Patent ID: 7820730

Claim:
A copolymer of a photosensitive polymer and a perfluoropolyether derivative of Formula 1 or 2 below: A-CF 2 O(CF 2 CF 2 O) m (CF 2 O) n CF 2 -A (1) wherein each A is a functional group selected from the group consisting of COF, SiX 1 X 2 X 3 (in which X 1 , X 2 and X 3 may be each independently a C 1 -C 10 alkyl or C 1 -C 10 alkoxy group, with the proviso that one or two of X 1 , X 2 and X 3 may be C 1 -C 10 alkoxy groups), silanol, chlorosilane, phosphoric acid and derivatives thereof, m is from about 1 to about 50, and n is from about 1 to about 50; or CF 3 O(CF 2 CF 2 O) m (CF 2 O) n CF 2 -A (2) wherein A, m and n are as defined in Formula 1.