Low stress, high resolution photosensitive polyimide based on a BPDA/ PDA/6FDAm copolymer

A novel series of BPDA/PDA/6FDAm polyimide copolymers have been developed. These materials are more flexible, soluble, and more optically transparent than the homopolymer BPDA/PDA. A negative acting PSPI exhibits high resolution. 6 μm lines can be delineated in a 19 μm thick film. In addition, the PSPI exhibits high performance mechanical/physical properties such as a low CTE, low stress, and high elongation at break.