Patent ID: 8192914

Claim:
A resist composition for immersion exposure comprising a resin component (A) which exhibits changed alkali solubility under action of acid and an acid-generator component (B) which generates acid upon irradiation, said resin component (A) comprising a resin (A1) which contains a structural unit (a0) selected from the group consisting of structural units represented by general formulas (a0-1) to (a0-3) shown below, a structural unit (a1) selected from the group consisting of structural units represented by general formulas (a1-0-1) and (a1-0-2) shown below, a structural unit (a2) derived from an acrylate ester having a lactone-containing cyclic group and a structural unit (a3) derived from an acrylate ester having a polar group-containing aliphatic hydrocarbon group, wherein R represents a hydrogen atom, an alkyl group, a halogen atom or a halogenated alkyl group; R 21 represents an aliphatic cyclic group having a valency of (e+1); R 22 and R 23 each independently represents a hydrogen atom or a monovalent aliphatic cyclic group, with the proviso that at least one of R 22 and R 23 represents an aliphatic cyclic group; a, d and f each independently represents an integer of 0 to 5; b and c each independently represents an integer of 1 to 5; and e represents 2 or 3, wherein, R represents a hydrogen atom, halogen atom, lower alkyl group, or halogenated lower alkyl group; and X 1 represents an acid dissociable, dissolution inhibiting group, wherein, R represents a hydrogen atom, halogen atom, lower alkyl group, or halogenated lower alkyl group; X 2 represents an acid dissociable, dissolution inhibiting group; and Y 2 represents an alkylene group or an aliphatic cyclic group, and a resin (A2) which has a structural unit (a′1) derived from an acrylate ester containing no fluorine atom and having an acid dissociable, dissolution inhibiting group, a structural unit (a′2) derived from an acrylate ester containing no fluorine atom and having a lactone-containing cyclic group and a structural unit (a′3) derived from an acrylate ester containing no fluorine atom and having a polar group-containing aliphatic hydrocarbon group, wherein the amount of said resin (A1) contained in said resin component (A) is within the range from 0.1 to 20% by weight.