Electrostatic recording apparatus

Details Electrostatic recording apparatus Electrostatic recording apparatus

1986-08-04

1989-06-20

Welsh, J. David

Photocopying

Contact printing

Light boxes

355210, 430 31, 430 58, 430 95, G03G 1500

Patent

active

048413283

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.

REFERENCES:
patent: 3594160 (1971-07-01), Gunto et al.
patent: 4460669 (1984-01-01), Ogawa et al.
patent: 4623243 (1986-11-01), Iijima

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