Patent ID: 9316915
Filing Date: 2016-04-19
CPC Classification: C08F,C08L,G03F,H01L

Claim Text:
1. A chemically amplified negative resist composition comprising a polymer as a base resin comprising recurring units (a) of the general formula (1) and recurring units of at least one type selected from the group consisting of a vinylnaphthalene (b1), indene (b2), acenaphthylene (b3), chromone (b4), coumarin (b5), norbornadiene (b6), and vinylcarbazole (b7), as represented by the general formula (2), the polymer having a weight average molecular weight of 1,000 to 500,000, an organic solvent, and an acid generator, wherein R 1 is hydrogen or methyl, X is a single bond or —C(═O)—O—R 4 —, R 2 is a single bond or C 1 -C 4 alkylene group, R 3 is a linear C 2 -C 8 alkylene group, R 4 is a single bond or C 1 -C 4 alkylene group, wherein R 5 is hydrogen or methyl, m is an integer of 0 to 2, n is an integer of 0 to 5, R 110 to R 116 are each independently hydrogen, C 1 -C 30 alkyl, partially or entirely halo-substituted alkyl, the alkyl and halo-substituted alkyl optionally having an alkyl-substituted or unsubstituted hydroxyl or carboxyl group, hydroxyl, C 1 -C 4 alkoxy, acyl, acyloxy, alkoxycarbonyl, C 6 -C 10 aryl, halogen, or 1,1,1,3,3,3-hexafluoro-2-propanol group, Y is a single bond, —O—, —S—, —C(═O)—O—R 6 —, or —C(═O)—NH—R 6 —, R 6 is a single bond or C 1 -C 4 alkylene group, X 0 is methylene, oxygen or sulfur atom; b1 to b7 are numbers in the range: 0≦b1<1.0, 0≦b2<1.0, 0≦b3<1.0, 0≦b4<1.0, 0≦b5<1.0, 0≦b6<1.0, 0≦b7<1.0, 0<b1+b2+b3+b4+b5+b6+b7<1.0, 0<a<1.0, and 0 <a+b1+b2+b3+b4+b5+b6+b7≦1.0.