Patent ID: 7459261

Claim:
A resist composition comprising a polymer in which: a sulfonium salt having a polymerizable unsaturated double bond, a (meth)acrylate having a lactone or a hydroxyl group as adhesion group, and a (meth)acrylate having an ester substituted with an acid labile group are copolymerized; wherein the repeating unit formed from the sulfonium salt having a polymerizable unsaturated bond is represented by the following general formula (1) where: R 1 represents a hydrogen atom or a methyl group, R 2 represents any one of: —O—R 6 —, —C(═O)—X 1 —R 6 —, —C(═O)—O—C 2 H 4 —O—Y 1 —, —C(═O)—O-Z 1 -C(═O)—CH 2 —, —Z 1 —C(═O)—CH 2 —, —C(═O)—O—Z 1 —CH 2 —, —C(═O)—O—CH 2 —C(═O)—O—Z 1 -, and —C(═O)—O—C 2 H 4 —C(═O)—O—Z 1 -, where: X 1 represents an oxygen atom or NH, R 6 represents a linear, branched or cyclic alkylene group having 1-6 carbon atoms or a phenylene group which may contain a carbonyl group, an ester group or an ether group, Y 1 represents any one of a phenylene group, a naphthylene group, and an anthrylene group, and Z 1 represents a phenylene group, R 3 and R 4 each independently represents: a linear, branched or cyclic alkyl group having 1-12 carbon atoms which may contain a carbonyl group, an ester group or an ether group, an aryl group having 6-12 carbon atoms, an aralkyl group having 7-20 carbon atoms or a thiophenyl group, or R 3 and R 4 may bond each other to form a ring, and R 5 represents a perfluoro-4-ethylcyclohexyl group.