Method for forming III-nitrides semiconductor epilayer on the semiconductor substrate

Abstract

GaN layer on semiconductor substrate is grown by using GaN nanorod buffer layer. Firstly, semiconductor substrate is cleaned and thermally degassed to remove the contaminant in the growth chamber. After the above step, the GaN nanorods layer is grown under the N-rich condition. Then, GaN epilayer is overgrown on the GaN nanorods layer under the Ga-rich condition for forming Group of III-Nitrides semiconductor layer on the semiconductor substrate.