Patent ID: 8216764

Claim:
A positive resist composition comprising a resin component (A) which exhibits increased alkali solubility under action of acid and an acid-generator component (B) which generates acid upon exposure, said resin component (A) comprising a resin (A1) represented by general formula (A1-11) shown below, and a resin (A2) represented by general formula (A2-11) shown below, wherein the mixing ratio of said resin (A1) to said resin (A2) is 60:40 to 40:60, and wherein said acid-generator component (B) comprises an acid generator (B1) having a cation moiety represented by general formula (b′-1) shown below: wherein R represents a hydrogen atom, a halogen atom, a lower alkyl group or a halogenated lower alkyl group; and R 10 represents a lower alkyl group; wherein R represents a hydrogen atom, a halogen atom, a lower alkyl group or a halogenated lower alkyl group; and each of R a to R c independently represents a lower alkyl group; and wherein each of R 1 and R 2 independently represents a naphthyl group which may have a substituent; and R 3 represents an alkyl group or an aryl group exclusive of a naphthyl group, wherein the amount of said acid generator (B1) based on the entire acid-generator component (B) is 80% by weight or more.