METHOD AND SYSTEM FOR A GALLIUM NITRIDE VERTICAL TRANSISTOR
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United States of America Patent
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app pub date -
May 13, 2015
filing date -
Jan 7, 2013
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Abstract
A vertical JFET includes a GaN substrate comprising a drain of the JFET and a plurality of patterned epitaxial layers coupled to the GaN substrate. A distal epitaxial layer comprises a first part of a source channel and adjacent patterned epitaxial layers are separated by a gap having a predetermined distance. The vertical JFET also includes a plurality of regrown epitaxial layers coupled to the distal epitaxial layer and disposed in at least a portion of the gap. A proximal regrown epitaxial layer comprises a second part of the source channel. The vertical JFET further includes a source contact passing through portions of a distal regrown epitaxial layer and in electrical contact with the source channel, a gate contact in electrical contact with a distal regrown epitaxial layer, and a drain contact in electrical contact with the GaN substrate.
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