Patent ID: 7084227

Claim:
A photosensitive polymer comprising: a first monomer selected from the group consisting of norbornene having C 1 to C 12 aliphatic alcohol as a substituent, norbornene carboxylic acid, norbornene having a C 1 to C 12 aliphatic hydrocarbon group with carboxylic anhydride group pendent thereto as a substituent; a second monomer which is maleic anhydride; and a third monomer selected from the group consisting of norbornene ester having a C 6 to C 20 aliphatic hydrocarbon group as a substituent and (meth)acrylate having a C 6 to C 20 aliphatic hydrocarbon group as a substituent; and wherein the weight average molecular weight of the polymer is in the range of 3,000 to 100,000.