Patent ID: 8329378

Claim:
A positive resist composition, comprising a base 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, wherein said base component (A) comprises a polymeric compound (A1) containing a structural unit (a0) having an aromatic group, a structural unit (a5) represented by general formula (a5-1) shown below, and a structural unit (a1) containing an acid-dissociable, dissolution-inhibiting group: wherein R 1 represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms, R 2 represents a divalent linking group, and R 3 represents a cyclic group containing —SO 2 — within a ring skeleton thereof.