ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MATERIAL, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC DEVICDE

摘要

To provide an electrophotographic photosensitive member which keeps the member surface from being scratched in a size causative of faulty images, without relying on improving mechanical strength and can form good images over a long period of time, and a process cartridge and an electrophotographic apparatus, having the photosensitive member. In an electrophotographic photosensitive member having a support and a photosensitive layer, the photosensitive member has a surface having a plurality of independent, depressed portions each having a major-axis diameter of 0.1 µm to 10 µm, a minor-axis diameter of 0.1 µm to 10 µm and a deepest-part to opening distance of 0.1 µm to 10 µm; and, where the surface is equally divided into 4 regions in the rotational direction, which are then equally divided into 25 regions in the direction falling at right angles with the rotational direction, to obtain 100-spot regions A in total, and, in each thereof, square regions B of 50 µm each per side one side of which is parallel to the rotational direction are provided and the regions B are each equally divided into 500 zones by straight lines parallel to the rotational direction, 400 to 499 lines among the straight lines pass through the depressed portions in each of the regions B.