Patent ID: 8564022

Claim:
A power device, comprising: a substrate; a semi-insulating gallium nitride (GaN) layer formed on the substrate; an aluminum (Al)-doped GaN layer formed on the semi-insulating GaN layer; a first nitride layer formed on the (Al)-doped GaN layer; wherein the first nitrade layer comprises a material of Empirical Formula 1: Al X In Y Ga 1-X N(0.1 ≦x≦ 1 and 0 ≦y≦ 0.3); [Empirical Formula 1] a second nitride layer formed on the first nitrade layer; wherein the second nitrade layer comprises the same material as the first layer nitrade layer; a source electrode pattern and a drain electrode pattern formed on the first nitride layer; and a gate electrode pattern formed on the second nitride layer.