Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product
Patent
1991-09-24
1993-12-07
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
430 58, 355271, G03G 514
Patent
active
052682471
ABSTRACT:
A printing drum (An electrophotographic member) for electrophotographic copying machines comprises a substrate, a photosensitive film formed on the substrate and a protective film formed on the photosensitive film and mainly comprising carbon at no lower than 50 atom % and including hydrogen at 10 to 40 atom % and nitrogen at 1 to 10 atom %. The protective film may further include fluorine at 0 to 1 atom %. The transparency of the protective film is controlled by adjusting the concentration of hydrogen. The resistivity of the protective film is controlled by adjusting the concentration of nitrogen. By this configuration, requirements for the protective film on the hardness, the transparency and the resistivity of the protective film are satisfied at the same time.
REFERENCES:
patent: 4770966 (1988-09-01), Kazama et al.
patent: 4939056 (1990-07-01), Hotomi et al.
patent: 5059502 (1991-10-01), Kojima et al.
Goodrow John
Semiconductor Energy Laboratory Co,. Ltd.
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