Patent ID: 8354217

Claim:
A salt represented by the formula (I-AA): wherein Q 1 and Q 2 each independently represent a fluorine atom or a C1-C4 perfluoroalkyl group, X 1 represents a single bond or —(CH 2 ) k —, and one or more —CH 2 — in —(CH 2 ) k — can be replaced by —O— or —CO— and one or more hydrogen atoms in —(CH 2 ) k — can be replaced C1-C4 aliphatic hydrocarbon group, and k represents an integer of 1 to 17, Y 1 represents a C3-C36 alicyclic hydrocarbon group which can have one or more substituents having no fluorine atom, and one or more —CH 2 — of which can be replaced by —O— or —CO—, A 1 and A 2 independently each represents a C1-C20 aliphatic hydrocarbon group, a C3-C20 alicyclic hydrocarbon group or a C6-C20 aromatic hydrocarbon group, or A 1 and A 2 are bonded each other to form a C3-C20 ring, and one or more hydrogen atoms in the aliphatic hydrocarbon group, the alicyclic hydrocarbon group, the aromatic hydrocarbon group and the ring can be replaced by a hydroxyl group, a C1-C12 alkyl group, a C1-C12 alkoxy group or a C3-C36 alicyclic hydrocarbon group, Ar 1 represents a (m 4 +1)-valent C6-C20 aromatic hydrocarbon group which can have one or more substituents, B 1 represents a single bond or C1-C6 alkylene group, and one or more —CH 2 — in the alkylene group can be replaced by —O— or —CO—, B 2 represents a C4-C18 lactone ring group not capable of being eliminated by the action of an acid and one or more hydrogen atoms in the lactone ring group can be replaced by a cyano group, a C1-C20 aliphatic hydrocarbon group or a C3-C20 alicyclic hydrocarbon group, m 1 and m 2 independently each represents an integer of 0 to 2, m 3 represents an integer of 1 to 3, with the proviso that m 1 plus m 2 plus m 3 equals 3, and m 4 represents an integer of 1 to 3.