Patent ID: 6815135
Filing Date: 2004-11-09
Classification: G03G

Abstract:
An electrophotographic photosensitive member comprising a conductive support, and provided thereon a charge generation layer, a charge transport layer and a protective layer in this order, wherein;the layer thickness a0 (&mgr;m) of said charge transport layer at the middle portion of said conductive support in its generatrix direction, the layer thickness b0 (&mgr;m) of said protective layer at the middle portion of said conductive support in its generatrix direction, the layer thickness a (&mgr;m) of said charge transport layer at a portion other than the middle portion and the layer thickness b (&mgr;m) of said protective layer at the portion other than the middle portion satisfy the following expression (1) in a region satisfying 0.8 (&mgr;m)&lE;(a0âˆ’a)&lE;3.0 (&mgr;m): b0Ã—(a/a0)3&lE;b(&mgr;m)&lE;b0Ã—(a/a0)1/4â€ƒâ€ƒ(1). wherein said a0 (&mgr;m) is from 5 &mgr;m to 40 &mgr;m and said b0 (&mgr;m) is from 0.5 &mgr;m to 5.5 &mgr;m.