Patent ID: 7989578

Claim:
A negative photosensitive polyimide polymer having a repeating unit of formula (1) as a polymerized unit: wherein G is a tetravalent organic group: Q is selected from the group consisting of: wherein each X independently is hydrogen, a halogen, a C 1 -C 4 alkyl or a C 1 -C 4 perfluoroalkyl, A is —O—, —S—, —CO—, —CH 2 —, —OC(O)— or —CONH—, m is an integer from 1 to 3, and n is 0 or 1; P* is a photosensitive group of formula (2): wherein R 1 is hydrogen or methyl, and R 2 is phenylene, or a linear or branched C 1 -C 8 alkylene, C 1 -C 8 alkenylene, C 1 -C 8 cycloalkylene, or C 1 -C 8 hydroxyalkylene.