Browse Prior Art Database

MOS TRANSISTOR PROTECTION

IP.com Disclosure Number: IPCOM000022808D
Original Publication Date: 1976-Feb-29
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 182K

Publishing Venue

Xerox Disclosure Journal

Abstract

MOS Transistors and Integrated Circuits are normally shipped and handled with shorting rings or ioops of bare wire which tie all the device leads together to prevent static dis~ charges from entering the device and destroying it. This ring must be removed before use,

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

MOS TRANSISTOR PROTECTION
R, F. Buchheit

Proposed Classifications
TJ,S. Cl. 357/41
mt. ci. 11011 27/02

FUSE

ELEMENT

Volume 1 Number 2 February 1976 107

ZENER DIODE

MOS Transistors and Integrated Circuits are normally shipped
and handled with shorting rings or ioops of bare wire which
tie all the device leads together to prevent static dis~
charges from entering the device and destroying it. This
ring must be removed before use,

To provide temporary protection, a combination fuse and
zener diode element is wired from the leads to be protected
to the case. The fuse element is chosen so that it can be
removed by the application of a low voltage high current
source, The clearing voltage would be too low to harm
the MOS device and the clearing current would be higher
than that of a static discharge. The zener diode allows
a small change in input voltage for pretesting of the MOS.

[This page contains 1 picture or other non-text object]

Page 2 of 2

108 XEROX DISCLOSURE JOURNAL

Volume 1 Number 2 February 1976

[This page contains 1 picture or other non-text object]