Patent ID: 8367296
Filing Date: 2013-02-05
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 component (A) comprising: a polymeric compound (A1′) comprising 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 exclusive of said structural unit (a0), said polymeric compound (A1′) containing an acid dissociable, dissolution inhibiting group within the structure thereof; or a polymeric compound (A1) comprising a structural unit (a0) represented by general formula (a0-1) shown below and a structural unit (a1) derived from an acrylate ester containing an acid dissociable, dissolution inhibiting group exclusive of said structural unit (a0) and said structural unit (a2): wherein R 1 represents a hydrogen atom, a lower alkyl group or a halogenated lower alkyl group; R 2 represents a divalent linking group; each R′ independently represents a hydrogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxy group of 1 to 6 carbon atoms or —COOR″, wherein R″ represents a hydrogen atom or an alkyl group; and A″ represents an oxygen atom, a sulfur atom, or an alkylene group of 1 to 5 carbon atoms which may contain an oxygen atom or a sulfur atom.