Patent ID: 8569769

Claim:
A High Electron Mobility Transistor (HEMT), comprising: a channel layer including a 2-Dimensional Electron Gas (2DEG); a barrier layer configured to induce the 2DEG in the channel layer, the barrier layer including a recess region, the barrier layer including a first barrier layer on the channel layer and a second barrier layer on the first barrier layer; source and drain electrodes on the barrier layer; a depletion layer on the barrier layer between the source and drain electrodes, the depletion layer covering a surface of the barrier layer in the recess region and extending onto a region of the barrier layer outside the recess region, the depletion layer including at least one of a GaN layer, an InN layer, an AlGaN layer, an AlInN layer, an InGaN layer and an AlInGaN layer; and a gate electrode on the depletion layer in the recess region, wherein a polarization rate of the second barrier layer is greater than a polarization rate of the first barrier layer.