Patent ID: 8796737
Filing Date: 2014-08-05
Classification: H01L

Abstract:
1. A high electron mobility transistor (HEMT), comprising: a channel layer; a channel supply layer configured to induce a 2-dimensional electron gas (2DEG) in the channel layer, the channel supply layer including a first material layer and an etch stop layer, the first material layer including a recess region exposing the etch stop layer, a thickness of the channel supply layer in the recess region being less than 20 nm, and a portion of the 2DEG corresponding to the recess region does not exist due to the thickness of the channel supply layer in the recess region; a gate electrode on the recess region; and a source electrode and a drain electrode at respective sides of the gate electrode, wherein one of the etch stop layer and the first material layer is an Al the other of the etch stop layer and the first material layer is an Al