Patent ID: 8933465
Filing Date: 2015-01-13
Classification: H01L

Abstract:
1. A semiconductor device comprising: an n-type SiC substrate having first face and second face; an n-type SiC layer formed on a first face side of the SiC substrate; a p-type first SiC region formed in a surface of the SiC layer, the first SiC region containing a p-type impurity and an n-type impurity, the p-type impurity being an element A and the n-type impurity being an element D, the element A and the element D forming at least a first combination or a second combination, the first combination being a combination of the element A selected from a group consisting of Al (aluminum), Ga (gallium), and In (indium) and the element D being N (nitrogen), the second combination being a combination of the element A being B (boron) and the element D being P (phosphorus), a ratio of a concentration of the element D to a concentration of the element A forming the at least one of the combinations being higher than 0.33 but lower than 0.995, the concentration of the element A forming part of the at least one of the combinations being not lower than 1×10 a first electrode formed on the SiC layer and the first SiC region; and a second electrode formed on a second face side of the SiC substrate.