Patent ID: 9673315
Date: 2017-06-06
CPC Classifications: H01L

Claim:
1. A semiconductor device, comprising: a SiC layer comprising a first plane; an insulating layer; and a region between the first plane and the insulating layer, the region comprising at least one element selected from the group consisting of Be (beryllium), Mg (magnesium), Cu (calcium) Sr (strontium) and Ba (barium), a full width at half maximum of a concentration peak of the element being equal to or less than 1 nm, and when a first area density being an area density of Si (silicon) and C (carbon) including a bond which does not bond with any of Si and C in the SiC layer at the first plane and a second area density being an area density of the element, the second area density being equal to or less than ½ of the first area density.