Patent ID: 9017905
Filing Date: 2015-04-28
Classification: G03F

Abstract:
1. A chemically amplified positive resist composition comprising (A) a base resin, (B) a photoacid generator, (C) a thermal crosslinker, and (D) an organic solvent, wherein said base resin (A) is a polymer comprising recurring units having the general formula (1): wherein R 1 is each independently hydrogen, hydroxyl, straight or branched alkyl, or trifluoromethyl, R 2 is hydroxyl or trifluoromethyl, R 3 is C 4 -C 20 tertiary alkyl, R 4 is an acid labile group exclusive of tertiary alkyl, n is 0 or an integer of 1 to 4, m is 0 or an integer of 1 to 5, p, q and r each are 0 or a positive number, meeting 0.8≦p+q+r≦1, the polymer having a weight average molecular weight of 1,000 to 500,000, and said thermal crosslinker (C) is a siloxane compound comprising structural units having the general formula (2): wherein R 11 is a crosslinking group having the general formula (3-1), (3-2) or (3-3): R 12 is a straight, branched or cyclic C 1 -C 12 alkyl or aryl group, R 13 and R 14 each are as defined for R 12 or a C 1 -C 6 alkoxy group, R 15 is as defined for R 11 , R 12 or R 13 , s, u and x each are 0 or a positive number, at least one of s, u and x is a positive number, with the proviso that R 15 is R 11 when both s and u are 0, t, v and w each are 0 or a positive number, s+t+u+v+w+x=1, and R 16 is hydrogen, C 2 -C 20 alkyl, benzyl, phenyl or tolyl.