Patent ID: 8120139
Filing Date: 2012-02-21
Classification: H01L

Abstract:
1. An isolation structure for a III-nitride device, comprising: a base layer having insulative properties and a planar top surface; a first III-nitride layer overlying the planar top surface of the base layer; a second III-nitride conductive layer overlying the planar top surface of the base layer and disposed lateral to the first III-nitride layer; a III-nitride semiconductor device atop the second III-nitride conductive layer; and an isolation void disposed between the first III-nitride layer and the second III-nitride conductive layer; a portion of the planar top surface under the first III-nitride layer and the second III-nitride conductive layer comprising a bottom of the isolation void, wherein the void is formed using a dopant selective etch, and wherein the base layer is comprised of a material selected from a group consisting of GaN, Si, SiC, and Sapphire.