Patent ID: 9570560
Date: 2017-02-14
CPC Classifications: H01L

Claim:
1. An electronic device, comprising: a silicon carbide layer having a first conductivity type and including a main junction adjacent a surface of the silicon carbide layer; and a junction termination region at the surface of the silicon carbide layer adjacent the main junction and having a second conductivity type that is opposite the first conductivity type, wherein a charge in the junction termination region decreases with lateral distance from the main junction, and wherein a maximum charge in the junction termination region is less than about 2×10 wherein the charge in the junction termination region decreases smoothly with lateral distance from the main junction; wherein the junction termination region has a linearly graded doping profile that decreases in concentration laterally with distance from the main junction; and wherein a vertical depth of the junction termination region from a p-n junction between the junction termination region and an upper surface of the silicon carbide layer decreases with lateral distance from the main junction.