JP2016091016A - パターン形成方法 - Google Patents
パターン形成方法 Download PDFInfo
- Publication number
- JP2016091016A JP2016091016A JP2015204501A JP2015204501A JP2016091016A JP 2016091016 A JP2016091016 A JP 2016091016A JP 2015204501 A JP2015204501 A JP 2015204501A JP 2015204501 A JP2015204501 A JP 2015204501A JP 2016091016 A JP2016091016 A JP 2016091016A
- Authority
- JP
- Japan
- Prior art keywords
- alkyl
- photoresist
- optionally substituted
- polymer
- composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 77
- 229920000642 polymer Polymers 0.000 claims abstract description 152
- 239000000203 mixture Substances 0.000 claims abstract description 151
- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 114
- 239000011159 matrix material Substances 0.000 claims abstract description 73
- 239000000654 additive Substances 0.000 claims abstract description 61
- 230000000996 additive effect Effects 0.000 claims abstract description 58
- 239000003960 organic solvent Substances 0.000 claims abstract description 29
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 239000007787 solid Substances 0.000 claims abstract description 19
- 230000005855 radiation Effects 0.000 claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 14
- 238000000671 immersion lithography Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000000178 monomer Substances 0.000 claims description 42
- -1 C10 alkyl hydrogen Chemical compound 0.000 claims description 36
- 229910052739 hydrogen Inorganic materials 0.000 claims description 25
- 239000001257 hydrogen Substances 0.000 claims description 25
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 22
- 239000002253 acid Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 15
- 125000000217 alkyl group Chemical group 0.000 claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 125000000008 (C1-C10) alkyl group Chemical group 0.000 claims description 6
- 125000006273 (C1-C3) alkyl group Chemical group 0.000 claims description 5
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims description 5
- 125000006732 (C1-C15) alkyl group Chemical group 0.000 claims description 4
- AQYSYJUIMQTRMV-UHFFFAOYSA-N hypofluorous acid Chemical compound FO AQYSYJUIMQTRMV-UHFFFAOYSA-N 0.000 claims description 4
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 claims description 2
- 125000001153 fluoro group Chemical group F* 0.000 claims description 2
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 2
- 238000007654 immersion Methods 0.000 abstract description 19
- 238000011161 development Methods 0.000 abstract description 18
- 239000007788 liquid Substances 0.000 abstract description 14
- 238000002386 leaching Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 120
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 42
- 239000000243 solution Substances 0.000 description 32
- 239000000463 material Substances 0.000 description 31
- 239000002904 solvent Substances 0.000 description 27
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 23
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 22
- 229910052757 nitrogen Inorganic materials 0.000 description 21
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 16
- 238000006116 polymerization reaction Methods 0.000 description 16
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 238000001459 lithography Methods 0.000 description 11
- 229910052710 silicon Inorganic materials 0.000 description 11
- 239000010703 silicon Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000005587 bubbling Effects 0.000 description 10
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 9
- RXGUIWHIADMCFC-UHFFFAOYSA-N 2-Methylpropyl 2-methylpropionate Chemical compound CC(C)COC(=O)C(C)C RXGUIWHIADMCFC-UHFFFAOYSA-N 0.000 description 8
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 8
- BTMVHUNTONAYDX-UHFFFAOYSA-N butyl propionate Chemical compound CCCCOC(=O)CC BTMVHUNTONAYDX-UHFFFAOYSA-N 0.000 description 8
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 8
- 150000002576 ketones Chemical class 0.000 description 8
- 238000003786 synthesis reaction Methods 0.000 description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
- 230000003667 anti-reflective effect Effects 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 229940116333 ethyl lactate Drugs 0.000 description 7
- 229910052731 fluorine Inorganic materials 0.000 description 7
- 239000011737 fluorine Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 238000004528 spin coating Methods 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- FFWSICBKRCICMR-UHFFFAOYSA-N 5-methyl-2-hexanone Chemical compound CC(C)CCC(C)=O FFWSICBKRCICMR-UHFFFAOYSA-N 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 239000006117 anti-reflective coating Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- 238000000206 photolithography Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 6
- PTTPXKJBFFKCEK-UHFFFAOYSA-N 2-Methyl-4-heptanone Chemical compound CC(C)CC(=O)CC(C)C PTTPXKJBFFKCEK-UHFFFAOYSA-N 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 5
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 5
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 5
- 238000005530 etching Methods 0.000 description 5
- 229920001519 homopolymer Polymers 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 125000003161 (C1-C6) alkylene group Chemical group 0.000 description 4
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 4
- XLLIQLLCWZCATF-UHFFFAOYSA-N 2-methoxyethyl acetate Chemical compound COCCOC(C)=O XLLIQLLCWZCATF-UHFFFAOYSA-N 0.000 description 4
- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 4
- 101100434207 Arabidopsis thaliana ACT8 gene Proteins 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 4
- 125000001931 aliphatic group Chemical group 0.000 description 4
- XUPYJHCZDLZNFP-UHFFFAOYSA-N butyl butanoate Chemical compound CCCCOC(=O)CCC XUPYJHCZDLZNFP-UHFFFAOYSA-N 0.000 description 4
- 238000010511 deprotection reaction Methods 0.000 description 4
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 4
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 4
- RGFNRWTWDWVHDD-UHFFFAOYSA-N isobutyl butyrate Chemical compound CCCC(=O)OCC(C)C RGFNRWTWDWVHDD-UHFFFAOYSA-N 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 4
- 238000000059 patterning Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 4
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 3
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 3
- 239000004971 Cross linker Substances 0.000 description 3
- 229920003270 Cymel® Polymers 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical class CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 3
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 3
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 3
- 125000003158 alcohol group Chemical group 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- PGMYKACGEOXYJE-UHFFFAOYSA-N anhydrous amyl acetate Natural products CCCCCOC(C)=O PGMYKACGEOXYJE-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical class CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000994 contrast dye Substances 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 239000012776 electronic material Substances 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- 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 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- QQZOPKMRPOGIEB-UHFFFAOYSA-N n-butyl methyl ketone Natural products CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- PWQLFIKTGRINFF-UHFFFAOYSA-N tert-butyl 4-hydroxypiperidine-1-carboxylate Chemical compound CC(C)(C)OC(=O)N1CCC(O)CC1 PWQLFIKTGRINFF-UHFFFAOYSA-N 0.000 description 3
- WLOQLWBIJZDHET-UHFFFAOYSA-N triphenylsulfonium Chemical compound C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 WLOQLWBIJZDHET-UHFFFAOYSA-N 0.000 description 3
- 239000012953 triphenylsulfonium Substances 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- OOIBFPKQHULHSQ-UHFFFAOYSA-N (3-hydroxy-1-adamantyl) 2-methylprop-2-enoate Chemical compound C1C(C2)CC3CC2(O)CC1(OC(=O)C(=C)C)C3 OOIBFPKQHULHSQ-UHFFFAOYSA-N 0.000 description 2
- 125000006528 (C2-C6) alkyl group Chemical group 0.000 description 2
- GEWWCWZGHNIUBW-UHFFFAOYSA-N 1-(4-nitrophenyl)propan-2-one Chemical compound CC(=O)CC1=CC=C([N+]([O-])=O)C=C1 GEWWCWZGHNIUBW-UHFFFAOYSA-N 0.000 description 2
- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 description 2
- TUIWMHDSXJWXOH-UHFFFAOYSA-N 2,5-dimethylhexan-3-one Chemical compound CC(C)CC(=O)C(C)C TUIWMHDSXJWXOH-UHFFFAOYSA-N 0.000 description 2
- IWSZDQRGNFLMJS-UHFFFAOYSA-N 2-(dibutylamino)ethanol Chemical compound CCCCN(CCO)CCCC IWSZDQRGNFLMJS-UHFFFAOYSA-N 0.000 description 2
- JVSWJIKNEAIKJW-UHFFFAOYSA-N 2-Methylheptane Chemical compound CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 2
- BYACHAOCSIPLCM-UHFFFAOYSA-N 2-[2-[bis(2-hydroxyethyl)amino]ethyl-(2-hydroxyethyl)amino]ethanol Chemical compound OCCN(CCO)CCN(CCO)CCO BYACHAOCSIPLCM-UHFFFAOYSA-N 0.000 description 2
- DJYQGDNOPVHONN-UHFFFAOYSA-N 2-[bis(2-acetyloxyethyl)amino]ethyl acetate Chemical compound CC(=O)OCCN(CCOC(C)=O)CCOC(C)=O DJYQGDNOPVHONN-UHFFFAOYSA-N 0.000 description 2
- XHJGXOOOMKCJPP-UHFFFAOYSA-N 2-[tert-butyl(2-hydroxyethyl)amino]ethanol Chemical compound OCCN(C(C)(C)C)CCO XHJGXOOOMKCJPP-UHFFFAOYSA-N 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical class CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 2
- CETWDUZRCINIHU-UHFFFAOYSA-N 2-heptanol Chemical compound CCCCCC(C)O CETWDUZRCINIHU-UHFFFAOYSA-N 0.000 description 2
- ZDTRMJAWAIZCSV-UHFFFAOYSA-N 2-morpholin-4-ylethyl acetate Chemical compound CC(=O)OCCN1CCOCC1 ZDTRMJAWAIZCSV-UHFFFAOYSA-N 0.000 description 2
- ZPVFWPFBNIEHGJ-UHFFFAOYSA-N 2-octanone Chemical compound CCCCCCC(C)=O ZPVFWPFBNIEHGJ-UHFFFAOYSA-N 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- KUMXLFIBWFCMOJ-UHFFFAOYSA-N 3,3-dimethylhexane Chemical compound CCCC(C)(C)CC KUMXLFIBWFCMOJ-UHFFFAOYSA-N 0.000 description 2
- LAIUFBWHERIJIH-UHFFFAOYSA-N 3-Methylheptane Chemical compound CCCCC(C)CC LAIUFBWHERIJIH-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 2
- HCFAJYNVAYBARA-UHFFFAOYSA-N 4-heptanone Chemical compound CCCC(=O)CCC HCFAJYNVAYBARA-UHFFFAOYSA-N 0.000 description 2
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- RZKSECIXORKHQS-UHFFFAOYSA-N Heptan-3-ol Chemical compound CCCCC(O)CC RZKSECIXORKHQS-UHFFFAOYSA-N 0.000 description 2
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 2
- XYVQFUJDGOBPQI-UHFFFAOYSA-N Methyl-2-hydoxyisobutyric acid Chemical compound COC(=O)C(C)(C)O XYVQFUJDGOBPQI-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
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- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 150000008064 anhydrides Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- NMJJFJNHVMGPGM-UHFFFAOYSA-N butyl formate Chemical compound CCCCOC=O NMJJFJNHVMGPGM-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 150000003950 cyclic amides Chemical class 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- YROXEBCFDJQGOH-UHFFFAOYSA-N ditert-butyl piperazine-1,4-dicarboxylate Chemical compound CC(C)(C)OC(=O)N1CCN(C(=O)OC(C)(C)C)CC1 YROXEBCFDJQGOH-UHFFFAOYSA-N 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000004210 ether based solvent Substances 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 125000003709 fluoroalkyl group Chemical group 0.000 description 2
- VPVSTMAPERLKKM-UHFFFAOYSA-N glycoluril Chemical compound N1C(=O)NC2NC(=O)NC21 VPVSTMAPERLKKM-UHFFFAOYSA-N 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- QNVRIHYSUZMSGM-UHFFFAOYSA-N hexan-2-ol Chemical compound CCCCC(C)O QNVRIHYSUZMSGM-UHFFFAOYSA-N 0.000 description 2
- ZOCHHNOQQHDWHG-UHFFFAOYSA-N hexan-3-ol Chemical compound CCCC(O)CC ZOCHHNOQQHDWHG-UHFFFAOYSA-N 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 2
- AOGQPLXWSUTHQB-UHFFFAOYSA-N hexyl acetate Chemical compound CCCCCCOC(C)=O AOGQPLXWSUTHQB-UHFFFAOYSA-N 0.000 description 2
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Abstract
Description
フォトレジストオーバーコート組成物は、マトリックスポリマーと、添加剤ポリマーと、塩基消光剤と、有機溶媒とを含む。添加剤ポリマーは、マトリックスポリマーの表面エネルギーよりも低い表面エネルギーを有する。ネガティブトーン現像方法によりフォトレジスト層上にコーティングされたときに有用である本発明の組成物は、液浸液体を用いて改善された接触角特性、改善された焦点寛容度、改善された露光寛容度、低減した欠陥性、フォトレジスト及びオーバーコート成分が液浸液体内に浸出するのを回避するための効果的な障壁層性質、幾何学的に均一なレジストパターン、ならびにレジスト露光中の低下した反射性等のうちの1つ以上の様々な利点を提供することができる。本組成物を乾式リソグラフィーまたは液浸リソグラフィー方法で使用することができる。露光波長は、フォトレジスト組成物以外には特に限定されず、248nm、または193nm等の200nm以下(液浸または乾式リソグラフィー)、もしくはEUV波長(例えば13.4nm)が典型的である。
本発明で有用であるフォトレジスト組成物は、酸敏感性であるマトリックス樹脂を含む化学増幅型フォトレジスト組成物を含み、これにより、樹脂及び組成物層は、フォトレジスト組成物の層の一部として、ソフトベーキング、活性放射線への露光、及び露光後ベーキングに続き、光酸発生剤によって発生した酸との反応による有機現像液中の溶解度の変化を受けることを意味する。マトリックスポリマー内の光酸不安定エステルまたはアセタール基等の酸切断可能脱離基が、活性放射線に露光されかつ加熱処理されて光酸促進脱保護反応を受けて酸またはアルコール基を形成するとき、溶解度の変化がもたらされる。本発明で有用である好適なフォトレジスト組成物は、商業的に入手可能である。
本発明による方法を、ネガティブトーン現像によるフォトリソグラフィーパターンを形成するための例示的な方法フローを示す図1A〜Cを参照して以下に記載する。
IPAMA(20.68g)、IPCPMA(24.72g)、aGBLMA(27.78g)、X−GM−HL−2(17.26g)、及びHAMA(11.46g)のモノマーを、108.33gの乳酸エチル/γ−ブチロラクトン(gBL)(7/3)中で溶解した。そのモノマー溶液を、窒素で20分間バブリングすることによって脱気させた。乳酸エチル/γ−ブチロラクトン(gBL)(113g)を、コンデンサー及び機械的攪拌器に装備されている500mLのJacket反応器内に投入し、窒素で20分間バブリングすることによって脱気した。その後、反応フラスコ内の溶媒を80℃の温度の状態にした。V−601(ジメチル2、2−アゾジイソブチレート)(3.974g)は12gの乳酸エチル/gBL中で溶解して、開始溶液を、窒素で20分間バブリングすることによって脱気させた。その開始溶液を反応器内に添加し、次いでモノマー溶液を、激しい撹拌下かつ窒素環境下で、反応器液滴中に3.5時間にわたって供給した。モノマー供給が完了した後、重合混合物を80℃でさらに0.5時間放置した。反応が完了した後、重合混合物を室温まで冷却した。沈澱がMeOH(3000g)中で実現した。沈澱した粉末は濾過によって収集して終夜にわたって空気乾燥させ、120gのTHF中で再溶解させたところ、MeOH(3000g)中に再沈殿した。最終ポリマーを濾過して、終夜にわたって空気乾燥させて、真空下で48時間にわたって60℃でさらに乾燥させたところ、ポリマーPP−1(Mw=7785;PDI=1.36;収率=82.75%)がもたらされた。
30gのイソブチルメタクリレート(iBMA)及び10gのn−ブチルメタクリレート(nBMA)モノマーを、60gのPGMEA中で溶解した。そのモノマー溶液を、窒素で20分間バブリングすることによって脱気させた。PGMEA(32.890g)を、コンデンサー及び機械的攪拌器に装備されている500mLの三つ口フラスコ内に投入して、窒素で20分間バブリングすることによって脱気させた。その後、その反応フラスコ内の溶媒を80℃の温度の状態にした。V601(3.239g)を8gのPGMEA中で溶解し、その開始溶液を窒素で20分間バブリングすることによって脱気させた。その開始溶液を反応フラスコ内に添加し、次いで、モノマー溶液を、激しい撹拌及び窒素環境下で、反応器液滴中に3時間にわたって供給した。モノマー供給が完了した後、その重合混合物を80℃でさらに1時間放置した。合計4時間の重合時間(3時間の供給及び供給後の1時間の撹拌)の後、その重合混合物を室温まで冷却した。沈澱がメタノール/水(8/2)混合物(1730g)中で実現した。その沈澱したポリマーは濾過によって収集して終夜にわたって空気乾燥させて、120gのTHF中で再溶解させたところ、メタノール/水(8/2)混合物(1730g)中に再沈殿した。最終ポリマーを濾過して終夜にわたって空気乾燥させ、真空下で48時間にわたって25℃でさらに乾燥させたところ、33.1gのポリ(iBMA/nBMA)(75/25)コポリマー(MP−1)(Mw=9,203;Mw/Mn=1.60;収率=82.75%)がもたらされた。この合成の結果は表1に記載されている。
25gのPGMEAを200mlの反応器に投入して、窒素パージ下で30分間99℃まで加熱した。27.5gのMA−MIB−HFAモノマー、12.5gのMA−DM−EATfモノマー、及び10gの233−tMBAモノマーを、7.02gのPGMEA溶媒中で溶解し、次いでそのモノマー溶液を窒素でバブリングすることによって脱気させた。1.80gのV601(ジメチル2,2−アゾジイソブチレート)を16.18gのPGMEA中で溶解し、そのモノマー溶液を窒素でバブリングすることによって脱気させた。その開始溶液を、反応器液滴中に、0.150g/分の供給量で120分にわたって供給した。また、そのモノマー溶液も反応器液滴中に、激しい撹拌及び窒素環境下で、0.475g/分の供給量で120分にわたって供給した。供給が完了した後、その重合混合物をさらに2時間放置した。次いで、その重合混合物を室温まで冷却したところ、ポリ(MA−MIB−HFA/MA−DM−EATf/tMBA)(55/25/20)コポリマー(AP−1)(Mw=9017;Mw/Mn=1.87;収率=35.7%)の溶液がもたらされた。この合成の結果は表1に記載されている。
25gのPGMEAを200mlの反応器に投入して、窒素パージ下で30分99℃まで加熱した。40gのMA−MIB−HFAモノマーと10gの233−tMBAモノマーとを混合して、10gのPGMEA溶媒中で溶解した。1.50gのV601(ジメチル2,2−アゾジイソブチレート)を13.5gのPGMEA中で溶解した。そのモノマー及び開始溶液を、窒素でバブリングすることによって脱気させた。その開始溶液を、0.136g/分の供給量で反応器液滴内に110分にわたって供給した。また、そのモノマー溶液も、激しい撹拌及び窒素環境下で、0.545g/分の供給量で、反応器液滴内に110分にわたって供給した。供給が完了した後、その重合混合物をさらに2時間放置した。次いで、その重合混合物を室温まで冷却したところ、ポリ(MA−MIB−HFA/233−tMBA)(80/20)コポリマー(AP−2)(Mw=8945;Mw/Mn=1.91;収率=42.1%)の溶液がもたらされた。この合成の結果は表1に記載されている。
300gのイソブチルイソブチレート(IBIB)を2Lの反応器に投入して、窒素パージ下で99℃まで加熱した。400gのMA−MIB−HFAモノマー及び14.4gのV601(ジメチル2,2−アゾジイソブチレート)を285.7gのIBIB中で溶解し、そのモノマー溶液を窒素でバブリングすることによって脱気させ、その後、激しい撹拌及び窒素環境下で、反応器液滴中に120分の時間にわたって供給した。モノマー供給が完了した後、その重合混合物を99℃でさらに5時間放置した。次いで、その重合混合物を室温まで冷却したところ、ポリ(MA−MIB−HFA)ホモポリマー(AP−3)(Mw=6768;Mw/Mn=1.658;収率=29.83%)の溶液がもたらされた。この合成の結果は表1に記載されている。
53.94gのPGMEAを300mlの反応器に投入して、窒素パージ下で30分間99℃まで加熱した。57.18gのTBMAモノマーと50.7gのMHFPMAモノマーとを混合して、15.14gのPGMEA中で溶解した。そのモノマー溶液を窒素でバブリングすることによって脱気させた。3.88gのV601(ジメチル2,2−アゾジイソブチレート)を34.91gのPGMEA中で溶解して、その開始溶液を、0.353g/分の供給量で、反応器液滴内に110分にわたって供給した。また、そのモノマー溶液も、激しい撹拌及び窒素環境下で、1.118g/分の供給量で、反応器液滴内に110分にわたって供給した。供給が完了した後、その重合混合物をさらに2時間放置した。次いで、その重合混合物を室温まで冷却したところ、ポリ(TBMA/MHFPMA)コポリマー(AP−4)(Mw=10,944;Mw/Mn=1.74;収率=45.2%)の溶液がもたらされた。この合成の結果は、表1に記載されている。
PGMEA中の31.219gのポリマーPP−1溶液(10重量%)と、PGMEA中の5.415gのトリフェニルスルホニウムペルフルオロブタンスルホネート溶液(1重量%)と、PGMEA中の15.047gのトリフェニルスルホニウム2−(((3r,5r,7r)−アダマンタン−1−カルボニル)オキシ)−1,1−ジフルオロエタンスルホネート溶液(1重量%)と、PGMEA中の3.01gの2,2’−(ドデシルアザンジイル)ジエタノール溶液(1%)と、PGMEA中の14.336gのトリフェニルスルホニウム((1S,4S)−7,7−ジメチル−2−オキソビシクロ[2.2.1]ヘプタン−1−イル)メタンスルホネート(1%)と、21.324gのPGMEAと、9.650gのγ−ブチロラクトンとを4時間混合した。その混合物を0.2ミクロンのナイロンフィルターで濾過したところ、フォトレジスト組成物PC−1がもたらされた。
レジストオーバーコート組成物を、表2に明記された成分及び量を使用して、オーバーコートマトリックスポリマー、添加剤ポリマー、及び塩基消光剤を溶媒中で溶解することによって調製した。得た混合物を機械的ローラー上で3時間ロールし、次いで、0.2ミクロンの細孔径を有するテフロン(登録商標)フィルターを介して濾過した。その組成物を、到来波の波長の1/4に対応して、(約1500rpmでスピンコーティングした後の)対象の厚さ290Åに基づいて配合したところ、オーバーコート表面での反射率が低下した。
各レジストオーバーコート組成物では、脱イオン水に対する静的接触角(SCA)、後退接触角(RCA)、前進接触角(ACA)、及び滑り角(SA)を測定した。静的及び動的接触角は、KRUSS drop shape analyzer model100を使用して測定した。動的接触角測定では、脱イオン水の液滴の大きさは50μl(マイクロリットル)であり、ウェハステージの傾斜率はlユニット/秒であった。いったん水滴を試験ウェハ表面上に置くと、ウェハステージは直ちに傾斜し始めた。ウェハステージが傾斜している間、液滴がそのもとの位置から滑落するまで、1秒につき20フレームの割合で液滴のビデオを撮った。次いで、ビデオ内の各フレームを分析して、液滴がちょうど滑落し始めたときのフレーム上の液滴の画像を使用して、それらの対応する接線によって動的接触角(後退及び前進)を決定した。滑り角はウェハステージの傾斜角であり、液滴がちょうど滑落し始めたときのフレームに対応する。静的接触角測定では、水滴は2.5μlであり、傾斜していない試験ウェハ表面上に置いた。接触角は、液滴の両側の接線によって決定した。報告された静的接触角は、液滴の左側及び右側からの平均的な接触角であった。表面エネルギーは、拡張Fowkes理論を用いて、水の静的接触角に基づいて計算した。静的接触角(SCA)、後退接触角(RCA)、前進接触角(ACA)、及び滑り角(SA)の結果、ならびにOC−1(OC−1からのΔRCA)に対するRCAの差は、表3に明記されている。
乾式リソグラフィーを行い、オーバーコート組成物がリソグラフィー性能へ与える影響を調査した。ASML/1100スキャナーに連結するTEL CleanTrack ACT8では、200mmのケイ素ウェハを、AR(商標)19底部反射防止コーティング(BARC)材料(Rohm and Haas Electronic Materials,Marlborough,MA)でスピンコーティングして、205℃で60秒間ベーキングしたところ、860Åのフィルムの厚さがもたらされた。フォトレジスト組成物PC−1を、BARCがコーティングされたウェハ上にコーティングして、TEL CleanTrack ACT8コーター/現像液で60秒間90℃でソフトベーキングしたところ、1000Åのレジスト層厚がもたらされた。オーバーコート組成物を使用する場合は、レジストの頂部上にコーティングして、TEL CleanTrack ACT8コーター/現像液で60秒間90℃でソフトベーキングしたところ、290Åのレジストオーバーコートの厚さがもたらされた。そのウェハを、ASML1100スキャナーを使用した、0.75NA、0.89のアウターシグマ、及び0.64のインナーシグマを伴う四重極照明条件を用いて露光させた。その露光されたウェハは、90℃で60秒間露光後ベーキングして、n−ブチルアセテート(NBA)現像液を用いて、TEL CleanTrack ACT8コーター/現像液で、30秒間現像した。同じマスク特徴(6%のPSM)で200nmのピッチを有する密集コンタクトホールの場合、臨界寸法(CD)は100nmを対象として、200K倍率を有するHitachi9380CD SEMでホールパターンの直径が測定された。
EL=(1.1×CDt〜0.9×CDt)/(1.1×CDtのEopt〜0.9×CDtのEopt)
表5に明記されている成分を用いて、9gのマトリックスポリマー、0.95gの添加剤ポリマー、及び0.05gのtert−ブチル4−ヒドロキシピペリジン−1−カルボキシレートを990gの溶媒中で溶解することによって、レジストオーバーコート組成物を調製する。得た混合物は機械的ローラー上で3時間ロールし、次いで、0.2ミクロンの細孔径を有するテフロン(登録商標)フィルターを介して濾過する。
300mmのケイ素ウェハを、AR(商標)19底部反射防止コーティング(BARC)材料(Rohm and Haas Electronic Materials,Marlborough,MA)を用いてスピンコーティングして、205℃で60秒間ベーキングすると、860Åのフィルムの厚さがもたらされる。フォトレジスト組成物PC−1を、BARCがコーティングされたウェハ上でスピンコーティングして、90℃で60秒間ソフトベーキングすると、1000Åのレジスト層厚がもたらされる。表5のオーバーコート組成物をレジストの頂部上でスピンコーティングして、90℃で60秒間ソフトベーキングすると、レジストオーバーコート層がもたらされる。ウェハを液浸スキャナー上で露光させ、次いで、スピンコーター上で2−ヘプタノンを用いて25秒間現像すると、ネガティブトーンパターンがもたらされる。
Claims (10)
- パターン形成方法であって、
(a)1つ以上の被パターン化層を備える半導体基板を提供することと、
(b)前記1つ以上の被パターン化層上にフォトレジスト層であって、酸不安定基と、光酸発生剤と、有機溶媒とを有するユニットを含むマトリックスポリマーを含む組成物から形成される、フォトレジスト層を形成することと、
(c)前記フォトレジスト層上にフォトレジストオーバーコート組成物であって、マトリックスポリマーと、添加剤ポリマーと、塩基消光剤と、有機溶媒とを含み、前記添加剤ポリマーが前記マトリックスポリマーの表面エネルギーよりも低い表面エネルギーを有し、前記添加剤ポリマーが前記オーバーコート組成物の全固形分に基づいて、1〜20重量%の量で前記オーバーコート組成物中に存在する、フォトレジストオーバーコート組成物をコーティングすることと、
(d)前記フォトレジスト層を活性化放射線に露光することと、
(e)前記基板を露光後ベーキング方法で加熱することと、
(f)有機溶媒現像液を用いて露光されたフィルムを現像することと、を含む、前記方法。 - 前記添加剤ポリマーがケイ素原子を含有するユニットを含む、請求項1に記載の前記方法。
- 前記添加剤ポリマーがフッ素原子を含有するユニットを含む、請求項1に記載の前記方法。
- 前記添加剤ポリマーがフルオロアルコールを含有するユニットを含む、請求項3に記載の前記方法。
- 前記マトリックスポリマーが、以下の一般式(I)のモノマーから形成されたユニットを含み、
- 前記添加剤ポリマーが、以下の一般式(II)または(III)を有するモノマーから形成され、
- 前記塩基消光剤が前記マトリックスポリマー上に塩基性部分を含む、請求項1〜6のいずれかに記載の前記方法。
- 前記塩基消光剤が前記マトリックスポリマーとは別の添加剤を含む、請求項1〜7のいずれかに記載の前記方法。
- 前記添加剤ポリマーが、前記オーバーコート組成物の全固形分に基づいて、3〜15重量%の量で前記オーバーコート組成物中に存在する、請求項1〜7のいずれかに記載の前記方法。
- 前記フォトレジスト層が、液浸リソグラフィー方法で前記活性化放射線に露光される、請求項1〜9のいずれかに記載の前記方法。
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JPWO2016136354A1 (ja) * | 2015-02-26 | 2017-08-03 | 富士フイルム株式会社 | パターン形成方法、レジストパターン、電子デバイスの製造方法、及び、電子デバイス |
JP2019028286A (ja) * | 2017-07-31 | 2019-02-21 | 信越化学工業株式会社 | レジスト組成物及びパターン形成方法 |
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KR20150079487A (ko) * | 2013-12-31 | 2015-07-08 | 롬 앤드 하스 일렉트로닉 머트어리얼즈 엘엘씨 | 포토리소그래피 방법 |
US10133179B2 (en) * | 2016-07-29 | 2018-11-20 | Rohm And Haas Electronic Materials Llc | Pattern treatment methods |
US11940731B2 (en) | 2018-06-30 | 2024-03-26 | Rohm And Haas Electronic Materials Llc | Photoresist topcoat compositions and methods of processing photoresist compositions |
US11567408B2 (en) * | 2019-10-15 | 2023-01-31 | Rohm And Haas Electronic Materials Korea Ltd. | Coating composition for use with an overcoated photoresist |
US11940732B2 (en) * | 2020-05-02 | 2024-03-26 | Rohm And Haas Electronic Materials Llc | Coating compositions and methods of forming electronic devices |
US11656550B2 (en) | 2020-09-01 | 2023-05-23 | Tokyo Electron Limited | Controlling semiconductor film thickness |
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TWI582536B (zh) | 2017-05-11 |
KR102269796B1 (ko) | 2021-06-25 |
KR20190093540A (ko) | 2019-08-09 |
US20190204742A1 (en) | 2019-07-04 |
CN105573063A (zh) | 2016-05-11 |
CN105573063B (zh) | 2017-11-24 |
US20160124309A1 (en) | 2016-05-05 |
KR20170142952A (ko) | 2017-12-28 |
KR102008264B1 (ko) | 2019-08-07 |
JP6138886B2 (ja) | 2017-05-31 |
TW201616240A (zh) | 2016-05-01 |
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