Patent ID: 8652753

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), an acid generator, and a salt having an anion represented by the formula (IA). 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 18 divalent aliphatic hydrocarbon group that optionally has one or more halogen atoms; X 12 represents *-CO—O— or *-O—CO—; * 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 1A and R 2A independently represent a hydrogen atom, a C 1 to C 12 aliphatic hydrocarbon group, a C 3 to C 20 alicyclic hydrocarbon group, a C 6 to C 20 aromatic hydrocarbon group or a C 7 to C 21 aralkyl group, one or more hydrogen atoms contained in the aliphatic hydrocarbon group, the alicyclic hydrocarbon group, the aromatic hydrocarbon group and the aralkyl group may be replaced by a hydroxy group, a cyano group, a fluorine atom, trifluoromethyl group or a nitro group, one or more —CH 2 — contained in the aliphatic hydrocarbon group may be replaced by —O— or —CO—; or R 1A and R 2A may be bonded to form at least one nitrogen atom-containing C 4 to C 20 ring.