Process for producing a photoconductive polyimide coating upon a substrate

摘要

A photoconductive layer is produced upon a substrate by coating the substrate with a solution in an organic solvent of a polyamic acid and of 2,4,7-trinitro-9-fluorenone (TNF) and/or 2,3,4,7-tetranitro-9-fluorenone and heating the coated substrate at a temperature not exceeding 150 DEG C. to form on the substrate a polyimide coating containing the said fluorenone compound as a photosensitizer.