Patent ID: 8182976
Filing Date: 2012-05-22
Classification: C08F,G03F

Abstract:
1. A positive resist composition comprising a base component (A) which exhibits increased solubility in an alkali developing solution under action of acid and an acid-generator component (B) which generates acid upon exposure, said base component (A) comprising a polymeric compound (A1) containing a structural unit (a0) represented by general formula (a0-1) shown below and a structural unit (a2) derived from an acrylate ester containing a lactone-containing cyclic group, and said polymeric compound (A1) containing an acid dissociable, dissolution inhibiting group within the structure thereof, wherein R 1 represents a hydrogen atom, a lower alkyl group or a halogenated lower alkyl group; R 2 represents a divalent linking group; and R 3 represents a cyclic group containing —SO 2 — within the ring skeleton thereof.