Patent ID: 8669038

Claim:
A photosensitive polyimide-based polymer comprising at least one compound selected from the group consisting of compound represented by Formula 1: wherein each Z is a tetravalent organic group derived from one or more tetracarboxylic acids, including 3,4-dicarboxy-1,2,3,4-tetrahydro-6-tert-butyl-1-naphthalene succinic dianhydride (DTBDA), or derivatives thereof, a is from 1 to 150, b is from 1 to 400, Y 1 is a divalent organic group derived from a diamine and is selected from and Y 2 is a divalent aliphatic group or aromatic organic group derived from a diamine; a compound represented by Formula 2: wherein Z is as defined in Formula 1, Y 3 is selected from Y 1 and Y 2 defined in the formula 1 and combinations thereof, and c is from 5 to 200; and a compound represented by Formula 3: wherein Z is as defined in Formula 1, Y 3 is as defined in the formula 2, and d is from 5 to 200.