Patent ID: 7667050

Claim:
A salt represented by the formula (I): wherein X represents a C3-C30 divalent group containing at least one divalent alicyclic hydrocarbon group, and at least one —CH 2 — in the C3-C30 divalent group may be replaced with —O— or —CO—, Y represents a C3-C30 cyclic hydrocarbon group which may be substituted with at least one group selected from a C1-C6 alkoxy group, a C1-C4 perfluoroalkyl group, a C1-C6 hydroxyalkyl group, a hydroxyl group and a cyano group, and at least one —CH 2 — in the C3-C30 cyclic hydrocarbon group may be replaced with —O— or —CO—, Q 1 and Q 2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, and A + represents an organic counter ion.