Patent ID: 7728356
Filing Date: 2010-06-01
Classification: H01L

Abstract:
1. A nitride based enhancement mode High Electron Mobility Transistor (HEMT), comprising: (a) a III-nitride channel layer having a channel potential energy for containing a two dimensional electron gas (2DEG), wherein the 2DEG has a resistance; (b) a III-nitride barrier layer positioned for, and having a barrier potential energy for, confining the 2DEG in the channel layer, wherein a polarization coefficient of the barrier layer is larger than a polarization coefficient of the channel layer; (c) a III-nitride interlayer between the barrier layer and the channel layer, wherein the III-nitride interlayer has a polarization coefficient higher than the polarization coefficient of the barrier layer; (d) a source for supplying a current to the 2DEG; (e) a drain for supplying an output current, wherein the current flows from the source, through the 2DEG and then to the drain to produce the output current; (f) a gate for controlling the current's flow through the 2DEG; and (g) a p-type III-nitride layer between the III-nitride barrier layer and the gate for depleting the 2DEG under the gate at zero bias.