Patent ID: 8481242

Claim:
A salt represented by the formula (X): wherein Q 1 and Q 2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, L 1 and L 2 independently each represent a C1-C17 divalent saturated hydrocarbon group in which one or more —CH 2 — can be replaced by —O— or —CO—, ring W 1 represents a C3-C36 saturated hydrocarbon ring, R 5 is independently in each occurrence a C1-C6 alkyl group or a C1-C6 alkoxy group, w represents an integer of 0 to 2, v represents 1 or 2, Z + represents an organic counter ion, and W 10 represents a group represented by the formula (X-1): wherein ring W 2 represents a C3-C36 saturated hydrocarbon ring, R 1 represents a C1-C12 hydrocarbon group, R 2 is independently in each occurrence a C1-C6 alkyl group or a C1-C6 alkoxy group, and s represents an integer of 0 to 2, or a group represented by the formula (X-2): wherein ring W 3 represents a C4-C36 lactone ring, R 3 is independently in each occurrence a C1-C6 alkyl group, a C1-C6 alkoxy group or a C2-C7 alkoxycarbonyl group and t represents an integer of 0 to 2.