Protective circuit for protecting contacts of monolithic integra

Details Protective circuit for protecting contacts of monolithic integra Protective circuit for protecting contacts of monolithic integra

1992-10-02

1994-07-05

Ngo, Ngan

Active solid-state devices (e.g., transistors, solid-state diode

Regenerative type switching device

Device protection

257357, 257362, 361 91, 361101, 361111, H01L 2974, H01L 2906, H01L 2978

Patent

active

053269942

ABSTRACT:
A protective circuit for connecting contacts of monolithic integrated circuits, particularly CMOS input/output stages. The protective circuit has a four-layer device (ta, ts) with a defined switching threshold in the area of each connecting contact (A) and a low-resistivity current path (sa) from the connecting contact (A) to a supply terminal (VSS, VDD). The protective circuit also contains devices (zw2, z5) which prevent or provide a bypass for any undesired flow of current (i3, i4) between at least parts of the four-layer device and triggerable circuit regions (W2).

REFERENCES:
patent: 4633283 (1986-12-01), Avery
patent: 4694315 (1987-09-01), Svedberg
patent: 4870530 (1989-09-01), Hurst et al.
patent: 4939616 (1990-07-01), Rountree
patent: 5012317 (1991-04-01), Rountre

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