POLYIMIDE-POLYBENZOXAZOLE PRECURSOR SOLUTION, POLYIMIDE-POLYBENZOXAZOLE FILMS, AND PROCESS FOR PRODUCING THEREOF

摘要

The present invention relates to a polyimide-polybenzoxazole precursor solution, a polyimide-polybenzoxazole film, and a preparation method thereof, wherein the film prepared by the polyimide-polybenzoxazole precursor solution of the present invention includes diamine and A film formed by copolymerizing dianhydride, diaminophenol, and dicarbonyl chloride unit structure in an organic solvent, and maintains the colorless and transparent properties of a conventional polyimide film, improves heat resistance, and has the advantage of having a lower birefringence.