Semiconductor device and method for its fabrication

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode

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Details

257371, 257299, 257345, 257500, H01L 2702, H01L 2908

Patent

active

061112941

ABSTRACT:
A semiconductor device has a semiconductor substrate of a first conductivity type. A first well of a second conductivity type is disposed in the semiconductor substrate. A second well of the first conductivity type is disposed in the first well. A third well of the second conductivity is disposed in the second well. A MOS transistor having a source region and a drain region of the first conductivity type is disposed in the third well.

REFERENCES:
patent: 4138782 (1979-02-01), De la Moneada et al.
patent: 5321293 (1994-06-01), Mojaradi et al.
patent: 5336915 (1994-08-01), Fujita et al.
patent: 5708290 (1998-01-01), Cacciola et al.
K. Hoffmann: "VLSI-Entwurf", 2.sup.nd edition, 1993, pp. 404-405.

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