Patent ID: 7564072

Claim:
A semiconductor device comprising: a semiconductor substrate; an n-type SiC drift layer formed in said semiconductor substrate; an electrode formed on said semiconductor substrate to come into Schottky contact with said n-type SiC drift layer; and a p-type Junction Termination Extension region formed in an upper portion of said n-type SiC drift layer under an edge of said electrode which is in contact with said semiconductor substrate, wherein said Junction Termination Extension region consisting only of: a first p-type zone connected to said edge; and a second p-type zone formed outside said first p-type zone, having a lower charge level than said first p-type zone, said second p-type zone being provided 15 μm or more outwardly away from said edge, said first p-type zone has a charge level ranging from 1.8×10 13 to 4×10 13 cm −2 , and said second p-type zone has a charge level ranging from 1×10 13 to 2.5×10 13 cm −2 .