Patent ID: 11862686
Assignee: FUJI ELECTRIC CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for manufacturing a nitride semiconductor device, comprising:
selectively ion-implanting an element that is other than p-type impurities and n-type impurities into a first region in a first primary surface of a gallium nitride layer so as to generate crystal defects in the first region, a concentration of said element being non-zero and substantially constant from the first primary surface to a prescribed depth in a depth direction in the first region, said concentration of the element being higher than in any other regions in the gallium nitride layer;
selectively ion-implanting a p-type impurity into a second region in the gallium nitride layer, the second region being shallower than the first region in a depth direction and being within the first region in a plan view; and
thermally treating said gallium nitride layer that has been ion-implanted with said element and said p-type impurity so as to thermally diffuse said p-type impurity in the second region into a third region that is within the first region and that surrounds a bottom and sides of the second region, the third region having said p-type impurity at a concentration lower than a concentration of said p-type impurity in the second region and being deeper than the second region.