Patent ID: 8334192
Filing Date: 2012-12-18
Classification: C30B,H01L

Abstract:
1. A method of fabricating a gallium nitride (GaN) substrate, the method comprising: a first step of preparing a base substrate; a second step of growing a nitride embedding layer on the base substrate at a first temperature, the nitride embedding layer having a plurality of indium-rich parts; a third step of growing a GaN layer on the nitride embedding layer; and a void forming step of applying a second temperature higher than the first temperature to the nitride embedding layer so that the plurality of indium-rich parts is metalized to form a plurality of voids in the nitride embedding layer, wherein the first step, the second step and the third step are carried out in the order named, the void forming step is carried out after the second step, and the GaN layer is grown at the second temperature so that the third step and the void forming step are carried out at the same time.