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PHOTORECEPTOR DARK CURRENT LEAKAGE DETECTOR

IP.com Disclosure Number: IPCOM000023009D
Original Publication Date: 1976-Jun-30
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 233K

Publishing Venue

Xerox Disclosure Journal

Abstract

Selenium materials such as used for xerographic machines can be very sensitive to temperature changes. Much of the sen~ sitivity is due to increased dark current leakage through the photoreceptor material which is generally exponential with increases in temperature. The ideal photoreceptor, among other properties, should exhibit zero dark current.

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XEROX DISCLOSURE JOURNAL

PHOTORECEPTOR DARK CURRENT Proposed Classification

LEAKAGE DETECTOR U.S. Cl. 355/17
C. D, Wilson mt. Cl. G03g 13/00

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2. 4

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Selenium materials such as used for xerographic machines can

be very sensitive to temperature changes. Much of the sen~
sitivity is due to increased dark current leakage through
the photoreceptor material which is generally exponential
with increases in temperature. The ideal photoreceptor,
among other properties, should exhibit zero dark current.

To monitor the dark leakage current of a particular photo-
receptor, a small section of the subject photoreceptor con-

sisting of base or substrate (1), selenium (2) and interface
(3), can either be cut from the photoreceptor or manufactured
simultaneously with the photoreceptor. Positive and negative

terminals (4, 5) are attached by suitable means such as con-
ductive epoxy binder to the base (1) and selenium (2). Once

formed, the device looks like a two terminal diode. To utilize
the device to monitor dark current with respect to temperature,
a voltage (8) is placed across the terminals (4, 5) With

the device in the dark, the current through the device
divided by the area of the device yields a measure of the

photoreceptor~s sensitivity. By comparing the value obtained
for different temperatures, the photoreceptor~s sensitivity
to temperature change can be determined.

PIG.! PIG. 2

Volume 1 Number 6 June 1976 91

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92 XER...