Patent ID: 6864037

Claim:
A polymer comprising recurring units of the following general formulae (1m) and (1p): wherein R 1 and R 2 each are hydrogen, a fluorine atom or a straight, branched or cyclic alkyl or fluorinated alkyl group of 1 to 20 carbon atoms, R 3 is a fluorine atom or a straight, branched or cyclic fluorinated alkyl group of 1 to 20 carbon atoms, R 4 is an acid labile group of one of the following, formulae R 21 is a straight, branched or cyclic alkyl group of 1 to 6 carbon atoms which may contain a hetero atom, R 23 is hydrogen, hydroxyl, straight, branched or cyclic alkyl, hydroxyalkyl, alkoxyalkyl or alkoxy group of 1 to 6 carbon atoms, R 9 is hydrogen, a fluorine atom or a straight, branched or cyclic alkyl or fluorinated alkyl group of 1 to 20 carbon atoms, R 10 is a single bond or a divalent hydrocarbon group of 1 to 4 carbon atoms, R 11 and R 12 are each independently hydrogen, a fluorine atom or a straight, branched or cyclic alkyl or fluorinated alkyl group of 1 to 4 carbon atoms, at least either one of R 11 and R 12 contains at least one fluorine atom, R 13 is hydrogen, a straight, branched or cyclic alkyl group of 1 to 10 carbon atoms or an acid labile group, R 14 is hydrogen, a fluorine atom or a straight or branched alkyl or fluorinated alkyl group of 1 to 4 carbon atoms, m and p each are a number from more than 0 to less than 1, and 0<m+p≦1, e is an integer of 0 to 4, and f is an integer of 1 to 3.