Patent ID: 9127376
Filing Date: 2015-09-08
Classification: C23C,C30B,H01L

Abstract:
1. A method for manufacturing a nitride semiconductor self-supporting substrate, comprising at least: a step of preparing a nitride semiconductor self-supporting substrate serving as a seed substrate, wherein the nitride semiconductor self-supporting substrate consists essentially of nitride semiconductors; a step of epitaxially growing the same type of nitride semiconductor as the seed substrate on the seed substrate to produce an epitaxially grown substrate comprising: a step of slicing the entire epitaxially grown substrate subjected to the epitaxial growth into only two pieces in parallel to an epitaxial growth surface to produce a first nitride semiconductor self-supporting substrate comprising mainly the seed substrate portion and a second nitride semiconductor self-supporting substrate comprising mainly the epitaxial layer portion, wherein the first nitride semiconductor self-supporting substrate and the second nitride semiconductor self-supporting substrate are manufactured from the single seed substrate, and wherein a thickness of the epitaxial layer formed at the epitaxial growth step is set to 1 mm or below.