Patent ID: 8535868

Claim:
A positive resist composition comprising: a resin component (A1) comprising a structural unit (a1) derived from an acrylate ester which may have an atom other than hydrogen or a group bonded to the carbon atom on the α position and containing an acid dissociable, dissolution inhibiting group, a structural unit (a0) derived from an acrylate ester which may have an atom other than hydrogen or a group bonded to the carbon atom on the α position and containing an —SO 2 — containing cyclic group, and a structural unit (a5) represented by general formula (a5-1) shown below, a compound (C1) represented by general formula (c1) shown below; and an acid-generator component (B) which generates acid upon exposure, excluding the compound (C1): wherein R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms; Y 5 represents an aliphatic hydrocarbon group which may have a substituent: Z represents a monovalent organic group; a represents an integer of 1 to 3, and b represents an integer of 0 to 2, provided that a+b=1 to 3; and each of c, d and e independently represents an integer of 0 to 3, wherein R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms; Y 1 represents a divalent aliphatic hydrocarbon group; R 1 represents a hydrogen atom, a fluorine atom, an alkyl group or a fluorinated alkyl group; p represents an integer of 1 to 10; and A + represents an organic cation.