Patent ID: 7700257

Claim:
A photoresist composition comprising: a polymer (A) comprising an alkali-soluble constituent unit (a1) comprising an alicyclic group having both a fluorine atom(s) or a fluorinated alkyl group (i) and an alcoholic hydroxyl group (ii), wherein alkali-solubility of said polymer is changeable by an action of an acid, wherein said fluorine atom or fluorinated alkyl group (i) and said alcoholic hydroxyl group (ii) are each bound onto the alicyclic group, and the cyclic group constitutes a main chain and wherein said constituent unit (a1) is formed by cyclic polymerization of a diene compound having a hydroxyl group and fluorine atoms; an acid generator (B) which generates an acid by light irradiation; and a dissolution inhibitor (C) having a fluorine atom(s), wherein said dissolution inhibitor having a fluorine atom(s) is a compound represented by the following general formula (1) or (2): wherein R 1 is a hydrogen atom, alkyl, alkoxy or a fluorine atom, R 2 is an acid-dissociative dissolution inhibiting group, A is a bivalent organic group represented by —C(C n F 2n+1 )(C m F 2m+1 )—O—CO—O—, C(C n F 2n+1 )(C m F 2m+1 )—O— or —O—CO—O—, and n, m, p and q are each independently integers of 1 to 4 ; with a proviso that, when A is —O—CO—O—, R 1 is at least one fluorine atom.