Myers Bigel, P.A.
Power schottky diodes having local current spreading layers and methods of forming such devices
A Schottky diode includes a drift region doped with dopants having a first conductivity type, first and second blocking junctions that are doped with dopants having a second conductivity type in an upper portion of the drift region, first and second local current spreading layers doped with dopants having the first conductivity type underneath the respective first and second blocking junctions, and first and second contacts on respective lower and upper portions of the drift region. A channel is provided in the upper portion of the drift region between the first and second blocking junctions, the channel doped with dopants having the first conductivity type and a concentration of dopants in at least a first portion of the channel being lower than the concentration of dopants in the first and second local current spreading layers.
Cree, Inc.
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Alexander Qingchun
Suvorov Zhang