Patent ID: 8609317

Claim:
A salt represented by the formula (I—Pb): wherein X pb represents a single bond or —O—, R pb represents single bond, a C1-C10 divalent aliphatic hydrocarbon group, a C4-C36 divalent alicyclic hydrocarbon group or a C6-C36 divalent aromatic hydrocarbon group, and one or more methylene groups in the divalent aliphatic hydrocarbon group and the divalent alicyclic hydrocarbon group can be replaced by —O— or —CO—, Y pb represents a polymerizable group, Z pb+ represents a group represented by the formula (I—Pb-z2): wherein P 22 , P 23 and P 24 are independently in each occurrence substituents and any two of P 22 , P 23 and P 24 can be bonded each other to form a ring, x22 represents an integer of 0 to 5, x23 represents an integer of 0 to 4, and x24 represents an integer of 0 to 5, X pc represents a single bond or a C1-C4 alkylene group, and R pc represents a C1-C10 aliphatic hydrocarbon group which can have one or more substituents, a C4-C36 alicyclic hydrocarbon group which can have one or more substituents or a C6-C36 aromatic hydrocarbon group which can have one or more substituents, and one or more methylene groups in the divalent aliphatic hydrocarbon group and the divalent alicyclic hydrocarbon group can be replaced by —O— or —CO—.