Patent ID: 8901699

Claim:
A diode comprising: a silicon carbide drift region; a Schottky contact on the silicon carbide drift region and forming a Schottky junction with the silicon carbide drift region; and a silicon carbide junction barrier region disposed within the silicon carbide drift region of the diode, the silicon carbide junction barrier region comprising: a plurality of first regions of silicon carbide having respective first doping concentrations in the silicon carbide drift region of the diode; and a plurality of second regions of silicon carbide in the silicon carbide drift region and disposed between the plurality of first regions of silicon carbide and the Schottky contact of the diode and in electrical contact with the plurality of first regions of silicon carbide and the Schottky contact so that the plurality of first regions of silicon carbide are spaced apart from the Schottky contact by the plurality of second regions of silicon carbide, the plurality of second regions of silicon carbide having respective second doping concentrations that are less than the first doping concentrations and forming resistive ohmic contacts with the Schottky contact, wherein the second regions of silicon carbide have a surface doping concentration at the resistive ohmic contacts of from 10 17 cm −3 to about 5×10 18 cm −3 ; and the silicon carbide drift region has a first conductivity type opposite a second conductivity type of the first regions and the second regions; wherein the plurality of first and second regions define a junction barrier grid that is configured to shield the Schottky junction when a reverse bias is applied to the diode.