Planar triple-implanted JFET
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United States of America Patent
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May 16, 2017
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app pub date -
Oct 21, 2015
filing date -
Oct 21, 2015
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Abstract
A JFET is formed with vertical and horizontal elements made from a high band-gap semiconductor material such as silicon carbide via triple implantation of a substrate comprising an upper drift region and a lower drain region, the triple implantation forming a lower gate, a horizontal channel, and an upper gate, in a portion of the drift region. A source region may be formed through a portion of the top gate, and the top and bottom gates are connected. A vertical channel region is formed adjacent to the planar JFET region and extending through the top gate, horizontal channel, and bottom gate to connect to the drift, such that the lower gate modulates the vertical channel as well as the horizontal channel, and current from the sources flows first through the horizontal channel and then through the vertical channel into the drift.
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