Patent ID: 9054232
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A method for fabricating an epitaxial structure, comprising: providing a substrate and a heterojunction stack over a first side of the substrate, the heterojunction stack comprising an undoped gallium nitride (GaN) layer over the first side of the substrate and a doped aluminum gallium nitride (AlGaN) layer on the undoped GaN layer; forming a GaN light emitting diode stack over a second side of the substrate, the GaN light emitting diode stack comprising an n-type GaN layer over the second side of the substrate, a GaN/indium gallium nitride (InGaN) multiple quantum well (MQW) structure over the n-type GaN layer, a p-type AlGaN layer over the GaN/InGaN MQW structure, and a p-type GaN layer over the p-type AlGaN layer, and processing the heterojunction stack to form one or more devices coupled to the light emitting diode stack, the one or more devices are chosen from the group consisting of an AlGaN/GaN heterojunction field effect transistor (HFET) and an AlGaN/GaN Schottky diode.