MOS device with low injection diode
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United States of America Patent
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Jan 6, 2015
Issued Date -
N/A
app pub date -
Sep 11, 2012
filing date -
Feb 11, 2005
priority date (Note) -
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Abstract
A semiconductor device is formed on a semiconductor substrate. The device includes: a drain; an epitaxial layer overlaying the drain, wherein a drain region extends into the epitaxial layer; and an active region. The active region includes: a body disposed in the epitaxial layer, having a body top surface; a source embedded in the body, extending from the body top surface into the body; a gate trench extending into the epitaxial layer; a gate disposed in the gate trench; an active region contact trench extending through the source and into the body; and an active region contact electrode disposed within the active region contact trench. A layer of body region separates the active region contact electrode from the epitaxial layer, and a low injection diode is formed below a body/drain junction.
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