Patent ID: 7629105
Filing Date: 2009-12-08
Classification: G03F,Y10S

Abstract:
1. A positive resist composition, comprising a resin component (A), which contains acid dissociable, dissolution inhibiting groups and exhibits increased alkali solubility under action of acid, and an acid generator component (B) that generates acid on exposure, wherein said resin component (A) is a copolymer (A1) comprising a first structural unit (a1) derived from hydroxystyrene and a second structural unit (a2) derived from a (meth)acrylate ester having an alcoholic hydroxyl group, in which a portion of hydroxyl groups of said structural units (a1) and alcoholic hydroxyl groups of said structural units (a2) have been protected with said acid dissociable, dissolution inhibiting groups, and said composition further comprises a component (C), which contains at least one acid dissociable, dissolution inhibiting group, and which under action of acid generated from said component (B), undergoes dissociation of said dissolution inhibiting group, generating an organic carboxylic acid.