Patent ID: 8288077

Claim:
A salt represented by formula (A1): wherein Z + represents an organic cation, Q 1 and Q 2 each independently represent a fluorine atom or a linear or branched C 1-6 perfluoroalkyl group, L a1 represents â€”(CH 2 ) m1 â€”, m1 represents an integer ranging from 1 to 6, a methylene group contained in the â€”(CH 2 ) m1 â€” may be replaced by an oxygen atom (â€”Oâ€”) or a carbonyl group (â€”COâ€”), at least one hydrogen atom of the â€”(CH 2 ) m1 â€” may be replaced with a linear or branched C 1-4 aliphatic hydrocarbon group, L a2 represents a single bond, â€”Oâ€”(CH 2 ) L1 â€”, or â€”COâ€”Oâ€”(CH 2 ) L1 â€”, L1 represents an integer ranging from 1 to 6, a methylene group contained in the â€”(CH 2 ) L1 â€” may be replaced with an oxygen atom or a carbonyl group, at least one hydrogen atom of the â€”(CH 2 ) L1 â€” may be replaced with a linear or branched C 1-4 aliphatic hydrocarbon group, R a1 represents a C 4-36 divalent alicyclic hydrocarbon group or a C 6-18 divalent aromatic hydrocarbon group, and at least one hydrogen atom of the alicyclic hydrocarbon group or the aromatic hydrocarbon group may be replaced with a halogen atom, a linear, branched or cyclic C 1-12 aliphatic hydrocarbon group, a C 7-21 aralkyl group, a glycidyloxy group, or a C 2-4 acyl group, at least one hydrogen atom of the alicyclic hydrocarbon group may be replaced with a C 6-20 aromatic hydrocarbon group, a methylene group contained in the linear, branched or cyclic aliphatic hydrocarbon group, or the aralkyl group may be replaced with an oxygen atom or a carbonyl group, R a2 represents an elimination group represented by the formula (II-1) or (II-2); wherein R a3 and R a4 each independently represent a hydrogen atom or a linear or branched C 1-12 aliphatic hydrocarbon group, R a5 represents a linear, branched or cyclic C 1-24 aliphatic hydrocarbon group, R a6 represents a C 2-24 divalent aliphatic hydrocarbon group, and R a7 represents a linear or branched C 1-12 aliphatic hydrocarbon group.