Patent ID: 9613810
Date: 2017-04-04
CPC Classifications: H01L

Claim:
1. A method for fabricating a silicon carbide (SiC) device, comprising: forming a thin epitaxial layer of a nitrogen doped SiC material on a SiC epitaxial layer formed on a SiC substrate; and thermally growing an oxide layer to form an insulator material on the nitrogen doped SiC epitaxial layer, wherein the thermally growing the oxide layer results in at least partially consuming the nitrogen doped SiC epitaxial layer in the oxide layer to produce an interface including nitrogen between the nitrogen doped SiC epitaxial layer and the oxide layer to create in the interface a spatial variation of a nitrogen concentration that decreases in distance from the nitrogen-doped SiC epitaxial layer below the interface to the oxide layer above the interface.