Patent ID: 7326515
Filing Date: 2008-02-05
Classification: G03F,Y10S

Abstract:
1. A positive type resist composition comprising (A) a resin component comprising within the principal chain a structural unit derived from a (meth)acrylate ester and incorporating an acid dissociable, dissolution inhibiting group containing a polycyclic group on an ester side chain section, for which solubility in alkali increases under action of acid, (B) an acid generator component which generates acid on exposure, and (C) an organic solvent, wherein said component (A) comprises both of: a structural unit (a1) derived from an acrylate ester, and comprising an acid dissociable, dissolution inhibiting group containing a polycyclic group, and a structural unit (a1′) derived from a methacrylate ester, and comprising an acid dissociable, dissolution inhibiting group containing a polycyclic group.