Patent ID: 9063421
Filing Date: 2015-06-23
Classification: G03F,H01L,H05K

Abstract:
1. A chemically amplified positive resist composition comprising (A) 100 parts by weight of a base resin, (B) 0.05 to 20 parts by weight of a photoacid generator, (C) 0.1 to 50 parts by weight of a thermal crosslinker which causes the resist composition to cure via crosslinker by condensation or addition reaction between the crosslinker and phenolic hydroxyl groups in the resist composition or between crosslinker molecules, and (D) 50 to 5,000 parts by weight of an organic solvent, said base resin being a polymer, which is insoluble or substantially insoluble in an alkaline developer, consisting of recurring units having the general formula (1) and not including recurring units having an epoxy group or oxetanyl group: wherein R 1 is each independently hydrogen, hydroxyl, straight or branched alkyl, or trifluoromethyl, R 2 is hydrogen, 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 are numbers falling in the range: 0.2≦p/(p+q+r)≦0.8; 0≦q/(p+q+r)≦0.5; 0≦r/(p+q+r)≦0.5 and; p+q+r=1, the polymer having a weight average molecular weight of 1,000 to 500,000, and said thermal crosslinker being an epoxy or oxetane resin of cresol novolak type, or polyfunctional type having a monovalent hydrocarbon group on phenyl.