Patent ID: 11873578
Assignee: SUMITOMO CHEMICAL COMPANY LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC C  H | IPC C  H

Claim 8:
9. The method for manufacturing a nitride semiconductor substrate according claim 1,
wherein, in the first step,
a plurality of valleys and a plurality of peaks are formed in the surface of the first layer as a result of the plurality of recessed portions being generated in the top surface of the single crystal and the (0001) plane disappearing, and
when an arbitrary cross section that is perpendicular to a main surface of the base substrate is observed, an average distance between a pair of peaks spaced apart from each other in a direction extending along the main surface is 1 μm or more, the pair of peaks being closest to each other among the plurality of peaks with one of the plurality of valleys sandwiched therebetween.