Power MOSFET having enhanced breakdown voltage

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

Reexamination Certificate

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C257S341000, C257S488000

Reexamination Certificate

active

06853033

ABSTRACT:
A MOSFET includes a dielectric, preferably in the form of a metal thick oxide that extends alongside the MOSFET's drift region. A voltage across this dielectric between its opposing sides exerts an electric field into the drift region to modulate the drift region electric field distribution so as to increase the breakdown voltage of a reverse biased semiconductor junction between the drift region and body region. This allows for higher doping of the drift region, for a given breakdown voltage when compared to conventional MOSFETs.

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