Low-voltage triggered PNP for ESD protection in mixed...

Details Low-voltage triggered PNP for ESD protection in mixed... Low-voltage triggered PNP for ESD protection in mixed...

2006-04-04

2006-04-04

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S091100

Reexamination Certificate

active

07023676

ABSTRACT:
An low-voltage triggered PNP device for input signals with voltage level larger than VDD or less than VSS. The ESD protection device provides an ESD path from a first to a second node for protection of an internal circuit. The device comprises a substrate of a first conductivity type coupled to the first node, a first doped region of a second conductivity type in the substrate, wherein the first doped region is floated, a second doped region of the first conductivity type in the first doped region coupled to the second node, and a third doped region in the substrate, adjacent to the first doped region, to have a low trigger voltage.

REFERENCES:
patent: 6610262 (2003-08-01), Peng et al.
patent: 6642088 (2003-11-01), Yu
patent: 6724592 (2004-04-01), Tong et al.
patent: 6838908 (2005-01-01), Ker et al.

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