Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product
Patent
1996-05-24
1998-11-24
Chapman, Mark
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
430 66, G03G 1504
Patent
active
058404554
ABSTRACT:
An electrophotographic photoconductor, having a conductive supporting substrate, a photoconductive layer disposed thereon, and a surface protective layer formed on the photoconductive layer, with the surface protective layer being made of hydrogenated diamond-like carbon or hydrogenated amorphous carbon and containing at least one additional element selected from the group consisting of nitrogen, fluorine, boron, phosphorus, chlorine, bromine and iodine, with the atomic ratio of total additional elements to carbon in the surface protective layer being smaller in close proximity to the photoconductive layer than in the remainder of the surface protective layer, and having a Knoop hardness of more than or equal to 1000 kg/mm.sup.2 in the outermost portion of the surface protective layer is provided which has improved resistance against peeling and scratch, and is thus capable of forming electrophotographic images of high quality for repeated use over an extended period of time.
REFERENCES:
patent: 5059502 (1991-10-01), Kojima et al.
patent: 5168023 (1992-12-01), Mitani et al.
patent: 5452061 (1995-09-01), Kojima et al.
patent: 5525447 (1996-06-01), Ikuno et al.
Ikuno Hiroshi
Kojima Narihito
Nagame Hiroshi
Chapman Mark
Ricoh & Company, Ltd.
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