Patent ID: 7638257

Claim:
A positive resist composition, comprising: a resin component (A) that exhibits changed alkali solubility under action of acid; and an acid generator component (B), wherein said component (A) includes a polymer compound (A1) having a structural unit (a0) represented by a general formula (a0) shown below, and a structural unit (a1), which is derived from an (α-lower alkyl) acrylate ester containing an acid-dissociable, dissolution-inhibiting group and is not classified as the structural unit (a0): (wherein, R represents a hydrogen atom or a lower alkyl group; Y 1 represents an aliphatic cyclic group; Z represents an alkoxyalkyl group; a represents an integer from 1 to 3, and b represents either 0 or an integer from 1 to 2, provided that a+b=1 to 3).