Patent ID: 9023587
Filing Date: 2015-05-05
Classification: C08F,G03F,Y10S

Abstract:
1. A chemically amplified negative resist composition comprising a polymer as base resin, an acid generator and a crosslinker, said polymer comprising recurring units (a) and hydroxyl-containing recurring units (b), represented by the general formula (1): wherein R 1 is a straight C 1 -C 4 alkylene group, R 2 is hydrogen, methyl or trifluoromethyl, R 3 is hydrogen or methyl, Y 1 is a single bond, —C(═O)—O— or —C(═O)—NH—, R 4 is a single bond or a straight or branched C 1 -C 6 alkylene group, R 5 is hydrogen, fluorine, trifluoromethyl, cyano, or a straight, branched or cyclic C 1 -C 6 alkyl, alkoxy, alkoxycarbonyl, acyl or acyloxy group, R 6 is a single bond or a straight, branched or cyclic C 1 -C 12 alkylene group, m is an integer of 0 to 4, n is 1 or 2, a and b are in the range: 0<a<1.0 and 0<b<1.0.