Electrostatic recording apparatus
US4841328A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1986 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Aug 4, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic recording apparatus comprises a photosensitive drum. The photosensitive drum comprises a bulk layer of amorphous silicon formed on a support, and in the bulk layer, a first layer region is formed at the support side and a second layer region is formed at the surface side. The first layer region is formed in a manner of comprising hydrogen of 0.01-40 atomic %, oxygen of 0.1-40 atomic % and boron of 5.times.10.sup.-6 -1.0 atomic %. On the other hand, oxygen and boron are not doped virtually in the second layer region and generation of carrier traps is suppressed in this non-doped second layer region. Furthermore, the peak wavelengths of the lights irradiated onto the photosensitive drum from both a light source for exposure and light source for discharge are set shorter than 650 nm, and preferably shorter than 600 nm. Light of short wavelengths shorter than 650 nm is almost absorbed in the second layer region, and generation of carriers in the first layer region is small, and thereby capture of carriers in traps is suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.