HIGH VOLTAGE FINFET STRUCTURE WITH SHAPED DRIFT REGION
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United States of America Patent
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Issued Date -
Dec 29, 2016
app pub date -
Jun 25, 2015
filing date -
Jun 25, 2015
priority date (Note) -
Abandoned
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Abstract
Devices and methods for a high voltage FinFET with a shaped drift region include a lateral diffusion metal oxide semiconductor (LDMOS) FinFET having a substrate with a top surface and a fin attached to the top surface. This fin includes a source region having a first type of doping, an undoped gate-control region adjacent the source region, a drift region adjacent the undoped gate-control region opposite the source region, and a drain region. The amount of doping of the source region is greater than the amount in the drift region. The drain region has the same type of doping and is adjacent the drift region. The fin in the drift region is tapered, being wider closest to the undoped gate-control region and thinner closest to the drain region. A gate stack is attached to the top surface of the substrate and located with the undoped gate-control region.
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