ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC IMAGE FORMING DEVICE PROVIDED WITH THE SAME, AND PROCESS CARTRIDGE

摘要

PROBLEM TO BE SOLVED: To obtain an electrophotographic photoreceptor which prevents its dielectric breakdown due to a flaw which occurs in the photoreceptor in a transfer step and reaches the electric charge transferring layer and a recess in the electric charge generating layer, suppresses the occurrence of black spots in the white ground part of an image and retains high image quality over a long period of time and to obtain an electrophotographic image forming device with the photoreceptor, and a process cartridge detachably attached to the device. SOLUTION: At least an electric charge generating layer, an electric charge transferring layer and an electric charge injecting layer are successively laminated to obtain the objective electrophotographic photoreceptor applied to an injection electrifying process. The Universal hardness HU of the electric charge transferring layer in a physical property test of a surface coating in a certain environment (22.5 deg.C/50% RH) is >=200 [N/mm2].