Active solid-state devices (e.g. – transistors – solid-state diode – Regenerative type switching device – Combined with field effect transistor
Reexamination Certificate
2005-03-01
2005-03-01
Cao, Phat X. (Department: 2814)
Active solid-state devices (e.g., transistors, solid-state diode
Regenerative type switching device
Combined with field effect transistor
C257S135000
Reexamination Certificate
active
06861678
ABSTRACT:
We disclose the structure of a JFET device, the method of making the device and the operation of the device. The device is built near the top of a substrate. It has a buried layer that is electrically communicable to a drain terminal. It has a body region above the buried layer. A portion of the body region contacts a gate region connected to a gate terminal. The device has a channel region, of which the length spans the distance between the buried layer and a source region, which projects upward from the channel region and is connected to a source terminal. The device current flows in the channel substantially perpendicularly to the top surface of the substrate.
REFERENCES:
patent: 6008520 (1999-12-01), Darwish et al.
patent: 6084254 (2000-07-01), Kim
Pending U.S. Application No. 10/614,840 (TI-35193) Howard et al. “Implant-Controlled-Channel Vertical JFET”.
Pending U.S. Application No. 10/678,028 (TI-33654), Pendharker et all “A Low Noise Vertical Variable Gate Control Voltage JFET Device in a BICMOS Process & Methods to Build this Device”.
Howard Gregory E.
Swanson Leland S.
Brady III Wade James
Cao Phat X.
Doan Theresa T.
Tung Yingsheng
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