Patent ID: 9570438
Date: 2017-02-14
CPC Classifications: H01L

Claim:
1. A semiconductor device, comprising: a semiconductor body comprising a first lateral surface and a second lateral surface opposite the first lateral surface; a first device region extending to the second lateral surface, and comprising: a drift region of a first conductivity type, and a drift current control region of a second conductivity type that is opposite the first conductivity type, the drift current control region being spaced apart from the second lateral surface by the drift region; a second device region extending to the first lateral surface, and comprising: a barrier layer, and a buffer layer having a different band gap than the barrier layer and a two-dimensional charge carrier gas channel at an interface between the buffer layer and the barrier layer; an electrically conductive substrate contact forming a low ohmic connection between the two-dimensional charge carrier gas channel and the drift region; and a gate structure being configured to control a conduction state of the two-dimensional charge carrier gas, wherein the drift current control region is configured to block a vertical current in the drift region via a space-charge region that arises at a p-n junction between the drift current control region and the drift region.