SALT AND PHOTORESIST COMPOSITION CONTAINING THE SAME

摘要

A salt represented by the formula (a1): wherein Q1 and Q2 each independently represent a fluorine atom or a C1-C4 perfluoroalkyl group, X1 represents —CO—O—Xa1— or —CH2—O—Xa2— wherein Xa1 and Xa2 independently each represent a C1-C15 alkylene group and one or more —CH2— in the alkylene group can be replaced by —O— or —CO—, Y1 represents a C3-C36 alicyclic hydrocarbon group or a C6-C24 aromatic hydrocarbon group, and the alicyclic hydrocarbon group and the aromatic hydrocarbon group can have one or more substituents, and one or more —CH2— in the alicyclic hydrocarbon group can be replaced by —O— or —CO—, and Z+ represents an organic cation.