Bridge circuitry comprising series connection of vertical and la

Details Bridge circuitry comprising series connection of vertical and la Bridge circuitry comprising series connection of vertical and la

1997-02-07

1998-10-06

Hoang, Huan

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327423, 257122, 257124, H03K 1756

Patent

active

058182829

ABSTRACT:
A field relaxation region of the second conductivity type is formed between the base region and a drain electrode contact portion at which the drain region contacts with a drain electrode but distanced from both the base region and the drain electrode contact portion and the field relaxation region is also separated via the drain region from the laterally extending portion of the semiconductor isolation region to form a drain current channel region between the field relaxation region and the laterally extending portion of the semiconductor isolation region and further the field relaxation region is electrically connected via an interconnection to the source region and the vertically extending portion of the semiconductor isolation region so that the field relaxation region and the semiconductor isolation region have the same potential as the source region whereby if the lateral MOS field effect transistor is reverse-biased by a voltage, then a first space charge region is formed which extend from a first p-n junction surface between the laterally extending portion of the semiconductor isolation region and the drain current channel region of the drain region toward the drain current channel region and a second space charge region is formed which extend from a second p-n junction surface between the field relaxation region and the drain current channel region of the drain region toward the drain current channel region for causing the first and second space charge regions to contact with each other to pinch the drain current channel region off.

REFERENCES:
patent: 4760434 (1988-07-01), Tsuzuki et al.
patent: 5464993 (1995-11-01), Zambrano et al.
patent: 5608235 (1997-03-01), Pezzani

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