| abstract |
A salt represented by formula (I): n n n n n n n n n n wherein Q 1 and Q 2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group;n nL b1 represents a C1-C24 divalent saturated hydrocarbon group or the like;n nR 1 , R 2 , R 3 and R 4 independently in each occurrence represent a C1-C12 aliphatic hydrocarbon group, or the like; andn nA + represents an organic counter ion. |