Patent ID: 8232040

Claim:
A positive resist composition comprising: a base material component (A) that exhibits increased solubility in an alkali developing solution under action of an acid; and an acid generator component (B) that generates an acid upon exposure, wherein said base material component (A) includes a polymeric compound (A1) having a structural unit (a10) derived from hydroxystyrene and a structural unit (a11) represented by general formula (a11-1) shown below: wherein R 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 21 represents an alkyl group; and R 22 represents a group that forms an aliphatic monocyclic group of 7 to 10-membered ring together with the carbon atom to which this R 22 group is bonded.