WO2013118680A1 - 感光性樹脂組成物、パターン硬化膜の製造方法及び電子部品 - Google Patents
感光性樹脂組成物、パターン硬化膜の製造方法及び電子部品 Download PDFInfo
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- WO2013118680A1 WO2013118680A1 PCT/JP2013/052479 JP2013052479W WO2013118680A1 WO 2013118680 A1 WO2013118680 A1 WO 2013118680A1 JP 2013052479 W JP2013052479 W JP 2013052479W WO 2013118680 A1 WO2013118680 A1 WO 2013118680A1
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- photosensitive resin
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- 238000000034 method Methods 0.000 title claims abstract description 36
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- 239000011347 resin Substances 0.000 claims abstract description 76
- 150000001875 compounds Chemical class 0.000 claims abstract description 60
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 24
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- 238000010438 heat treatment Methods 0.000 claims description 38
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 28
- 239000011229 interlayer Substances 0.000 claims description 26
- 239000000758 substrate Substances 0.000 claims description 24
- 239000007864 aqueous solution Substances 0.000 claims description 23
- 125000000217 alkyl group Chemical group 0.000 claims description 18
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 17
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 13
- 125000000962 organic group Chemical group 0.000 claims description 13
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- -1 acryl Chemical group 0.000 description 75
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- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 18
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- 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 description 9
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- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 8
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
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- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 7
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- 238000000576 coating method Methods 0.000 description 7
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- JESXATFQYMPTNL-UHFFFAOYSA-N mono-hydroxyphenyl-ethylene Natural products OC1=CC=CC=C1C=C JESXATFQYMPTNL-UHFFFAOYSA-N 0.000 description 7
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- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
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- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 6
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- 238000005259 measurement Methods 0.000 description 6
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- 238000006116 polymerization reaction Methods 0.000 description 6
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 6
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 6
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 6
- 239000008158 vegetable oil Substances 0.000 description 6
- XLLXMBCBJGATSP-UHFFFAOYSA-N 2-phenylethenol Chemical compound OC=CC1=CC=CC=C1 XLLXMBCBJGATSP-UHFFFAOYSA-N 0.000 description 5
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- 125000002947 alkylene group Chemical group 0.000 description 5
- 239000002585 base Substances 0.000 description 5
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 5
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- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 5
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 5
- 125000004484 1-methylpiperidin-4-yl group Chemical group CN1CCC(CC1)* 0.000 description 4
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
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- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- XOYZYOURGXJJOC-UHFFFAOYSA-N bis(2-tert-butylphenyl)iodanium Chemical class CC(C)(C)C1=CC=CC=C1[I+]C1=CC=CC=C1C(C)(C)C XOYZYOURGXJJOC-UHFFFAOYSA-N 0.000 description 4
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
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- 230000000694 effects Effects 0.000 description 4
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- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 4
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
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- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 4
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- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
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- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
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- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
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- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 4
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 4
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
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- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 3
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- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
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- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
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- 125000003118 aryl group Chemical group 0.000 description 3
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- 238000009792 diffusion process Methods 0.000 description 3
- OZLBDYMWFAHSOQ-UHFFFAOYSA-N diphenyliodanium Chemical class C=1C=CC=CC=1[I+]C1=CC=CC=C1 OZLBDYMWFAHSOQ-UHFFFAOYSA-N 0.000 description 3
- ORKZATPRQQSLDT-UHFFFAOYSA-N diphenylmethanethiol Chemical class C=1C=CC=CC=1C(S)C1=CC=CC=C1 ORKZATPRQQSLDT-UHFFFAOYSA-N 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
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- 150000002440 hydroxy compounds Chemical class 0.000 description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 3
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- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
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- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 3
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 3
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- 125000001302 tertiary amino group Chemical group 0.000 description 3
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 3
- NRZWQKGABZFFKE-UHFFFAOYSA-N trimethylsulfonium Chemical class C[S+](C)C NRZWQKGABZFFKE-UHFFFAOYSA-N 0.000 description 3
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- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002577 polybenzoxazole Polymers 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 125000006239 protecting group Chemical group 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 229940107700 pyruvic acid Drugs 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000004151 rapid thermal annealing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 235000019512 sardine Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000008159 sesame oil Substances 0.000 description 1
- 235000011803 sesame oil Nutrition 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
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- JIWBIWFOSCKQMA-UHFFFAOYSA-N stearidonic acid Natural products CCC=CCC=CCC=CCC=CCCCCC(O)=O JIWBIWFOSCKQMA-UHFFFAOYSA-N 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 125000000565 sulfonamide group Chemical group 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- YBBRCQOCSYXUOC-UHFFFAOYSA-N sulfuryl dichloride Chemical compound ClS(Cl)(=O)=O YBBRCQOCSYXUOC-UHFFFAOYSA-N 0.000 description 1
- 239000002600 sunflower oil Substances 0.000 description 1
- SRWOQYHYUYGUCS-UHFFFAOYSA-N tert-butyl-dihydroxy-phenylsilane Chemical compound CC(C)(C)[Si](O)(O)C1=CC=CC=C1 SRWOQYHYUYGUCS-UHFFFAOYSA-N 0.000 description 1
- HAQMPJFWQWLQDO-UHFFFAOYSA-N tert-butyl-ethyl-hydroxy-phenylsilane Chemical compound CC[Si](O)(C(C)(C)C)C1=CC=CC=C1 HAQMPJFWQWLQDO-UHFFFAOYSA-N 0.000 description 1
- UNAYGNMKNYRIHL-UHFFFAOYSA-N tert-butyl-hydroxy-diphenylsilane Chemical compound C=1C=CC=CC=1[Si](O)(C(C)(C)C)C1=CC=CC=C1 UNAYGNMKNYRIHL-UHFFFAOYSA-N 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 125000006158 tetracarboxylic acid group Chemical group 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- UWHZIFQPPBDJPM-BQYQJAHWSA-N trans-vaccenic acid Chemical compound CCCCCC\C=C\CCCCCCCCCC(O)=O UWHZIFQPPBDJPM-BQYQJAHWSA-N 0.000 description 1
- XQGWAPPLBJZCEV-UHFFFAOYSA-N triethoxy(propyl)silane;urea Chemical compound NC(N)=O.CCC[Si](OCC)(OCC)OCC XQGWAPPLBJZCEV-UHFFFAOYSA-N 0.000 description 1
- FCVNATXRSJMIDT-UHFFFAOYSA-N trihydroxy(phenyl)silane Chemical compound O[Si](O)(O)C1=CC=CC=C1 FCVNATXRSJMIDT-UHFFFAOYSA-N 0.000 description 1
- QQUBYBOFPPCWDM-UHFFFAOYSA-N trihydroxy-(4-trihydroxysilylphenyl)silane Chemical compound O[Si](O)(O)C1=CC=C([Si](O)(O)O)C=C1 QQUBYBOFPPCWDM-UHFFFAOYSA-N 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003739 xylenols Chemical class 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0384—Macromolecular compounds which are rendered insoluble or differentially wettable with ethylenic or acetylenic bands in the main chain of the photopolymer
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/062—Copolymers with monomers not covered by C08L33/06
- C08L33/068—Copolymers with monomers not covered by C08L33/06 containing glycidyl groups
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/022—Quinonediazides
- G03F7/023—Macromolecular quinonediazides; Macromolecular additives, e.g. binders
- G03F7/0233—Macromolecular quinonediazides; Macromolecular additives, e.g. binders characterised by the polymeric binders or the macromolecular additives other than the macromolecular quinonediazides
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/022—Quinonediazides
- G03F7/023—Macromolecular quinonediazides; Macromolecular additives, e.g. binders
- G03F7/0233—Macromolecular quinonediazides; Macromolecular additives, e.g. binders characterised by the polymeric binders or the macromolecular additives other than the macromolecular quinonediazides
- G03F7/0236—Condensation products of carbonyl compounds and phenolic compounds, e.g. novolak resins
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02118—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer carbon based polymeric organic or inorganic material, e.g. polyimides, poly cyclobutene or PVC
-
- 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
- H01L21/18—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 the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
Definitions
- the present invention relates to a photosensitive resin composition, a method for producing a patterned cured film using the same, and an electronic component.
- the photosensitive resin composition that becomes the surface protective layer, interlayer insulating layer and rewiring insulating layer of the semiconductor element has more excellent sensitivity and resolution. It is required to be able to form a fine and precise pattern cured film.
- a photosensitive resin composition containing an alkali-soluble resin having a phenolic hydroxyl group has been proposed (see, for example, Patent Document 1).
- a method for producing a cured pattern film includes a step of drying a resin film formed by applying a photosensitive resin composition on a substrate, a step of exposing the resin film, and an exposed portion or an unexposed portion. It includes a developing step of removing with a developing solution and a step of curing the patterned resin film obtained by the development by heating.
- the resin film melts and the pattern shape and dimensions change (pattern melt).
- an object of the present invention is to provide a photosensitive resin composition having an excellent resolution, capable of forming a pattern having excellent heat resistance and impact resistance, and developable with an alkaline aqueous solution. And Moreover, this invention aims at providing the manufacturing method of the pattern cured film using the said photosensitive resin composition, and the electronic component which has the said pattern cured film.
- the present invention relates to the following.
- Photosensitivity containing (A) an alkali-soluble resin having a phenolic hydroxyl group, (B) a compound that generates an acid by light, and (C) an acrylic resin having a group that crosslinks the component (A).
- Resin composition [2] The photosensitive resin composition, wherein the component (C) is an acrylic resin containing a structural unit represented by the following general formula (1).
- R 1 represents a hydrogen atom or a methyl group
- R 2 represents an organic group having a group that crosslinks with the component (A).
- the photosensitive resin composition, wherein the component (C) is an acrylic resin further including a structural unit represented by the following general formula (2).
- R 3 represents a hydrogen atom or a methyl group
- R 4 represents an alkyl group having 4 to 20 carbon atoms.
- the photosensitive resin composition, wherein the component (C) is an acrylic resin further containing a structural unit represented by the following formula (3) or (4).
- the photosensitive resin composition comprising 1 to 50 parts by mass of the component (C) with respect to 100 parts by mass of the component (A).
- the photosensitive resin composition, wherein the component (A) is a phenol resin.
- the photosensitive resin composition, wherein the component (B) is an o-quinonediazide compound.
- the said photosensitive resin composition which further contains the acrylic resin which does not contain the group which bridge
- the photosensitive resin composition further comprising (F) a thermal acid generator.
- Applying the photosensitive resin composition on a substrate, drying the applied photosensitive resin composition to form a resin film, exposing the resin film, and the resin after exposure The manufacturing method of a pattern cured film which has the process of developing a film
- the present invention no residue remains at the time of development, or generation of the residue is sufficiently suppressed, that is, excellent in developability, and film loss of an unexposed portion at the time of development is suppressed, and photosensitivity having a good contrast.
- a resin composition can be provided.
- the photosensitive resin composition of the present invention has good photosensitive properties (sensitivity and resolution), and the resulting pattern cured film has good mechanical properties (breaking elongation and elastic modulus) and pattern melt resistance, And the haze value of a pattern cured film can be suppressed.
- the manufacturing method of the pattern cured film using the said photosensitive resin composition and the electronic component which has the said pattern cured film can be provided.
- (meth) acrylate in the present specification means “acrylate” and “methacrylate” corresponding thereto.
- (meth) acryl means “acryl” and “methacryl” corresponding thereto.
- the photosensitive resin composition according to the present embodiment includes (A) an alkali-soluble resin having a phenolic hydroxyl group, (B) a compound that generates an acid by light, and (C) a group that crosslinks with the component (A) (reaction). And an acrylic resin having a functional group).
- A an alkali-soluble resin having a phenolic hydroxyl group
- B a compound that generates an acid by light
- C a group that crosslinks with the component (A) (reaction).
- an acrylic resin having a functional group an acrylic resin having a functional group
- the component (A) is a resin having a phenolic hydroxyl group in the molecule and soluble in an alkali developer.
- the component (A) is soluble in an alkaline aqueous solution.
- alkali-soluble resin having a phenolic hydroxyl group examples include poly (hydroxystyrene) resins such as polyhydroxystyrene and copolymers containing hydroxystyrene as monomer units, phenol resins, and poly (hydroxy Amide) and other polybenzoxazole precursors, poly (hydroxyphenylene) ether, polynaphthol and the like.
- poly (hydroxystyrene) resins such as polyhydroxystyrene and copolymers containing hydroxystyrene as monomer units, phenol resins, and poly (hydroxy Amide) and other polybenzoxazole precursors, poly (hydroxyphenylene) ether, polynaphthol and the like.
- a phenol resin is preferable and a novolac type phenol resin is more preferable because of its low price and small volume shrinkage at the time of curing.
- the phenol resin is a polycondensation product of phenol or a derivative thereof and aldehydes.
- the polycondensation is performed in the presence of a catalyst such as an acid or a base.
- the phenol resin obtained when an acid catalyst is used is referred to as a novolac type phenol resin.
- the novolak type phenol resin include phenol / formaldehyde novolak resin, cresol / formaldehyde novolak resin, xylenol / formaldehyde novolak resin, resorcinol / formaldehyde novolak resin, phenol-naphthol / formaldehyde novolak resin, and the like.
- Examples of the phenol derivative used for obtaining the phenol resin include o-cresol, m-cresol, p-cresol, o-ethylphenol, m-ethylphenol, p-ethylphenol, o-butylphenol, m-butylphenol, p-butylphenol, 2,3-xylenol, 2,4-xylenol, 2,5-xylenol, 2,6-xylenol, 3,4-xylenol, 3,5-xylenol, 2,3,5-trimethylphenol, 3 Alkylphenols such as 1,4,5-trimethylphenol; alkoxyphenols such as methoxyphenol and 2-methoxy-4-methylphenol; alkenylphenols such as vinylphenol and allylphenol; aralkylphenols such as benzylphenol; methoxy Alkoxycarbonylphenol such as rubonylphenol; Arylcarbonylphenol such as benzoyloxyphenol; Halogenated
- the phenol resin may be a product obtained by polycondensing the above-mentioned phenol or phenol derivative with an aldehyde together with a compound other than phenol such as m-xylene.
- the molar ratio of the compound other than phenol to the phenol derivative used for the condensation polymerization is preferably less than 0.5.
- Compounds other than the above-described phenol derivatives and phenol compounds are used singly or in combination of two or more.
- aldehydes used for obtaining a phenol resin include formaldehyde, acetaldehyde, furfural, benzaldehyde, hydroxybenzaldehyde, methoxybenzaldehyde, hydroxyphenylacetaldehyde, methoxyphenylacetaldehyde, crotonaldehyde, chloroacetaldehyde, chlorophenylacetaldehyde, glyceraldehyde, Examples include glyoxylic acid, methyl glyoxylate, phenyl glyoxylate, hydroxyphenyl glyoxylate, formyl acetic acid, methyl formyl acetate, 2-formylpropionic acid, methyl 2-formylpropionate, and the like.
- formaldehyde precursors such as paraformaldehyde and trioxane
- ketones such as acetone, pyruvic acid, levulinic acid, 4-acetylbutyric acid, acetonedicarboxylic acid, and 3,3′-4,4′-benzophenonetetracarboxylic acid You may use for reaction. These are used singly or in combination of two or more.
- poly (hydroxystyrene) -based resin for example, an ethylenically unsaturated double bond of hydroxystyrene introduced with a protecting group is polymerized (vinyl polymerization) in the presence of a catalyst (anion or radical initiator), and further, Those obtained by deprotection can be used.
- a catalyst anion or radical initiator
- branch type poly (hydroxystyrene) such as PHS-B (manufactured by DuPont, trade name) can also be used.
- the weight average molecular weight of the component (A) is preferably from 500 to 150,000, preferably from 500 to 100,000 in consideration of the solubility in an alkaline aqueous solution and the balance between the photosensitive properties and the mechanical properties of the pattern cured film. More preferred is 1,000 to 50,000.
- the weight average molecular weight is a value obtained by measuring by a gel permeation chromatography method and converting from a standard polystyrene calibration curve.
- the component (A) may contain a phenol resin (A1) having no unsaturated hydrocarbon group and a modified phenol resin (A2) having an unsaturated hydrocarbon group. Furthermore, the component (A2) may be modified by a reaction between a phenolic hydroxyl group and a polybasic acid anhydride. By containing the component (A2), the adhesion and thermal shock resistance of the cured film are improved.
- the component (A2) is generally a reaction product of a phenol or a derivative thereof and a compound having an unsaturated hydrocarbon group (hereinafter sometimes simply referred to as “unsaturated hydrocarbon group-containing compound”) (hereinafter referred to as “unsaturated hydrocarbon”). It may be a polycondensation product of a group-modified phenol derivative ”) and an aldehyde.
- unsaturated hydrocarbon group-containing compound hereinafter sometimes simply referred to as “unsaturated hydrocarbon group-containing compound”
- It may be a polycondensation product of a group-modified phenol derivative ”) and an aldehyde.
- A2 As a phenol derivative and aldehydes used in order to obtain a component, the thing similar to the phenol derivative and aldehydes used in order to obtain the phenol resin mentioned above can be used.
- the unsaturated hydrocarbon group of the unsaturated hydrocarbon group-containing compound preferably contains two or more unsaturated bonds from the viewpoint of the adhesion of the pattern cured film and the thermal shock resistance, and the storage stability of the resin composition From the viewpoint, the number of unsaturated bonds included is preferably 30 or less. Further, from the viewpoint of compatibility when the resin composition is used and the flexibility of the cured film, the unsaturated hydrocarbon group-containing compound preferably has 4 to 100 carbon atoms, more preferably 8 to 80 carbon atoms. Those having 10 to 60 carbon atoms are more preferable.
- Examples of the unsaturated hydrocarbon group-containing compound include polybutadiene having a carboxy group, epoxidized polybutadiene, linoleyl alcohol, oleyl alcohol, unsaturated fatty acid, unsaturated fatty acid ester, and the like.
- Suitable unsaturated fatty acids include, for example, crotonic acid, myristoleic acid, palmitoleic acid, oleic acid, elaidic acid, vaccenic acid, gadoleic acid, erucic acid, nervonic acid, linoleic acid, ⁇ -linolenic acid, eleostearic acid , Stearidonic acid, arachidonic acid, eicosapentaenoic acid, sardine acid, docosahexaenoic acid and the like.
- unsaturated fatty acid esters are preferable and vegetable oils that are unsaturated fatty acid esters are more preferable because of compatibility with the base resin and mechanical properties.
- Vegetable oils are generally esters of glycerin and unsaturated fatty acids, and include non-drying oils having an iodine value of 100 or less, semi-drying oils exceeding 100 and less than 130, and drying oils of 130 or more.
- non-drying oils include olive oil, Asa seed oil, Japanese cabbage seed oil, potato oil, camellia oil, castor oil, and peanut oil.
- semi-drying oil corn oil, cottonseed oil, sesame oil etc. are mentioned, for example.
- Examples of the drying oil include tung oil, linseed oil, soybean oil, walnut oil, safflower oil, sunflower oil, camellia oil, coconut oil, and the like. Moreover, you may use the processed vegetable oil obtained by processing these vegetable oils.
- a dry oil from the viewpoint of improving the adhesion, mechanical properties and thermal shock resistance of the pattern cured film.
- tung oil, linseed oil, soybean oil, walnut oil, or safflower oil is more preferable, and tung oil or linseed oil is more preferable because the above-described effects can be more effectively and reliably exhibited.
- These vegetable oils are used alone or in combination of two or more.
- (A2) In preparing the component, first, the phenol derivative and the unsaturated hydrocarbon group-containing compound are reacted to prepare an unsaturated hydrocarbon group-modified phenol derivative.
- the above reaction is usually preferably carried out at 50 to 130 ° C.
- the blending ratio of the phenol derivative and the unsaturated hydrocarbon group-containing compound can improve the flexibility of the patterned cured film, so that the unsaturated hydrocarbon group-containing compound 1 to 100 with respect to 100 parts by mass of the phenol derivative.
- the amount is preferably part by mass, and more preferably 5 to 50 parts by mass.
- p-toluenesulfonic acid, trifluoromethanesulfonic acid or the like may be used as a catalyst.
- the reaction between the aldehydes and the unsaturated hydrocarbon group-modified phenol derivative is a polycondensation reaction, and conventionally known synthesis conditions for phenol resins can be used.
- the component (A2) is a polycondensation with aldehydes by combining a compound obtained by reacting the above-mentioned phenol derivative with an unsaturated hydrocarbon group-containing compound and a compound other than phenol such as m-xylene. Can also be obtained.
- the unsaturated hydrocarbon group of (A2) component exists in ortho position or para position with respect to the phenolic hydroxyl group which a phenol resin has, and it is more preferable to exist in para position.
- the component (A2) can also be obtained by reacting the above-mentioned phenol resin with an unsaturated hydrocarbon group-containing compound.
- the reaction between the phenol resin and the unsaturated hydrocarbon group-containing compound is usually preferably carried out at 50 to 130 ° C.
- the blending ratio of the phenol resin and the unsaturated hydrocarbon group-containing compound can improve the flexibility of the cured film, so that the unsaturated hydrocarbon group-containing compound 1 to 100 parts by mass of the phenol resin.
- the amount is preferably 100 parts by mass, more preferably 5 to 50 parts by mass.
- p-toluenesulfonic acid, trifluoromethanesulfonic acid or the like may be used as a catalyst.
- solvents such as toluene, xylene, methanol, tetrahydrofuran, can be used for reaction.
- a phenolic resin that is acid-modified by reacting a polybasic acid anhydride with a phenolic hydroxyl group present in the modified phenolic resin having an unsaturated hydrocarbon group produced by the method as described above is used as the component (A2).
- Carboxy group is introduce
- the polybasic acid anhydride is not particularly limited as long as it has an acid anhydride group formed by dehydration condensation of a carboxy group of a polybasic acid having a plurality of carboxy groups.
- the polybasic acid anhydride include phthalic anhydride, succinic anhydride, octenyl succinic anhydride, pentadodecenyl succinic anhydride, maleic anhydride, itaconic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methyltetrahydrophthalic anhydride Acids, dibasic acid anhydrides such as methylhexahydrophthalic anhydride, nadic anhydride, 3,6-endomethylenetetrahydrophthalic anhydride, methylendomethylenetetrahydrophthalic anhydride, tetrabromophthalic anhydride and trimellitic anhydride, biphenyl Tetracarboxylic
- the polybasic acid anhydride is preferably a dibasic acid anhydride, and more preferably at least one selected from the group consisting of tetrahydrophthalic anhydride, succinic anhydride, and hexahydrophthalic anhydride.
- the polybasic acid anhydride is preferably a dibasic acid anhydride, and more preferably at least one selected from the group consisting of tetrahydrophthalic anhydride, succinic anhydride, and hexahydrophthalic anhydride.
- the reaction between the phenolic hydroxyl group in the modified phenol resin having an unsaturated hydrocarbon group and the polybasic acid anhydride can be carried out at 50 to 130 ° C. In this reaction, it is preferable to react 0.1 to 0.8 mol of polybasic acid anhydride with respect to 1 mol of phenolic hydroxyl group, more preferably 0.15 to 0.6 mol. More preferably, the reaction is carried out at 2 to 0.4 mol. If the polybasic acid anhydride is less than 0.1 mol, the developability tends to decrease, and if it exceeds 0.8 mol, the alkali resistance of the unexposed area tends to decrease.
- the catalyst include tertiary amines such as triethylamine, quaternary ammonium salts such as triethylbenzylammonium chloride, imidazole compounds such as 2-ethyl-4-methylimidazole, and phosphorus compounds such as triphenylphosphine.
- the acid value of the phenol resin further modified with polybasic acid anhydride is preferably 30 to 200 mgKOH / g, more preferably 40 to 170 mgKOH / g, and further preferably 50 to 150 mgKOH / g. .
- the acid value is 30 mgKOH / g or more, alkali development tends to be completed in a short time, and when it is 200 mgKOH / g or less, the developer resistance of the unexposed portion tends to be improved.
- the molecular weight of the component (A2) is preferably 1,000 to 500,000, preferably 2,000 to 200,000 in terms of weight average molecular weight in consideration of the solubility in alkaline aqueous solution and the balance between the photosensitive properties and the mechanical properties of the pattern cured film. 000 is more preferable, and 2,000 to 100,000 is more preferable.
- the weight average molecular weight is a value obtained by measuring by a gel permeation chromatography method and converting from a standard polystyrene calibration curve.
- the photosensitive resin composition is used by mixing the modified phenol resin (A2) having an unsaturated hydrocarbon group as the component (A), the phenol resin (A1) having no unsaturated hydrocarbon group,
- the total amount with the modified phenol resin (A2) having a hydrocarbon group is 100, and the mass ratio is preferably 5:95 to 95: 5 for the former: the latter, and 10:90 to 90:10. More preferably, it is more preferably included at 15:85 to 85:15.
- the mass ratio is 5:95 to 95: 5
- ⁇ (B) component Compound that generates acid by light>
- generates an acid with the light which is (B) component is used as a photosensitive agent.
- the component (B) has a function of generating an acid by light irradiation and increasing the solubility of the light-irradiated portion in the alkaline aqueous solution.
- a compound generally called a photoacid generator can be used as the component (B).
- the component (B) include o-quinonediazide compounds, aryldiazonium salts, diaryliodonium salts, triarylsulfonium salts, and the like. Of these, o-quinonediazide compounds are preferred because of their high sensitivity.
- the o-quinonediazide compound can be obtained, for example, by a method in which o-quinonediazidesulfonyl chloride, a hydroxy compound, an amino compound, and the like are subjected to a condensation reaction in the presence of a dehydrochlorinating agent.
- Examples of the o-quinonediazide sulfonyl chloride used in the reaction include benzoquinone-1,2-diazide-4-sulfonyl chloride, 1,2-naphthoquinone-2-diazide-5-sulfonyl chloride, and 1,2-naphthoquinone-2- And diazide-4-sulfonyl chloride.
- hydroxy compound used in the reaction examples include hydroquinone, resorcinol, pyrogallol, bisphenol A, bis (4-hydroxyphenyl) methane, 2,2-bis (4-hydroxyphenyl) hexafluoropropane, 2,3,4- Trihydroxybenzophenone, 2,3,4,4′-tetrahydroxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, 2,3,4,2 ′, 3′-pentahydroxybenzophenone, 2,3 , 4,3 ′, 4 ′, 5′-hexahydroxybenzophenone, bis (2,3,4-trihydroxyphenyl) methane, bis (2,3,4-trihydroxyphenyl) propane, 4b, 5,9b, 10-tetrahydro-1,3,6,8-tetrahydroxy-5,10-dimethyl Ndeno [2,1-a] indene, tris (4-hydroxyphenyl) methane, tris (4-hydroxyphenyl) ethane, tri
- amino compounds used in the reaction include p-phenylenediamine, m-phenylenediamine, 4,4′-diaminodiphenyl ether, 4,4′-diaminodiphenylmethane, 4,4′-diaminodiphenylsulfone, and 4,4 ′.
- -Diaminodiphenyl sulfide o-aminophenol, m-aminophenol, p-aminophenol, 3,3'-diamino-4,4'-dihydroxybiphenyl, 4,4'-diamino-3,3'-dihydroxybiphenyl, Bis (3-amino-4-hydroxyphenyl) propane, bis (4-amino-3-hydroxyphenyl) propane, bis (3-amino-4-hydroxyphenyl) sulfone, bis (4-amino-3-hydroxyphenyl) Sulfone, bis (3-amino-4-hydroxyphene Le) hexafluoropropane, bis (4-amino-3-hydroxyphenyl) hexafluoropropane, and the like.
- 1,1-bis (4-hydroxyphenyl) -1- [4- ⁇ 1- (4-hydroxyphenyl) -1-methylethyl ⁇ phenyl] ethane and 1 2-naphthoquinone-2-diazide-5-sulfonyl chloride, or tris (4-hydroxyphenyl) methane or tris (4-hydroxyphenyl) ethane and 1,2-naphthoquinone-2- It is preferable to use a product obtained by condensation reaction with diazide-5-sulfonyl chloride.
- Examples of the dehydrochlorinating agent used in the reaction include sodium carbonate, sodium hydroxide, sodium hydrogen carbonate, potassium carbonate, potassium hydroxide, trimethylamine, triethylamine, pyridine and the like.
- As the reaction solvent for example, dioxane, acetone, methyl ethyl ketone, tetrahydrofuran, diethyl ether, N-methylpyrrolidone and the like are used.
- o-Quinonediazidesulfonyl chloride and hydroxy compound and / or amino compound are blended so that the total number of moles of hydroxy group and amino group is 0.5 to 1 per mole of o-quinonediazidesulfonyl chloride. It is preferred that A preferred blending ratio of the dehydrochlorinating agent and o-quinonediazidesulfonyl chloride is in the range of 0.95 / 1 molar equivalent to 1 / 0.95 molar equivalent.
- the preferred reaction temperature for the above reaction is 0 to 40 ° C., and the preferred reaction time is 1 to 10 hours.
- the content of the component (B) is preferably 3 to 100 parts by mass with respect to 100 parts by mass of the component (A) from the viewpoint that the difference in dissolution rate between the exposed part and the unexposed part increases and the sensitivity becomes better. From the viewpoint of suppressing residues after development, the content is more preferably 5 to 50 parts by mass, further preferably 5 to 30 parts by mass, and particularly preferably 5 to 15 parts by mass.
- the acrylic resin having a group (reactive group) that crosslinks the component (A) which is the component (C) is excellent in compatibility with the component (A), so that good developability is obtained and the resin film is cured.
- the reactive group of the component (C) is cross-linked with the phenolic hydroxyl group of the component (A), and the effect of suppressing pattern melt is obtained.
- the reactive group of component (C) is preferably present in the molecule.
- the acrylic resin containing a reactive group for example, an acrylic resin containing a structural unit represented by the following general formula (1) is preferable. [In General Formula (1), R 1 represents a hydrogen atom or a methyl group, and R 2 represents an organic group having a group (reactive group) that crosslinks with the component (A). ]
- Examples of the group that crosslinks with the component (A) include an oxazoline group, an isocyanate group, a blocked isocyanate group, an oxetane group, and an epoxy group. Among these, from the viewpoint of development contrast and low temperature curability, an epoxy group is preferable. preferable.
- Examples of the organic group having a group that crosslinks with the component (A) include a glycidyl group, a glycidyloxybutyl group, and a 3,4-epoxycyclohexyl group.
- Examples of the polymerizable monomer that gives the structural unit represented by the general formula (1) include glycidyl acrylate, glycidyl methacrylate, 4-hydroxybutyl acrylate glycidyl ether, (3,4-epoxycyclohexyl) methyl acrylate, (3 , 4-epoxycyclohexyl) methyl methacrylate and the like.
- glycidyl acrylate and 4-hydroxybutyl acrylate glycidyl ether are more preferable from the viewpoint of developability, and glycidyl methacrylate is further preferable from the viewpoint of mechanical characteristics.
- the composition ratio of the structural unit represented by the general formula (1) is preferably 1 to 25 mol% with respect to the total amount of the component (C). More preferably, it is 20 mol%, more preferably 5 to 15 mol%.
- the composition ratio of the structural unit represented by the general formula (1) is 1 to 25 mol%, the cured film physical properties and melt resistance of the photosensitive resin composition can be further improved. From the viewpoint of lowering the haze value (cloudiness), it is particularly preferably 1 to 10 mol%.
- the acrylic resin having a group (reactive group) that crosslinks with the component (A) as the component (C) further includes a structural unit represented by the following general formula (2) from the viewpoint of improving mechanical properties. May be.
- R 3 represents a hydrogen atom or a methyl group
- R 4 represents an alkyl group having 4 to 20 carbon atoms.
- Examples of the alkyl group having 4 to 20 carbon atoms represented by R 4 include butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, Examples include tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group, and structural isomers thereof.
- Examples of the polymerizable monomer that gives the structural unit represented by the general formula (2) include butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, and (meth) acrylic acid.
- the composition ratio of the structural unit represented by the general formula (2) is preferably 50 to 95 mol% with respect to the total amount of the component (C), It is more preferably 90 mol%, and further preferably 60 to 85 mol%.
- the acrylic resin having a group (reactive group) that crosslinks with the component (A) which is the component (C) is represented by the following formula (3) or (4) from the viewpoint of solubility in an alkali developer.
- a structural unit may be included.
- Examples of the polymerizable monomer that gives the structural unit represented by the above formula (3) include acrylic acid, and examples of the polymerizable monomer that gives the structural unit represented by the above formula (4) include methacrylic acid. It is done.
- the composition ratio of the structural unit represented by the above formula (3) or (4) is preferably 1 to 30 mol% with respect to the total amount of the component (C).
- the content is more preferably 3 to 28 mol%, further preferably 5 to 25 mol%.
- the acrylic resin having a group (reactive group) that crosslinks with the component (A) which is the component (C) is compatible with the component (A), adhesion of the pattern cured film to the substrate, mechanical properties and heat resistance.
- a structural unit represented by the following general formula (5) may be included.
- the component (C) having the structural unit represented by the general formula (5) has better interaction with the alkali-soluble resin (A) having a phenolic hydroxyl group, and the compatibility is further improved.
- R 6 represents a hydrogen atom or a methyl group
- R 5 represents a monovalent organic group having a primary, secondary, or tertiary amino group.
- the reaction between the reactive group of the component (C) and the reactive group of the component (C) can be promoted without causing an addition reaction with the reactive group (epoxy group, etc.) of the component (C).
- the structural unit represented by the general formula (5) preferably has a tertiary amino group.
- Examples of the polymerizable monomer that gives the structural unit represented by the general formula (5) include aminoethyl (meth) acrylate, N-methylaminoethyl (meth) acrylate, N, N-dimethylaminoethyl (meth).
- R 5 is a monovalent group represented by the following general formula (6).
- the organic group is particularly preferable.
- X represents an alkylene group having 1 to 5 carbon atoms
- R 7 to R 11 each independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms
- m represents 0 to 10 carbon atoms. Indicates an integer.
- examples of the polymerizable monomer giving a structural unit in which R 5 is a monovalent organic group represented by the general formula (6) include piperidin-4-yl (meth) acrylate. 1-methylpiperidin-4-yl (meth) acrylate, 2,2,6,6-tetramethylpiperidin-4-yl (meth) acrylate, 1,2,2,6,6-pentamethylpiperidin-4- Il (meth) acrylate, (piperidin-4-yl) methyl (meth) acrylate, 2- (piperidin-4-yl) ethyl (meth) acrylate and the like.
- 1,2,2,6,6-pentamethylpiperidin-4-yl methacrylate is FA-711MM
- 2,2,6,6-tetramethylpiperidin-4-yl methacrylate is FA-712HM. (Both manufactured by Hitachi Chemical Co., Ltd.) are commercially available.
- the composition ratio is 0.3 to 10 mol% with respect to the total amount of the component (C). It is preferably 0.4 to 8 mol%, more preferably 0.5 to 7 mol%.
- (C) component may contain the structural unit represented by following General formula (7) from a viewpoint which can improve a sensitivity more.
- R 12 represents a hydrogen atom or a methyl group
- Y represents an alkylene group having 1 to 5 carbon atoms
- R 13 to R 17 each independently represents an alkyl group having 1 to 6 carbon atoms.
- P represents an integer of 1 to 100.
- Examples of the polymerizable monomer that gives the structural unit represented by the general formula (7) include methacryl-modified silicone oil and the like. X-22-174DX, X-22-2426, X-22-2475 ( Both are commercially available as Shin-Etsu Chemical Co., Ltd.).
- the composition ratio is 1 to 10 mol% with respect to the total amount of the component (C). It is preferably 2 to 5 mol%, more preferably 3 to 5 mol%.
- combination of the acrylic resin which comprises (C) component is general formula (1), (2), (3), (4), (5), (6) or ( It may further contain a polymerizable monomer other than the polymerizable monomer that gives each structural unit represented by 7).
- polymerizable monomers examples include styrene, ⁇ -methylstyrene, benzyl (meth) acrylate, 4-methylbenzyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, (meth) Esters of vinyl alcohol such as 2-hydroxypropyl acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, acrylonitrile, vinyl-n-butyl ether, tetrahydrofurfuryl (meth) acrylate , Glycidyl (meth) acrylate, 2,2,2-trifluoroethyl (meth) acrylate, 2,2,3,3-tetrafluoropropyl (meth) acrylate, (meth) acrylic acid, ⁇ -bromo (meth) Acrylic acid, ⁇ -chloro (meth) acrylic acid, ⁇ -furyl (meth) acrylic , ⁇ -styryl (
- the weight average molecular weight of the component (C) is preferably 2,000 to 100,000, more preferably 3,000 to 60,000, and further preferably 4,000 to 50,000. .
- the weight average molecular weight is 2,000 or more, the thermal shock resistance of the cured film tends to be improved, and when it is 100,000 or less, the compatibility with the component (A) and the developability tend to be improved.
- the molecular weight is particularly preferably 4,000 to 9,000.
- the content of the component (C) is preferably 1 to 50 parts by mass, preferably 3 to 40 parts by mass with respect to 100 parts by mass of the total amount of the component (A), from the viewpoints of adhesion, mechanical properties, thermal shock resistance and photosensitive properties. Is more preferable, and 5 to 30 parts by mass is particularly preferable.
- the reactive group of (C) component can be confirmed by using a well-known method. For example, it can be confirmed by using 13 C NMR, 1 H NMR, gas chromatography or the like.
- the photosensitive resin composition according to this embodiment may further contain a thermal crosslinking agent as the component (D).
- the thermal crosslinking agent is a compound having a structure capable of reacting with the component (A) to form a bridge structure when the photosensitive resin film after pattern formation is cured by heating. Thereby, the brittleness of the film and the melting of the film can be prevented.
- the thermal crosslinking agent it is preferable to use a compound having a phenolic hydroxyl group, a compound having a hydroxymethylamino group, or a compound having an epoxy group.
- the compound having a phenolic hydroxyl group used as a thermal crosslinking agent is different from the component (A), and specific structures thereof include those described later.
- Such a compound having a phenolic hydroxyl group is preferable not only as a thermal cross-linking agent but also because it can increase the dissolution rate of the exposed area when developing with an alkaline aqueous solution and improve the sensitivity.
- the number average molecular weight of such a compound having a phenolic hydroxyl group is preferably 2,000 or less.
- the number average molecular weight is preferably 94 to 2,000, more preferably 108 to 2,000, and even more preferably 108 to 1,500.
- a conventionally known compound can be used, but the compound represented by the following general formula (8) is effective in promoting the dissolution of the exposed portion and curing the photosensitive resin film. It is preferable because of the excellent balance of the effects of preventing melting at the time.
- X represents a single bond or a divalent organic group
- R 18 , R 19 , R 20 and R 21 each independently represents a hydrogen atom or a monovalent organic group
- s and t are Each independently represents an integer of 1 to 3
- u and v each independently represent an integer of 0 to 4.
- the compound in which X is a single bond is a biphenol (dihydroxybiphenyl) derivative.
- the divalent organic group represented by X include an alkylene group having 1 to 10 carbon atoms such as a methylene group, an ethylene group and a propylene group, an alkylidene group having 2 to 10 carbon atoms such as an ethylidene group, Arylene groups having 6 to 30 carbon atoms such as phenylene groups, groups in which some or all of the hydrogen atoms of these hydrocarbon groups are substituted with halogen atoms such as fluorine atoms, sulfonyl groups, carbonyl groups, ether bonds, thioether bonds, An amide bond etc. are mentioned.
- Examples of the compound having a hydroxymethylamino group include (poly) (N-hydroxymethyl) melamine, (poly) (N-hydroxymethyl) glycoluril, (poly) (N-hydroxymethyl) benzoguanamine, (poly) ( N-hydroxymethyl) urea and the like nitrogen-containing compounds obtained by alkyl etherifying all or part of active methylol groups.
- examples of the alkyl group of the alkyl ether include a methyl group, an ethyl group, a butyl group, or a mixture thereof, and may contain an oligomer component that is partially self-condensed.
- Examples of these include hexakis (methoxymethyl) melamine, hexakis (butoxymethyl) melamine, tetrakis (methoxymethyl) glycoluril, tetrakis (butoxymethyl) glycoluril, tetrakis (methoxymethyl) urea and the like.
- a conventionally known compound can be used as the compound having an epoxy group.
- bisphenol A type epoxy resin bisphenol F type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, alicyclic epoxy resin, glycidyl amine, heterocyclic epoxy resin, polyalkylene glycol diglycidyl ether, etc. It is done.
- hydroxymethyl such as bis [3,4-bis (hydroxymethyl) phenyl] ether, 1,3,5-tris (1-hydroxy-1-methylethyl) benzene
- Aromatic compounds having a group compounds having a maleimide group, such as bis (4-maleimidophenyl) methane, 2,2-bis [4- (4′-maleimidophenoxy) phenyl] propane, compounds having a norbornene skeleton, polyfunctional
- An acrylate compound, a compound having an oxetanyl group, a compound having a vinyl group, a blocked isocyanate compound, or the like can be used.
- a compound having a phenolic hydroxyl group or a compound having a hydroxymethylamino group is preferable, and from the point that the resolution and elongation of the coating film can be further improved, More preferred are compounds having a hydroxymethylamino group, more preferred are compounds having an alkoxymethylamino group in which all or part of the hydroxymethylamino group is alkyletherified, and alkoxymethylamino in which all of the hydroxymethylamino group is alkyletherified. A compound having a group is particularly preferred.
- R 22 to R 27 each independently represents an alkyl group having 1 to 10 carbon atoms.
- the difference in dissolution rate between the exposed part and the unexposed part is increased, the sensitivity becomes better, and the characteristics of the cured film (A) 100 parts by weight of the component Is preferably 1 to 50 parts by mass, more preferably 2 to 30 parts by mass, and still more preferably 3 to 25 parts by mass.
- the thermal crosslinking agent mentioned above is used individually by 1 type or in combination of 2 or more types.
- the photosensitive resin composition concerning this embodiment may further contain the acrylic resin which does not contain the group which bridge
- the acrylic resin is preferably an acrylic resin having a structural unit represented by the following general formula (10) or (11).
- the thermal shock resistance can be improved while maintaining good photosensitive characteristics.
- a component may consist only of 1 type of the said acrylic resin, and may contain 2 or more types. [In the formulas (10) and (11), R 28 represents an alkyl group having 4 to 20 carbon atoms, and R 29 represents a hydrogen atom or a methyl group. ]
- R 28 is preferably an alkyl group having 4 to 16 carbon atoms from the viewpoint of improving sensitivity, resolution, and thermal shock resistance, and an alkyl group having 4 carbon atoms, particularly an n-butyl group. More preferred.
- Examples of the polymerizable monomer that gives the structural unit represented by the general formula (10) include (meth) acrylic acid alkyl esters.
- Examples of the (meth) acrylic acid alkyl ester include compounds represented by the following general formula (12).
- CH 2 C (R 30 ) -COOR 31 (12)
- R 30 represents a hydrogen atom or a methyl group
- R 31 represents an alkyl group having 4 to 20 carbon atoms.
- Examples of the alkyl group having 4 to 20 carbon atoms represented by R 31 include butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, Examples include tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group, and structural isomers thereof.
- Examples of the polymerizable monomer represented by the general formula (12) include butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, (meth ) Octyl acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, tetradecyl (meth) acrylate, (meth) Examples include pentadecyl acrylate, hexadecyl (meth) acrylate, heptadecyl (meth) acrylate, octadecyl (meth) acrylate, nonadecyl (meth) acrylate, eicosyl (meth) acrylate, and the like. These polyme
- the composition ratio of the structural unit represented by the general formula (10) is preferably 50 to 95 mol%, and 60 to 90 mol% with respect to the total amount of the component (E). More preferably, it is more preferably 70 to 85 mol%.
- the composition ratio of the structural unit represented by the general formula (10) is 50 to 95 mol%, the thermal shock resistance of the cured film of the photosensitive resin composition can be further improved.
- examples of the polymerizable monomer that gives the structural unit represented by the general formula (11) include acrylic acid and methacrylic acid.
- the composition ratio of the structural unit represented by the general formula (11) is preferably 5 to 35 mol% with respect to the total amount of the component (E). It is more preferably 10 to 30 mol%, and further preferably 15 to 25 mol%.
- the composition ratio of the structural unit represented by the general formula (11) is 5 to 35 mol%, the compatibility with the component (A) and the developability of the photosensitive resin composition can be further improved. .
- the component (E) is represented by the general formula (10). It is more preferable to contain the acrylic resin which has a structural unit, the structural unit represented by said (11), and the structural unit represented by following General formula (13).
- the component (E) is the acrylic resin, the interaction between the component (E) and the alkali-soluble resin (A) having a phenolic hydroxyl group is improved, and the compatibility is further improved.
- R 32 represents a hydrogen atom or a methyl group
- R 33 represents a monovalent organic group having a primary, secondary or tertiary amino group.
- Examples of the polymerizable monomer that gives the structural unit represented by the general formula (13) include aminoethyl (meth) acrylate, N-methylaminoethyl (meth) acrylate, and N, N-dimethylaminoethyl (meth).
- R 33 is a monovalent group represented by the following general formula (14).
- An organic group is preferred.
- X represents an alkylene group having 1 to 5 carbon atoms
- R 34 to R 38 each independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms
- m represents 0 to 10 carbon atoms. Indicates an integer.
- examples of the polymerizable monomer that gives a structural unit in which R 33 is a monovalent organic group represented by the general formula (14) include piperidin-4-yl (meth). Acrylate, 1-methylpiperidin-4-yl (meth) acrylate, 2,2,6,6-tetramethylpiperidin-4-yl (meth) acrylate, 1,2,2,6,6-pentamethylpiperidine-4 -Yl (meth) acrylate, (piperidin-4-yl) methyl (meth) acrylate, 2- (piperidin-4-yl) ethyl (meth) acrylate and the like.
- 1,2,2,6,6-pentamethylpiperidin-4-yl methacrylate is FA-711MM
- 2,2,6,6-tetramethylpiperidin-4-yl methacrylate is FA-712HM. (Both manufactured by Hitachi Chemical Co., Ltd.) are commercially available.
- the composition ratio of the structural unit represented by the general formula (13) is preferably 0.3 to 10 mol% with respect to the total amount of the component (E). It is more preferably 0.4 to 8 mol%, and further preferably 0.5 to 7 mol%.
- (E) component may contain the acrylic resin which has a structural unit represented by following General formula (15) from a viewpoint which can improve a sensitivity more.
- R 39 represents a hydrogen atom or a methyl group
- Y represents an alkylene group having 1 to 5 carbon atoms
- R 40 to R 44 each independently represents an alkyl group having 1 to 6 carbon atoms.
- P represents an integer of 1 to 100.
- Examples of the polymerizable monomer that gives the structural unit represented by the general formula (15) include methacryl-modified silicone oil and the like. X-22-174DX, X-22-2426, X-22-2475 ( Both are commercially available as Shin-Etsu Chemical Co., Ltd.).
- the composition ratio of the structural unit represented by the general formula (15) is preferably 1 to 10 mol% with respect to the total amount of the component (E). It is more preferably 5 mol%, and further preferably 3 to 5 mol%.
- the polymerizable monomer used for the synthesis of the acrylic resin constituting the component (E) is a polymerization that gives each structural unit represented by the general formula (10), (11), (13) or (15)
- a polymerizable monomer other than the polymerizable monomer may further be included.
- Such polymerizable monomers include styrene, ⁇ -methylstyrene, benzyl (meth) acrylate, 4-methylbenzyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, and (meth) acrylic acid.
- esters of vinyl alcohol such as 2-hydroxypropyl, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, acrylonitrile, vinyl-n-butyl ether, tetrahydrofurfuryl (meth) acrylate, ( Glycidyl (meth) acrylate, 2,2,2-trifluoroethyl (meth) acrylate, 2,2,3,3-tetrafluoropropyl (meth) acrylate, (meth) acrylic acid, ⁇ -bromo (meth) acrylic acid , ⁇ -Chlor (meth) acrylic acid, ⁇ -furyl (meth) acrylic acid, ⁇ -su Maleic acid monoesters such as tyryl (meth) acrylic acid, maleic acid, maleic anhydride, monomethyl maleate, monoethyl maleate, monoisopropyl maleate, fumaric acid, cinnamic acid, ⁇ -cyanocinnamic acid
- the weight average molecular weight of component (E) is preferably from 2,000 to 100,000, more preferably from 3,000 to 60,000, and even more preferably from 4,000 to 50,000. .
- the weight average molecular weight is 2,000 or more, the thermal shock resistance of the cured film tends to be improved, and when it is 100,000 or less, the compatibility with the component (A) and the developability tend to be improved.
- the content is preferably 1 to 50 parts by mass with respect to 100 parts by mass of the total amount of the component (A) from the viewpoint of adhesion, mechanical properties, thermal shock resistance and photosensitive properties. More preferred is 30 parts by mass, and further more preferred is 5-20 parts by mass.
- the photosensitive resin composition according to this embodiment contains other components such as a thermal acid generator, an elastomer, a solvent, a dissolution accelerator, a dissolution inhibitor, a surfactant or a leveling agent, and an adhesion aid as necessary. be able to.
- the photosensitive resin composition according to the present embodiment may contain a thermal acid generator as the component (F).
- a component is a compound which produces
- most of the component (F) can generate an acid even when irradiated with light, and the use of such a component can increase the solubility of an exposed portion in an alkaline aqueous solution. Therefore, the difference in solubility in the alkaline aqueous solution between the unexposed area and the exposed area is further increased, thereby improving the resolution.
- a compound different from the component (B) is used as the component (F).
- Such a compound that generates an acid by heat is preferably a compound that generates an acid by heating to a temperature of 50 to 200 ° C., for example.
- the compound that generates an acid by heat is, for example, a compound different from the compound that generates an acid by the light of the component (B), and a strong acid such as an onium salt having a function of generating an acid by heat and a base And salts formed from imide sulfonate.
- onium salts examples include diaryl iodonium salts such as aryldiazonium salts and diphenyliodonium salts; di (alkylaryl) iodonium salts such as diaryliodonium salts and di (t-butylphenyl) iodonium salts; trimethylsulfonium salts and the like.
- a dialkyl monoarylsulfonium salt such as dimethylphenylsulfonium salt; a diarylmonoalkyliodonium salt such as diphenylmethylsulfonium salt; a triarylsulfonium salt, and the like.
- di (t-butylphenyl) iodonium salt of paratoluenesulfonic acid di (t-butylphenyl) iodonium salt of trifluoromethanesulfonic acid, trimethylsulfonium salt of trifluoromethanesulfonic acid, dimethyl of trifluoromethanesulfonic acid
- Phenylsulfonium salt diphenylmethylsulfonium salt of trifluoromethanesulfonic acid
- di (t-butylphenyl) iodonium salt of nonafluorobutanesulfonic acid diphenyliodonium salt of camphorsulfonic acid
- diphenyliodonium salt of ethanesulfonic acid benzenesulfonic acid
- Preferred examples include dimethylphenylsulfonium salt and diphenylmethylsulfonium salt of toluenesulfonic acid.
- a sulfonium salt represented by the following general formula (16) is preferable, a trialkylsulfonium salt of methanesulfonic acid is more preferable, and a trimethylsulfonium salt is more preferable.
- R 45 , R 46 and R 47 each independently represents an alkyl group or an aryl group, and R 43 represents a hydrogen atom or a fluorine atom.
- the aryl group is preferably a phenyl group or a phenyl group having a substituent.
- imide sulfonates examples include naphthoyl imide sulfonate and phthalimide sulfonate.
- the content is preferably from 0.1 to 30 parts by weight, more preferably from 0.2 to 20 parts by weight, based on 100 parts by weight of component (A). More preferably, 3 to 10 parts by mass.
- the photosensitive resin composition concerning this embodiment may contain the elastomer as (G) component.
- the obtained resist pattern becomes further excellent in terms of flexibility, and the mechanical characteristics and thermal shock resistance of the resist pattern can be further improved.
- a conventionally known elastomer can be used as the elastomer, but the glass transition temperature (Tg) of the polymer constituting the elastomer is preferably 20 ° C. or lower.
- elastomers examples include styrene elastomers, olefin elastomers, urethane elastomers, polyester elastomers, polyamide elastomers, and silicone elastomers.
- the elastomer may be a fine particle elastomer. These elastomers are used singly or in combination of two or more.
- the photosensitive resin composition concerning this embodiment may contain the silane compound as (H) component from a viewpoint of improving adhesiveness with a board
- silane compounds include ureidopropyltriethoxysilane, vinyltriethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, ⁇ -methacryloxypropyltrimethoxysilane, urea propyltriethoxysilane, and methylphenylsilanediol.
- silane compounds are used alone or in combination of two or more.
- ureidopropyltriethoxysilane, vinyltriethoxysilane, ⁇ -glycidoxypropyltriethoxysilane are reacted with the components (A) and (C) to improve the adhesiveness and elongation at break of the cured product.
- ⁇ -methacryloxypropyltrimethoxysilane, ureapropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane or 3-glycidoxypropyltriethoxysilane are preferred.
- the content is 0.1 to 20 parts by mass with respect to 100 parts by mass of the component (A) from the viewpoint of adhesion to wiring and storage stability of the photosensitive resin composition. It is preferably 0.5 to 10 parts by mass, more preferably 1 to 5 parts by mass.
- the photosensitive resin composition concerning this embodiment may contain the solvent as (I) component from a viewpoint of the applicability
- the solvent include ⁇ -butyrolactone, ethyl lactate, propylene glycol monomethyl ether acetate, benzyl acetate, n-butyl acetate, ethoxyethyl propionate, 3-methylmethoxypropionate, N-methyl-2-pyrrolidone, N , N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, hexamethylphosphorylamide, tetramethylene sulfone, diethyl ketone, diisobutyl ketone, methyl amyl ketone, cyclohexanone, propylene glycol monomethyl ether, propylene glycol monopropyl ether
- the photosensitive resin composition according to the present embodiment may contain a dissolution accelerator as the component (J).
- a dissolution accelerator By containing a dissolution accelerator, it is possible to increase the dissolution rate of the exposed area when the pattern resin film is developed with an alkaline aqueous solution, thereby improving the sensitivity and resolution.
- a conventionally well-known thing can be used as a dissolution promoter. Specific examples thereof include compounds having a carboxy group, a sulfonic acid, and a sulfonamide group.
- the content when such a dissolution accelerator is contained can be determined by the dissolution rate of the pattern resin film in the alkaline aqueous solution. For example, the content is 0.01 to 30 with respect to 100 parts by mass of the component (A). It is preferable to set it as a mass part.
- the photosensitive resin composition concerning this embodiment may contain the dissolution inhibitor as (K) component.
- the (K) dissolution inhibitor is a compound that inhibits the solubility of the component (A) in an alkaline aqueous solution, and is used to control the remaining film thickness, development time, contrast, and the like. Specific examples thereof include diphenyliodonium nitrate, bis (p-tert-butylphenyl) iodonium nitrate, diphenyliodonium bromide, diphenyliodonium chloride, diphenyliodonium iodide and the like.
- the content is preferably 0.01 to 20 parts by mass, preferably 0.01 to 20 parts by mass with respect to 100 parts by mass of the total amount of component (A), from the viewpoints of sensitivity and tolerance of development time. 15 parts by mass is more preferable, and 0.05 to 10 parts by mass is further preferable.
- the photosensitive resin composition concerning this embodiment may contain surfactant or a leveling agent as (L) component.
- surfactant or leveling agent examples include polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octylphenol ether, and the like.
- the component (L) When the component (L) is contained, the content thereof is preferably 0.001 to 5 parts by mass, more preferably 0.01 to 3 parts by mass with respect to 100 parts by mass of the component (A).
- the photosensitive resin composition according to this embodiment can be developed using an aqueous alkaline solution such as tetramethylammonium hydroxide (TMAH). Furthermore, by using the above-described photosensitive resin composition, it is possible to form a patterned cured film having good adhesion and crack resistance in a thermal shock cycle.
- TMAH tetramethylammonium hydroxide
- the photosensitive resin composition according to this embodiment has good photosensitive properties (sensitivity and resolution), pattern melt resistance, and sufficient mechanical properties (breaking elongation and elastic modulus).
- the photosensitive resin composition according to this embodiment is generally a positive photosensitive resin composition, but is not limited thereto.
- the method for producing a patterned cured film generally includes a step of forming the photosensitive resin film by applying and drying the above-described photosensitive resin composition on a support substrate (film formation step), and a photosensitive resin.
- a step of exposing the film (exposure step), a step of developing the exposed photosensitive resin film with an alkaline aqueous solution to form a pattern resin film (development step), and a step of heating the pattern resin film (heating) Process).
- the photosensitive resin composition described above is spin-coated using a spinner or the like on a support substrate such as a glass substrate, a semiconductor, a metal oxide insulator (for example, TiO 2 or SiO 2 ), or silicon nitride. To do.
- the applied photosensitive resin composition is dried by heating using a hot plate, oven or the like. Thereby, the film (photosensitive resin film) of the photosensitive resin composition is formed on the substrate.
- the photosensitive resin film formed on the substrate is irradiated with actinic rays such as ultraviolet rays, visible rays, and radiations through a mask. Since the component (A) has high transparency to i-line, i-line irradiation can be suitably used.
- post-exposure heating PEB
- the post-exposure heating temperature is preferably 70 to 140 ° C., and the post-exposure heating time is preferably 1 to 5 minutes.
- the photosensitive resin film is patterned by removing the exposed portion of the photosensitive resin film after the exposure process with a developer.
- a developer for example, an alkaline aqueous solution such as sodium hydroxide, potassium hydroxide, sodium silicate, ammonia, ethylamine, diethylamine, triethylamine, triethanolamine, tetramethylammonium hydroxide (TMAH) is preferably used.
- the base concentration of these aqueous solutions is preferably 0.1 to 10% by mass.
- an alcohol or a surfactant can be added to the developer.
- Each of these can be blended in an amount of preferably 0.01 to 10 parts by mass, more preferably 0.1 to 5 parts by mass with respect to 100 parts by mass of the developer.
- the patterned photosensitive resin film is referred to as a pattern resin film.
- the photosensitive resin composition is cured by heating the pattern resin film.
- a film obtained by curing the pattern resin film is referred to as a pattern cured film.
- the heating temperature is preferably 250 ° C. or lower, more preferably 225 ° C. or lower, and further preferably 140 to 200 ° C. from the viewpoint of sufficiently preventing damage to the electronic device due to heat.
- the heat treatment can be performed using an oven such as a quartz tube furnace, a hot plate, rapid thermal annealing, a vertical diffusion furnace, an infrared curing furnace, an electron beam curing furnace, a microwave curing furnace, or the like.
- the heating time in the heating step may be a time sufficient for the photosensitive resin composition to cure, but is preferably approximately 5 hours or less in view of work efficiency.
- the heating can also be performed using a microwave curing device or a frequency variable microwave curing device.
- a photosensitive resin composition having good photosensitive properties can be obtained, and a cured pattern film having a good pattern shape can be obtained.
- curing can be performed even at a low temperature of 200 ° C. or lower in the above heating step that conventionally required 300 ° C. or higher.
- the pattern cured film formed from the photosensitive resin composition concerning this embodiment has a high glass transition temperature. Therefore, it becomes a pattern cured film excellent in heat resistance. As a result, an electronic device such as a semiconductor device having excellent reliability can be obtained with high yield and high yield.
- FIG. 1 to 5 are schematic sectional views showing an embodiment of a manufacturing process of a semiconductor device having a multilayer wiring structure.
- the structure 100 shown in FIG. 1 is prepared.
- the structure 100 includes a semiconductor substrate 1 such as a Si substrate having circuit elements, a protective layer 2 such as a silicon oxide film covering the semiconductor substrate 1 having a predetermined pattern from which the circuit elements are exposed, and on the exposed circuit elements.
- the interlayer insulating layer 4 made of polyimide resin or the like formed on the protective layer 2 and the first conductor layer 3 by a spin coating method or the like.
- the photosensitive resin layer 5 is formed, for example, by applying a photosensitive resin such as chlorinated rubber, phenol novolac, polyhydroxystyrene, or polyacrylate ester by a spin coating method.
- the window 6A is formed so that a predetermined portion of the interlayer insulating layer 4 is exposed by a known photolithography technique.
- the photosensitive resin layer 5 is removed to obtain the structure 300 shown in FIG.
- dry etching means using a gas such as oxygen or carbon tetrafluoride can be used.
- the portion of the interlayer insulating layer 4 corresponding to the window portion 6A is selectively removed, and the interlayer insulating layer 4 provided with the window portion 6B so that the first conductor layer 3 is exposed is obtained.
- the photosensitive resin layer 5 is removed using an etching solution that corrodes only the photosensitive resin layer 5 without corroding the first conductor layer 3 exposed from the window 6B.
- the second conductor layer 7 is formed in a portion corresponding to the window portion 6B, and the structure 400 shown in FIG. 4 is obtained.
- a known photolithography technique can be used to form the second conductor layer 7. As a result, the second conductor layer 7 and the first conductor layer 3 are electrically connected.
- the surface protective layer 8 is formed on the interlayer insulating layer 4 and the second conductor layer 7 to obtain the semiconductor device 500 shown in FIG.
- the surface protective layer 8 is formed as follows. First, the photosensitive resin composition according to the above-described embodiment is applied onto the interlayer insulating layer 4 and the second conductor layer 7 by a spin coating method, and dried to form a photosensitive resin film. Next, after light irradiation through a mask on which a pattern corresponding to the window 6C is drawn at a predetermined portion, the photosensitive resin film is patterned by developing with an alkaline aqueous solution. Thereafter, the photosensitive resin film is cured by heating to form a film as the surface protective layer 8.
- the surface protective layer 8 protects the first conductor layer 3 and the second conductor layer 7 from external stress, ⁇ rays, and the like, and the obtained semiconductor device 500 is excellent in reliability.
- the method for manufacturing a semiconductor device having a two-layer wiring structure is shown.
- the above steps are repeated to form each layer.
- the surface protective layer 8 not only the surface protective layer 8 but also the interlayer insulating layer 4 can be formed using the photosensitive resin composition according to the present embodiment.
- the electronic component of this embodiment has a pattern cured film formed by the above-described manufacturing method as an interlayer insulating layer or a surface protective layer.
- the patterned cured film can be used as, for example, a surface protective layer and interlayer insulating layer of a semiconductor device, an interlayer insulating layer of a multilayer wiring board, and the like.
- the electronic component of the present embodiment is not particularly limited except that it has a surface protective layer or an interlayer insulating layer formed using the above-described photosensitive resin composition, and can have various structures.
- photosensitive resin composition is excellent in stress relaxation property, adhesiveness, and the like, it can be used as various structural materials in various types of packages developed in recent years.
- 6 and 7 show a cross-sectional structure of an example of such a semiconductor device.
- FIG. 6 is a schematic cross-sectional view showing a wiring structure as one embodiment of a semiconductor device.
- a semiconductor device 600 shown in FIG. 6 includes a silicon chip 23, an interlayer insulating layer 11 provided on one side of the silicon chip 23, and an Al having a pattern including a pad portion 15 formed on the interlayer insulating layer 11.
- the island-shaped core 18 disposed in the vicinity of the opening on the layer 14 contacts the pad portion 15 in the opening of the insulating layer 13 and the surface protective layer 14 and contacts the surface of the core 18 opposite to the surface protective layer 14.
- a rewiring layer 16 extending on the surface protective layer 14.
- the semiconductor device 600 is formed so as to cover the surface protective layer 14, the core 18, and the rewiring layer 16, and a cover coat layer 19 in which an opening is formed in a portion of the rewiring layer 16 on the core 18.
- the conductive ball 17 connected to the rewiring layer 16 with the barrier metal 20 interposed therebetween in the opening of the layer 19, the collar 21 that holds the conductive ball, and the cover coat layer 19 around the conductive ball 17 are provided.
- the underfill 22 is provided.
- the conductive ball 17 is used as an external connection terminal and is formed of solder, gold or the like.
- the underfill 22 is provided to relieve stress when the semiconductor device 600 is mounted.
- FIG. 7 is a schematic cross-sectional view showing a wiring structure as one embodiment of a semiconductor device.
- an Al wiring layer (not shown) and a pad portion 15 of the Al wiring layer are formed on the silicon chip 23, and an insulating layer 13 is formed on the Al wiring layer.
- a surface protective layer 14 is formed.
- a rewiring layer 16 is formed on the pad portion 15, and the rewiring layer 16 extends to an upper portion of the connection portion 24 with the conductive ball 17. Further, a cover coat layer 19 is formed on the surface protective layer 14. The rewiring layer 16 is connected to the conductive ball 17 through the barrier metal 20.
- the above-described photosensitive resin composition forms not only the interlayer insulating layer 11 or the surface protective layer 14 but also the cover coat layer 19, the core 18, the collar 21, the underfill 22, and the like. Can be used as a material for.
- the cured body using the photosensitive resin composition described above is excellent in adhesion to metal layers (for example, Cu, Au, Ni, Ti, etc.) such as the Al wiring layer 12 and the rewiring layer 16, sealing agents, Since the stress relaxation effect is also high, a semiconductor device in which this cured body is used for the surface protective layer 14, the cover coat layer 19, the core 18, the collar 21 such as solder, the underfill 22 used in a flip chip or the like is extremely reliable. It will be excellent.
- the photosensitive resin composition of the present embodiment is particularly suitable for use in the surface protective layer 14 and / or the cover coat layer 19 of the semiconductor device having the rewiring layer 16 in FIGS.
- the thickness of the surface protective layer or the cover coat layer is preferably 3 to 20 ⁇ m, and more preferably 5 to 15 ⁇ m.
- the photosensitive resin composition As described above, by using the above-described photosensitive resin composition, it is possible to suppress the change in pattern shape and dimensions (pattern melt) and to reduce the haze value (cloudiness). Further, in the above heat treatment step that conventionally required 300 ° C. or higher, curing using low-temperature heating of 200 ° C. or lower is possible. In the heat treatment step, the heating temperature is preferably 100 ° C. to 200 ° C., more preferably 150 ° C. to 200 ° C. Furthermore, since the photosensitive resin composition of this embodiment has a small volume shrinkage (curing shrinkage) in the heat treatment step found in photosensitive polyimide or the like, it can prevent a decrease in dimensional accuracy.
- the pattern cured film formed from the photosensitive resin composition of this embodiment has a high glass transition temperature. Accordingly, the surface protective layer and the interlayer insulating layer are excellent in heat resistance. As a result, an electronic component such as a semiconductor device having excellent reliability can be obtained with high yield and high yield. As mentioned above, although preferred embodiment of this invention was described, this invention is not restrict
- A1 and A2 were prepared as the component (A).
- A2 Modified phenol resin synthesized by the method described in Synthesis Example 1 below
- Synthesis Example 1 Synthesis of phenol resin (A2) modified with a compound having an unsaturated hydrocarbon group having 4 to 100 carbon atoms 100 parts by weight of phenol, 43 parts by weight of linseed oil and 0.1 part by weight of trifluoromethanesulfonic acid The mixture was stirred at 120 ° C. for 2 hours to obtain a vegetable oil-modified phenol derivative (a). Next, 130 g of the vegetable oil-modified phenol derivative (a), 16.3 g of paraformaldehyde and 1.0 g of oxalic acid were mixed and stirred at 90 ° C. for 3 hours.
- B1 1,1-Naphthoquinone-2-diazide-5 of 1,1-bis (4-hydroxyphenyl) -1- [4- ⁇ 1- (4-hydroxyphenyl) -1-methylethyl ⁇ phenyl] ethane Sulfonic acid ester (Esterification rate: about 90%, manufactured by AZ Electronic Materials, trade name “TPPA528”)
- C1 to C4 were synthesized by the method of Synthesis Example 2 below.
- Synthesis Example 2 Synthesis of acrylic resins (C1 to C4) 75 g of toluene and 75 g of isopropanol (IPA) were weighed in a 500 ml three-necked flask equipped with a stirrer, a nitrogen introduction tube and a thermometer, and the contents shown in Table 1 were obtained. Polymerizable monomers of butyl acrylate (BA), acrylic acid (AA) and glycidyl methacrylate (GMA), and 0.13 g of azobisisobutyronitrile (AIBN) (0.74 g of C4 only) were added.
- BA butyl acrylate
- AA acrylic acid
- GMA glycidyl methacrylate
- AIBN azobisisobutyronitrile
- GMA glycidyl methacrylate BA: n-butyl acrylate AA: acrylic acid
- D1 Hexakis (methoxymethyl) melamine represented by the following formula D1 (trade name “Nicarak MW-30HM” manufactured by Sanwa Chemical Co., Ltd.)
- E1 was synthesized by the method described in Synthesis Example 3 below.
- Synthesis Example 3 Synthesis of acrylic resin (E1) 75 g of toluene and 75 g of isopropanol (IPA) were weighed in a 500 ml three-necked flask equipped with a stirrer, a nitrogen introduction tube and a thermometer, and butyl acrylate (75 g) separately weighed ( A polymerizable monomer of 85 g (670 mmol) of BA), 24 g (100 mmol) of lauryl acrylate (DDA), 14 g (200 mmol) of acrylic acid (AA), and 0.13 g of azobisisobutyronitrile (AIBN) were added.
- F1 Trimethylsulfonium methyl sulfate represented by the following formula F1 (manufactured by Fluorochem)
- H1 3-glycidoxypropyltrimethoxysilane represented by the following formula H1 (manufactured by Shin-Etsu Silicone, trade name “KBM-403”)
- Examples 1 to 9, Comparative Examples 1 to 4 Components (A) to (I) were blended in the prescribed proportions shown in Table 2. This solution was subjected to pressure filtration using a 3 ⁇ m pore Teflon (registered trademark) filter to obtain photosensitive resin compositions of Examples 1 to 9 and Comparative Examples 1 to 4. In Table 2, unless otherwise specified, the unit is parts by mass.
- ⁇ Evaluation of pattern melt> The patterned resin film obtained by the above-described method was used for 2 hours at a temperature of 175 ° C. (heating time 1.5 hours) in nitrogen using a vertical diffusion furnace (product name “ ⁇ -TF”, manufactured by Koyo Thermo System) It heat-processed (hardened) and obtained the pattern cured film with a film thickness of about 10 micrometers. The results are shown in Table 2.
- the pattern having a minimum diameter of less than 15 ⁇ m that is open without being melted (melted) after the heat-cured pattern is A, B that is 15 ⁇ m or more and less than 30 ⁇ m, B, 30 ⁇ m or more The thing was set to C.
- the pulling speed was 5 mm / min, and the measurement temperature was about room temperature (20 ° C. to 25 ° C.). Measurements were made using five or more test pieces obtained from the cured film obtained under the same conditions, and the average of the measured values was defined as “elongation at break” and “elastic modulus”. The obtained results are shown in Table 2.
- the photosensitive resin composition of the present invention can be used for forming a surface protective layer of a semiconductor element, an interlayer insulating layer and a rewiring layer of a semiconductor package mounted on an electronic device.
- SYMBOLS 1 Semiconductor substrate, 2 ... Protective layer, 3 ... 1st conductor layer, 4 ... Interlayer insulation layer, 5 ... Photosensitive resin layer, 6A, 6B, 6C ... Window part, 7 ... 2nd conductor layer, 8 ... Surface protection 11 ... Interlayer insulating layer 12 ... Wiring layer 13 ... Insulating layer 14 ... Surface protective layer 15 ... Pad portion 16 ... Rewiring layer 17 ... Conductive ball 18 ... Core 19 ... Cover coat layer 20 ... barrier metal, 21 ... collar, 22 ... underfill, 23 ... silicon chip, 24 ... connection part, 100, 200, 300, 400 ... structure, 500, 600, 700 ... semiconductor device.
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Abstract
Description
また本発明は、上記感光性樹脂組成物を用いたパターン硬化膜の製造方法、及び、上記パターン硬化膜を有する電子部品を提供することを目的とする。
[1](A)フェノール性水酸基を有するアルカリ可溶性樹脂と、(B)光により酸を生成する化合物と、(C)(A)成分と架橋する基を有するアクリル樹脂と、を含有する感光性樹脂組成物。
[2]前記(C)成分が下記一般式(1)で表される構造単位を含むアクリル樹脂である、前記感光性樹脂組成物。
[3]前記(C)成分がさらに下記一般式(2)で表される構造単位を含むアクリル樹脂である、前記感光性樹脂組成物。
[4]前記(C)成分がさらに下記式(3)又は(4)で表される構造単位を含むアクリル樹脂である、前記感光性樹脂組成物。
[6]前記(A)成分がフェノール樹脂である、前記感光性樹脂組成物。
[7]前記(B)成分がo-キノンジアジド化合物である、前記感光性樹脂組成物。
[8](E)(A)成分と架橋する基を含まないアクリル樹脂をさらに含有する、前記感光性樹脂組成物。
[9](F)熱酸発生剤をさらに含有する、前記感光性樹脂組成物。
[10]前記感光性樹脂組成物を基板上に塗布し、塗布された感光性樹脂組成物を乾燥して樹脂膜を形成する工程と、前記樹脂膜を露光する工程と、露光後の前記樹脂膜をアルカリ水溶液によって現像して、パターン樹脂膜を形成する工程と、前記パターン樹脂膜を加熱する工程と、を有する、パターン硬化膜の製造方法。
[11]前記パターン樹脂膜を加熱する工程における加熱温度が250℃以下である、前記パターン硬化膜の製造方法。
[12]前記パターン硬化膜の製造方法により製造されるパターン硬化膜を層間絶縁層又は表面保護層として有する電子部品。
[13]前記パターン硬化膜の製造方法により製造されるパターン硬化膜をカバーコート層、コア、カラー又はアンダーフィルとして有する電子部品。
本実施形態にかかる感光性樹脂組成物は、(A)フェノール性水酸基を有するアルカリ可溶性樹脂と、(B)光により酸を生成する化合物と、(C)(A)成分と架橋する基(反応性基)を有するアクリル樹脂と、を含有する。以下、各成分について説明する。
(A)成分は、分子中にフェノール性水酸基を有し、アルカリ現像液に対して可溶な樹脂である。
ここで、(A)成分がアルカリ水溶液に可溶であることの1つの基準を以下に説明する。(A)成分単独と任意の溶剤、又は(A)成分と、以下に順を追って説明する(B)成分、(C)成分及び(D)成分と任意の溶剤とから得られた樹脂組成物を、シリコンウエハ等の基板上に回転塗布し、膜厚5μm程度の樹脂膜を形成する。これをテトラメチルアンモニウムヒドロキシド水溶液、金属水酸化物水溶液、有機アミン水溶液のいずれか一つに、20~25℃において浸漬する。この結果、均一な溶液として溶解し得るとき、用いた(A)成分はアルカリ水溶液に可溶であると判断する。
(B)成分である光により酸を生成する化合物は、感光剤として用いられる。(B)成分は、光照射により酸を生成させ、光照射した部分のアルカリ水溶液への可溶性を増大させる機能を有する。(B)成分としては、一般に光酸発生剤と称される化合物を用いることができる。(B)成分としては、例えば、o-キノンジアジド化合物、アリールジアゾニウム塩、ジアリールヨードニウム塩、トリアリールスルホニウム塩等が挙げられる。これらの中で、感度が高いことから、o-キノンジアジド化合物が好ましい。
(C)成分である(A)成分と架橋する基(反応性基)を有するアクリル樹脂は、(A)成分との相溶性に優れるため、良好な現像性が得られるとともに、樹脂膜の硬化時に(C)成分の反応性基が(A)成分のフェノール性水酸基と架橋し、パターンメルトを抑制する効果が得られる。(C)成分の反応性基は分子中に存在することが好ましい。反応性基を含むアクリル樹脂としては、例えば、下記一般式(1)で表される構造単位を含むアクリル樹脂であることが好ましい。
また、R4で示される炭素数4~20のアルキル基としては、例えば、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基、トリデシル基、テトラデシル基、ペンタデシル基、ヘキサデシル基、ヘプタデシル基、オクタデシル基、ノナデシル基、エイコシル基及びこれらの構造異性体が挙げられる。
(C)成分の反応性基(エポキシ基等)と付加反応を生じることなく、(A)成分と(C)成分の反応性基との反応を促進することができ、パターン硬化膜の機械特性を向上できる観点から、一般式(5)で表される構造単位は3級アミノ基を有することが好ましい。
また、(C)成分の反応性基は公知の方法を用いることで確認することができる。例えば、13C NMR、1H NMR、ガスクロマトグラフィー等を用いることで確認することができる。
本実施形態にかかる感光性樹脂組成物はさらに(D)成分として熱架橋剤を含有してもよい。熱架橋剤はパターン形成後の感光性樹脂膜を加熱して硬化する際に、(A)成分と反応して橋架け構造を形成しうる構造を有する化合物である。これにより、膜の脆さ及び膜の溶融を防ぐことができる。熱架橋剤としては、フェノール性水酸基を有する化合物、ヒドロキシメチルアミノ基を有する化合物又はエポキシ基を有する化合物を用いることが好ましい。
上記ヒドロキシメチルアミノ基の全部をアルキルエーテル化したアルコキシメチルアミノ基を有する化合物の中でも特に、下記一般式(9)で表される化合物が好ましい。
本実施形態にかかる感光性樹脂組成物は(E)成分として(A)成分と架橋する基を含まない(好ましくはエポキシ基を含まない)アクリル樹脂をさらに含有していてもよい。アクリル樹脂としては、下記一般式(10)又は(11)で表される構造単位を有するアクリル樹脂であることが好ましい。感光性樹脂組成物が一般式(10)又は(11)で表される構造単位を有するアクリル樹脂を含有することにより、良好な感光特性を維持しつつ、耐熱衝撃性を向上することができる。(E)成分は、上記アクリル樹脂の1種のみからなるものであってもよく、2種以上を含むものであってもよい。
CH2=C(R30)-COOR31 (12)
ここで、上記一般式(12)中、R30は水素原子又はメチル基を示し、R31は炭素数4~20のアルキル基を示す。また、R31で示される炭素数4~20のアルキル基としては、例えば、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基、トリデシル基、テトラデシル基、ペンタデシル基、ヘキサデシル基、ヘプタデシル基、オクタデシル基、ノナデシル基、エイコシル基及びこれらの構造異性体が挙げられる。上記一般式(12)で表される重合性単量体としては、例えば、(メタ)アクリル酸ブチル、(メタ)アクリル酸ペンチル、(メタ)アクリル酸ヘキシル、(メタ)アクリル酸ヘプチル、(メタ)アクリル酸オクチル、(メタ)アクリル酸ノニル、(メタ)アクリル酸デシル、(メタ)アクリル酸ウンデシル、(メタ)アクリル酸ドデシル、(メタ)アクリル酸トリデシル、(メタ)アクリル酸テトラデシル、(メタ)アクリル酸ペンタデシル、(メタ)アクリル酸ヘキサデシル、(メタ)アクリル酸ヘプタデシル、(メタ)アクリル酸オクタデシル、(メタ)アクリル酸ノナデシル、(メタ)アクリル酸エイコシル等が挙げられる。これらの重合性単量体は1種を単独で又は2種以上を組み合わせて用いられる。
本実施形態にかかる感光性樹脂組成物は必要に応じ、熱酸発生剤、エラストマー、溶媒、溶解促進剤、溶解阻害剤、界面活性剤又はレベリング剤、接着助剤等のその他の成分を含有することができる。
本実施形態にかかる感光性樹脂組成物は(F)成分として熱酸発生剤を含有していてもよい。(F)成分は熱により酸を生成する化合物であり、パターンメルトをより抑制することができる。これは、現像後の感光性樹脂膜を加熱する際に酸を発生させることが可能となり、(A)成分と(C)成分との反応、すなわち熱架橋反応がより低温から開始するためであると考えられる。また、(F)成分は光照射によっても酸を発生することができるものが多く、このようなものを用いると露光部のアルカリ水溶液への溶解性を増大することもできる。よって、未露光部と露光部とのアルカリ水溶液に対する溶解性の差がさらに大きくなり解像度が向上する。ただし、本実施形態においては上記(B)成分とは異なる化合物を(F)成分として用いる。
上記アリール基としては、フェニル基又は置換基を有するフェニル基が好ましい。
本実施形態にかかる感光性樹脂組成物は、(G)成分としてエラストマーを含有していてもよい。これにより、得られるレジストパターンは柔軟性の点でさらに優れるものとなり、レジストパターンの機械特性及び耐熱衝撃性をより一層向上させることができる。エラストマーとしては、従来公知のものを用いることができるが、エラストマーを構成する重合体のガラス転移温度(Tg)が20℃以下であることが好ましい。
本実施形態にかかる感光性樹脂組成物は、基板との密着性を向上させる観点から、(H)成分としてシラン化合物を含有していてもよい。そのようなシラン化合物としては、例えば、ウレイドプロピルトリエトキシシラン、ビニルトリエトキシシラン、γ-グリシドキシプロピルトリエトキシシラン、γ-メタクリロキシプロピルトリメトキシシラン、尿素プロピルトリエトキシシラン、メチルフェニルシランジオール、エチルフェニルシランジオール、n-プロピルフェニルシランジオール、イソプロピルフェニルシランジオール、n-ブチルシフェニルシランジオール、イソブチルフェニルシランジオール、tert-ブチルフェニルシランジオール、ジフェニルシランジオール、エチルメチルフェニルシラノール、n-プロピルメチルフェニルシラノール、イソプロピルメチルフェニルシラノール、n-ブチルメチルフェニルシラノール、イソブチルメチルフェニルシラノール、tert-ブチルメチルフェニルシラノール、エチルn-プロピルフェニルシラノール、エチルイソプロピルフェニルシラノール、n-ブチルエチルフェニルシラノール、イソブチルエチルフェニルシラノール、tert-ブチルエチルフェニルシラノール、メチルジフェニルシラノール、エチルジフェニルシラノール、n-プロピルジフェニルシラノール、イソプロピルジフェニルシラノール、n-ブチルジフェニルシラノール、イソブチルジフェニルシラノール、tert-ブチルジフェニルシラノール、フェニルシラントリオール、1,4-ビス(トリヒドロキシシリル)ベンゼン、1,4-ビス(メチルジヒドロキシシリル)ベンゼン、1,4-ビス(エチルジヒドロキシシリル)ベンゼン、1,4-ビス(プロピルジヒドロキシシリル)ベンゼン、1,4-ビス(ブチルジヒドロキシシリル)ベンゼン、1,4-ビス(ジメチルヒドロキシシリル)ベンゼン、1,4-ビス(ジエチルヒドロキシシリル)ベンゼン、1,4-ビス(ジプロピルドロキシシリル)ベンゼン、1,4-ビス(ジブチルヒドロキシシリル)ベンゼン、3-グリシドキシプロピルトリメトキシシラン、3-グリシドキシプロピルトリエトキシシラン等が挙げられる。これらのシラン化合物は1種を単独で又は2種以上を組み合わせて用いられる。このうち、(A)成分及び(C)成分と反応し、接着性及び硬化物の破断伸びが向上する点で、ウレイドプロピルトリエトキシシラン、ビニルトリエトキシシラン、γ-グリシドキシプロピルトリエトキシシラン、γ-メタクリロキシプロピルトリメトキシシラン、尿素プロピルトリエトキシシラン、3-グリシドキシプロピルトリメトキシシラン又は3-グリシドキシプロピルトリエトキシシランが好ましい。
本実施形態にかかる感光性樹脂組成物は、基板上への塗布性の観点及び均一な厚さの樹脂膜を形成できるという観点から、(I)成分として溶媒を含有していてもよい。溶媒としては、例えば、γ-ブチロラクトン、乳酸エチル、プロピレングリコールモノメチルエーテルアセテート、酢酸ベンジル、n-ブチルアセテート、エトキシエチルプロピオナート、3-メチルメトキシプロピオナート、N-メチル-2-ピロリドン、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、ジメチルスルホキシド、ヘキサメチルホスホリルアミド、テトラメチレンスルホン、ジエチルケトン、ジイソブチルケトン、メチルアミルケトン、シクロヘキサノン、プロピレングリコールモノメチルエーテル、プロピレングリコールモノプロピルエーテル、プロピレングリコールモノブチルエーテル、ジプロピレングリコールモノメチルエーテル等が挙げられる。これらの溶媒は1種を単独で又は2種以上を組み合わせて用いられる。
(I)成分を含有させる場合の含有量は、特に限定されないが、感光性樹脂組成物中の溶媒の割合が20~90質量%となるように調整されることが好ましい。
本実施形態にかかる感光性樹脂組成物は、(J)成分として溶解促進剤を含有していてもよい。(J)溶解促進剤を含有することで、パターン樹脂膜をアルカリ水溶液で現像する際の露光部の溶解速度を増加させ、感度及び解像性を向上させることができる。溶解促進剤としては従来公知のものを用いることができる。その具体例としては、カルボキシ基、スルホン酸、スルホンアミド基を有する化合物等が挙げられる。
このような溶解促進剤を含有させる場合の含有量は、パターン樹脂膜のアルカリ水溶液に対する溶解速度によって決めることができるが、例えば、(A)成分の100質量部に対して、0.01~30質量部とすることが好ましい。
本実施形態にかかる感光性樹脂組成物は、(K)成分として溶解阻害剤を含有していてもよい。(K)溶解阻害剤は(A)成分のアルカリ水溶液に対する溶解性を阻害する化合物であり、残膜厚、現像時間及びコントラスト等をコントロールするために用いられる。その具体例としては、ジフェニルヨードニウムニトラート、ビス(p-tert-ブチルフェニル)ヨードニウムニトラート、ジフェニルヨードニウムブロミド、ジフェニルヨードニウムクロリド、ジフェニルヨードニウムヨージド等が挙げられる。溶解阻害剤を含有する場合の含有量は、感度と現像時間の許容幅の点から、(A)成分の合計量100質量部に対して0.01~20質量部が好ましく、0.01~15質量部がより好ましく、0.05~10質量部がさらに好ましい。
本実施形態にかかる感光性樹脂組成物は、(L)成分として界面活性剤又はレベリング剤を含有していてもよい。感光性樹脂組成物が(L)成分を含有することによって、塗布性、例えばストリエーション(膜厚のムラ)を防いだり、現像性を向上させたりすることができる。このような界面活性剤又はレベリング剤としては、例えば、ポリオキシエチレンウラリルエーテル、ポリオキシエチレンステアリルエーテル、ポリオキシエチレンオレイルエーテル、ポリオキシエチレンオクチルフェノールエーテル等が挙げられる。市販品としては、メガファックスF171、F173、R-08(大日本インキ化学工業株式会社製、商品名)、フロラードFC430、FC431(住友スリーエム株式会社、商品名)、オルガノシロキサンポリマーKP341、KBM303、KBM803(信越化学工業株式会社製、商品名)がある。
(L)成分を含有する場合、その含有量は、(A)成分100質量部に対して、0.001~5質量部が好ましく、0.01~3質量部がより好ましい。
本実施形態にかかるパターン硬化膜の製造方法は、通常、上述の感光性樹脂組成物を支持基板上に塗布及び乾燥して感光性樹脂膜を形成する工程(成膜工程)と、感光性樹脂膜を露光する工程(露光工程)と、露光後の感光性樹脂膜をアルカリ水溶液によって用いて現像して、パターン樹脂膜を形成する工程(現像工程)と、パターン樹脂膜を加熱する工程(加熱工程)とを有する。
成膜工程では、ガラス基板、半導体、金属酸化物絶縁体(例えばTiO2、SiO2等)、窒化ケイ素などの支持基板上に、上述した感光性樹脂組成物を、スピンナー等を用いて回転塗布する。塗布された感光性樹脂組成物をホットプレート、オーブン等を用いた加熱により乾燥する。これにより、基板上に感光性樹脂組成物の被膜(感光性樹脂膜)が形成される。
露光工程では、基板上に形成された感光性樹脂膜に対して、マスクを介して紫外線、可視光線、放射線等の活性光線を照射する。(A)成分はi線に対する透明性が高いので、i線の照射を好適に用いることができる。なお、露光後、必要に応じて露光後加熱(PEB)を行うこともできる。露光後加熱の温度は70℃~140℃、露光後加熱の時間は1分~5分が好ましい。
現像工程では、露光工程後の感光性樹脂膜の露光部を現像液で除去することにより、感光性樹脂膜がパターン化される。現像液としては、例えば、水酸化ナトリウム、水酸化カリウム、ケイ酸ナトリウム、アンモニア、エチルアミン、ジエチルアミン、トリエチルアミン、トリエタノールアミン、水酸化テトラメチルアンモニウム(TMAH)等のアルカリ水溶液が好適に用いられる。これらの水溶液の塩基濃度は、0.1~10質量%とすることが好ましい。さらに、上記現像液にアルコール類又は界面活性剤を添加して使用することもできる。これらはそれぞれ、現像液100質量部に対して、好ましくは0.01~10質量部、より好ましくは0.1~5質量部の範囲で配合することができる。パターン化された感光性樹脂膜をパターン樹脂膜という。
加熱処理工程では、パターン樹脂膜を加熱することにより、感光性樹脂組成物を硬化する。パターン樹脂膜を硬化して得られた膜を、パターン硬化膜という。加熱温度は、電子デバイスに対する熱によるダメージを十分に防止する点から、好ましくは250℃以下、より好ましくは225℃以下であり、さらに好ましくは140~200℃である。加熱処理は、例えば、石英チューブ炉、ホットプレート、ラピッドサーマルアニール、縦型拡散炉、赤外線硬化炉、電子線硬化炉、マイクロ波硬化炉等のオーブンを用いて行うことができる。また、大気中、窒素等の不活性雰囲気中で行うことができるが、窒素雰囲気下で行う方がパターンの酸化を防ぐことができるので望ましい。上述の望ましい加熱温度の範囲は従来の加熱温度よりも低いため、支持基板及び電子デバイスへのダメージを小さく抑えることができる。したがって、本実施形態のレジストパターンの製造方法を用いることによって、電子デバイスを歩留まり良く製造することができる。また、プロセスの省エネルギー化につながる。さらに、本実施形態の感光性樹脂組成物によれば、感光性ポリイミド樹脂等に見られる加熱処理工程における体積収縮(硬化収縮)が小さいため、寸法精度の低下を防ぐことができる。
次に、本実施形態にかかるパターン硬化膜の製造方法の一例として、半導体装置の製造工程を図面に基づいて説明する。図1~5は、多層配線構造を有する半導体装置の製造工程の一実施形態を示す概略断面図である。
次に、本実施形態にかかる電子部品について説明する。本実施形態の電子部品は、上述の製造方法によって形成されるパターン硬化膜を層間絶縁層又は表面保護層として有する。上記パターン硬化膜は、例えば、半導体装置の表面保護層及び層間絶縁層、多層配線板の層間絶縁層等として使用することができる。本実施形態の電子部品は、上述の感光性樹脂組成物を用いて形成される表面保護層又は層間絶縁層を有すること以外は特に制限されず、様々な構造をとることができる。
また、従来は300℃以上を必要としていた上記の加熱処理工程において、200℃以下の低温加熱を用いた硬化が可能である。上記加熱処理工程において、加熱温度は、100℃~200℃が好ましく、150℃~200℃がより好ましい。さらに、本実施形態の感光性樹脂組成物は、感光性ポリイミド等に見られた加熱処理工程における体積収縮(硬化収縮)が小さいため、寸法精度の低下を防ぐことができる。本実施形態の感光性樹脂組成物から形成されたパターン硬化膜は、高いガラス転移温度を有する。したがって、耐熱性に優れた表面保護層及び層間絶縁層となる。この結果、信頼性に優れた半導体装置等の電子部品を歩留まり良く高収率で得ることができる。
以上、本発明の好適な実施形態について説明したが、本発明はこれらに制限されるものではない。
まず、(A)成分として下記A1及びA2を準備した。
A1:クレゾールノボラック樹脂(クレゾール/ホルムアルデヒドノボラック樹脂、m-クレゾール/p-クレゾール(モル比)=60/40、ポリスチレン換算重量平均分子量=13,000、旭有機材工業株式会社製、商品名「EP4020G」)を準備した。
A2:下記合成例1に記載の方法で合成した変性フェノール樹脂
フェノール100質量部、亜麻仁油43質量部及びトリフルオロメタンスルホン酸0.1質量部を混合し、120℃で2時間撹拌し、植物油変性フェノール誘導体(a)を得た。次いで、植物油変性フェノール誘導体(a)130g、パラホルムアルデヒド16.3g及びシュウ酸1.0gを混合し、90℃で3時間撹拌した。次いで、120℃に昇温して減圧下で3時間撹拌した後、反応液に無水コハク酸29g及びトリエチルアミン0.3gを加え、大気圧下、100℃で1時間撹拌した。反応液を室温まで冷却し、反応生成物である炭素数4~100の不飽和炭化水素基を有する化合物で変性されたフェノール樹脂A2を得た(酸価120mgKOH/g)。このA2のGPC法の標準ポリスチレン換算により求めた重量平均分子量は約25,000であった。
なお、GPC法による重量平均分子量の測定条件は以下のとおりである。
測定装置:検出器 株式会社日立製作所製L4000 UV
ポンプ:株式会社日立製作所製L6000
株式会社島津製作所製C-R4A Chromatopac
測定条件:カラム Gelpack GL-S300MDT-5 x2本
溶離液:THF/DMF=1/1 (容積比)
LiBr(0.03mol/l)、H3PO4(0.06mol/l)
流速:1.0ml/min、検出器:UV270nm
測定する試料0.5mgに対して溶媒[THF/DMF=1/1(容積比)]1mlの溶液を用いて測定した。
B1:1,1-ビス(4-ヒドロキシフェニル)-1-[4-{1-(4-ヒドロキシフェニル)-1-メチルエチル}フェニル]エタンの1,2-ナフトキノン-2-ジアジド-5-スルホン酸エステル(エステル化率約90%、AZエレクトロニックマテリアルズ社製、商品名「TPPA528」)
合成例2:アクリル樹脂(C1~C4)の合成
攪拌機、窒素導入管及び温度計を備えた500mlの三口フラスコに、トルエン75g、イソプロパノール(IPA)75gを秤取し、表1に示す含有量で、アクリル酸ブチル(BA)、アクリル酸(AA)及びグリシジルメタクリレート(GMA)の重合性単量体、並びにアゾビスイソブチロニトリル(AIBN)0.13g(C4のみ0.70g)を加えた。室温にて約270min-1の攪拌回転数で攪拌しながら、窒素ガスを400ml/分の流量で30分間流し、溶存酸素を除去した。その後、窒素ガスの流入を停止し、フラスコを密閉し、恒温水槽にて約25分で65℃まで昇温した。同温度を14時間保持して重合反応を行い、アクリル樹脂C1~C4を得た。この際の重合率は98%であった。また、このC1~C4のGPC法の標準ポリスチレン換算により求めた重量平均分子量(Mw)を表1に示す。
合成例3:アクリル樹脂(E1)の合成
攪拌機、窒素導入管及び温度計を備えた500mlの三口フラスコに、トルエン75g、イソプロパノール(IPA)75gを秤取し、別途に秤取したアクリル酸ブチル(BA)85g(670mmol)、ラウリルアクリレート(DDA)24g(100mmol)、アクリル酸(AA)14g(200mmol)の重合性単量体、並びにアゾビスイソブチロニトリル(AIBN)0.13gを加えた。室温にて約270rpmの攪拌回転数で攪拌しながら、窒素ガスを400ml/分の流量で30分間流し、溶存酸素を除去した。その後、窒素ガスの流入を停止し、フラスコを密閉し、恒温水槽にて約25分で65℃まで昇温した。同温度を14時間保持して重合反応を行い、アクリル樹脂E1を得た。この際の重合率は98%であった。また、このE1のGPC法の標準ポリスチレン換算により求めた重量平均分子量(Mw)は36,000であった。
I1:乳酸エチル
(A)~(I)成分を表2に表示した所定の割合で配合した。この溶液を3μm孔のテフロン(登録商標)フィルターを用いて加圧ろ過して、実施例1~9及び比較例1~4の感光性樹脂組成物を得た。表2において、特に記載がない場合、単位は質量部である。
実施例1~9及び比較例1~4で得られた感光性樹脂組成物をシリコン基板上にスピンコートして、120℃で3分間加熱し、膜厚約12~14μmの塗膜を形成した。次いで、i線ステッパー(キヤノン株式会社製、商品名「FPA-3000i」)を用いて、テストパターンが描画されたマスクを介してi線(365nm)での縮小投影露光を行った。露光後、水酸化テトラメチルアンモニウム(TMAH)の2.38%水溶液にて現像を行い、残膜厚が初期膜厚の80~95%程度となるように現像を行った。その後、水でリンスし、パターン樹脂膜を得た。パターン形成に必要な最小露光量を感度として評価した。
また、現像後の残渣(現像性)の評価については、走査型電子顕微鏡(SEM)を用いて開口部の残渣の有無を観察した。開口部の端面から0.5μm未満の範囲に残渣がある場合(又は残渣がない場合)をA、0.5~1μmの範囲に残渣がある場合をB、1μmより大きい範囲に残渣がある場合をCとした。
以上の感光特性の評価結果を表2に示す。
上述の方法で得たパターン樹脂膜を縦型拡散炉(光洋サーモシステム製、商品名「μ-TF」)を用い、窒素中、温度175℃(昇温時間1.5時間)で2時間、加熱処理(硬化)し、膜厚約10μmのパターン硬化膜を得た。その結果を表2に示す。
また、パターンメルトの評価については、加熱硬化後のパターンがメルト(溶融)してつぶれることなく開口している最小径が15μm未満のものをA、15μm以上30μm未満のものをB、30μm以上のものをCとした。
実施例1~9及び比較例1~4で得られた感光性樹脂組成物をシリコン基板上にスピンコートして、120℃で3分間加熱し、膜厚約12~14μmの塗膜を形成した。上記の塗膜をプロキシミティ露光機(キヤノン株式会社製、商品名「PLA-600FA」)を用いて、マスクを介して全波長で露光を行った。露光後、TMAHの2.38%水溶液を用いて現像を行い、10mm幅の矩形パターンを得た。その後、矩形パターンを縦型拡散炉(光洋サーモシステム株式会社製、商品名「μ-TF」)を用い、窒素中、温度175℃(昇温時間1.5時間)で2時間、塗膜を加熱処理(硬化)し、膜厚約10μmの硬化膜を得た。上記の方法で得た膜厚約10μmの硬化膜をシリコン基板から剥離し、剥離した膜の破断伸び(EL)及び弾性率(YM)を株式会社島津製作所製「オートグラフAGS-H100N」によって測定した。試料の幅は10mm、膜厚は9~11μmであり、チャック間は20mmとした。引っ張り速度は5mm/分で、測定温度は室温(20℃~25℃)程度とした。同一条件で得た硬化膜から得た5本以上の試験片を用いて測定し、測定値の平均を「破断伸び」及び「弾性率」とした。得られた結果を表2に示す。
実施例1~9及び比較例1~4で得られた感光性樹脂組成物をガラス板にスピンコートして、120℃で3分間加熱し、膜厚約10~12μmの塗膜を形成した。その後、TMAHの2.38%水溶液に浸した後、水洗して測定サンプルを得た。白濁度(ヘーズ値)はヘーズメーター(日本電色工業株式会社製、商品名「NDH5000」、光源は白色LEDを使用)を用いて測定した。
なお、ヘーズ値は低いほど曇度(白濁度)が低いことを示し、3以下であることが好ましい。
Claims (13)
- (A)フェノール性水酸基を有するアルカリ可溶性樹脂と、
(B)光により酸を生成する化合物と、
(C)(A)成分と架橋する基を有するアクリル樹脂と、
を含有する感光性樹脂組成物。 - 前記(A)成分100質量部に対し、前記(C)成分を1~50質量部含有する、請求項1~4のいずれか一項に記載の感光性樹脂組成物。
- 前記(A)成分がフェノール樹脂である、請求項1~5のいずれか一項に記載の感光性樹脂組成物。
- 前記(B)成分がo-キノンジアジド化合物である、請求項1~6のいずれか一項に記載の感光性樹脂組成物。
- (E)(A)成分と架橋する基を含まないアクリル樹脂をさらに含有する、請求項1~7のいずれか一項に記載の感光性樹脂組成物。
- (F)熱酸発生剤をさらに含有する、請求項1~8のいずれか一項に記載の感光性樹脂組成物。
- 請求項1~9のいずれか一項に記載の感光性樹脂組成物を基板上に塗布し、塗布された感光性樹脂組成物を乾燥して樹脂膜を形成する工程と、前記樹脂膜を露光する工程と、露光後の前記樹脂膜をアルカリ水溶液によって現像して、パターン樹脂膜を形成する工程と、前記パターン樹脂膜を加熱する工程と、を有する、パターン硬化膜の製造方法。
- 前記パターン樹脂膜を加熱する工程における加熱温度が250℃以下である、請求項10に記載のパターン硬化膜の製造方法。
- 請求項10又は11に記載のパターン硬化膜の製造方法により製造されるパターン硬化膜を層間絶縁層又は表面保護層として有する電子部品。
- 請求項10又は11に記載のパターン硬化膜の製造方法により製造されるパターン硬化膜をカバーコート層、コア、カラー又はアンダーフィルとして有する電子部品。
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