Fishing – trapping – and vermin destroying
Patent
1989-06-06
1990-03-20
Hearn, Brian E.
Fishing, trapping, and vermin destroying
437 8, 437 12, 437 82, 357 48, H01L 1900
Patent
active
049101609
ABSTRACT:
A process is disclosed for forming high-performance, high voltage PNP and NPN power transistors in a conventional monolithic, planar, epitaxial PNP junction isolated integrated circuit. The process permits independently optimizing the NPN and PNP power trransitors. Where high-voltage devices are desired a field threshold adjustment implant is applied. It also includes provisions for testing critical portions of the process at appropriate points.
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Buynoski Matthew S.
Jennings Dean
Gutierrey Anthony
Hearn Brian E.
National Semiconductor Corporation
Patch Lee
Woodward Gail W.
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