Patent ID: 8174089
Filing Date: 2012-05-08
Classification: C30B,H01L

Abstract:
1. A microelectronic device structure, comprising: (a) a foreign substrate; (b) a nucleation buffer layer overlying said foreign substrate; (c) a first gallium nitride layer overlying said nucleation buffer layer, said first GaN layer having a dopant concentration of not more than about 1×10 (d) a second, conductive gallium nitride layer overlying said first gallium nitride layer; (e) a third gallium nitride layer overlying said second, conductive gallium nitride layer, said third gallium nitride layer having a dopant concentration of not more than about 1×10 (f) at least one metal contact over said third gallium nitride layer, forming a metal-to-semiconductor junction therewith.