Patent ID: 7687221
Filing Date: 2010-03-30
Classification: C08F,C08K,C09D,G03F,Y10S

Abstract:
1. A positive resist composition comprising a resin component (A) which has acid dissociable, dissolution inhibiting groups and exhibits increased alkali solubility under the action of an acid, and an acid generator component (B) which generates an acid under exposure, wherein the resin component (A) contains a polymer compound (A1) having a structural unit (a1) derived from hydroxystyrene and a structural unit (a2) represented by the following general formula (a2-1): wherein R represent a fluorine atom or a fluorinated lower alkyl group, and R 1 represents an organic group having acid dissociable, dissolution inhibiting groups (II) represented by the following general formula (II): wherein X′ represents an aliphatic cyclic group, an aromatic cyclic hydrocarbon group or a lower alkyl group; R 4 represents a hydrogen atom, or a lower alkyl group, or X′ and R 4 each independently represents an alkylene group having 1 to 5 carbon atoms and the end of X′ and the end of R 4 may be bonded; R 5 represents a lower alkyl group or a hydrogen atom; and Y represents an aliphatic cyclic group.