electrode connection surface of the element-side electrode and the substrate-side metal material forming the electrode connection surface of the substrate-side electrode provided on the substrate are different from each other.
- the element-side electrodes and the substrate-side electrodes can be composed of, for example, solder bumps or metal pillars, but the element-side electrodes are preferably composed of metal pillars such as copper pillars.
- the semiconductor device of the present embodiment comprises a step of filling the gap between a substrate and a semiconductor element arranged on the substrate with the epoxy resin composition of the present embodiment (filling step), and and a step of curing the resin composition (curing step).
- filling step the electrode connection surface of the element-side electrode and the substrate side are normally placed in a state in which the surface of the semiconductor element on which the element-side electrode is provided faces the surface of the substrate on which the substrate-side electrode is provided.
- a step (connection step) of forming an electrode connection portion by connecting the electrode connection surface of the electrode is performed. Therefore, in the filling step, the epoxy resin composition is filled so as to surround the electrode connection portion, and the epoxy resin composition surrounding the electrode connection portion is cured in the curing step (cured product (sealing material) becomes).
- FIG. 1 is a cross-sectional view showing an example of the cross-sectional structure of a semiconductor device. Specifically, it shows an SEM image of the cross-sectional structure in the vicinity of an electrode connecting portion taken with a scanning electron microscope (FE-SEM). be.
- FE-SEM scanning electron microscope
- the substrate-side electrodes 10 are made of solder bumps made of a tin alloy containing tin as a main component, and the device-side electrodes 20 are made of copper pillars. are connected, a potential difference occurs.
- the encapsulating material 40 consists of a filler (relatively white portion of the encapsulating material 40 in the figure) and a resin matrix other than the filler (encapsulating material in the figure). 40 (relatively black portions).
- the filler in the encapsulant 40 and the resin matrix can be distinguished from each other by image processing using image processing software by designating a region corresponding to the encapsulant 40 in the SEM image. Such image processing is performed by performing binarization processing using the median value of the luminance distribution of the region corresponding to the designated sealing material 40 as a reference.
- the electrode connection portion 30 has a connection interface L between the electrode connection surface of the substrate-side electrode 10 and the electrode connection surface of the device-side electrode 20 .
- the region corresponding to the sealing material 40 can be divided into a region Ra on the semiconductor element side and a region Rb on the substrate side with reference to an extension line extending from the connection interface L.
- a is the filler occupancy within the region Ra
- b is the filler occupancy within the region Rb.
- the occupation rate is a value calculated based on the SEM image obtained by the binarization process as illustrated in FIG. ImageJ of the National Institutes of Health (NIH) was used for a series of image processing for calculating the filler distribution index.
- the filler distribution index is 100, it means that the filler dispersed in the sealing material 40 is most uniformly distributed (distribution bias is minimal). On the other hand, the more the filler distribution index is away from 100, the more biased the distribution of the filler dispersed in the sealing material 40 is. Further, when the filler distribution index is less than 100, it means that the filler is distributed unevenly in the region Rb, and when it is greater than 100, it means that the filler is distributed unevenly in the region Ra. do. On which side of the region Ra or the region Rb the filler tends to be unevenly distributed depends on the metal material forming the electrode connection surface of the substrate-side electrode 10 and the metal material forming the electrode connection surface of the element-side electrode 20. depends on the combination of In the semiconductor device of the present embodiment, the filler distribution index is preferably within the range of 100 ⁇ 50, more preferably within the range of 100 ⁇ 30, and preferably within the range of 100 ⁇ 20. More preferred.
- Epoxy resin compositions of Examples 1 to 43 and Comparative Example 1 were prepared by mixing and stirring raw materials using a roll mill so as to obtain the compounding ratios shown in Tables 1 to 6.
- the details of the components (A) to (E) used as raw materials are as follows.
- Epoxy resin a1 YDF8170 (bisphenol F type, epoxy equivalent 158 g/eq, number of epoxy groups: 2, manufactured by Nippon Steel Chemical & Materials Co., Ltd.)
- EXA-850CRP bisphenol A type, epoxy equivalent 172 g/eq, number of epoxy groups: 2, manufactured by DIC
- a3 HP4032D (naphthalene type, epoxy equivalent 140 g/eq, number of epoxy groups: 2, manufactured by DIC)
- a4 jER630 (aminophenol type, epoxy equivalent 98 g/eq, number of epoxy groups: 3, manufactured by Mitsubishi Chemical Corporation)
- a5: YX7400 (biphenyl type, epoxy equivalent 440 g/eq, number of epoxy groups: 2, manufactured by Mitsubishi Chemical Corporation)
- Curing agent b1 HDAA (amine curing agent, 4,4′-diamino-3,3′-diethyldiphenylmethane, active hydrogen equivalent 63.5 g/eq, manufactured by Nippon Kayaku Co., Ltd.)
- Ethacure 100 amine curing agent, diethyltrienediamine, active hydrogen equivalent 44.6 g/eq, manufactured by Albemarle
- b3 HN5500 (acid anhydride, active hydrogen equivalent 168 g/eq, manufactured by Hitachi Chemical Co., Ltd.)
- MEH8006 phenolic curing agent, active hydrogen equivalent 135 g / eq, manufactured by Meiwa Kasei Co., Ltd.
- tributyldodecylphosphonium bis(trifluoromethanesulfonyl)imide (Fuji Film Wako Pure Chemical Industries: 205-19961, CAS No. 1002754-39-3, melting point: -16°C, structural formula d2 below)
- Trimethylpropylammonium bis(trifluoromethanesulfonyl)imide (Fuji Film Wako Pure Chemical: 201-19941, CAS No. 268536-05-6, melting point: 19°C, structural formula d4 below)
- methyltrioctylammonium bis(trifluoromethanesulfonyl)imide (Fuji Film Wako Pure Chemical: 136-17481, CAS No. 375395-33-8, melting point: -70°C, structural formula d6 below)
- tributylmethylammonium bis(trifluoromethanesulfonyl)imide (Fuji Film Wako Pure Chemical: 352-27751, CAS No. 405514-94-5, melting point: unknown (however, the ionic compound of the following structural formula d7 is confirmed to be liquid), structural formula d7)
- d9 methyltrioctylammonium tosylate (melting point: 78°C, structural formula d9 below)
- tributyldodecylphosphonium dodecylbenzenesulfonate (melting point: unknown (however, it was confirmed that the organic salt of the following structural formula d11 was liquid at room temperature), the following structural formula d11)
- d14 methyltrioctylammonium imidodisulfuryl fluoride (melting point: unknown (however, it was confirmed that the ionic compound of structural formula d14 below is liquid at room temperature), structural formula d14 below)
- d15 Tetrabutylammonium hexafluorophosphate (Fujifilm Wako Pure Chemical: 352-41372, CAS No. 3109-63-5, melting point: 242°C, structural formula d15 below)
- d16 Methyltrioctylammonium hexafluorophosphate (Fujifilm Wako Pure Chemical: 133-17491, CAS No. 569652-37-5, melting point: 78°C, structural formula d16 below)
- Viscosity, thixotropy index and injectability of epoxy resin compositions of Examples and Comparative Examples, and filler distribution index and appearance of cured products of epoxy resin compositions of Examples and Comparative Examples are as follows. It was measured or evaluated by the procedure shown. The results are shown in Tables 1-6.
- viscosity The viscosity of the epoxy resin composition immediately after preparation was measured using a rotational viscometer HBDV-1 manufactured by Brookfield (using spindle SC4-14) at a liquid temperature of 25°C and 50 rpm and a liquid temperature of 25°C and 5 rpm. did.
- Thixotropy index (T.I.) The thixotropic index (T.I.) of the epoxy resin composition was calculated as the ratio of the viscosity measured at 5 rpm to the viscosity measured at 50 rpm using the two viscosities obtained in the viscosity measurements described above.
- test piece was prepared by providing a gap of 20 ⁇ m or 50 ⁇ m on an organic substrate (FR-4 substrate) and fixing a glass plate instead of a semiconductor element. Next, while the test piece was placed on a hot plate set at a temperature of 110° C., an epoxy resin composition was applied to one end of the glass plate to form a test piece between the organic substrate and the glass plate. An epoxy resin composition was injected into the gap. At this time, the time required for the injection distance of the epoxy resin composition to reach 20 mm was measured when one end side of the glass plate coated with the epoxy resin composition was assumed to be 0 mm. This procedure was performed twice, and the average value of the two measurements was obtained as the injection time.
- a semiconductor device was fabricated by flip-chip mounting using the epoxy resin composition.
- a substrate provided with solder bumps made of a tin alloy containing tin as the main component as substrate-side electrodes 10 and a semiconductor element provided with device-side electrodes 20 made of copper pillars were used.
- a semiconductor device was manufactured by sequentially performing a connecting process, a filling process, and a curing process.
- the curing conditions in the curing step were 150° C. and 120 minutes.
- the fabricated semiconductor device with a chip size of 10 mm x 10 mm was cut using a slicer (ISOMET 4000 manufactured by BUEHLER), and the cut surfaces were polished using abrasive papers of No. 240, No. 800, and No. 1200 in order.
- a sample for SEM observation was obtained in which the cut surface of the central portion of the semiconductor device was exposed.
- an SEM image in which the vicinity of the electrode connection portion 30 as illustrated in FIG.
- the filler occupation ratio a within the region Ra and the filler occupation ratio b within the region Rb were obtained.
- these values a and b were substituted into the formula (1) to calculate the filler distribution index.
- the case where the filler distribution index was within 100 ⁇ 50 was judged to be good.
- a test piece was obtained by curing the epoxy resin composition under curing conditions of 150° C. for 120 minutes. Next, the surface of this test piece was visually confirmed to observe whether or not the ionic compound had exuded onto the surface of the test piece. Evaluation criteria are as follows. A: Bleeding of ionic compound was not observed B: Bleeding of ionic compound was observed
- Substrate-side electrode 10 Substrate-side electrode 20 Device-side electrode 30 Electrode connecting portion 40 Sealing material
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Abstract
Description
(D-1)1-ブチル-1-メチルピロリジニウム=ビス(トリフルオロメチルスルホニル)イミド、
(D-2)トリブチルドデシルホスホニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-3)1-ヘキシル-4-メチルピリジニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-4)トリメチルプロピルアンモニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-5)4-(2-エトキシエチル)-4-メチルモルホリニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-6)メチルトリオクチルアンモニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-7)トリブチルメチルアンモニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-8)1-ブチル-3-ドデシルイミダゾリウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-9)メチルトリオクチルアンモニウム=トシラート、
(D-10)トリブチルドデシルホスホニウム=トシラート、
(D-11)トリブチルドデシルホスホニウム=ドデシルベンゼンスルホネート、
(D-12)N-オレイル-N,N-ジ(2-ヒドロキシエチル)-N-メチルアンモニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-13)トリブチル[3-(トリメトキシシリル)プロピル]ホスホニウム=1,1,1-トリフルオロ-N-[(トリフルオロメチル)スルホニル]メタンスルホンアミド、
(D-14)メチルトリオクチルアンモニウムイミドジスルフリルフルオリド、
(D-15)テトラブチルアンモニウムヘキサフルオロフォスファート、および、
(D-16)メチルトリオクチルアンモニウムヘキサフルオロホスファート
からなる群より選択される少なくとも1つを含むことが好ましい。
本実施形態のエポキシ樹脂組成物は、(A)エポキシ樹脂と、(B)硬化剤と、(C)フィラーと、(D)カチオンまたはアニオンの少なくとも一方が有機物であるイオン性化合物と、を含むことを特徴とする。よって、フリップチップ実装時に、エポキシ樹脂組成物を半導体素子等の電子素子と基板との間に充填した後、加熱硬化させる場合において、エポキシ樹脂組成物として本実施形態のエポキシ樹脂組成物を用いれば、電極接続部を覆う封止材(硬化物)中に分散しているフィラーの分布の偏りを抑制できる。このため、接続信頼性の高い半導体装置やその他の電子装置を得ることが容易である。このような効果が得られる理由の詳細は不明であるが、本発明者らは以下の通りであると推定している。
本実施形態のエポキシ樹脂組成物に用いられるエポキシ樹脂としては、一般的に半導体封止用として使用される各種のエポキシ樹脂であれば特に限定されないが、粘度や注入性の観点からは液状のエポキシ樹脂を用いることが好適である。また、エポキシ樹脂組成物に配合されるエポキシ樹脂としては、1種類のエポキシ樹脂のみを用いてもよく、2種以上のエポキシ樹脂を併用してもよい。エポキシ樹脂(1分子)に含まれるエポキシ基の数は1個以上であればよいが、通常は、2個以上であることが好ましい。なお、エポキシ基の数の上限値は特に限定されないが、通常は、5個以下であることが好ましい。エポキシ樹脂は、一般的に半導体封止用として使用される各種のエポキシ樹脂であってよく、とくに限定されない。
本実施形態のエポキシ樹脂組成物に用いられる硬化剤は、一般的に使用される各種硬化剤であればよく、特に限定されない。硬化剤の配合量は、エポキシ樹脂との化学量論上の当量比(硬化剤当量/エポキシ基当量)が0.6~1.5となる量であることが好ましく、0.7~1.2となる量がより好ましい。
本実施形態のエポキシ樹脂組成物には、主に封止した部位(硬化物)の線膨張係数を低減させることで耐サーマルサイクル性を向上させたり、耐湿性を向上させたりするなどの観点で、フィラーが配合される。フィラーとしては、硬化物の線膨張係数を低減させる効果を有するものであれば特に限定されず公知のフィラーを適宜利用することができ、たとえば、アルミナフィラーやシリカフィラーなどを利用できる。また、フィラーは、シランカップリング剤等で表面処理されたものであってもよい。
本実施形態のエポキシ樹脂組成物には、カチオンおよびアニオンから構成され、カチオンまたはアニオンの少なくとも一方が有機物であるイオン性化合物が配合される。イオン性化合物としては公知のイオン性化合物を用いることができる。このイオン性化合物は、本実施形態のエポキシ樹脂組成物の使用温度域において、少なくとも一部がエポキシ樹脂に対して可溶であることが特に好ましい。可溶とは室温(25℃)において、エポキシ樹脂組成物に含まれるエポキシ樹脂100gに対して、当該エポキシ樹脂組成物に含まれるイオン性化合物の溶解量が0.0005g以上であることを意味する。なお、エポキシ樹脂100gに対するイオン性化合物の溶解量は0.001g以上が好ましく、0.003g以上がより好ましい。また、イオン性化合物の融点は特に限定されないが、250℃以下が好ましく、100℃以下が好ましく、常温(25℃)未満であることがより好ましい。なお、融点が100℃以下のイオン性化合物は、いわゆる「イオン液体」として知られている。また、イオン性化合物の融点の下限値は特に限定されないが、実用上は-100℃以上が好適である。
本実施形態のエポキシ樹脂組成物には、(A)~(D)成分以外に、必要に応じて各種の添加剤をさらに配合してもよい。添加剤としては特に限定されるものではないが、たとえば、コアシェル型ゴム粒子、硬化促進剤、シランカップリング剤、硬化促進剤、粘度抑制剤、イオントラップ剤、レベリング剤、酸化防止剤、消泡剤、難燃剤、着色剤、反応性希釈剤などが挙げられ、これら添加剤の種類、配合量は常法通りである。以下にいくつかの添加剤の詳細について説明する。
本実施形態のエポキシ樹脂組成物は、半導体装置等の各種の電子装置の封止材として利用することができるが、特に、封止材により囲われた電極接続部を備え、電極接続部の接続界面の一方側の電極接続面を構成する第一の金属材料と、他方側の電極接続面を構成する第二の金属材料とが異なる半導体装置等の各種の電子装置の封止材として利用することが好適である。ここで、第一の金属材料と、第二の金属材料との組み合わせとしては、両者を接続した際に電位差が生じる組合せであれば特に限定されないが、(a)銅、銅合金、銀、銀合金、金および金合金からなる群より選択される第一の金属材料と、錫および錫合金からなる群より選択される第二の金属材料との組み合わせや、(b)(a)の組合せと同程度前後あるいはそれ以上の電位差が生じる金属材料同士の組合せが好適である。このような電極接続部を備えた電子装置の製造に際して、本実施形態のエポキシ樹脂組成物を用いて樹脂封止を行った場合、電極接続部を覆う封止材(硬化物)中に分散しているフィラーの分布の偏りを抑制することができる。
・式(1) フィラー分布指数=100×a/b
表1~表6に示す配合比率となるように、ロールミルを用いて原料を混合攪拌することにより実施例1~43および比較例1のエポキシ樹脂組成物を調製した。なお、原料として用いた(A)~(E)成分の詳細は以下の通りである。
(A)エポキシ樹脂
a1:YDF8170(ビスフェノールF型、エポキシ当量158g/eq、エポキシ基の数:2個、日鉄ケミカル&マテリアル社製)
a2:EXA-850CRP(ビスフェノールA型、エポキシ当量172g/eq、エポキシ基の数:2個、DIC社製)
a3:HP4032D(ナフタレン型、エポキシ当量140g/eq、エポキシ基の数:2個、DIC社製)
a4:jER630(アミノフェノール型、エポキシ当量98g/eq、エポキシ基の数:3個、三菱ケミカル社製)
a5:YX7400(ビフェニル型、エポキシ当量440g/eq、エポキシ基の数:2個、三菱ケミカル社製)
b1:HDAA(アミン系硬化剤、4,4’-ジアミノ-3,3’-ジエチルジフェニルメタン、活性水素当量63.5g/eq、日本化薬社製)
b2:エタキュア100(アミン系硬化剤、ジエチルトリエンジアミン、活性水素当量44.6g/eq、アルベマール社製)
b3:HN5500(酸無水、活性水素当量168g/eq、日立化成株式会社製)
b4:MEH8006(フェノール系硬化剤、活性水素当量135g/eq、明和化成社製)
(C1)大径フィラー
・SE2200-SEJ(3-グリシドキシプロピルトリメトキシシラン表面処理二酸化ケイ素、平均粒径0.6μm、アドマテックス社製)
・SE1050-SEO(3-グリシドキシプロピルトリメトキシシラン表面処理二酸化ケイ素、平均粒径0.3μm、アドマテックス社製)
・SE5200-SEE(3-グリシドキシプロピルトリメトキシシラン表面処理二酸化ケイ素、平均粒径2.0μm、アドマテックス社製)
・SE2300(二酸化ケイ素-表面処理なし、平均粒径0.6μm、アドマテックス社製)
・SE2200―SME(3-メタクリロキシプロピルトリメトキシシラン表面処理二酸化ケイ素、平均粒径0.6μm、アドマテックス社製)
・g1:3-グリシドキシプロピルトリメトキシシラン
・g2:3-メタクリロキシプロピルトリメトキシシラン
・YA010A(平均粒径10nm、アドマテックス社製)
・YC100C(平均粒径100nm、アドマテックス社製)
d1:1-ブチル-1-メチルピロリジニウム=ビス(トリフルオロメチルスルホニル)イミド(富士フイルム和光純薬:027-15441、CAS No.223437-11-4、融点:-15℃、下記構造式d1)
e1:MX-137(コアシェル型ブタジエン系ゴム粒子、カネカ社製)
e2:MX―965(コアシェル型シリコーン径ゴム粒子、カネカ社製)
e3:2P4MZ(2-フェニル-4-メチルイミダゾール、硬化促進剤、四国化成社製)
e4:KBM403(3-グリシドキシプロピルトリメトキシシラン、カップリング剤、信越化学工業社製)
e5:CG1400 (ジシアンジアミド、硬化促進剤、エアプロダクツ アンド ケミカルズ社製)
e6:TPP(トリフェニルホスフィン、粘度抑制剤、北興化学工業社製)
各実施例および比較例のエポキシ樹脂組成物の粘度、チクソトロピー指数および注入性、ならびに、各実施例および比較例のエポキシ樹脂組成物の硬化物のフィラー分布指数および硬化物外観について、以下に示す手順にて測定または評価した。結果を表1~表6に示す。
粘度は、調製直後のエポキシ樹脂組成物について、ブルックフィールド社製回転粘度計HBDV-1(スピンドルSC4-14使用)用いて、液温25℃、50rpmおよび液温25℃、5rpmの条件にて測定した。
エポキシ樹脂組成物のチクソトロピー指数(T.I.)は、上述した粘度測定において得られた2種類の粘度を用い、50rpmで測定した粘度に対する5rpmで測定した粘度の比率として計算した。
有機基板(FR-4基板)上に、20μmまたは50μmのギャップを設けて、半導体素子の代わりにガラス板を固定した試験片を作製した。次に、この試験片を温度110℃に設定したホットプレート上に設置した状態で、ガラス板の一端側にエポキシ樹脂組成物を塗布することで、有機基板とガラス板との間に形成されたギャップ内にエポキシ樹脂組成物を注入した。この際、エポキシ樹脂組成物が塗布されたガラス板の一端側を0mmとした場合におけるエポキシ樹脂組成物の注入距離が20mmに達するまでの時間を測定した。この手順を2回実施し、2回の測定値の平均値を注入時間として求めた。
エポキシ樹脂組成物を用いてフリップチップ実装により半導体装置を作製した。ここで、半導体装置の作製には、錫を主成分として含む錫合金からなる半田バンプを基板側電極10として備えた基板と、銅ピラーからなる素子側電極20を備えた半導体素子とを用いた。そして、接続工程、充填工程、硬化工程を順次実施することで半導体装置を作製した。なお、硬化工程における硬化条件は、150℃・120分とした。
エポキシ樹脂組成物を150℃120分の硬化条件で硬化することで試験片を得た。次に、この試験片の表面を目視で確認して、イオン性化合物が試験片の表面に染み出しているのか否かを観察した。評価基準は以下の通りである。
A:イオン性化合物の染み出しは観測されなかった
B:イオン性化合物の染み出しが観測された
20 素子側電極
30 電極接続部
40 封止材
Claims (17)
- (A)エポキシ樹脂と、(B)硬化剤と、(C)フィラーと、(D)カチオンまたはアニオンの少なくとも一方が有機物であるイオン性化合物と、
を含むことを特徴とするエポキシ樹脂組成物。 - 前記(D)イオン性化合物が、ピリジニウム系イオン性化合物、イミダゾリウム系イオン性化合物、アンモニウム系イオン性化合物、ホスホニウム系イオン性化合物、ピロリジニウム系イオン性化合物、ピペリジニウム系イオン性化合物、スルホネート系イオン性化合物、および、ヨウ素系イオン性化合物からなる群より選択される少なくとも1つを含む、ことを特徴とする請求項1に記載のエポキシ樹脂組成物。
- 前記(D)イオン性化合物が、<i>ピリジニウム系カチオン、イミダゾリウム系カチオン、アンモニウム系カチオン、ピロリジニウム系カチオン、ピペリジニウム系カチオンおよびホスホニウム系カチオンからなる群より選択される少なくとも1種のカチオンと、<ii>スルホニルイミド系アニオン、スルホネート系アニオン、ヘキサフルオロリン酸アニオン、ビス(トリフルオロメチルスルホニル)イミドアニオン、イミドジスルフリルフルオリドアニオンおよびヨウ素アニオンからなる群より選択される少なくとも1種のアニオンとを含む、ことを特徴とする請求項1または請求項2に記載のエポキシ樹脂組成物。
- 前記(D)イオン性化合物が、イオン液体であることを特徴とする請求項1~請求項3のいずれか1項に記載のエポキシ樹脂組成物。
- 前記(D)イオン性化合物は、反応性基を有していることを特徴とする請求項1~請求項4のいずれか1項に記載のエポキシ樹脂組成物。
- 前記(D)イオン性化合物の含有比率が、エポキシ樹脂組成物全量に対して、0.0001質量%~3.1質量%であることを特徴とする請求項1~請求項5のいずれか1項に記載のエポキシ樹脂組成物。
- 前記(D)イオン性化合物の含有比率が、エポキシ樹脂組成物全量に対して、0.001質量%以上1.2質量%以下であることを特徴とする請求項1~請求項6のいずれか1項に記載のエポキシ樹脂組成物。
- 前記(D)イオン性化合物が、
(D-1)1-ブチル-1-メチルピロリジニウム=ビス(トリフルオロメチルスルホニル)イミド、
(D-2)トリブチルドデシルホスホニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-3)1-ヘキシル-4-メチルピリジニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-4)トリメチルプロピルアンモニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-5)4-(2-エトキシエチル)-4-メチルモルホリニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-6)メチルトリオクチルアンモニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-7)トリブチルメチルアンモニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-8)1-ブチル-3-ドデシルイミダゾリウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-9)メチルトリオクチルアンモニウム=トシラート、
(D-10)トリブチルドデシルホスホニウム=トシラート、
(D-11)トリブチルドデシルホスホニウム=ドデシルベンゼンスルホネート、
(D-12)N-オレイル-N,N-ジ(2-ヒドロキシエチル)-N-メチルアンモニウム=ビス(トリフルオロメタンスルホニル)イミド、
(D-13)トリブチル[3-(トリメトキシシリル)プロピル]ホスホニウム=1,1,1-トリフルオロ-N-[(トリフルオロメチル)スルホニル]メタンスルホンアミド、
(D-14)メチルトリオクチルアンモニウムイミドジスルフリルフルオリド、
(D-15)テトラブチルアンモニウムヘキサフルオロフォスファート、および、
(D-16)メチルトリオクチルアンモニウムヘキサフルオロホスファート
からなる群より選択される少なくとも1つを含むことを特徴とする請求項1~請求項7のいずれか1項に記載のエポキシ樹脂組成物。 - 前記(A)エポキシ樹脂が、液状のエポキシ樹脂を含むことを特徴とする請求項1~請求項8のいずれか1項に記載のエポキシ樹脂組成物。
- 前記(A)エポキシ樹脂が、ビスフェノールF型エポキシ樹脂、ビスフェノールA型エポキシ樹脂、ビフェニル型エポキシ樹脂、アミノフェノール型エポキシ樹脂、および、ナフタレン型エポキシ樹脂からなる群より選択される少なくとも1つを含むことを特徴とする請求項1~請求項9のいずれか1項記載のエポキシ樹脂組成物。
- 前記(C)フィラーとして、平均粒径が0.2μm以上である(C1)大径フィラーを含み、
前記(C1)大径フィラーの含有比率が、エポキシ樹脂組成物全量に対して、35質量%~70質量%であることを特徴とする請求項1~請求項10のいずれか1項に記載のエポキシ樹脂組成物。 - 前記(C1)大径フィラーの平均粒径が0.2~3.0μmであることを特徴とする請求項11に記載のエポキシ樹脂組成物。
- 前記(C)フィラーとして、平均粒径が0.2μm未満である(C2)小径フィラーを含み、
前記(C2)小径フィラーの平均粒径が5nm~120nmであることを特徴とする請求項1~請求項12のいずれか1項に記載のエポキシ樹脂組成物。 - (E)添加剤をさらに含み、
前記(E)添加剤として、コアシェル型ゴム粒子を含むことを特徴とする請求項1~請求項13のいずれか1項に記載のエポキシ樹脂組成物。 - 半導体装置の封止材として使用されることを特徴とする請求項1~請求項14のいずれか1項に記載のエポキシ樹脂組成物。
- 基板と、前記基板上に配置された半導体素子と、前記半導体素子と前記基板との間の空隙を封止している請求項1~請求項15のいずれか1項に記載のエポキシ樹脂組成物の硬化物と、を備えることを特徴とする半導体装置。
- 基板と、前記基板上に配置されている半導体素子との間の空隙を請求項1~請求項15のいずれか1項に記載のエポキシ樹脂組成物で充填する工程と、前記エポキシ樹脂組成物を硬化する工程と、を含むことを特徴とする半導体装置の製造方法。
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