Patent ID: 7741009

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) having a structural unit (a1) represented by general formula (a1-0-2) shown below: wherein R represents a hydrogen atom, a lower alkyl group or a halogenated lower alkyl group; X 2 represents an acid dissociable, dissolution inhibiting group; and Y 2 represents an alkylene group or a divalent aliphatic cyclic group; and said acid-generator component (B) comprising an acid generator (B1) consisting of a compound represented by general formula (b1-12) shown below: R 2 —O—Y 1 —SO 3 − A + (b1-12) wherein R 2 a naphthylmethyl group; Y 1 represents an alkylene group of 1 to 4 carbon atoms which may be substituted with a fluorine atom; and A + represents a cation.