Amorphous selenium coating
AssigneeAddressograph Multigraph Corporation
InventorNorman Carlile Miller
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Abstract
A photoconductive coating having an improved charge acceptance is produced by vacuum evaporation of amorphous selenium in the presence of an inert gas.
Claims11
A process for depositing a layer of photoconductive amorphous selenium upon a substrate which comprises evaporating amorphous selenium at a temperature in the range of about from 170.degree. to 250.degree. C. at a pressure in the range of about from 1x 10.sup.-4 torr to 6 .times. 10.sup.-2 torr, introducing an inert gas into an evacuated system having a pressure in the range of about from 1x 10.sup.-7 torr to 1x 10.sup.-6 torr, thus scattering said amorphous selenium and condensing amorphous selenium upon the entire surface of said substrate, the charge acceptance of the resulting selenium layer being in the range of about from 1/5 to 1/3 of the dielectric breakdown voltage.
A photoconductive selenium coated substrate produced by a process which comprises evaporating amorphous selenium at a temperature in the range of about from 170.degree. to 250.degree. C. at a pressure in the range of about from 1x 10.sup.-4 torr to 6 .times. 10.sup.-2 torr, introducing an inert gas into an evacuated system having a pressure in the range of about from 1x 10.sup.-7 torr to 1 .times. 10.sup.-6 torr, thus scattering said amorphous selenium and condensing amorphous selenium upon the entire surface of said substrate, the charge acceptance of the resulting selenium layer being in the range of about from 1/5 to 1/3 of the dielectric breakdown voltage.
Dependencies are inferred from the claim text.