Patent ID: 9711354
Date: 2017-07-18
CPC Classifications: C30B,H01L,Y10T

Claim:
1. A method of separating a substrate from an epitaxial layer of a template for growing a semiconductor device, the method comprising: forming a mask pattern having a masking portion and an opening portion over a growth substrate, the mask pattern including a growth stop layer and an etching layer disposed over the growth stop layer and the growth substrate including a nitride substrate; forming a seed layer over a bottom surface of the opening portion to include a lower seed layer disposed in the opening portion and an upper seed layer disposed over the lower seed layer and partially covering an upper surface of the masking portion; forming at least one trench by removing the etching layer such that the growth stop layer remains on at least a portion of a bottom surface of the trench; after forming of the at least one trench, increasing a size of the trench by removing a portion of the upper seed layer; forming an epitaxial layer by growing the seed layer as a seed, the forming of the epitaxial layer including forming a void in at least a part of the trench; and separating the growth substrate from the epitaxial layer.