Patent ID: 10403746

Abstract:
The present document discloses an AlxGa1−xN/GaN heterostructure, wherein x is 0.10<x<0.60, preferably 0.13<x<0.40, most preferably 0.15<x<0.25. The heterostructure comprises an AlxGa1−xN layer formed directly on a GaN layer. The heterostructure presents a room temperature 2DEG mobility of 1800 to 2300 cm2/Vs, preferably 1900 to 2300 cm2/Vs, most preferably 2000 to 2300 cm2/Vs, and a pinch-off voltage which differs by 0.3 V or less, preferably by 0.25 V or less, most preferably by 0.20 V or less from a theoretical value of the pinch-off voltage, wherein the theoretical value of the pinch-off voltage is estimated based on an electrostatic band diagram obtained by XRD, of the AlxGa1−xN/GaN heterostructure.