Patent ID: 8963151
Filing Date: 2015-02-24
Classification: H01L

Abstract:
1. A heterostructure field effect transistor (HFET) comprising: a substrate; a semi-insulating gallium nitride (GaN) layer formed on the substrate; an aluminum gallium nitride (AlGaN) layer formed on the GaN layer; and a silicon carbide (Si x C 1-x ) functional layer formed on the AlGaN layer, wherein x of the Si x C 1-x functional layer has a value in a range of 0.6<x<1, and wherein the Si x C 1-x functional layer is disposed to cover an entire surface of the AlGaN layer and is in physical contact with the AlGaN layer, and further comprising at least two electrodes formed on the substrate, the at least two electrodes being spaced apart in a direction transverse to a thickness direction of the substrate wherein the Si x C 1-x functional layer is arranged between the substrate and at least a portion of each of the at least two electrodes in the thickness direction.