Patent ID: 7189493

Claim:
A polymer, comprising: a repeating unit represented by the following general formula (1a), and any one of repeating units represented by the following formula (e-1), (e-2) and (e-3), and a repeating unit represented by a following general formula (1c-1), wherein R 1 represents a hydrogen atom, a methyl group or —CH 2 CO 2 R 14 , R 2 represents a hydrogen atom, a methyl group or —CO 2 R 14 , R 3 represents a linear, branched or cyclic alkyl group having 1–8 carbon atoms or an aryl group having 6–20 carbon atoms which may be substituted, R 4 to R 9 , R 12 and R 13 each independently represents a hydrogen atom or a monovalent hydrocarbon group having 1–15 carbon atoms which may contain a hetero atom, R 10 and R 11 represent a hydrogen atom, any one or more of R 4 and R 5 , R 6 and R 8 , R 6 and R 9 , R 7 and R 9 , R 7 and R 13 , R 8 and R 12 , R 10 and R 11 , and R 11 and R 12 may form a ring together, in which case they represent a divalent hydrocarbon group having 1–15 carbon atoms which may contain a hetero atom, any one or more of R 4 and R 13 , R 10 and R 13 , and R 6 and R 8 which bond to adjacent carbon atoms may directly bond to each other to form a double bond, R 14 represents a hydrogen atom, a linear, branched or cyclic alkyl group having 1–15 carbon atoms, the general formula (1a) may represent an enantiomer, represents a hydrogen atom, a methyl group, or —CH 2 CO 2 R 14 , R 24 represents a hydrogen atom, a methyl group, or —CO 2 R 14 , represents a single bond or a linear or branched alkylene group having 1–4 carbon atoms, R 25 represents a fluorine atom or trifluoromethyl group, R 26 represents a hydrogen atom or an acid labile group, R 29 and R 30 each represents a fluorine atom or a hydrogen atom, X 1 is any one of a single bond, a methylene group, an ethylene group, an oxygen atom, and a sulfur atom, represents —O— or —C(═O)—O—, and a and c fall within the range that 0.1≦a≦0.8, and 0<c≦0.8.