Low voltage triggering semiconductor controlled rectifiers

Electricity: electrical systems and devices – Safety and protection of systems and devices – Impedance insertion

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361 91, 257357, H02H 904

Patent

active

054651891

ABSTRACT:
A new semiconductor controlled rectifier which may be used to provide on-chip protection against ESD stress applied at the input, output, power supply pins or between any arbitrary pair of pins of an integrated circuit is disclosed. The structure which has the lowest breakdown voltage for a given technology is incorporated into the SCR enabling a SCR trigger voltage determined by the lowest breakdown-structure.

REFERENCES:
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patent: 5072268 (1991-12-01), Rumennik
patent: 5225702 (1993-06-01), Chatterjee
L. R. Avery, "Using SCR's as Transient Protection Structures in Integrated Circuits", RCA DSRC, pp. 177-180.
A Process-Tolerant Input Protection Circuit for Advanced CMOS Processes, written by Rountree, et al., 1988 EOS/ESD Symposium, pp. 201-205.

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