Patent ID: 7682770
Filing Date: 2010-03-23
Classification: G03F,Y10S

Abstract:
1. A resist composition comprising a resin component (A) that undergoes a change in alkali solubility in the presence of acid, and an acid generator component (B) that generates acid on exposure, wherein: said resin component (A) has a weight average molecular weight of no more than 7,500 and comprises structural units (a) derived from a (meth)acrylate ester, wherein said structural units (a) comprise a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group which is represented by the following general formula (I), wherein, R represents a hydrogen atom or a methyl group, and R 1 represents a lower alkyl group of 2 to 5 carbon atoms, a structural unit (a2) derived from a (meth)acrylate ester comprising a lactone-containing polycyclic group, and a structural unit (a3) derived from a (meth)acrylate ester comprising a hydroxyl group-containing aliphatic hydrocarbon group; and wherein said component (B) comprises a sulfonium compound represented by a general formula (b-1) shown below: wherein, X represents a perfluoroalkylene group of 3 carbon atoms; R 1 to R 3 each represents, independently, an aryl group or an alkyl group, and at least one of R 1 to R 3 represents an aryl group.