Patent ID: 8232041

Claim:
A positive resist composition comprising: a base component (A) that exhibits increased solubility in an alkali developing solution under action of acid; and an acid-generator component (B) that generates acid upon exposure, wherein said base component (A) comprising a polymeric compound (A1) containing a structural unit (a0-1) represented by general formula (a0-1) shown below, a structural unit (a0-2) represented by general formula (a0-2) shown below, and a structural unit (a1-0-1) represented by general formula (a1-0-1) shown below, and relative to a combined total of all structural units that constitute said polymeric compound (A1), a proportion of said structural unit (a0-1) is within a range from 10 to 40 mol %, a proportion of said structural unit (a0-2) is within a range from 5 to 20 mol %, and a proportion of said structural unit (a1-0-1) is within a range from 10 to 55 mol %: wherein each of R 1 and R independently 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 , A and B each represents a divalent linking group, R 3 represents a cyclic group containing —SO 2 — within a ring skeleton thereof, and R 4 and X 1 each represents an acid-dissociable, dissolution-inhibiting group.