PNP punchthrough-assisted protection device for special applicat

Active solid-state devices (e.g. – transistors – solid-state diode – Regenerative type switching device – Having only two terminals and no control electrode – e.g.,...

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Details

257362, 257546, H01L 2906, H01L 2990

Patent

active

054931339

ABSTRACT:
A protection circuit (40) providing positive and negative stress protection. A lateral PIN (58) assists in the triggering of a silicon-controlled rectifier (60) for positive stress protection. A vertical PNP (62) provides negative stress protection. A Schottky diode 64 may be used for biasing a n-well (44) to prevent latchup.

REFERENCES:
patent: 4602267 (1986-07-01), Shirato
patent: 5077591 (1991-12-01), Chen et al.
patent: 5223737 (1993-06-01), Canclini

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