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

Claim 12:
13. A nitride semiconductor device, comprising:
a gallium nitride layer containing an element that is other than p-type impurities and n-type impurities in a first region in a first primary surface of the gallium nitride layer, a concentration of the element in the first region being higher than in any other regions in the gallium nitride layer;
a first p-type region containing a p-type impurity in the gallium nitride layer, the first p-type region being shallower than the first region in a depth direction and being within the first region in a plan view; and
a second p-type region in the gallium nitride layer, the second p-type region having said p-type impurity at a concentration lower than a concentration of said p-type impurity in the first p-type region and surrounds a bottom and sides of the first p-type region,
wherein said element is nitrogen.