Patent ID: 9379230
Filing Date: 2016-06-28
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor crystal substrate, the method comprising: forming a protection layer with a material including AN on a surface of a substrate, the substrate being made of any one of silicon, sapphire, silicon carbide, and gallium nitride, the protection layer including an outer peripheral area at an outer peripheral part of the substrate and an internal area surrounded by the outer peripheral area; implanting oxygen in the outer peripheral area of the protection layer; heating the substrate in which the oxygen is implanted in the outer peripheral area of the protection layer at a temperature so that the internal area of the protection layer is crystallized and the outer peripheral area of the protection layer after the substrate is heated remains in an amorphous state; and forming an amorphous-state semiconductor layer on the outer peripheral area of the protection layer and a crystallized semiconductor layer on the internal area of the protection layer, wherein the implanting of the oxygen in the outer peripheral area includes forming a mask layer on the protection layer in the internal area, radiating oxygen plasma on or ion-implanting oxygen in a surface of the protection layer on which the mask layer is formed in the internal area to implant the oxygen in the outer peripheral area of the protection layer, and removing the mask layer.