Patent ID: 6949615

Claim:
A monomer containing an electron-withdrawing group, represented by following Formula (b) or (c): wherein A 2 , and A 3 are each a ring; R a , R b , R c , and R u are the same or different and are each a hydrogen atom or an organic group; at least one of R t and R w1 , and at least one of the two R w2 s are each an electron-withdrawing group, and the others are each a hydrogen atom or an organic group; W 1 is a single bond or a linkage group; and n denotes an integer of from 2 to 25, where at least two of R a , R b , R c , R t , R u , R w1 , R w2 , W 1 , carbon atoms constituting ring A 2 , and carbon atoms constituting ring A 3 may be combined to form a ring, respectively.