JP3722538B2 - Positive photoresist composition - Google Patents
Positive photoresist composition Download PDFInfo
- Publication number
- JP3722538B2 JP3722538B2 JP04458796A JP4458796A JP3722538B2 JP 3722538 B2 JP3722538 B2 JP 3722538B2 JP 04458796 A JP04458796 A JP 04458796A JP 4458796 A JP4458796 A JP 4458796A JP 3722538 B2 JP3722538 B2 JP 3722538B2
- Authority
- JP
- Japan
- Prior art keywords
- composition
- adhesion
- group
- weight
- positive photoresist
- 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.)
- Expired - Fee Related
Links
- 239000000203 mixture Substances 0.000 title claims description 24
- 229920002120 photoresistant polymer Polymers 0.000 title claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 15
- WTQZSMDDRMKJRI-UHFFFAOYSA-N 4-diazoniophenolate Chemical group [O-]C1=CC=C([N+]#N)C=C1 WTQZSMDDRMKJRI-UHFFFAOYSA-N 0.000 claims description 11
- 229920003986 novolac Polymers 0.000 claims description 11
- 125000006527 (C1-C5) alkyl group Chemical group 0.000 claims description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 239000010408 film Substances 0.000 description 18
- 239000000758 substrate Substances 0.000 description 15
- 229910052581 Si3N4 Inorganic materials 0.000 description 12
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 12
- 150000002460 imidazoles Chemical class 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000002904 solvent Substances 0.000 description 6
- OSSNTDFYBPYIEC-UHFFFAOYSA-N 1-ethenylimidazole Chemical compound C=CN1C=CN=C1 OSSNTDFYBPYIEC-UHFFFAOYSA-N 0.000 description 5
- -1 benzophenone compound Chemical class 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 4
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 4
- IWDCLRJOBJJRNH-UHFFFAOYSA-N p-cresol Chemical compound CC1=CC=C(O)C=C1 IWDCLRJOBJJRNH-UHFFFAOYSA-N 0.000 description 4
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 4
- NKTOLZVEWDHZMU-UHFFFAOYSA-N 2,5-xylenol Chemical compound CC1=CC=C(C)C(O)=C1 NKTOLZVEWDHZMU-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 150000001299 aldehydes Chemical class 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000003623 enhancer Substances 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 150000002989 phenols Chemical class 0.000 description 3
- 238000001259 photo etching Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- OGRAOKJKVGDSFR-UHFFFAOYSA-N 2,3,5-trimethylphenol Chemical compound CC1=CC(C)=C(C)C(O)=C1 OGRAOKJKVGDSFR-UHFFFAOYSA-N 0.000 description 2
- IXQGCWUGDFDQMF-UHFFFAOYSA-N 2-Ethylphenol Chemical compound CCC1=CC=CC=C1O IXQGCWUGDFDQMF-UHFFFAOYSA-N 0.000 description 2
- YCOXTKKNXUZSKD-UHFFFAOYSA-N 3,4-xylenol Chemical compound CC1=CC=C(O)C=C1C YCOXTKKNXUZSKD-UHFFFAOYSA-N 0.000 description 2
- HMNKTRSOROOSPP-UHFFFAOYSA-N 3-Ethylphenol Chemical compound CCC1=CC=CC(O)=C1 HMNKTRSOROOSPP-UHFFFAOYSA-N 0.000 description 2
- HXDOZKJGKXYMEW-UHFFFAOYSA-N 4-ethylphenol Chemical compound CCC1=CC=C(O)C=C1 HXDOZKJGKXYMEW-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 239000003054 catalyst Substances 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 2
- 229940074391 gallic acid Drugs 0.000 description 2
- 235000004515 gallic acid Nutrition 0.000 description 2
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- QWVGKYWNOKOFNN-UHFFFAOYSA-N o-cresol Chemical compound CC1=CC=CC=C1O QWVGKYWNOKOFNN-UHFFFAOYSA-N 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 229940079877 pyrogallol Drugs 0.000 description 2
- 230000008313 sensitization Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- ZRDYULMDEGRWRC-UHFFFAOYSA-N (4-hydroxyphenyl)-(2,3,4-trihydroxyphenyl)methanone Chemical compound C1=CC(O)=CC=C1C(=O)C1=CC=C(O)C(O)=C1O ZRDYULMDEGRWRC-UHFFFAOYSA-N 0.000 description 1
- OQZDJLFNMXRJHZ-UHFFFAOYSA-N 1-benzyl-2-ethylimidazole Chemical compound CCC1=NC=CN1CC1=CC=CC=C1 OQZDJLFNMXRJHZ-UHFFFAOYSA-N 0.000 description 1
- FBHPRUXJQNWTEW-UHFFFAOYSA-N 1-benzyl-2-methylimidazole Chemical group CC1=NC=CN1CC1=CC=CC=C1 FBHPRUXJQNWTEW-UHFFFAOYSA-N 0.000 description 1
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 1
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 1
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
- HTQNYBBTZSBWKL-UHFFFAOYSA-N 2,3,4-trihydroxbenzophenone Chemical compound OC1=C(O)C(O)=CC=C1C(=O)C1=CC=CC=C1 HTQNYBBTZSBWKL-UHFFFAOYSA-N 0.000 description 1
- QWBBPBRQALCEIZ-UHFFFAOYSA-N 2,3-dimethylphenol Chemical compound CC1=CC=CC(O)=C1C QWBBPBRQALCEIZ-UHFFFAOYSA-N 0.000 description 1
- KLIDCXVFHGNTTM-UHFFFAOYSA-N 2,6-dimethoxyphenol Chemical compound COC1=CC=CC(OC)=C1O KLIDCXVFHGNTTM-UHFFFAOYSA-N 0.000 description 1
- XXXFZKQPYACQLD-UHFFFAOYSA-N 2-(2-hydroxyethoxy)ethyl acetate Chemical compound CC(=O)OCCOCCO XXXFZKQPYACQLD-UHFFFAOYSA-N 0.000 description 1
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 1
- HXDLWJWIAHWIKI-UHFFFAOYSA-N 2-hydroxyethyl acetate Chemical compound CC(=O)OCCO HXDLWJWIAHWIKI-UHFFFAOYSA-N 0.000 description 1
- PPPFYBPQAPISCT-UHFFFAOYSA-N 2-hydroxypropyl acetate Chemical compound CC(O)COC(C)=O PPPFYBPQAPISCT-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- XYJFAQCWRMHWFT-UHFFFAOYSA-N 2-sulfonylnaphthalene-1,4-dione Chemical class S(=O)(=O)=C1C(C2=CC=CC=C2C(C1)=O)=O XYJFAQCWRMHWFT-UHFFFAOYSA-N 0.000 description 1
- WJQOZHYUIDYNHM-UHFFFAOYSA-N 2-tert-Butylphenol Chemical compound CC(C)(C)C1=CC=CC=C1O WJQOZHYUIDYNHM-UHFFFAOYSA-N 0.000 description 1
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 description 1
- XOUQAVYLRNOXDO-UHFFFAOYSA-N 2-tert-butyl-5-methylphenol Chemical compound CC1=CC=C(C(C)(C)C)C(O)=C1 XOUQAVYLRNOXDO-UHFFFAOYSA-N 0.000 description 1
- QQOMQLYQAXGHSU-UHFFFAOYSA-N 236TMPh Natural products CC1=CC=C(C)C(O)=C1C QQOMQLYQAXGHSU-UHFFFAOYSA-N 0.000 description 1
- CYEKUDPFXBLGHH-UHFFFAOYSA-N 3-tert-Butylphenol Chemical compound CC(C)(C)C1=CC=CC(O)=C1 CYEKUDPFXBLGHH-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- QHPQWRBYOIRBIT-UHFFFAOYSA-N 4-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C=C1 QHPQWRBYOIRBIT-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- XXRCUYVCPSWGCC-UHFFFAOYSA-N Ethyl pyruvate Chemical compound CCOC(=O)C(C)=O XXRCUYVCPSWGCC-UHFFFAOYSA-N 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004693 Polybenzimidazole Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 150000001556 benzimidazoles Chemical class 0.000 description 1
- 125000003785 benzimidazolyl group Chemical group N1=C(NC2=C1C=CC=C2)* 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- JWAZRIHNYRIHIV-UHFFFAOYSA-N beta-hydroxynaphthyl Natural products C1=CC=CC2=CC(O)=CC=C21 JWAZRIHNYRIHIV-UHFFFAOYSA-N 0.000 description 1
- 229950011260 betanaphthol Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940043232 butyl acetate Drugs 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229940093499 ethyl acetate Drugs 0.000 description 1
- 229940116333 ethyl lactate Drugs 0.000 description 1
- 229940117360 ethyl pyruvate Drugs 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical compound [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 description 1
- 239000011654 magnesium acetate Substances 0.000 description 1
- 229940069446 magnesium acetate Drugs 0.000 description 1
- 235000011285 magnesium acetate Nutrition 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- HSDFKDZBJMDHFF-UHFFFAOYSA-N methyl 3-ethoxypropanoate Chemical compound CCOCCC(=O)OC HSDFKDZBJMDHFF-UHFFFAOYSA-N 0.000 description 1
- BDJSOPWXYLFTNW-UHFFFAOYSA-N methyl 3-methoxypropanoate Chemical compound COCCC(=O)OC BDJSOPWXYLFTNW-UHFFFAOYSA-N 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- XOOMNEFVDUTJPP-UHFFFAOYSA-N naphthalene-1,3-diol Chemical compound C1=CC=CC2=CC(O)=CC(O)=C21 XOOMNEFVDUTJPP-UHFFFAOYSA-N 0.000 description 1
- FZZQNEVOYIYFPF-UHFFFAOYSA-N naphthalene-1,6-diol Chemical compound OC1=CC=CC2=CC(O)=CC=C21 FZZQNEVOYIYFPF-UHFFFAOYSA-N 0.000 description 1
- ZUVBIBLYOCVYJU-UHFFFAOYSA-N naphthalene-1,7-diol Chemical compound C1=CC=C(O)C2=CC(O)=CC=C21 ZUVBIBLYOCVYJU-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- ATGUVEKSASEFFO-UHFFFAOYSA-N p-aminodiphenylamine Chemical compound C1=CC(N)=CC=C1NC1=CC=CC=C1 ATGUVEKSASEFFO-UHFFFAOYSA-N 0.000 description 1
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- LYKRPDCJKSXAHS-UHFFFAOYSA-N phenyl-(2,3,4,5-tetrahydroxyphenyl)methanone Chemical compound OC1=C(O)C(O)=CC(C(=O)C=2C=CC=CC=2)=C1O LYKRPDCJKSXAHS-UHFFFAOYSA-N 0.000 description 1
- PJGSXYOJTGTZAV-UHFFFAOYSA-N pinacolone Chemical compound CC(=O)C(C)(C)C PJGSXYOJTGTZAV-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002480 polybenzimidazole Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
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- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は紫外線、遠紫外線(エキシマレーザーなどを含む)、電子線、イオンビーム、X線などの放射線に感応するポジ型フォトレジスト組成物に関する。さらに詳しくは、半導体デバイスやLCD(薄膜トランジスタ)などの製造における基板との密着性に優れたレジストパターンを形成することができる新規なポジ型フォトレジスト組成物に関する。
【0002】
【従来の技術】
従来、ICやLSIなどの半導体デバイスやLCDなどの液晶表示素子の製造プロセスにおいてフォトエッチング法による微細加工が行われている。このフォトエッチング法では、基板上にフォトレジストを塗布し、その上にマスクパターンを介して紫外線などの活性光線を照射後、現像して得られたレジストパターンを保護膜として該基板をエッチングするという方法がとられている。そして、この方法において用いられるフォトレジスト組成物としては、被膜形成用のアルカリ可溶性ノボラック型樹脂と、キノンジアジド基含有ベンゾフェノン系化合物からなる感光成分との組み合わせが好適であることが知られている(例えば、米国特許第4377631号明細書、特開昭62−35349号公報、特開平1−142548号公報、特開平1−179147号公報)。
【0003】
ところで、半導体デバイスやLCDなどの製造に於けるフォトエッチング法では基板を精度良くエッチングするためにレジストパターンと該基板との密着性が重要であり、この密着性が悪いとウェットエッチング時の食い込み量が大きくなり、パターンの短絡が起こり不都合である。これに対し、イミダゾリンを配合することにより酸化物に対するポジ型フォトレジストの密着性を向上させ得ることが知られている(特開昭51−47574号公報)。
【0004】
また、ベンゾイミダゾール類やポリベンゾイミダゾールを配合することによりシリコン基板やタンタルなどの金属基板に対し、密着性を向上しうることが知られている(特開平6−27657号公報)。しかしながら、これらの化合物を添加することによりレジストの保存安定性が損なわれるという欠点がある。
【0005】
尚、同じイミダゾール類のなかでも、置換基に、ビニル基、ベンジル基、アルキル基がついたものについては密着性向上の可能性については知られていない。
【0006】
【発明が解決しようとする課題】
本発明は、レジストの保存安定性を損なうことなく半導体デバイスやLCDなどの製造における基板に対して密着性の優れたレジストパターンを形成できる、アルカリ可溶性ノボラック型樹脂を用いたポジ型フォトレジスト組成物を提供することを目的としてなされたものである。
【0007】
【課題を解決するための手段】
本発明者等は、上記目的に適う組成物を得るべく鋭意研究を重ねた結果、アルカリ可溶性ノボラック型樹脂とキノンジアジド基含有化合物とからなる組成物に対し、ある種のイミダゾール類を添加することにより、その目的を達成し得ることを見出し、この知見に基づいて本発明を完成するに至った。
【0008】
すなわち本発明は、ポジ型フォトレジスト組成物であって、アルカリ可溶性ノボラック型樹脂と、キノンジアジド基含有化合物とからなる基本組成に対し、次式(I)
【0009】
【化2】
【0010】
(式中、R1 は、ビニル基、ベンジル基、C1〜C5のアルキル基、水素原子を表し、R2 は、C1〜C5のアルキル基、水素原子を表す)で表される化合物(イミダゾール類)を密着増強剤として含有させることを特徴とする。
【0011】
本発明の組成物においては、被膜形成用物質としてアルカリ可溶性ノボラック型樹脂が用いられる。
このアルカリ可溶性ノボラック型樹脂についてはフェノール類とアルデヒド類との反応生成物が挙げられる。
フェノール類としては、フェノール、o−、m−又はp−クレゾール、2,5−キシレノール、3,6−キシレノール、3,4−キシレノール、2,3,5−トリメチルフェノール、4−t−ブチルフェノール、2−t−ブチルフェノール、3−t−ブチルフェノール、2−エチルフェノール、3−エチルフェノール、4−エチルフェノール、3−メチル−6−t−ブチルフェノール、4−メチル−2−t−ブチルフェノール、2−ナフトール、1,3−ジヒドロキシナフタレン、1,6−ジヒドロキシナフタレン、1,7−ジヒドロキシナフタレンなどの芳香族ヒドロキシ化合物が挙げられる。
アルデヒド類としては、ホルムアルデヒド、パラホルムアルデヒド、アセトアルデヒド、プロピルアルデヒド、ベンズアルデヒド、フェニルアルデヒドなどが挙げられる。
フェノール類とアルデヒド類の反応は触媒の存在下で行われ、パルク又は溶媒中で行われる。
触媒としては有機酸(蟻酸、シュウ酸、p−トルエンスルホン酸、トリクロロ酢酸など)、無機酸(燐酸、塩酸、硫酸、過塩素酸など)、2価金属塩(酢酸亜鉛、酢酸マグネシウムなど)が挙げられる。
【0012】
本発明の組成物においては、感光性成分として、キノンジアジド基含有化合物が用いられる。このキノンジアジド基含有化合物としては、例えば2,3,4−トリヒドロキシベンゾフェノン、2,3,4,4′−テトラヒドロキシベンゾフェノンなどのポリヒドロキシベンゾフェノンとナフトキノン−1,2−ジアジド−5−スルホン酸又はナフトキノン−1,2−ジアジド−4−スルホン酸との完全エステル化合物や部分エステル化合物などを挙げることができる。
【0013】
また、他のキノンジアジド基含有化合物、例えばオルソベンゾキノンジアジド、オルソナフトキノンジアジド、オルソアントラキノンジアジド又はオルソナフトキノンジアジドスルホン酸エステル類などのこれら核置換誘導体、更にはオルソナフトキノンスルホニルクロリドと水酸基又はアミノ基を持つ化合物例えばフェノール、p−メトキシフェノール、ジメチルフェノール、ヒドロキノン、ビスフェノールA、ナフトール、カルビノール、ピロカテコール、ピロガロール、ピロガロールモノメチルエーテル、ピロガロール−1,3−ジメチルエーテル、没食子酸、水酸基を一部残してエステル化又はエーテル化された没食子酸、アニリン、p−アミノジフェニルアミンなどとの反応生成物なども用いることができる。これらは単独で用いても良いし、また2種類以上を組み合わせて用いても良い。
【0014】
これらのキノンジアジド基含有化合物は、例えば前記ポリヒドロキシベンゾフェノンとナフトキノン−1,2−ジアジド−5−スルホニルクロリド又はナフトキノン−1,2−ジアジド−4−スルホニルクロリドとをジオキサンなどの適当な溶媒中において、トリエタノールアミン、炭酸アルカリ、炭酸水素アルカリなどのアルカリ存在下に縮合させ、完全エステル化又は部分エステル化することにより製造することができる。
【0015】
本発明の組成物においては、密着増強剤として、前記の式(I)で表されるイミダゾール類の中から選ばれた化合物を用いることが必要である。
【0016】
前記の式(I)で表されるイミダゾール類の具体例としては、1−ビニルイミダゾール、1−ベンジル−2−エチルイミダゾールなどが挙げられる。
【0017】
本発明においては、このイミダゾール類は1種のみ用いても良いし、2種以上組み合わせて使用しても良い。
【0018】
また、密着増強剤のイミダゾール類の添加量は、アルカリ可溶性ノボラック型樹脂とキノンジアジド基含有化合物とからなる基本組成の合計量100重量部に対し0.05〜20重量部、好ましくは0.5〜10重量部の範囲で選ばれる。この量が0.05重量部未満では十分な密着性向上効果は得られず、20重量部を超えると、量の割には密着性向上の効果が得られず、感度も低下するため好ましくない。
【0019】
尚、本発明の組成物における基本組成中のアルカリ可溶性ノボラック型樹脂とキノンジアジド基含有化合物との割合は、前者100重量部に対し、後者5〜40重量部、好ましくは10〜30重量部の範囲内である。
【0020】
本発明の組成物は、更に必要に応じて相溶性のある添加物、例えばレジスト膜の性能などを改良するための樹脂、可塑剤、安定剤、界面活性剤、現像後のレジストパターンの視認性を良くするための染料、増感効果を向上させる増感剤などの慣用されている成分を添加含有させることができる。
【0021】
本発明の組成物は、アルカリ可溶性ノボラック型樹脂と、キノンジアジド基含有化合物と、ある種のイミダゾール類と、所望に応じて用いられる各種添加成分とを適当な溶剤に溶解した溶液の形で用いる。
【0022】
溶剤としては、2−ヘプタノン、アセトン、メチルエチルケトン、1,1,1−トリメチルアセトンなどのケトン類、エチレングリコールモノアセテート、プロピレングリコールモノアセテート、ジエチレングリコール又はジエチレングリコールモノアセテートのモノメチルエーテル、モノエチルエーテル、モノプロピルエーテル、モノブチルエーテル又はモノフェニルエーテルなどの多価アルコール類およびその誘導体や、ジオキサンのような環式エーテル類や、乳酸エチル、酢酸メチル、酢酸エチル、酢酸ブチル、プロピオン酸メチル、ピルビン酸エチル、3−メトキシプロピオン酸メチル、3−エトキシプロピオン酸メチルなどのエステル類が挙げられる。これら溶剤は、単独で用いても良いし、2種以上を組み合わせて用いても構わない。その使用量は、基板上に、均質でピンホール、塗りむらの無い塗布膜ができる塗布が可能でであれば特に制限はされない。通常、全レジストに対し溶剤量が50〜97重量%になるように調製する。
【0023】
本発明の組成物の好適な使用方法の1例を以下に示す。
【0024】
先ず、前記の各成分を含むポジ型フォトレジスト液を基板上にスピンナーで塗布し、乾燥してフォトレジスト層を形成する。これに低圧水銀灯、高圧水銀灯、超高圧水銀灯、アーク灯、キセノンランプなどを用いて紫外線を所定のマスクパターンを介して露光する。
【0025】
次に、これを現像液、例えば1〜10重量%のテトラメチルアンモニウムヒドロキシド水溶液のような弱アルカリ性水溶液に浸漬すると、露光された部分が選択的に溶解除去され、マスクパターンに忠実なレジストパターンを基板上に形成することができる。次いで、得られたレジストパターンをマスクとして露出した基板を公知の方法でエッチングした後、レジストパターンを剥離することにより回路パターンが基板上に形成される。
【0026】
【実施例】
以下に、実施例により本発明を更に詳細に説明する。ただし、本発明はこれらの例によってなんら限定されるものではない。
【0027】
実施例1
m−クレゾールとp−クレゾールとを重量比4:6で混合したものを用い、常法により製造したクレゾールノボラック型樹脂(重量平均分子量5,000)100gと、2,3,4,4′−テトラヒドロキシベンゾフェノンのナフトキノン−1,2−ジアジド−5−スルフォン酸エステル20gと、1−ビニルイミダゾール6gとをエチレングリコールモノエチルエーテルアセテート500gに溶解して調製したポジ型フォトレジスト溶液を、シリコン窒化膜をガラス基板上に堆積させた基板上に、膜厚1.5μm になるようにスピンナー塗布した後、ホットプレート上で110度×120秒間ベークし、テストパターンマスクを介してコンタクト露光装置PLA−500F(キヤノン社製)を用いて露光を行った。
【0028】
次いで、2.38重量%テトラメチルアンモニウムヒドロキシド水溶液中に60秒間浸漬することにより、露光部分を除去し、シリコン窒化膜上にレジストパターンを形成した後、対流式オーブン内で130度×30分間ベークし、露出したシリコン窒化膜をマスクとして高純度バッファードフッ酸(橋本化成社製)中に20分間浸漬することによりシリコン窒化膜をエッチングした。次いで、レジストパターンとシリコン窒化膜との密着性を評価するため、光学式顕微鏡で10μm パターンでのエッチングによるシリコン窒化膜の食い込み量を観察した結果、食い込み量は1μm であり、良好な密着性が確認された。
【0029】
実施例2
実施例1の1−ビニルイミダゾールを1−ベンジル−2−メチルイミダゾールに代えたこと以外は実施例1と同様にしてシリコン窒化膜をエッチングし、次いで、レジストパターンとシリコン窒化膜との密着性を評価した結果、食い込み量は1μm であり、良好な密着性が確認された。
【0030】
比較例1
実施例1の1−ビニルイミダゾールを配合しなかったこと以外は実施例1と同様にしてシリコン窒化膜をエッチングし、次いで、レジストパターンとシリコン窒化膜との密着性を評価した結果、食い込み量は3μm であった。
【0031】
比較例2
実施例1の1−ビニルイミダゾールをベンゾイミダゾールに代えたこと以外は実施例1と同様にしてシリコン窒化膜をエッチングし、次いで、レジストパターンとシリコン窒化膜との密着性を評価した結果、食い込み量は1μm であり、良好な密着性が確認された。しかしながら、該レジストは、ベンゾイミダゾール添加1日後には該レジストの色が通常の赤褐色から暗赤褐色に変わり、レジストの変質が明らかに認められた。
【0032】
【発明の効果】
本発明の組成物によれば、レジストの保存安定性を損なうことなく半導体デバイスやLCDの製造における基板との密着性に優れたレジストパターンを形成することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a positive photoresist composition that is sensitive to radiation such as ultraviolet rays, far ultraviolet rays (including excimer lasers), electron beams, ion beams, and X-rays. More specifically, the present invention relates to a novel positive photoresist composition capable of forming a resist pattern having excellent adhesion to a substrate in the manufacture of semiconductor devices, LCDs (thin film transistors) and the like.
[0002]
[Prior art]
Conventionally, fine processing by a photoetching method is performed in a manufacturing process of a semiconductor device such as an IC or LSI and a liquid crystal display element such as an LCD. In this photo-etching method, a photoresist is applied on a substrate, irradiated with an actinic ray such as ultraviolet rays through a mask pattern thereon, and then the substrate is etched using the resist pattern obtained by development as a protective film. The method is taken. As a photoresist composition used in this method, it is known that a combination of an alkali-soluble novolak resin for film formation and a photosensitive component comprising a quinonediazide group-containing benzophenone compound is suitable (for example, U.S. Pat. No. 4,377,761, JP-A-62-35349, JP-A-1-142548, JP-A-1-179147).
[0003]
By the way, in the photoetching method in the manufacture of semiconductor devices, LCDs, etc., the adhesion between the resist pattern and the substrate is important in order to etch the substrate with high precision. Becomes larger, causing a short circuit of the pattern, which is inconvenient. On the other hand, it is known that the adhesion of a positive photoresist to an oxide can be improved by blending imidazoline (Japanese Patent Laid-Open No. 51-47574).
[0004]
In addition, it is known that adhesion to a metal substrate such as a silicon substrate or tantalum can be improved by blending benzimidazoles or polybenzimidazole (JP-A-6-27657). However, there is a drawback that the storage stability of the resist is impaired by adding these compounds.
[0005]
Among the same imidazoles, those having a vinyl group, benzyl group, or alkyl group as a substituent are not known about the possibility of improving adhesion.
[0006]
[Problems to be solved by the invention]
The present invention relates to a positive photoresist composition using an alkali-soluble novolac resin, which can form a resist pattern having excellent adhesion to a substrate in the production of semiconductor devices, LCDs and the like without impairing the storage stability of the resist. It was made for the purpose of providing.
[0007]
[Means for Solving the Problems]
As a result of intensive studies to obtain a composition suitable for the above purpose, the present inventors have added a certain imidazole to a composition comprising an alkali-soluble novolac resin and a quinonediazide group-containing compound. The inventors have found that the object can be achieved, and have completed the present invention based on this finding.
[0008]
That is, the present invention is a positive photoresist composition, which has the following formula (I) with respect to a basic composition comprising an alkali-soluble novolac resin and a quinonediazide group-containing compound.
[0009]
[Chemical formula 2]
[0010]
Wherein R 1 represents a vinyl group, a benzyl group, a C1-C5 alkyl group or a hydrogen atom, and R 2 represents a C1-C5 alkyl group or a hydrogen atom (imidazoles). ) As an adhesion enhancer.
[0011]
In the composition of the present invention, an alkali-soluble novolac resin is used as the film forming substance.
Examples of the alkali-soluble novolac resin include reaction products of phenols and aldehydes.
Phenols include phenol, o-, m- or p-cresol, 2,5-xylenol, 3,6-xylenol, 3,4-xylenol, 2,3,5-trimethylphenol, 4-t-butylphenol, 2-t-butylphenol, 3-t-butylphenol, 2-ethylphenol, 3-ethylphenol, 4-ethylphenol, 3-methyl-6-t-butylphenol, 4-methyl-2-t-butylphenol, 2-naphthol Aromatic hydroxy compounds such as 1,3-dihydroxynaphthalene, 1,6-dihydroxynaphthalene and 1,7-dihydroxynaphthalene.
Examples of aldehydes include formaldehyde, paraformaldehyde, acetaldehyde, propyl aldehyde, benzaldehyde, and phenylaldehyde.
The reaction of phenols and aldehydes is carried out in the presence of a catalyst, and is carried out in a park or a solvent.
Catalysts include organic acids (formic acid, oxalic acid, p-toluenesulfonic acid, trichloroacetic acid, etc.), inorganic acids (phosphoric acid, hydrochloric acid, sulfuric acid, perchloric acid, etc.), divalent metal salts (zinc acetate, magnesium acetate, etc.) Can be mentioned.
[0012]
In the composition of the present invention, a quinonediazide group-containing compound is used as the photosensitive component. Examples of the quinonediazide group-containing compound include polyhydroxybenzophenone such as 2,3,4-trihydroxybenzophenone and 2,3,4,4′-tetrahydroxybenzophenone and naphthoquinone-1,2-diazide-5-sulfonic acid or Examples thereof include complete ester compounds and partial ester compounds with naphthoquinone-1,2-diazide-4-sulfonic acid.
[0013]
In addition, other quinonediazide group-containing compounds such as orthobenzoquinonediazide, orthonaphthoquinonediazide, orthoanthraquinonediazide or orthonaphthoquinonediazidesulfonic acid esters, and further compounds having orthonaphthoquinonesulfonyl chloride and a hydroxyl group or amino group For example, phenol, p-methoxyphenol, dimethylphenol, hydroquinone, bisphenol A, naphthol, carbinol, pyrocatechol, pyrogallol, pyrogallol monomethyl ether, pyrogallol-1,3-dimethyl ether, gallic acid, esterified with some hydroxyl groups remaining A reaction product with etherified gallic acid, aniline, p-aminodiphenylamine or the like can also be used. These may be used alone or in combination of two or more.
[0014]
These quinonediazide group-containing compounds include, for example, the polyhydroxybenzophenone and naphthoquinone-1,2-diazide-5-sulfonyl chloride or naphthoquinone-1,2-diazide-4-sulfonyl chloride in a suitable solvent such as dioxane. It can be produced by condensation in the presence of an alkali such as triethanolamine, alkali carbonate, alkali hydrogen carbonate, etc., and complete esterification or partial esterification.
[0015]
In the composition of the present invention, it is necessary to use a compound selected from the imidazoles represented by the formula (I) as an adhesion enhancer.
[0016]
Specific examples of the imidazoles represented by the formula (I) include 1-vinylimidazole and 1-benzyl-2-ethylimidazole.
[0017]
In the present invention, these imidazoles may be used alone or in combination of two or more.
[0018]
Moreover, the addition amount of imidazoles as an adhesion enhancer is 0.05 to 20 parts by weight, preferably 0.5 to 100 parts by weight with respect to 100 parts by weight of the basic composition composed of the alkali-soluble novolac resin and the quinonediazide group-containing compound. It is selected in the range of 10 parts by weight. If this amount is less than 0.05 parts by weight, a sufficient adhesion improving effect cannot be obtained, and if it exceeds 20 parts by weight, the effect of improving the adhesion cannot be obtained for the amount, and the sensitivity also decreases, which is not preferable. .
[0019]
The ratio of the alkali-soluble novolak resin and the quinonediazide group-containing compound in the basic composition in the composition of the present invention is in the range of 5 to 40 parts by weight, preferably 10 to 30 parts by weight, with respect to 100 parts by weight of the former. Is within.
[0020]
The composition of the present invention further has compatibility additives, for example, resins for improving the performance of resist films, plasticizers, stabilizers, surfactants, and visibility of resist patterns after development. Conventional components such as a dye for improving the sensitization and a sensitizer for improving the sensitization effect can be added and contained.
[0021]
The composition of the present invention is used in the form of a solution in which an alkali-soluble novolac resin, a quinonediazide group-containing compound, certain imidazoles, and various additive components used as desired are dissolved in an appropriate solvent.
[0022]
Solvents include ketones such as 2-heptanone, acetone, methyl ethyl ketone, 1,1,1-trimethylacetone, ethylene glycol monoacetate, propylene glycol monoacetate, diethylene glycol or diethylene glycol monoacetate monomethyl ether, monoethyl ether, monopropyl Polyhydric alcohols such as ether, monobutyl ether or monophenyl ether and derivatives thereof, cyclic ethers such as dioxane, ethyl lactate, methyl acetate, ethyl acetate, butyl acetate, methyl propionate, ethyl pyruvate, 3 -Esters such as methyl methoxypropionate and methyl 3-ethoxypropionate. These solvents may be used alone or in combination of two or more. The amount of use is not particularly limited as long as it is possible to apply a coating film that is uniform and does not have pinholes or uneven coating on the substrate. Usually, the solvent amount is adjusted to 50 to 97% by weight with respect to the total resist.
[0023]
An example of a preferred method of using the composition of the present invention is shown below.
[0024]
First, a positive photoresist solution containing the above components is applied onto a substrate with a spinner and dried to form a photoresist layer. A low-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, an arc lamp, a xenon lamp, or the like is used to expose the ultraviolet rays through a predetermined mask pattern.
[0025]
Next, when this is immersed in a weak alkaline aqueous solution such as a 1 to 10% by weight tetramethylammonium hydroxide aqueous solution, the exposed portion is selectively dissolved and removed, and a resist pattern faithful to the mask pattern. Can be formed on the substrate. Next, the substrate exposed using the obtained resist pattern as a mask is etched by a known method, and then the resist pattern is peeled to form a circuit pattern on the substrate.
[0026]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.
[0027]
Example 1
Using a mixture of m-cresol and p-cresol at a weight ratio of 4: 6, 100 g of a cresol novolac resin (weight average molecular weight of 5,000) produced by a conventional method, and 2,3,4,4′- A positive type photoresist solution prepared by dissolving 20 g of naphthoquinone-1,2-diazide-5-sulfonic acid ester of tetrahydroxybenzophenone and 6 g of 1-vinylimidazole in 500 g of ethylene glycol monoethyl ether acetate is used as a silicon nitride film. Is applied on a glass substrate with a spinner coating so as to have a film thickness of 1.5 μm, and then baked on a hot plate at 110 degrees × 120 seconds, and contact exposure apparatus PLA-500F is passed through a test pattern mask. (Canon) was used for exposure.
[0028]
Next, the exposed portion was removed by immersing in an aqueous 2.38 wt% tetramethylammonium hydroxide solution for 60 seconds to form a resist pattern on the silicon nitride film, and then 130 degrees × 30 minutes in a convection oven. The silicon nitride film was etched by being baked and immersed in high-purity buffered hydrofluoric acid (manufactured by Hashimoto Kasei Co., Ltd.) for 20 minutes using the exposed silicon nitride film as a mask. Next, in order to evaluate the adhesion between the resist pattern and the silicon nitride film, the amount of biting of the silicon nitride film by etching with a 10 μm pattern was observed with an optical microscope. As a result, the amount of biting was 1 μm, and good adhesion was obtained. confirmed.
[0029]
Example 2
The silicon nitride film was etched in the same manner as in Example 1 except that 1-vinylimidazole in Example 1 was replaced with 1-benzyl-2-methylimidazole, and then the adhesion between the resist pattern and the silicon nitride film was improved. As a result of evaluation, the amount of biting was 1 μm, and good adhesion was confirmed.
[0030]
Comparative Example 1
Except that 1-vinylimidazole of Example 1 was not blended, the silicon nitride film was etched in the same manner as in Example 1, and then the adhesion between the resist pattern and the silicon nitride film was evaluated. It was 3 μm.
[0031]
Comparative Example 2
The silicon nitride film was etched in the same manner as in Example 1 except that 1-vinylimidazole in Example 1 was replaced with benzimidazole, and then the adhesion between the resist pattern and the silicon nitride film was evaluated. Was 1 μm, and good adhesion was confirmed. However, the resist color changed from normal reddish brown to dark reddish brown one day after addition of benzimidazole, and alteration of the resist was clearly observed.
[0032]
【The invention's effect】
According to the composition of the present invention, it is possible to form a resist pattern having excellent adhesion to a substrate in the manufacture of semiconductor devices and LCDs without impairing the storage stability of the resist.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04458796A JP3722538B2 (en) | 1996-03-01 | 1996-03-01 | Positive photoresist composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04458796A JP3722538B2 (en) | 1996-03-01 | 1996-03-01 | Positive photoresist composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09236923A JPH09236923A (en) | 1997-09-09 |
| JP3722538B2 true JP3722538B2 (en) | 2005-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04458796A Expired - Fee Related JP3722538B2 (en) | 1996-03-01 | 1996-03-01 | Positive photoresist composition |
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| JP (1) | JP3722538B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3705332B2 (en) | 1999-01-11 | 2005-10-12 | 信越化学工業株式会社 | Photosensitive resin composition and method for producing the same |
| JP3937996B2 (en) * | 2002-10-08 | 2007-06-27 | Jsr株式会社 | Radiation sensitive resin composition |
| JP4081677B2 (en) * | 2003-05-21 | 2008-04-30 | 信越化学工業株式会社 | Resist material and pattern forming method |
| JP6042223B2 (en) * | 2013-02-12 | 2016-12-14 | ローム・アンド・ハース電子材料株式会社 | Negative radiation sensitive resin composition |
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| Publication number | Publication date |
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| JPH09236923A (en) | 1997-09-09 |
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