EP4045564A1 - Photosensitive compositions and applications thereof - Google Patents
Photosensitive compositions and applications thereofInfo
- Publication number
- EP4045564A1 EP4045564A1 EP19798796.9A EP19798796A EP4045564A1 EP 4045564 A1 EP4045564 A1 EP 4045564A1 EP 19798796 A EP19798796 A EP 19798796A EP 4045564 A1 EP4045564 A1 EP 4045564A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bis
- diyl
- group
- photosensitive composition
- diphenol
- 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.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 163
- 229920000642 polymer Polymers 0.000 claims abstract description 87
- 230000005693 optoelectronics Effects 0.000 claims abstract description 15
- 238000004377 microelectronic Methods 0.000 claims abstract description 12
- 150000002989 phenols Chemical class 0.000 claims abstract description 11
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims description 56
- 238000000034 method Methods 0.000 claims description 41
- 239000004065 semiconductor Substances 0.000 claims description 41
- -1 methoxy, ethoxy Chemical group 0.000 claims description 38
- 239000000178 monomer Substances 0.000 claims description 34
- 239000000853 adhesive Substances 0.000 claims description 26
- 230000001070 adhesive effect Effects 0.000 claims description 26
- 229910052739 hydrogen Inorganic materials 0.000 claims description 22
- 239000001257 hydrogen Substances 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 21
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 20
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 claims description 20
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 19
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 11
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 10
- 125000001424 substituent group Chemical group 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 8
- 125000006552 (C3-C8) cycloalkyl group Chemical group 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- 125000003118 aryl group Chemical group 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 125000000041 C6-C10 aryl group Chemical group 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 6
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 6
- XKZQKPRCPNGNFR-UHFFFAOYSA-N 2-(3-hydroxyphenyl)phenol Chemical compound OC1=CC=CC(C=2C(=CC=CC=2)O)=C1 XKZQKPRCPNGNFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 5
- 229920001897 terpolymer Polymers 0.000 claims description 5
- 125000006529 (C3-C6) alkyl group Chemical group 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 125000002837 carbocyclic group Chemical group 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 4
- 238000004528 spin coating Methods 0.000 claims description 4
- MQCPOLNSJCWPGT-UHFFFAOYSA-N 2,2'-Bisphenol F Chemical compound OC1=CC=CC=C1CC1=CC=CC=C1O MQCPOLNSJCWPGT-UHFFFAOYSA-N 0.000 claims description 3
- ZXTQJQSAZLDMOG-UHFFFAOYSA-N 2-[2-(2-hydroxyphenyl)-4-methylpentan-2-yl]phenol Chemical compound C=1C=CC=C(O)C=1C(C)(CC(C)C)C1=CC=CC=C1O ZXTQJQSAZLDMOG-UHFFFAOYSA-N 0.000 claims description 3
- KYOZIVFRHLSSKN-UHFFFAOYSA-N 2-[[2-hydroxy-3-[(2-hydroxy-5-methylphenyl)methyl]-5-methylphenyl]methyl]-6-[(2-hydroxy-5-methylphenyl)methyl]-4-methylphenol Chemical compound CC1=CC=C(O)C(CC=2C(=C(CC=3C(=C(CC=4C(=CC=C(C)C=4)O)C=C(C)C=3)O)C=C(C)C=2)O)=C1 KYOZIVFRHLSSKN-UHFFFAOYSA-N 0.000 claims description 3
- YMQUTLSKDCOLJO-UHFFFAOYSA-N 4-(5-bicyclo[2.2.1]hept-2-enyl)-1,1,1-trifluoro-2-(trifluoromethyl)butan-2-ol Chemical compound C1C2C(CCC(O)(C(F)(F)F)C(F)(F)F)CC1C=C2 YMQUTLSKDCOLJO-UHFFFAOYSA-N 0.000 claims description 3
- VHLLJTHDWPAQEM-UHFFFAOYSA-N 4-[2-(4-hydroxyphenyl)-4-methylpentan-2-yl]phenol Chemical compound C=1C=C(O)C=CC=1C(C)(CC(C)C)C1=CC=C(O)C=C1 VHLLJTHDWPAQEM-UHFFFAOYSA-N 0.000 claims description 3
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 3
- 125000003545 alkoxy group Chemical group 0.000 claims description 3
- FYGUSUBEMUKACF-UHFFFAOYSA-N bicyclo[2.2.1]hept-2-ene-5-carboxylic acid Chemical compound C1C2C(C(=O)O)CC1C=C2 FYGUSUBEMUKACF-UHFFFAOYSA-N 0.000 claims description 3
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 3
- ZILRSGXFDURMQD-UHFFFAOYSA-N ethyl 3-(3-bicyclo[2.2.1]hept-2-enyl)propanoate Chemical compound C1CC2C(CCC(=O)OCC)=CC1C2 ZILRSGXFDURMQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000004014 plasticizer Substances 0.000 claims description 3
- 125000006625 (C3-C8) cycloalkyloxy group Chemical group 0.000 claims description 2
- HCNHNBLSNVSJTJ-UHFFFAOYSA-N 1,1-Bis(4-hydroxyphenyl)ethane Chemical compound C=1C=C(O)C=CC=1C(C)C1=CC=C(O)C=C1 HCNHNBLSNVSJTJ-UHFFFAOYSA-N 0.000 claims description 2
- YKPAABNCNAGAAJ-UHFFFAOYSA-N 1,1-Bis(4-hydroxyphenyl)propane Chemical compound C=1C=C(O)C=CC=1C(CC)C1=CC=C(O)C=C1 YKPAABNCNAGAAJ-UHFFFAOYSA-N 0.000 claims description 2
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 claims description 2
- MQXNNWDXHFBFEB-UHFFFAOYSA-N 2,2-bis(2-hydroxyphenyl)propane Chemical compound C=1C=CC=C(O)C=1C(C)(C)C1=CC=CC=C1O MQXNNWDXHFBFEB-UHFFFAOYSA-N 0.000 claims description 2
- SZAQZZKNQILGPU-UHFFFAOYSA-N 2-[1-(2-hydroxy-3,5-dimethylphenyl)-2-methylpropyl]-4,6-dimethylphenol Chemical compound C=1C(C)=CC(C)=C(O)C=1C(C(C)C)C1=CC(C)=CC(C)=C1O SZAQZZKNQILGPU-UHFFFAOYSA-N 0.000 claims description 2
- PEHXKUVLLWGBJS-UHFFFAOYSA-N 2-[1-(2-hydroxyphenyl)ethyl]phenol Chemical compound C=1C=CC=C(O)C=1C(C)C1=CC=CC=C1O PEHXKUVLLWGBJS-UHFFFAOYSA-N 0.000 claims description 2
- XFFRLBIFECQWAK-UHFFFAOYSA-N 2-[3-(2-hydroxyphenyl)-5-methylheptan-3-yl]phenol Chemical compound CCC(C)CC(CC)(c1ccccc1O)c1ccccc1O XFFRLBIFECQWAK-UHFFFAOYSA-N 0.000 claims description 2
- PLDLPVSQYMQDBL-UHFFFAOYSA-N 2-[[3-(oxiran-2-ylmethoxy)-2,2-bis(oxiran-2-ylmethoxymethyl)propoxy]methyl]oxirane Chemical compound C1OC1COCC(COCC1OC1)(COCC1OC1)COCC1CO1 PLDLPVSQYMQDBL-UHFFFAOYSA-N 0.000 claims description 2
- DNCLEPRFPJLBTQ-UHFFFAOYSA-N 2-cyclohexyl-4-[1-(3-cyclohexyl-4-hydroxyphenyl)cyclohexyl]phenol Chemical compound OC1=CC=C(C2(CCCCC2)C=2C=C(C(O)=CC=2)C2CCCCC2)C=C1C1CCCCC1 DNCLEPRFPJLBTQ-UHFFFAOYSA-N 0.000 claims description 2
- WKVWOPDUENJKAR-UHFFFAOYSA-N 2-cyclohexyl-4-[2-(3-cyclohexyl-4-hydroxyphenyl)propan-2-yl]phenol Chemical compound C=1C=C(O)C(C2CCCCC2)=CC=1C(C)(C)C(C=1)=CC=C(O)C=1C1CCCCC1 WKVWOPDUENJKAR-UHFFFAOYSA-N 0.000 claims description 2
- QORHYRFLCRYHBT-UHFFFAOYSA-N 2-cyclohexyl-4-[2-(4-hydroxyphenyl)propan-2-yl]-5-methylphenol Chemical compound CC1=CC(O)=C(C2CCCCC2)C=C1C(C)(C)C1=CC=C(O)C=C1 QORHYRFLCRYHBT-UHFFFAOYSA-N 0.000 claims description 2
- SRGATTGYDONWOU-UHFFFAOYSA-N 2-cyclohexyl-5-methylphenol Chemical compound OC1=CC(C)=CC=C1C1CCCCC1 SRGATTGYDONWOU-UHFFFAOYSA-N 0.000 claims description 2
- CSOQDRZGMGKOGN-UHFFFAOYSA-N 2-tert-butyl-4-[1-(5-tert-butyl-4-hydroxy-2-methylphenyl)-2-methylpropyl]-5-methylphenol Chemical compound C=1C(C(C)(C)C)=C(O)C=C(C)C=1C(C(C)C)C1=CC(C(C)(C)C)=C(O)C=C1C CSOQDRZGMGKOGN-UHFFFAOYSA-N 0.000 claims description 2
- IPHDZYSMEITSBA-UHFFFAOYSA-N 4-[1-(4-hydroxyphenyl)-4-methylcyclohexyl]phenol Chemical compound C1CC(C)CCC1(C=1C=CC(O)=CC=1)C1=CC=C(O)C=C1 IPHDZYSMEITSBA-UHFFFAOYSA-N 0.000 claims description 2
- UUEBUVJMRUPJTI-UHFFFAOYSA-N 4-[3-(4-hydroxyphenyl)-5-methylheptan-3-yl]phenol Chemical compound C=1C=C(O)C=CC=1C(CC)(CC(C)CC)C1=CC=C(O)C=C1 UUEBUVJMRUPJTI-UHFFFAOYSA-N 0.000 claims description 2
- ZSGZCVBOKLXAEF-UHFFFAOYSA-N 5-(5-bicyclo[2.2.1]hept-2-enyl)-1,1,1-trifluoro-2-(trifluoromethyl)pentan-2-ol Chemical compound C1C2C(CCCC(O)(C(F)(F)F)C(F)(F)F)CC1C=C2 ZSGZCVBOKLXAEF-UHFFFAOYSA-N 0.000 claims description 2
- SFZOHLOCNWQROV-UHFFFAOYSA-N O1C(C1)COCC1=C(C=C(C(=C1)COCC1OC1)COCC1OC1)COCC1OC1 Chemical compound O1C(C1)COCC1=C(C=C(C(=C1)COCC1OC1)COCC1OC1)COCC1OC1 SFZOHLOCNWQROV-UHFFFAOYSA-N 0.000 claims description 2
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 2
- 125000002947 alkylene group Chemical group 0.000 claims description 2
- 125000002102 aryl alkyloxo group Chemical group 0.000 claims description 2
- 125000004104 aryloxy group Chemical group 0.000 claims description 2
- LLEMOWNGBBNAJR-UHFFFAOYSA-N biphenyl-2-ol Chemical compound OC1=CC=CC=C1C1=CC=CC=C1 LLEMOWNGBBNAJR-UHFFFAOYSA-N 0.000 claims 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 claims description 2
- 239000003063 flame retardant Substances 0.000 claims description 2
- 235000010292 orthophenyl phenol Nutrition 0.000 claims description 2
- 238000000059 patterning Methods 0.000 claims description 2
- FBBATURSCRIBHN-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyldisulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSCCC[Si](OCC)(OCC)OCC FBBATURSCRIBHN-UHFFFAOYSA-N 0.000 claims description 2
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 claims description 2
- 150000002431 hydrogen Chemical group 0.000 claims 4
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 claims 3
- IWDCLRJOBJJRNH-UHFFFAOYSA-N p-cresol Chemical compound CC1=CC=C(O)C=C1 IWDCLRJOBJJRNH-UHFFFAOYSA-N 0.000 claims 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims 1
- PDFIIHNUDFWDNM-UHFFFAOYSA-N 2-[1-(2-hydroxyphenyl)propyl]phenol Chemical compound C=1C=CC=C(O)C=1C(CC)C1=CC=CC=C1O PDFIIHNUDFWDNM-UHFFFAOYSA-N 0.000 claims 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims 1
- 230000003078 antioxidant effect Effects 0.000 claims 1
- GFKCWAROGHMSTC-UHFFFAOYSA-N trimethoxy(6-trimethoxysilylhexyl)silane Chemical compound CO[Si](OC)(OC)CCCCCC[Si](OC)(OC)OC GFKCWAROGHMSTC-UHFFFAOYSA-N 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 25
- 230000000712 assembly Effects 0.000 abstract description 6
- 238000000429 assembly Methods 0.000 abstract description 6
- 229920000636 poly(norbornene) polymer Polymers 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 50
- 239000010410 layer Substances 0.000 description 48
- 239000000463 material Substances 0.000 description 28
- 230000008569 process Effects 0.000 description 23
- 238000001723 curing Methods 0.000 description 20
- 239000012790 adhesive layer Substances 0.000 description 18
- 230000014509 gene expression Effects 0.000 description 16
- 230000035882 stress Effects 0.000 description 15
- 238000007373 indentation Methods 0.000 description 12
- 239000000047 product Substances 0.000 description 11
- 239000000872 buffer Substances 0.000 description 9
- 238000004090 dissolution Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 9
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- 125000000217 alkyl group Chemical group 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 7
- 125000001183 hydrocarbyl group Chemical group 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 7
- 235000012431 wafers Nutrition 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005530 etching Methods 0.000 description 6
- 238000009472 formulation Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004642 Polyimide Substances 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 238000004380 ashing Methods 0.000 description 4
- UMIVXZPTRXBADB-UHFFFAOYSA-N benzocyclobutene Chemical compound C1=CC=C2CCC2=C1 UMIVXZPTRXBADB-UHFFFAOYSA-N 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 4
- 229920000620 organic polymer Polymers 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 229920002577 polybenzoxazole Polymers 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 4
- UJAWGGOCYUPCPS-UHFFFAOYSA-N 4-(2-phenylpropan-2-yl)-n-[4-(2-phenylpropan-2-yl)phenyl]aniline Chemical compound C=1C=C(NC=2C=CC(=CC=2)C(C)(C)C=2C=CC=CC=2)C=CC=1C(C)(C)C1=CC=CC=C1 UJAWGGOCYUPCPS-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 125000002252 acyl group Chemical group 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 230000032798 delamination Effects 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000000873 masking effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 125000001624 naphthyl group Chemical group 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- JFNLZVQOOSMTJK-KNVOCYPGSA-N norbornene Chemical compound C1[C@@H]2CC[C@H]1C=C2 JFNLZVQOOSMTJK-KNVOCYPGSA-N 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 239000002952 polymeric resin Substances 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 3
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 description 2
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 description 2
- BRRSNXCXLSVPFC-UHFFFAOYSA-N 2,3,4-Trihydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C(O)=C1O BRRSNXCXLSVPFC-UHFFFAOYSA-N 0.000 description 2
- IBHWREHFNDMRPR-UHFFFAOYSA-N 2,4,6-Trihydroxybenzoic acid Chemical compound OC(=O)C1=C(O)C=C(O)C=C1O IBHWREHFNDMRPR-UHFFFAOYSA-N 0.000 description 2
- NXXYKOUNUYWIHA-UHFFFAOYSA-N 2,6-Dimethylphenol Chemical compound CC1=CC=CC(C)=C1O NXXYKOUNUYWIHA-UHFFFAOYSA-N 0.000 description 2
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 description 2
- 125000003504 2-oxazolinyl group Chemical group O1C(=NCC1)* 0.000 description 2
- 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 2
- VGMJYYDKPUPTID-UHFFFAOYSA-N 4-ethylbenzene-1,3-diol Chemical compound CCC1=CC=C(O)C=C1O VGMJYYDKPUPTID-UHFFFAOYSA-N 0.000 description 2
- DWMJRSPNFCPIQN-UHFFFAOYSA-N 5-(3-carboxy-4-hydroxyphenyl)sulfanyl-2-hydroxybenzoic acid Chemical compound C1=C(O)C(C(=O)O)=CC(SC=2C=C(C(O)=CC=2)C(O)=O)=C1 DWMJRSPNFCPIQN-UHFFFAOYSA-N 0.000 description 2
- JWQFKVGACKJIAV-UHFFFAOYSA-N 5-[(3-carboxy-4-hydroxyphenyl)methyl]-2-hydroxybenzoic acid Chemical compound C1=C(O)C(C(=O)O)=CC(CC=2C=C(C(O)=CC=2)C(O)=O)=C1 JWQFKVGACKJIAV-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229920003319 Araldite® Polymers 0.000 description 2
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Classifications
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- G03F7/004—Photosensitive materials
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08G61/08—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms prepared by ring-opening of carbocyclic compounds of carbocyclic compounds containing one or more carbon-to-carbon double bonds in the ring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
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Definitions
- Embodiments in accordance with the present invention relate generally to polynorbomene (PNB) compositions, which contain a wide variety of additives that are useful for forming microelectronic and/or optoelectronic devices and assemblies thereof, and more specifically to compositions encompassing PNBs with at least one of norbomene-type repeating unit which contains a polyether functionalized end group, where such compositions exhibit improved thermal, mechanical and opto-electronic properties.
- PNB polynorbomene
- Organic polymer materials are increasingly being used in the microelectronics and optoelectronics industries for a variety of applications.
- the uses for such organic polymer materials include interlevel dielectrics, redistribution layers, stress buffer layers, leveling or planarization layers, alpha-particle barriers, and passivation layers for microelectronic and optoelectronic devices.
- organic polymer materials are photosensitive, thus self-imageable, and therefore, offer additional advantage of reducing the number of processing steps required for the use of such layers and structures made therefrom.
- organic polymer materials enable the direct adhesive bonding of devices and device components to form various structures.
- Such devices include microelectromechanical systems (MEMS) and microoptoelectromechanical systems (MOEMS).
- FIGs. 1A to 1D show photolithographic images formed from a composition of this invention at various exposure doses.
- FIG. 2 shows die shear strength of a composition of this invention which is compared with a comparative composition.
- Embodiments in accordance with the present invention are directed to self- imageable compositions that encompass norbornene-type polymers and the films, layers, structures, devices or assemblies that can be formed using such compositions.
- Some of such embodiments encompass self-imageable compositions which can provide positive- tone images, after image-wise exposure of a film formed thereof, followed by develo ⁇ ment of such images, using an aqueous base developer solution.
- the embodiments as described fully herein can routinely provide films of desirable thickness in the range of about 2 to 5 microns ( ⁇ m) or greater and images demonstrating aspect ratios in excess of 1 :2 for isolated line/trench resolution in such films.
- the films, layers, and structures formed from the polymer embodiments of the present invention being useful for, among other things, interlevel dielectrics, redistribution layers, stress buffer layers, leveling or planarization layers, alpha-particle barriers for both microelectronic and optoelectronic devices and the assemblies formed thereof, as well as adhesive bonding to form chip-stacks and to fixably attach transparent covers over image sensing arrays.
- microelectronic device is inclusive of a “micro-optoelectronic device” and an “optoelectronic device”.
- microelectronic devices or a microelectronic device assemblies are inclusive of optoelectronic devices and micro-optoelectronic devices as well as assemblies thereof.
- microelectromechanical systems include microoptoelectro- mechanical systems (MOEMS).
- RDL distributed layer
- polymer will be understood to mean a molecule that encompasses a backbone of one or more distinct types of repeating units (the smallest constitutional unit of the polymer) and is inclusive of, in addition to the polymer itself, residues from initiators, catalysts, and other elements attendant to the forming of such a polymer, where such residues are generally understood as not being covalently incorporated thereto, but maybe covalently bound to the front or back end of the polymeric chain as in certain catalyst initiated polymerization. Further, such residues and other elements, while normally removed during post polymerization purification processes, are typically mixed or co-mingled with the polymer such that some small amount generally remains with the polymer when it is transferred between vessels or between solvents or dispersion media.
- polymer composition is meant to include at least one synthesized polymer, as well as materials added after the forming of the polymer(s) to provide or modify specific properties of such composition.
- materials that can be added include, but are not limited to, solvents, photoactive compounds (PAC), dissolution rate inhibitors, dissolution rate enhancers, dissolution promoters, crosslinking moieties, reactive diluents, antioxidants, adhesion promoters, and plasticizers.
- modulus is understood to mean the ratio of stress to strain and unless otherwise indicated, refers to the Young's Modulus or Tensile Modulus measured in the linear elastic region of the stress-strain curve. Modulus values are generally measured in accordance with ASTM method DI708-95. Films having a low modulus are understood to also have low internal stress.
- photodeflnable refers to the characteristic of a material or composition of materials, such as a polymer or polymer composition in accordance with embodiments of the present invention, to be formed into, in and of itself, a patterned layer or a structure.
- a “photodeflnable layer” does not require the use of another material layer formed thereover, for example, a photoresist layer, to form the aforementioned patterned layer or structure.
- a polymer composition having such a characteristic is generally employed in a pattern forming scheme to form a patterned film/layer or structure. It will be noted that such a scheme incorporates an “imagewise exposure” of the photodeflnable material or layer formed therefrom.
- Such imagewise exposure being taken to mean an exposure to actinic radiation of selected portions of the layer, where non-selected portions are protected from such exposure to actinic radiation.
- self-imageable compositions will be understood to mean a material that is photodefinable and can thus provide patterned layers and/or structures after direct image-wise exposure of a film formed thereof followed by develo ⁇ ment of such images in the film using an appropriate developer.
- hydrocarbyl refers to a radical or a group that contains only carbon and hydrogen atoms, non-limiting examples being alkyl, cycloalkyl, aryl, aralkyl, alkaryl, and alkenyl.
- halohydrocarbyl refers to a hydrocarbyl group where at least one hydrogen atom has been replaced by a halogen atom.
- perhalocarbyl refers to a hydrocarbyl group where all hydrogens have been replaced by halogens.
- heterohydrocarbyl refers to any of the previously described hydrocarbyls, halohydrocarbyls, and perhalohydrocarbyls where at least one carbon atom of the carbon chain is replaced with an N, O, S, Si or P atom.
- the symbol denotes a position at which the bonding takes place with another repeat unit or another atom or molecule or group or moiety as appropriate with the structure of the group as shown.
- alkyl means a saturated, straight-chain or branched- chain hydrocarbon substituent having the specified number of carbon atoms. Particular alkyl groups are methyl, ethyl, n-propyl, isopropyl, tert-butyl, and so on. Derived expressions such as “alkoxy”, “thioalkyl”, “alkoxyalkyl”, “hydroxyalkyl”, “alkylcarbonyl”, “alkoxycarbonylalkyl”, “alkoxycarbonyl”, “diphenylalkyl”, “phenylalkyl”, “phenylcarboxyalkyl” and “phenoxyalkyl” are to be construed accordingly.
- cycloalkyl includes all of the known cyclic aliphatic radicals.
- Representative examples of “cycloalkyl” includes without any limitation cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, and the like.
- Derived expressions such as “cycloalkoxy”, “cycloalkylalkyl”, “cycloalkylaryl”, “cycloalkylcarbonyl” are to be construed accordingly.
- alkenyl means a non-cyclic, straight or branched hydrocarbon chain having the specified number of carbon atoms and containing at least one carbon-carbon double bond, and includes ethenyl and straight-chained or branched propenyl, butenyl, pentenyl and hexenyl groups.
- alkynyl means a non-cyclic, straight or branched hydrocarbon chain having the specified number of carbon atoms and containing at least one carbon-carbon triple bond, and includes ethynyl and propynyl, and straight-chained or branched butynyl, pentynyl and hexynyl groups.
- acyl shall have the same meaning as “alkanoyl”, which can also be represented structurally as “R-CO-,” where R is an “alkyl” as defined herein having the specified number of carbon atoms. Additionally, “alkylcarbonyl” shall mean same as acyl as defined herein. Specifically, “(C 1 -C 4 )acyl” shall mean formyl, acetyl or ethanoyl, propanoyl, n-butanoyl, etc. Derived expressions such as “acyloxy” and “acyloxyalkyl” are to be construed accordingly.
- perfluoroalkyl means that all of the hydrogen atoms in said alkyl group are replaced with fluorine atoms.
- Illustrative examples include trifluoromethyl and pentafluoroethyl, and straight-chained or branched heptafluoropropyl, nonafluorobutyl, undecafluoropentyl and tridecafluorohexyl groups.
- perfluoroalkoxy is to be construed accordingly.
- aryl means substituted or unsubstituted phenyl or naphthyl.
- substituted phenyl or naphthyl include o-, p-, m-tolyl, 1,2-, 1,3- , 1,4-xylyl, 1-methylnaphthyl, 2-methylnaphthyl, etc.
- Substituted phenyl or “substituted naphthyl” also include any of the possible substituents as further defined herein or one known in the art. Derived expression, “arylsulfonyl,” is to be construed accordingly.
- arylalkyl or “aralkyl” are used interchangeably herein, and specifically "(C 6 -C 10 )aryl(C 1 -C 4 )alkyl” or “(C 7 -C 14 )aralkyl” means that the (C 6 -C 10 )aryl as defined herein is further attached to (C 1 -C 4 )alkyl as defined herein.
- Representative examples include benzyl, phenylethyl, 2-phenylpropyl, 1-naphthylmethyl, 2-naphthylmethyl, and the like.
- heteroaryl includes all of the known heteroatom containing aromatic radicals.
- Representative 5-membered heteroaryl radicals include furanyl, thienyl or thiophenyl, pyrrolyl, isopyrrolyl, pyrazolyl, imidazolyl, oxazolyl, thiazolyl, isothiazolyl, and the like.
- Representative 6-membered heteroaryl radicals include pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazinyl, and the like radicals.
- bicyclic heteroaryl radicals include, benzofuranyl, benzothiophenyl, indolyl, quinolinyl, isoquinolinyl, cinnolyl, benzimidazolyl, indazolyl, pyridofuranyl, pyridothienyl, and the like radicals.
- heterocycle includes all of the known reduced heteroatom containing cyclic radicals.
- Representative 5-membered heterocycle radicals include tetrahydrofuranyl, tetrahydrothiophenyl, pyrrolidinyl, 2-thiazolinyl, tetrahydrothiazolyl, tetrahydrooxazolyl, and the like.
- Representative 6-membered heterocycle radicals include piperidinyl, piperazinyl, morpholinyl, thiomorpholinyl, and the like.
- Various other heterocycle radicals include, without limitation, aziridinyl, azepanyl, diazepanyl, diazabicyclo[2.2.1]hept-2- yl, and triazocanyl, and the like.
- Halogen or “halo” means chloro, fluoro, bromo, and iodo.
- substituted is contemplated to include all permissible substituents of organic compounds.
- substituted means substituted with one or more substituents independently selected from the group consisting of (C 1 -C 6 )alkyl, (C 2 -C 6 )alkenyl, (C 1 -C 6 )perfluoroalkyl, phenyl, hydroxy, -CO 2 H, an ester, an amide, (C 1 -C 6 )alkoxy, (C 1 -C 6 )thioalkyl, (C 1 -C 6 )perfluoroalkoxy, -NH 2 , Cl, Br, I, F, -NH-lower alkyl, and -N(lower alkyl) 2 .
- any of substituents independently selected from the group consisting of (C 1 -C 6 )alkyl, (C 2 -C 6
- OFET Organic Field Effect Transistors
- dielectric and “insulating” are used interchangeably herein. Thus reference to an insulating material or layer is inclusive of a dielectric material or layer and vice versa.
- organic electronic device will be understood to be inclusive of the term “organic semiconductor device” and the several specific implementations of such devices such as the organic field effect transistors (OFETs).
- orthogonal and “orthogonality” will be understood to mean chemical orthogonality.
- an orthogonal solvent means a solvent which, when used in the deposition of a layer of a material dissolved therein on a previously deposited layer, does not dissolve or swell said previously deposited layer.
- polycycloolefin As used herein, the terms “polycycloolefin”, “poly(cyclic) olefin”, and “polynorbornene-type” are interchangeably used to refer to polymers formed from addition polymerizable monomers, the repeating units in the resulting polymers or the compositions that encompass such polymers, where repeating units of such resulting polymers encompass at least one norbornene-type moiety.
- the simplest norbornene-type polymerizable monomer encompassed by embodiments in accordance with the present invention is norbornene itself, bicyclo[2.2.1]hept-2-ene, as shown below:
- norbornene-type monomer, norbornene-type repeating unit or norbornene-type polymer is not limited to such moieties that encompass only norbornene itself, but rather to any substituted norbornene(s), or substituted and unsubstituted higher cyclic derivatives thereof.
- a photosensitive composition comprising: a) a polymer having a first type of repeating unit of formula (IA) derived from a monomer of formula (I): a second type of repeating unit of formula (I1A) derived from a monomer of formula (II): a third type of repeating unit of formula (IIIA) derived from a monomer of formula represents a position at which the bonding takes place with another repeat unit; a is an integer from 0 to 3 inclusive; b is an integer from 1 to 4 inclusive; c is an integer from 1 to 4 inclusive;
- Ri is selected from the group consisting of hydrogen, methyl, ethyl, n-propyl, i-propyl and n-butyl, wherein one or more of the methylene group, i.e., CH 2 group may optionally be substituted independently with a group selected from the group consisting of (C 1 -C 4 )alkyl, phenyl and phenyl(C 1 -C 4 )alkyl; Ris is selected from -(CH 2 ) S -, -(CH 2 )t-OCH 2 - or -(CH 2 )r(OCH 2 CH 2 )u-OCH 2 -, where s is an integer from 0 to 6, t is an integer from 0 to 4; u is an integer from 0 to 3;
- Ri 9 is -(CH 2 ) v -CO 2 R 20 where v is an integer from 0 to 4, and R 20 is hydrogen or C 1 -C 4 alkyl; b) a photo active compound containing a diazo-quinone moiety of formula (A): c) a multifunctional crosslinking agent selected from the group consisting of: a compound of the formula (IV): a compound of the formula (V): wherein: n is an integer from 5 to 8;
- A is selected from the group consisting of C, CH-(CR 2 ) d -CH and substituted or unsubstituted aryl, where d is an integer from 0 to 4 and R is selected from the group consisting of hydrogen, methyl, ethyl, n-propyl, i-propyl and n-butyl;
- B is selected from the group consisting of substituted or unsubstituted (C 2 -C 6 )alkylene and substituted or unsubstituted aryl; wherein said substituents are selected from the group consisting of halogen, methyl, ethyl, linear or branched (C 3 -C 6 )alkyl, (C 3 -C 8 )cycloalkyl, (C 6 -C 10 )aryl, (C 7 -C 12 )aralkyl, methoxy, ethoxy, linear or branched (C 3 -C 6 )alkyloxy, (C 3 -C 8 )cycloalkyloxy, (C 6 -C 10 )aryloxy and (C 7 -C 12 )aralkyloxy; d) a phenolic compound selected from the group consisting of: wherein d and e are integers from 1 to 4; f and g are integers from 0 to 4;
- R 2 and R 3 are the same or different and independently of each other selected from hydrogen, methyl, ethyl, linear or branched C 3 -C 6 alkyl, C 3 -C 8 cycloalkyl, C 6 -C 10 aryl and C 7 -C 12 aralkyl; or
- R 2 and R 3 taken together with the carbon atom to which they are attached form a 5 to 8 membered substituted or unsubstituted carbocyclic ring where said substituents are selected from C 1 -C 8 alkyl;
- R 4 and R.5 are the same or different and independently of each other selected from hydrogen, methyl, ethyl, linear or branched (C 3 -C 6 )alkyl, (C 3 -C 8 )cycloalkyl, (C 6 -C 10 )aryl and (C 7 -C 12 )aralkyl.
- the polymer of this invention contains a repeat unit of formula (IIIA), in which R20 is generally hydrogen.
- R20 is generally hydrogen.
- some embodiments may contain a polymer having a mixture of repeat units of formula (IIIA) in which portions of the repeat units of formula (IIIA) have R20 as hydrogen and other portions of repeat units of formula (IIIA) have R20 as (C 1 -C 4 )alkyl. Accordingly, it should be understood that all such variations are part of this invention as readily appreciated by one of skill in the art.
- Non-limiting examples of monomers that can be employed to form the first repeat unit of the polymer of this invention include the following:
- NBTODD tetraoxadodecanenorbomene
- Non-limiting examples of monomers that can be employed to form the second repeat unit of the polymer of this invention include the following: norbomenyl-2-trifluoromethyl-3,3,3-trifluoropropan-2-ol (HFANB);
- NBMeCOOH 3-(bicyclo[2.2.1]hept-5-en-2-yl)acetic acid
- NBEtCOOH norbornenylpropanoic acid
- Acid NB bicyclo[2.2.1]hept-5-ene-2 -carboxylic acid
- the photosensitive composition of this invention can be made by employing a polymer derived from any three monomers listed above, which are within the scope of the monomers of formulae (I) to (III). Further any amounts of the monomers of formulae (I) to (III) can be employed to form the polymer which produces the intended benefit and for the intended purpose as further described below. Accordingly, all such conceivable monomer ratios are part of this invention.
- the photosensitive composition of this invention is made by using a terpolymer containing any of three monomers as described herein.
- polymer embodiments in accordance with the present invention encompass the above described one or more of the first, second and third distinct type of repeating units, as it will be seen below, other repeating units encompassed by such polymer embodiments are selected to provide properties to such polymer embodiments that are appropriate and desirable for the use for which such embodiments are directed, thus such polymer embodiments are tailorable to a variety of specific applications.
- polymer embodiments generally require at least one repeating unit directed to providing imageability.
- distinct types of repeating units, represented by structural formula (IIIA) can include R19 being a carboxylic acid containing pendent group.
- any of the other functional group which would result in an acidic pendent moiety can also be used instead.
- Carboxylic acid pendent groups are generally useful for participating in a reaction with appropriately selected additives, or other repeating units that can lead to fix a positive-tone image via post develop thermal crosslinking.
- similar pendent groups including but not limited to phenolic, sulfonic and other functional groups may also work in this embodiment of the invention.
- polymer compositions containing acidic pendent groups can be made post polymerization by utilizing appropriate monomers.
- a polymer containing NBEtCOOH monomer repeat units can generally be made by first forming the polymer using EPEsNB, and then hydrolyzing the ester function in the resulting polymer using any of the known procedures in the art.
- ester monomeric repeat units may always be present in the polymer employed herein. That is, when a polymer containing repeat units such as NBEtCOOH is used, such polymer may still contain some monomeric repeat units derived from EPEsNB, i.e., the starting monomer.
- each of monomers of formulae (I) to (III) can be employed in any molar ratios to form the polymer of this invention. That is, one or more monomers of monomer of formula (I) can be employed with one or more monomers of formula (II) and one or more monomers of formula (III) to form the polymers of this invention.
- the polymers of this invention generally incorporate repeating units of formula (IA) from about 1 mole percent to about 98 mole percent. The remaining repeat units are being derived from a combination of repeat units of one or more repeat units of formulae (IIA) and (IIIA).
- a terpolymer containing any combinations of monomeric repeat units of formula (IA), (IIA) and (IIIA) in which the molar ratios of the repeat units can be 40:30:30, 40:40:20, 50:20:30, 50:25:25, 50:30:20, 50:40:10, 50:45:5, 60:20:20, and the like.
- examples of such monomer molar ratio of (I):II):III) employed to form the polymer can range from 1:1:98 to 98:1:1 to 1:98:1 respectively, where the molar ratios of the repeat units of formulae (IA):(IIA):(IIIA) is essentially of the same order.
- such ratios include 30:40:30, 40:30:30, 40:40:20, 40:45:15, 40:50:10, 45:40:15, 45:35:20, 50:35:15, 50:40:10 or any such combination.
- the polymer used in the photosensitive composition of this invention contains a monomer repeat unit containing the acid pendent group from about 10 to 80 mol%, and in some other embodiments from 20 to 70 mol%.
- the molar percent of monomer repeat units of formula (IA) in the polymer may be from about 0 to 80 mol%, from about 10 to 80 mol% and in some other embodiments from about 20 to 70 mol%.
- the molar percent of monomer repeat units of formula (IIA) in the polymer may be from about 0 to 80 mol%, from about 10 to 80 mol% and in some other embodiments from about 20 to 70 mol%.
- the polymers employed in the photosensitive compositions according to this invention generally exhibit a weight average molecular weight (M w ) of at least about 5,000. In another embodiment, the polymer employed in this invention has a M w of at least about 7,000. In yet another embodiment, the polymer has a M w of at least about 500,000. Further, in an embodiment of this invention the polymer employed herein exhibits a weight average molecular weight of from 5,000 to 500,000, or from 7,000 to 200,000 or from 8,000 to 100,000.
- the weight average molecular weight (M w ) and the number average molecular weight (M n ) are generally determined by gel permeation chromatography (GPC) using polystyrene calibration standards. However, any of the other known methods can also be used to determine M w and M n . From this the polydispersity index (PDI) of the polymer can also be determined (M w /M n ).
- the photosensitive composition of this invention contains a photoactive compound which generally contains a photo active diazo-quinone moiety.
- photoactive compounds PACs
- Such photoactive compounds (PACs) are known to undergo photo-rearrangement when subjected to actinic (or electromagnetic) radiation of suitable wavelength, such as for example 254, 365, 405, or 436 nm depending upon the nature of the PAC employed the wavelength of the radiation can be modified by employing suitable light source.
- the PACs employed contain one or more of the diazo-quinone moiety represented by formula (C), (D) or (E):
- the structures of Formulae (C), (D) and/or (E) are incorporated into the photosensitive composition as an esterification product of the respective sulfonyl chloride (or other reactive moiety) and a phenolic compound, such as one of structures b-1 through b-6 shown below, each generally referred to as a photoactive compound or PAC, as discussed above.
- a photoactive compound or PAC any one, or any mixture of two or more of such PACs are combined with the polymer in forming a positive tone composition embodiment of the present invention.
- Q represents any of the structures of Formulae (C), (D) or (E).
- these esterification products when a portion of a film or a layer of the photosensitive composition is exposed to appropriate actinic or electromagnetic radiation, these esterification products generate a carboxylic acid which enhances the solubility of such exposed portion in an aqueous alkali solution as compared to any unexposed portions of such film.
- photosensitive materials are incorporated into the composition in an amount from 5 to 50 pphr polymer, where the specific ratio of the photosensitive material to polymer is a function of the dissolution rate of exposed portions as compared to unexposed portions and the amount of radiation required to achieve a desired dissolution rate differential.
- photoactive compound where at least one of Q is a group of the formula (C) or (D) and any remaining Q is hydrogen.
- An example of such photoactive compound available commercially include TrisP-3M6C-2(4)- 201 from Toyo Gosei. Any amount of photoactive compound can be employed in the photosensitive composition of this invention which brings about the desired results as described herein. Generally, such amount can range from 1 to 50 parts per hundred parts by mass (pphr) of the polymer (i.e., resin) as described herein. In some other embodiments such amount can range from 5 to 30 pphr.
- any amount of crosslinking agent of formulae (IV) or (V) can be employed in the compositions of this invention that would bring about the intended benefit.
- the amount of one or more compounds of formulae (IV) or (V) that is employed in the composition of this invention may range from about 8 to 30 parts per hundred parts of the resin (pphr), i.e., the polymer used in such composition. In some other embodiments it ranges from about 10 to 25 pphr; in some other embodiments it ranges from about 12 to 20 pphr; and yet in some other embodiments it ranges from about 14 to 18 pphr. However, it should be noted that higher than 30 pphr of compounds of formulae (IV) or (V) may also be employed especially when more than one compound of formulae (IV) or (V) are employed.
- Non-limiting examples of such multifunctional crosslinking agent of formulae (IV) or (V) that can be employed in the compositions of this invention include the following:
- crosslinking agents including the following:
- any amount of one or more of the phenolic compound of formulae a-1 to a-6 can be employed in the photosensitive composition of this invention which brings about the desired results as described herein.
- such amount can range from 1 to 25 parts per hundred parts by mass (pphr) of the polymer (i.e., resin) as described herein. In some other embodiments such amount can range from 3 to 20 pphr and in some other embodiments such amount can range from 5 to 15 pphr.
- 2,2'-methylenediphenol also referred to as 2,2’-bis(hydroxyphenyl)methane or o,o’-BPF
- any amount of one or more compound of formula (VI) can be employed in the photosensitive composition of this invention which brings about the desired results as described herein.
- amount can range from 5 to 30 parts per hundred parts by mass (pphr) of the polymer (i.e., resin) as described herein. In some other embodiments such amount can range from 7 to 20 pphr and in some other embodiments such amount can range from 9 to 15 pphr.
- the photosensitive compositions of the present invention also include additives that are advantageously capable of bonding with the pendant acidic group of the polymer resin.
- additives include, but are not limited to, additives that incorporate one or more epoxy groups such as a glycidyl group, an epoxycyclohexyl group, an oxetane group; an oxazoline group such as 2-oxazoline-2-yl group, a methylol group such as a N-hydroxy methylaminocarbonyl group or an alkoxymethyl group such as a N-methoxy methylaminocarbonyl group.
- epoxy groups such as a glycidyl group, an epoxycyclohexyl group, an oxetane group
- an oxazoline group such as 2-oxazoline-2-yl group
- a methylol group such as a N-hydroxy methylaminocarbonyl group or an alkoxymethyl group such as a N-methoxy methyl
- the aforementioned bonding with the pendant acid group of the polymer is a cross-linking reaction that is initiated by heating to an appropriate temperature, generally above 110°C for an appropriate amount of time.
- the photosensitive composition of this invention contains one or more epoxy compounds selected from the following:
- the photosensitive composition contains a compound or a mixture of compounds that are useful in enhancing the properties of the compositions, including but not limited to increasing the photo-speed and dissolution properties, among various other uses.
- a compound of formula (VII) can be used as an additive in accordance with the practice of this invention:
- R21 and R22 are the same or different and independently of each other selected from hydrogen, halogen, methyl, ethyl, linear or branched C 3 -C 18 alkyl, C 3 -C 18 perfluoroalkyl, methoxy, ethoxy, linear or branched C 3 -C 18 alkoxy, C 3 -C 16 cycloalkyl, C 3 -C 16 bicycloalkyl, C 8 -C 16 tricycloalkyl, C 6 -C 10 aryl, C 7 -C 18 aralkyl, -(CH 2 ) W CO 2 R 23 , -(CH 2 ) z OR 24 .
- An and An are the same or different and independently of each other selected from C 6 -C 10 aryl, C 7 -C 18 aralkyl, where the aryl or aralkyl groups can further be substituted with any of the possible substituents which are known to one skilled in the art.
- Z is selected from a bond, O, S,
- R 24 is hydrogen, methyl, ethyl, linear or branched C 3 -C 18 alkyl.
- R is hydrogen, methyl, ethyl, linear or branched C 3 -C 18 alkyl, C 3 -C 18 perfluoroalkyl, C 3 -C 16 cycloalkyl, C 3 -C 16 bicycloalkyl, C 3 -C 16 tricycloalkyl.
- phenolic compounds can also be used in the compositions of this invention.
- Non-limiting examples of such compounds may be selected from the group consisting of: a compound of formula wherein h is an integer from 0 to 4; i is 1 or 2;
- Re independently is hydrogen, methyl, ethyl, linear or branched C 3 -C 16 alkyl, C 3 -C 8 cycloalkyl, C 6 -C 10 aryl, C 7 -C 12 aralkyl or-CO 2 H; a compound of formula (IX): wherein j and k are integers from 1 to 4;
- 1 and m are integers from 0 to 4.
- R 7 and R 8 are the same or different and independently of each other selected from hydrogen, methyl, ethyl, linear or branched C 3 -C 6 alkyl, C 3 -C 8 cycloalkyl, C 6 -C 10 aryl andC 7 -C 12 aralkyl; and a compound of formula (X): wherein n and o are integers from 1 to 4; p and q are integers from 0 to 4;
- R. 9 , R 10 , RII and R 12 are the same or different and independently of each other selected from hydrogen, methyl, ethyl, linear or branched C 3 -C 6 alkyl; or when R 13 is -(CH 2 ) r- one of R9 or R 10 and one of R 11 or R 12 taken together with the carbon atoms to which they are attached form a 5 to 8 membered substituted or unsubstituted carbocyclic ring where said substituents are selected from C 1 -C 6 alkyl;
- R 13 is -(CH 2 ) r- or phenylene, where r is 1 to 2;
- R 14 and R 15 are the same or different and independently of each other selected from hydrogen, methyl, ethyl, linear or branched C 3 -C 6 alkyl, C 3 -C 8 cycloalkyl, C 6 -C 10 aryl and C 7 -Ci 2 aralkyl.
- Non-limiting examples of additives encompassed by a compound of formula (VIII) may be enumerated as follows:
- 4-hexylresorcinol also referred to as 4-hexylbenzene-l,3-diol
- mixtures in any combination thereof 4-hexylresorcinol
- Non-limiting examples of additives encompassed by a compound of formula (IX) may be enumerated as follows:
- Non-limiting examples of additives encompassed by a compound of formula (X) may be enumerated as follows:
- compositions of this invention may be enumerated as follows:
- the following compounds can also be used in the composition of this invention: bis(oxiran-2-ylmethyl) cyclohexane- 1 ,2-dicarboxylate; bis(oxiran-2-ylmethyl) cyclohexane- 1 ,3 -dicarboxylate; bis(oxiran-2-y lmethyl) cyclohexane- 1 ,4-dicarboxylate; bis(oxiran-2-ylmethyl) phthalate; bis(oxiran-2-ylmethyl) isophthalate; bis(oxiran-2-ylmethyl) terephthalate; and mixtures in any combination thereof.
- various compounds and additives as enumerated herein improve overall performance of the photosensitive compositions of this invention thus providing well defined photo-patterned structures having a variety of utilities, including but not limited to chip-stack applications, redistribution layers and for forming CMOS image sensor dam structures.
- certain of the additives as described herein may feature more than one function.
- some of the additives as enumerated hereinabove may not only exhibit certain dissolution enhancement activity post-exposure but may also facilitate as a cross linking agent as further described above. Therefore, additives as used herein do not limit the activity of such compounds to only one of such property but may also facilitate other functions of the photosensitive compositions of this invention.
- any of the additives noted above and represented by structural formulae (VI) to (X) can be used alone, i.e., as a single compound and/or a combination of one or more compounds in any combination thereof. That is, for example, in some embodiments one or more compounds of formula (VI) may be used in combination with any of the other compounds of formula (VII) to (X), such as for example a compound of formula (VI) in combination with a compound of formula (VII) or a compound of formula (VII) or a compound of formula (IX) a compound of formula (X), and so on.
- the amount of the additive that can be used depends upon the intended result with the photosensitive composition of this invention. Accordingly, any amount that would bring about the intended result can be used in this invention. In general, the amount of additive that can be used can range from 0.5 to 20 pphr, and in some embodiments such amounts are in the range of from 1 to 12 pphr.
- composition of this invention includes, without any limitation, the following:
- the photosensitive composition of this invention further encompasses one or more compounds having utility as, among other things, adhesion promoters, antioxidants, crosslinking, coupling or curing agent, and the like.
- Non-limiting examples of such compounds are selected from the group consisting of the following, commercially available materials are indicated by such commercial names.
- triethoxy(3-(oxiran-2-ylmethoxy)propyl)silane also commonly known as-glycidoxypropyl triethoxysilane (3-GTS or (KBE-403 from Shin-Etsu Chemical Co.
- trimethoxy(3-(oxiran-2-ylmethoxy)propyl)silane also commonly known as-glycidoxypropyl trimethoxysilane (KBM-403 from Shin-Etsu Chemical Co., Ltd.));
- Still other exemplary epoxy resins or cross-linking additives include, among others Araldite MT0163 and Araldite CY179 (manufactured by Ciba Geigy); and EHPE-3150, Epolite GT300 and (manufactured by Daicel Chemical).
- any one of these compounds can be used alone or as mixtures in any combination thereof, and only if needed depending upon the intended use and to obtain the desirable benefit.
- any amount of one or more of aforementioned compounds can be used in the photosensitive composition of this invention so as to bring about the desired results.
- amounts can range from 0.5 to 20 parts per hundred parts of the polymer resin (pphr). In some embodiments such amounts range from 1 to 10 pphr.
- Photosensitive compositions in accordance with the present invention may also encompass other components as may be useful for the purpose of improving the properties of both the composition and the resulting film or the polymer layer.
- the sensitivity of the composition to a desired wavelength of exposure radiation may result in improved desirable properties as further described below.
- optional components may include without any limitation one or more compounds/various additives such as surfactants, silane coupling agents, leveling agents, phenolic resins, antioxidants, flame retardants, plasticizers, and curing accelerators.
- the photosensitive composition embodiments are first applied to a desired substrate to form a film.
- a desired substrate includes any appropriate substrate as is, or may be used for electrical, electronic or optoelectronic devices, for example, a semiconductor substrate, a ceramic substrate, a glass substrate.
- any appropriate coating method can be employed, for example spin coating, spraying, doctor blading, meniscus coating, inkjet coating and slot coating.
- the coated substrate is heated to facilitate the removal of residual casting solvent, for example to a temperature from 70°C to 130°C for from 1 to 30 minutes, although other appropriate temperatures and times can be used.
- the film is generally imagewise exposed to an appropriate wavelength of actinic radiation, wavelength is generally selected based on the choice of the photoactive compound and/or photosensitizer incorporated into the polymer composition as described herein. However, generally such appropriate wavelength is from 200 to 700 nm. It will be understood that the phrase “imagewise exposure” means exposing through a masking element to provide for a resulting pattern of exposed and unexposed portion of the film.
- a develo ⁇ ment process is employed.
- such develo ⁇ ment process removes only exposed portions of the film thus leaving a positive image of the masking layer in the film.
- such develo ⁇ ment process removes only unexposed portions of the film thus leaving a negative image of the masking layer in the film.
- a post exposure bake can be employed prior to the aforementioned develo ⁇ ment process.
- Suitable developers can include aqueous solutions of inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, ammonia, and aqueous solutions of organic alkalis such as 0.26N tetramethylammonium hydroxide (TMAH), ethylamine, triethylamine and triethanolamine.
- TMAH tetramethylammonium hydroxide
- ethylamine ethylamine
- triethylamine triethanolamine
- Aqueous solutions of TMAH are well known developer solutions in the semiconductor industry.
- Suitable developers can also include organic solvents such as propylene glycol methyl ether acetate (PGMEA), 2-heptanone, cyclohexanone, toluene, xylene, ethyl benzene, mesitylene and butyl acetate, among others.
- organic solvents such as propylene glycol methyl ether acetate (PGMEA), 2-heptanone, cyclohexanone, toluene, xylene, ethyl benzene, mesitylene and butyl acetate, among others.
- some formulation embodiments of the present invention provide self-imageable films that after imagewise exposure, the resulting image is developed using an aqueous base solution, while for other such embodiments the resulting image is developed using an organic solvent.
- the substrate is rinsed to remove excess developer solution, typical rinse agents are water or appropriate alcohols and mixtures thereof.
- the substrate is dried and the imaged film finally cured. That is to say, the image is fixed. Where the remaining layer has not been exposed during the imagewise exposure, image fixing is generally accomplished by causing a reaction within the remaining portions of the film.
- Such reaction is generally a cross-linking reaction that can be initiated by heating and/or non-imagewise or blanket exposure of the remaining material.
- Such exposure and heating can be in separate steps or combined as is found appropriate for the specific use of the imaged film.
- the blanket exposure is generally performed using the same energy source as employed in the imagewise exposure although any appropriate energy source can be employed.
- the heating is generally carried out at a desirable temperature, for example, from above 110°C for a time of from 40 min to one or more hours.
- image fixing is generally accomplished by a heating step to be tailored to complete any reaction initiated by the exposure.
- an additional blanket exposure and heating as discussed above, can also be employed. It should be realized, however, that the choice of a final cure process is also a function of the type of device being formed; thus a final fixing of the image may not be a final cure where the remaining layer is to be used as an adhesive layer or structure.
- the devices are produced by using embodiments of the alkali soluble photosensitive resin composition of the present invention to form layers which are characterized as having high heat resistance, an appropriate water absorption rate, high transparency, and low permittivity.
- such layers generally have an advantageous coefficient of elasticity after curing, 0.1 kg/mm 2 to 200 kg/mm 2 being typical.
- exemplary applications for embodiments of the photosensitive compositions in accordance with the present invention include die attach adhesive, wafer bonding adhesive, insulation films (interlayer dielectric layers), protecting films (passivation layers), mechanical buffer films (stress buffer layers) or flattening films for a variety of semiconductor devices, and printed wiring boards.
- Specific applications of such embodiments encompass a die-attach adhesive to form a single or multilayer semiconductor device, dielectric film which is formed on a semiconductor device; a buffer coat film which is formed on the passivation film; an interlayer insulation film which is formed over a circuit formed on a semiconductor device.
- some embodiments in accordance with the present invention therefore provide a positive tone photosensitive polymer composition which exhibits enhanced characteristics with respect to one or more of mechanical properties (such as low-stress retained elongation to break after aging) and at least equivalent chemical resistance, as compared to alternate materials.
- such embodiments provide generally excellent electrical insulation, adhesion to the substrate, and the like.
- the photosensitive compositions of this invention are useful to form adhesive layers for bonding the semiconductor chips to each other, such as in chip-stack applications.
- a bonding layer used for such a purpose is composed of a cured product of the photosensitive adhesive composition of the present invention.
- the adhesive layer is a single-layer structure, it not only exhibits sufficient adhesiveness to the substrate but also is free of significant stress resulting due to the curing step. Accordingly, it is now possible to avoid undesirably thick layer of film encompassing the chip as a laminate.
- the laminates formed in accordance with the present invention are reliable in that the relaxation of stress concentration between layers caused by thermal expansion difference or the like can be obtained.
- the semiconductor device having low height and high reliability can be obtained. That is, devices with low aspect ratio and low thickness can be obtained.
- Such semiconductor device becomes particularly advantageous to electronic equi ⁇ ment, which has very small internal volume and is in use while carrying as a mobile device, for example.
- Even more advantageously, by practice of this invention it is now possible to form a variety of electronic devices featuring hitherto unachievable level of miniaturization, thinning and light-weight, and the function of the semiconductor device is not easily damaged even if such devices are subject to rugged operations such as swinging or dropping.
- a cured product of the photosensitive adhesive composition of the present invention i.e., the adhesive layer or the film generally exhibits an indentation modulus of 2 to 3.5 GPa at 25°C.
- the cured product of the photosensitive adhesive composition of the present invention exhibits an indentation modulus of 70 to 120% of the indentation modulus of the non-cured product at 25°C, i.e., before such curing step.
- the photosensitive adhesive composition of the present invention exhibits an excellent adhesiveness to a suitable substrate, such as for example a semiconductor chip, and adhesiveness of 20 to 200 Newton (N) at 25°C can be achieved before curing and generally after etching and ashing process.
- the photosensitive adhesive composition of the present invention exhibits an indentation modulus at room temperature after curing which is relatively comparable to the indentation modulus of the uncured sample and not causing significant stress concentration between the semiconductor chips but contributing to forming of the adhesive layer with sufficient adhesiveness. Further, since the indentation modulus in a state before cured is within the predetermined range of indentation modulus after cured, and then, for example, it is not so possible that the photosensitive adhesive composition before cured is significantly deformed or flowed out, it is possible to increase the accuracy of alignment in laminating the semiconductor chips.
- the photosensitive adhesive composition of the present invention in a state before cured after etching process and ashing process has sufficient stickiness with the semiconductor chip as required in die bonding. Therefore, the adhesive layer for bonding the semiconductor chips to each other securely fixes the semiconductor chips to each other and contributes to improvement of the reliability of the chip laminate.
- the photosensitive adhesive composition of the present invention it is possible to realize the adhesive layer having sufficiently both adhesiveness and stress relaxation.
- the adhesive layer has both element protective function of buffer coat film (or, buffer coat function) and adhesive function of die bonding film (or, die bonding function) with a single layer, it is possible to form the chip laminate without decreasing the reliability and to thin the chip laminate as compared to the conventional one in two layers as well. Further, it is possible to reduce the volume of the mold portion and to shorten the bonding wire due to thinning of the chip laminate, thereby these factors contribute to light-weight and cost-savings.
- the indentation modulus of the cured product of the photosensitive adhesive composition of the present invention is generally 2 to 3 GPa at 25°C as described above, and further, in some other embodiments it is about 2.2 to 3.2 GPa and few other embodiments it is about 2.4 to 3.0 GPa.
- the indentation modulus of the cured product being less than the above lower limit, the adhesiveness of the adhesive layer is reduced, thereby the interface of the layer with the semiconductor chip is peeled, and, when the filler is contained in the mold part, the filler may pass through the adhesive layer and adversely affect the semiconductor chip.
- the flexibility of the adhesive layer is reduced, thereby stress relaxation is lowered and it is impossible to mitigate, for example, residual stress generated in accordance with lamination of the semiconductor chips and local concentration of thermal stress due to thermal expansion difference between the semiconductor chips and the adhesive layer. Consequently, cracks are made in the semiconductor chips, or the semiconductor chip and the adhesive layer are peeled off from each other.
- Such problems are readily overcome by the use of the photosensitive adhesive compositions of this invention.
- the indentation modulus of the cured product is measured with a nanoindenter at 25°C.
- the melt viscosity of the photosensitive adhesive composition of the present invention in a state before cure is generally from about 20 to 500 Pascal-second (Pa s) in the range of 100 to 200°C. Because such composition is superior in wettability with respect to the semiconductor chip 20 (FIG. 2), it becomes hard to generate voids or the like in the adhesive layer. Therefore, since it is possible to form homogeneous adhesive layers with little unevenness of physical properties, the adhesive layer hardly leads to local concentration of stress when the semiconductor chips are adhered together through the adhesive layer. Thereby, it is possible to inhibit the occurrence of cracks in the semiconductor chips and the occurrence of delamination between the adhesive layer and the semiconductor chip.
- Pa s Pascal-second
- the melt viscosity of the cured photosensitive adhesive composition of the present invention may be measured by a rheometer. Accordingly, in some of the embodiments of this invention, the melt viscosity before cure is from about 25 to 400 Pa s, and in some other embodiments it is from about 30 to 300 Pa s.
- the photosensitive adhesive composition of the present invention in a state before cure has certain adhesiveness, the adhesiveness can be decreased by performing UV irradiation thereon. Therefore, the photosensitive adhesive composition of the present invention may be controllable in adhesiveness depending on UV irradiation.
- the photosensitive adhesive composition of the present invention in a state before curing and after etching and ashing process as described above has stickiness generally greater than about 3.0 N/25mm at 25 °C with respect to a back grinding tape capable of releasing upon UV irradiation. Since the photosensitive adhesive composition of the present invention may achieve sufficient stickiness with respect to the back grinding film even after performing certain processes such as etching process and ashing process accelerating the deterioration of the organic material, it is still possible to fix securely a semiconductor wafer, when dicing process is performed to the semiconductor wafer formed with a film of the photosensitive adhesive composition of the present invention, thereby dicing accuracy can be improved.
- the stickiness (i.e., bond strength) referred to hereinabove is from 3.5 to 10.0 N/25mm.
- the photosensitive adhesive composition of the present invention in a state before cured and after UV irradiation has stickiness generally not more than 0.5 N/25mm at 50°C with respect to a back grinding tape capable of releasing upon UV irradiation. Since the photosensitive adhesive composition of the present invention features less tackiness with respect to the back grinding tape upon UV irradiation, when a chip is picked up after dicing process, it is easy to separate between the dicing tape and the coating film, thus preventing any potential defects, such as breaking of the chip, among others.
- the photosensitive adhesive composition of the present invention by reducing stickiness (i.e., the tackiness), it is possible to inhibit, for example, the photosensitive adhesive composition of the present invention from sticking to the dicing blade in the dicing process, and sticking to the collet in the mounting process. As a result, it is possible to inhibit failure in dicing or picking-up from occurring.
- the stickiness referred to hereinabove is from 0.05 N/25mm 0.4 N/25mm.
- the above UV irradiation process is a process of irradiating using light with wavelength of 365 nm with an exposure dose of up to 600 mJ/cm 2 in integrated amount of light.
- the exposure dose of the light source is in the range of from about 100 to 500 mJ/cm 2 . In some other embodiments the exposure dose of the light source is in the range of from about 150 to 400 mJ/cm 2 . In yet some other embodiments the exposure dose of the light source is in the range of from about 200 to 250 mJ/cm 2 .
- the resolution of the vias can be in the range from 1 to 100 ⁇ m. In some other embodiments, the resolution of the vias can be in the range from 3 to 30 ⁇ m. In yet some other embodiments, the resolution of the vias can be in the range from about 5 to 15 ⁇ m.
- the back-grinding UV peeling tape used in the above embodiments is generally made of acrylic resin. However, any other tape which can bring about the above noted result can also be employed.
- the photosensitive composition is soluble in an alkali developer.
- the electronic and/or the semiconductor device according to this invention encompass a laminated semiconductor element where said lamination consists of a photosensitive composition according to the present invention.
- the semiconductor device encompassing a redistribution layer (RDL) structure further incorporates a photosensitive composition according to this invention.
- the semiconductor device encompassing a chip stack structure further includes a photosensitive composition according to this invention.
- the semiconductor device encompassing a complementary metal oxide semiconductor (CMOS) image sensor dam structure further incorporates a photosensitive composition according to this invention.
- CMOS complementary metal oxide semiconductor
- a film is formed by the photosensitive composition according to this invention.
- such films generally exhibit excellent chemical, mechanical, elastic properties having a wide variety of utility in electronic, optoelectronic, microelectromechanical applications featuring excellent dielectric properties.
- a microelectronic or optoelectronic device encompassing one or more of a redistribution layer (RDL) structure, a chip-stack structure, a CMOS image sensor dam structure, where said structures further incorporates a photosensitive composition according to this invention.
- RDL redistribution layer
- a method of forming a film for the fabrication of a microelectronic or optoelectronic device comprising: coating a suitable substrate with a composition according to the invention to form a film; patterning the film with a mask by exposing to a suitable radiation; developing the film after exposure to form a photo-pattern; and curing the film by heating to a suitable temperature.
- the coating of the substrate with photosensitive composition of this invention can be performed by any of the coating procedures as described herein and/or known to one skilled in the art, such as by spin coating.
- the developing in accordance with the method of this invention can be performed by any of the known developing techniques such as by the use of an aqueous developer.
- the method according to this invention utilizes a developer, which is aqueous tetramethylammonium hydroxide (TMAH).
- TMAH aqueous tetramethylammonium hydroxide
- a substrate is first hardbaked in the method according to this invention before the curing step at a temperature of from 130°C to 160°C for 20 minutes to 60 minutes.
- the curing is performed at a temperature of from 170°C to 200°C at an incremental heating ramp of 5°C and for 1 to 5 hours.
- the polymers used to form the photosensitive compositions of this invention are generally known in the literature and are prepared in accordance with the well-known literature procedures. See for example U. S. Patent No. 9,696,623 B2, pertinent portions of which are incorporated herein by reference.
- any of the polymers as described herein can be used.
- a terpolymer of polynorbornene derivatives as described herein was dissolved in a suitable solvent such as propylene glycol methyl ether acetate (PGMEA) having the specific amounts of additives, expressed as parts per hundred resin (pphr), as summarized in Table 1 were mixed in an appropriately sized amber HDPE bottle. The mixture was rolled for 18 hours to produce a homogeneous solution.
- PGMEA propylene glycol methyl ether acetate
- Particle contamination was removed by filtering the polymer solution through a 0.45 ⁇ m pore polytetrafluoroethylene (PTFE) disc filter under 35 psi pressure, the filtered polymer solution was collected in a low particle HDPE amber bottle and the resulting solution stored at 5°C.
- PTFE polytetrafluoroethylene
- the composition thus formed was brought to room temperature and was applied to several 125 mm diameter silicon wafers (thickness: 625 ⁇ m) by spin coating initially at 200 r ⁇ m for 10 seconds and then at 500 r ⁇ m for 30 seconds.
- the substrates so formed were then placed on a 120°C hot plate for 4 minutes, providing about a 2 microns ( ⁇ m) thick polymer film.
- Each of the polymer film was then imagewise exposed through a range of exposure energies from 125-500 mJ/cm 2 .
- Each film was then developed using a puddle develo ⁇ ment method having about two 5 second immersions in 0.26N TMAH. After the develop process each wafer was rinsed by spraying deionized water for 5 seconds and then dried by spinning at 3000 r ⁇ m for 15 seconds.
- FIG. 1 shows photolithographic images obtained using a representative composition of this invention using different exposure energy.
- FIGs. 1A to ID show photolithographic images taken using a Stepper and a Mask Aligner at a threshold exposure dose of 125 mJ/cm 2 , 175 mJ/cm 2 , 225 mJ/cm 2 and 300 mJ/cm 2 respectively.
- Example 1 A composition substantially similar to Example 1 was prepared but contained no tetra functional epoxy compound package but a few other additives as summarized in Table 1 for Comparative testing as described in Examples 2 and 3.
- Example 1 The composition as described in Example 1 was spin-coated onto a silicon wafer and baked at 120 °C for 4 min to a film thickness of 10 ⁇ m. The film was hardbaked at 150 °C for 40min. Then, the wafer was singulated into 10 mm x 20 mm chips. Next, the chips were placed on a 150 °C hotplate while a separate 4 mm x 4 mm silicon chip was pressed into the surface of the coated singulated chip with a force of 1 kg-f for 1 second. The bonded chips were transferred to a nitrogen oven where the composition of Example 1 was cured at 180 °C for 2 hr. After curing, the chip assembly was transferred to a heated stage (260 °C) where the 4 mm x 4 mm die was sheared off from the 10 mm x 20mm chip containing the composition of Example 1. The die shear forces were measured and recorded.
- FIG. 2 shows the results obtained from the die shear measurements. It is clear from this data that the composition of Example 1 is surprisingly much superior to that of the Comparative Example 1.
- Example 1 The composition as described in Example 1 was spin-coated onto a suitable substrate and baked at 120 °C for 4 min.
- the coated film was then image-wise exposed to suitable actinic radiation using a mercury vapor lamp (200-450 nm).
- TMAH tetramethylammonium hydroxide
- the exposed substrate was then developed using tetramethylammonium hydroxide (TMAH) developer to reveal the unexposed region.
- TMAH tetramethylammonium hydroxide
- the cured samples were then exposed to acidic etchant to remove any oxidized surface.
- the temperature of the etchant was maintained at a temperature range from about ambient room temperature up to 50 °C for about 5 minutes to 15 minutes.
- the polymer samples are observed under optical microscopy to observe any delamination or over etching that occurred during the process.
- Various compositions made in accordance of this invention showed less delamination when compared with Example 1 as well as Comparative Example 1.
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WO2006017035A1 (en) | 2004-07-07 | 2006-02-16 | Promerus Llc | Photosensitive dielectric resin compositions and their uses |
WO2014176490A1 (en) | 2013-04-26 | 2014-10-30 | Promerus, Llc | Photosensitive compositions and applications thereof |
US9696623B2 (en) | 2013-04-26 | 2017-07-04 | Promerus, Llc | Photosensitive compositions and applications thereof |
JP6006457B2 (en) | 2013-06-27 | 2016-10-12 | プロメラス, エルエルシー | Photosensitive composition and its application |
WO2016063908A1 (en) * | 2014-10-22 | 2016-04-28 | 住友ベークライト株式会社 | Photosensitive adhesive composition and semiconductor device |
KR102355576B1 (en) | 2014-10-24 | 2022-01-25 | 스미또모 베이크라이트 가부시키가이샤 | Photosensitive adhesive composition and semiconductor device |
-
2019
- 2019-10-17 KR KR1020227015895A patent/KR20220084094A/en unknown
- 2019-10-17 EP EP19798796.9A patent/EP4045564A1/en active Pending
- 2019-10-17 JP JP2022522909A patent/JP7447252B2/en active Active
- 2019-10-17 CN CN201980101333.4A patent/CN114555674A/en active Pending
- 2019-10-17 WO PCT/US2019/056647 patent/WO2021076131A1/en unknown
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JP7447252B2 (en) | 2024-03-11 |
WO2021076131A1 (en) | 2021-04-22 |
CN114555674A (en) | 2022-05-27 |
JP2023506116A (en) | 2023-02-15 |
KR20220084094A (en) | 2022-06-21 |
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