Patent ID: 9252210
Filing Date: 2016-02-02
CPC Classification: H01L,Y02B

Claim Text:
1. A semiconductor device, comprising: a SiC substrate; a first conductive type SiC epitaxial layer, formed on a surface of the SiC substrate; a field insulating film, covering a portion of a surface of the first conductive type SiC epitaxial layer, wherein the surface of the first conductive type SiC epitaxial layer comprises a field region and an active region, the active region being surrounded by the field region and not covered by the field insulating film; and an electric field moderating part, positioned in a portion of the field region closer to the active region, wherein a top surface of the electric field moderating part is lower than the surface of the first conductive type SiC epitaxial layer at the active region, and wherein the electric field moderating part comprises a second conductive type layer.