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SELECTIVE CONDUCTIVE PHOTORECEPTOR INTERFACE OR OVERCOATING

IP.com Disclosure Number: IPCOM000023459D
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 267K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to an electrostatographic photosensi-tive device which is designed to render it suitable for charging by contacting it with a source of potential in the intermediate range, e.g., 100 to 1000 volts. Normal electro-statographic plates are not readily charged by conductive contact, partly because it is usually difficult to accomplish contact charge injection from a conductor into an insulator, and partly because local corona discharge between the insula-tor and the charging roller tends to give erratic charge deposition.

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XEROX DISCLOSURE JOURNAL

SELECTIVE CONDUCTIVE PHOTORECEPTOR Proposed Classification
INTERFACE OR OVERCOATING U.S. Cl. 96/1
John B. Wells mt. Cl. G03g

This disclosure relates to an electrostatographic photosensi-
tive device which is designed to render it suitable for
charging by contacting it with a source of potential in the
intermediate range, e.g., 100 to 1000 volts. Normal electro-
statographic plates are not readily charged by conductive
contact, partly because it is usually difficult to accomplish
contact charge injection from a conductor into an insulator,
and partly because local corona discharge between the insula-
tor and the charging roller tends to give erratic charge
deposition.

In the presently disclosed device, a low melting plastic, such
as low molecular weight polyethylene (M.P. 125°C), is coated
on a suitable substrate such as aluminum or paper, and a thin
particulate layer of copper is vacuum deposited on the plastic
to form isolated conductive (anistropic) islands. Because
there is no lateral conductivity, charges are not easily lost
for resolution purposes but the plate can discharge vertically
to prevent charge buildup. Other conductive materials can be
used under the proper conditions for particular particles,
e.g., gold, silver, etc. A photoresist can be, imaged and
removed in selective areas. The removed photoresist areas
expose the copper particles which can be converted by halogen
(Cl, Br or I), particularly iodine, to form a particular
conductive pattern. The...