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ELECTROPHOTOCHEMICAL PREPARATION OF SELENIUM PHOTOCONDUCTIVE MEMBERS

IP.com Disclosure Number: IPCOM000023488D
Original Publication Date: 1977-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 253K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method for forming an electrophotographic imaging member wherein amorphous selenium is cathodically deposited on a conducting substrate from a selenious acid electrolyte while the substrate is simultaneously illuminated with a periodic spatially modulated pattern of electromagnetic radiation with-in the absorption band of selenium, In operation the sub-strate is arranged as the cathode in an electrodeposition cell filled with the electrolyte and a constant current supplied by a D.C. energy source is passed through the electrolyte while the substrate is illuminated as described, The selenium layer thus formed on the substrate has a periodically varying thick-ness which corresponds to the periodic spatially modulated pattern of radiation, Any suitable conductive substrate may be employed; preferably the substrate is one that forms a blocking contact with selenium, e.g., gold or nickel. Either surface of the substrate may be illuminated depending upon, of course, the characteristics of the substrate. Where the sub-strate is substantially transparent, it is preferred to illuminate the substrate from the rear. Where the substrate is opaque, the illumination must be directed upon the sub-

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XEROX DISCLOSURE JOURNAL -~

ELECTROPHOTOCHEMICAL PREPARATION Proposed Classification
OF SELENIUM PHOTOCONDUCTIVE U.S. Cl. 96/1.5
MEMBERS mt. Cl, G03g 5/04
Aleksandar Damjanovic
Michael L. Hair
Anthony T. Ward

A method for forming an electrophotographic imaging member
wherein amorphous selenium is cathodically deposited on a

conducting substrate from a selenious acid electrolyte while
the substrate is simultaneously illuminated with a periodic
spatially modulated pattern of electromagnetic radiation with-
in the absorption band of selenium, In operation the sub-
strate is arranged as the cathode in an electrodeposition cell
filled with the electrolyte and a constant current supplied by
a D.C. energy source is passed through the electrolyte while
the substrate is illuminated as described, The selenium layer
thus formed on the substrate has a periodically varying thick-
ness which corresponds to the periodic spatially modulated
pattern of radiation, Any suitable conductive substrate may
be employed; preferably the substrate is one that forms a
blocking contact with selenium, e.g., gold or nickel. Either
surface of the substrate may be illuminated depending upon, of
course, the characteristics of the substrate. Where the sub-
strate is substantially transparent, it is preferred to
illuminate the substrate from the rear. Where the substrate
is opaque, the illumination must be directed upon the sub-

strate through the electrolyte. The pattern of illumination
may be provided by directing the a...