Patent ID: 7646026

Claim:
An integrated vertical SiC—PN power diode, comprising: a highly doped SiC semiconductor body of a first conductivity type; a lightly-doped drift zone of the first conductivity type formed at an emitter end above said semiconductor body; an emitter zone of a second conductivity type formed on said drift zone; at least one thin intermediate layer of the first conductivity type disposed inside said drift zone, said intermediate layer having a higher doping concentration compared with said drift zone and dividing said drift zone into at least one first, anode-end drift zone layer and at least one second, cathode-end drift zone layer, and a space-charge region capable of extending into said drift zone at said first anode-end drift zone from a transition between said emitter zone and said drift zone when a blocking voltage is applied to said transition, said intermediate layer laying outside of said space-charge region when said blocking voltage is present.