Patent ID: 8263307

Claim:
A positive resist composition comprising a resin component (A) which exhibits increased solubility in an alkali developing solution under action of acid and an acid-generator component (B) which generates acid upon exposure, said resin component (A) comprising a structural unit (a0) represented by general formula (a0) shown below, a structural unit (a1) derived from an acrylate ester containing an acid dissociable, dissolution inhibiting group exclusive of groups that exhibit aromaticity, and a structural unit (a2) derived from an acrylate ester containing a lactone-containing cyclic group and a structural unit (a3) represented by general formula (a3-1) shown below: wherein R represents a hydrogen atom, a lower alkyl group of 1 to 5 carbon atoms or a halogenated lower alkyl group of 1 to 5 carbon atoms; Q represents a divalent linking group , containing a nitrogen atom, —O—, —O—R 02 — or —O—R 02 —O—C(O)—, wherein R 02 represents a linear alkylene group; R 6 represents a lower alkyl group of 1 to 5 carbon atoms or an alkoxy group of 1 to 5 carbon atoms; p represents an integer of 1 to 3; and q represents an integer of 0 to 2; wherein R represents a hydrogen atom, a lower alkyl group of 1 to 5 carbon atoms or a halogenated lower alkyl group of 1 to 5 carbon atoms; and j is an integer of 1 to 3.