Patent ID: 6982140
Filing Date: 2006-01-03
Classification: G03F,Y10S

Abstract:
1. A positive type resist composition formed by dissolving (A) a resin component with a unit derived from a (meth)acrylate ester in a principal chain, for which solubility in alkali increases under action of acid, and (B) an acid generator component which generates acid on exposure, in an organic solvent component (C), wherein said resin component (A) is a copolymer comprising (a1) a unit derived from a (meth)acrylate ester comprising an acid dissociable, dissolution inhibiting group containing a polycyclic group, (a2) a unit derived from a (meth)acrylate ester comprising a lactone containing monocyclic group or polycyclic group, (a3) a unit derived from a (meth)acrylate ester comprising a hydroxyl group containing polycyclic group, and (a4) a unit derived from a (meth)acrylate ester comprising a polycyclic group which is different from said unit (a1), said unit (a2) and said unit (a3).