Patent ID: 8890208
Filing Date: 2014-11-18
Classification: C23C,H01L

Abstract:
1. A semiconductor device, comprising: an epitaxial substrate for a semiconductor device, comprising, a source electrode, a drain electrode and a gate electrode formed directly on said barrier layer of the epitaxial substrate for a semiconductor device, wherein: the barrier layer has a thickness of 5 nm or less; all of the source electrode, the drain electrode and the gate electrode consist of metal elements; the composition of said first group III nitride is in a range determined by x1=0 and 0≦y1≦0.3; and the composition of said second group III nitride is, in a ternary phase diagram with InN, AlN and GaN being vertices, in a range surrounded by straight lines respectively represented by the following expressions determined in accordance with the composition of said first group III nitride: