Patent ID: 8795948
Filing Date: 2014-08-05
Classification: G03F

Abstract:
1. A resist composition comprising a base component (A) which generates acid upon exposure and exhibits changed solubility in a developing solution under the action of acid, the base component (A) comprising a polymeric compound (A1) comprising a structural unit (a0) represented by general formula (a0-1) shown below, a structural unit (a1) containing an acid decomposable group which exhibits increased polarity by the action of acid and a structural unit (a6) which generates acid upon exposure and includes a group represented by general formula (a6-0-1) or (a6-0-2) shown below: wherein R 1 represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms; W represents —COO—, —CONH—or a divalent aromatic hydrocarbon group; Y 1 and Y 2 each independently represents a divalent linking group or a single bond; R′ 1 represents a hydrogen atom; R′ 2 represents a methyl group; and R 2 is a group represented by general formula (3-1) shown below: wherein A′ represents an oxygen atom; a represents an integer of 0 to 2; and R 8 represents an alkyl group,an alkoxy group, a halogenated alkyl group, a hydroxyl group, —COOR″, —OC(═O)R″, a hydroxyalkyl group or a cyano group, wherein R″ represents a hydrogen atom or an alkyl group; wherein Q 1 and Q 2 each independently represents a single bond or a divalent linking group; R 3 , R 4 and R 5 each independently represents an organic group, provided that R 4 and R 5 may be mutually bonded to form a ring with the sulfur atom in the formula; V − represent a counteranion; A − represents an organic group containing an anion; and M m+ represents an organic cation having a valency of m, wherein m represents an integer of 1 to 3.