Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
US6815135B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Dec 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/147
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In 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, the layer thickness a0 (&mgr;m) of the charge transport layer at the middle portion of the conductive support in its generatrix direction, the layer thickness b0 (&mgr;m) of the protective layer at the middle portion of the conductive support in its generatrix direction, the layer thickness a (&mgr;m) of the charge transport layer at a portion other than the middle portion and the layer thickness b (&mgr;m) of the protective layer at the portion other than the middle portion satisfy the following expression (1) in a region satisfying 0.8 (&mgr;m)≦(a0−a)≦3.0 (&mgr;m):b0×(a/a0)3≦b(&mgr;m)≦b0×(a/a0)1/4  (1).Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.