Electrostatic discharge protective device incorporating silicon controlled rectifier devices
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 21, 2003
Grant Date -
Sep 26, 2002
app pub date -
Mar 20, 2000
filing date -
Mar 20, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An SCR cell structure provides a plurality of divided p+ and n+ blocks, and varies the spacing, sizes and locations of these divided p+ and n+ blocks to minimize latchup caused by non-ESD events. To further minimize latchup caused by non-ESD events, the SCR cell structure can also provide a plurality of divided blocks of Nwell and Psub pickup contacts, and varying the spacing, sizes, shapes and locations of these divided blocks of Nwell and Psub pickup contacts. In addition, the spacing of contact holes within the pickup contacts can also be varied to further minimize latchup caused by non-ESD events.
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