| abstract |
A salt represented by the formula (I0): 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, L 1 represents a divalent C1-C17 hydrocarbon group in which one or more —CH 2 — can be replaced by —O— or —CO—, m represents 1 or 2, and Z m+ represents m-valent organic or inorganic cation. |