Patent ID: 9496384
Filing Date: 2016-11-15
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first conductive-type SiC substrate; a first conductive-type SiC epitaxial layer formed on the substrate and having a gate trench; a gate insulating film formed on a side surface and a bottom surface of the gate trench; a gate electrode embedded in the gate trench; a first conductive-type source layer formed such that the source layer is formed on a first surface of the epitaxial layer to define a portion of the side surface of the gate trench; a second conductive-type channel layer formed such that the channel layer is in contact with the source layer to define a portion of the side surface of the gate trench; and a first conductive-type drift layer formed such that the drift layer is in contact with the channel layer to define the bottom surface of the gate trench, wherein on-resistance R wherein x≧600 and y≧0.25 in the relational expression (4).