Patent ID: 7906269

Claim:
A fluorine-containing polymer compound comprising: a first repeating unit represented by formula (a-1), wherein R 3 represents a fluorine atom or fluorine-containing alkyl group, W represents a bivalent linking group, each of R 4 , R 5 and R 6 independently represents a hydrogen atom, fluorine atom or monovalent organic group, and at least two of R 4 , R 5 , R 6 and W may be combined to form a cyclic structure, and a second repeating unit represented by formula (a-2), wherein R 2 represents an acid-labile protecting group, W 1 represents a bivalent linking group, each of R 4 , R 5 and R 6 independently represents a hydrogen atom, fluorine atom or monovalent organic group, and at least two of R 4 , R 5 , R 6 and W 1 may be combined to form a cyclic structure, wherein the fluorine-containing polymer compound has a weight-average molecular weight of 1,000 to 1,000,000, wherein the first repeating unit has a structure obtained by cleavage of a polymerizable double-bond of a compound selected from the group consisting of the following compounds, and wherein R 3 represents a fluorine atom or trifluoromethyl group, R 7 represents a hydrogen atom or a straight-chain, branched or cyclic alkyl or fluoroalkyl group, R 8 represents a straight-chain, branched or cyclic alkyl or fluoroalkyl group, and R 7 and R 8 may be combined to form a ring.