Patent ID: 8563203
Filing Date: 2013-10-22
Classification: G03G

Abstract:
1. An electrophotographic photosensitive member comprising a cylindrical substrate and a photoconductive layer provided on the cylindrical substrate and formed of amorphous silicon containing hydrogen atoms, wherein when an average value of a content ratio of the hydrogen atoms to a sum of silicon atoms and the hydrogen atoms in a central portion area of the photoconductive layer in a cylindrically axial direction thereof is denoted by Hx_ave [atom %], a content ratio of the hydrogen atoms to the sum of the silicon atoms and the hydrogen atoms at an arbitrary point in the central portion area is denoted by Hx [atom %], an average value of a content ratio of the hydrogen atoms to the sum of the silicon atoms and the hydrogen atoms in an end area of the photoconductive layer in the cylindrically axial direction thereof is denoted by Hy_ave [atom %], and a content ratio of the hydrogen atoms to the sum of the silicon atoms and the hydrogen atoms at an arbitrary point in the end area is denoted by Hy [atom %], and wherein the Hx_ave, Hx, Hy_ave and Hy satisfy Expressions 1 to 4: