Patent ID: 8192914
Filing Date: 2012-06-05
Classification: G03F,Y10S

Abstract:
1. 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 wherein, R represents a hydrogen atom, halogen atom, lower alkyl group, or halogenated lower alkyl group; and X wherein, R represents a hydrogen atom, halogen atom, lower alkyl group, or halogenated lower alkyl group; X 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.