Patent ID: 8685619

Claim:
A resist composition comprising a resin having a structural unit represented by the formula (I), a resin being insoluble or poorly soluble in alkali aqueous solution, but becoming soluble in an alkali aqueous solution by the action of an acid and not including the structural unit represented by the formula (I), and an acid generator represented by the formula (II), wherein R 1 represents a hydrogen atom or a methyl group; A 1 represents a C 1 to C 6 alkanediyl group; A 13 represents a C 1 to C 6 perfluoro alkanediyl group; X 12 represents *â€”COâ€”Oâ€” or *â€”Oâ€”COâ€”, * represents a bond to A 13 ; A 14 represents a C 1 to C 17 aliphatic hydrocarbon group that optionally has one or more halogen atoms; wherein R 23 and R 24 independently represent a fluorine atom or a C 1 to C 6 perfluoroalkyl group; X 21 represents an C 1 to C 17 divalent saturated hydrocarbon group, one or more hydrogen atom contained in the divalent saturated hydrocarbon group may be replaced by a fluorine atom, and one or more â€”CH 2 â€” contained in the divalent saturated hydrocarbon group may be replaced by â€”Oâ€” or â€”COâ€”; R 25 represents a group having cyclic ether structure; and Z 1+ represents an organic cation.