Active solid-state devices (e.g. – transistors – solid-state diode – Regenerative type switching device – Device protection
Reexamination Certificate
2007-04-20
2009-08-18
Pham, Hoai v (Department: 2892)
Active solid-state devices (e.g., transistors, solid-state diode
Regenerative type switching device
Device protection
C257S199000, C257S603000, C257SE29335
Reexamination Certificate
active
07576370
ABSTRACT:
The present invention describes ESD apparatus, methods of forming the same, and methods of providing ESD protection. In certain aspects, the invention achieves the desired turn-on voltage and maintains low leakage in the ESD apparatus, and the methods of providing ESD protection. In one aspect, a zener diode that has a positive trigger voltage is used to quickly turn-on a transistor. In another aspect, different zener diodes that have positive and negative trigger voltages, respectively, are used to quickly turn on a transistor. In still another aspect, a linearly graded P-region is used to implement the ESD device of the present invention.
REFERENCES:
patent: 5880511 (1999-03-01), Yu et al.
patent: 6891207 (2005-05-01), Pequignot et al.
patent: 2006/0028879 (2006-02-01), Nakakuma et al.
patent: 2007/0038659 (2007-02-01), Datar et al.
Gee Harry Yue
Sharma Umesh
California Micro Devices
Pham Hoai v
Pillsbury Winthrop Shaw & Pittman LLP
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