A model of the voltage barrier in the channel of 4H-SiC normally-off JFET's

A model of the potential barrier in the channel of normally-off 4H-SiC JFET's is shown. It allows to evaluate the barrier height and the minority carrier density in the center of the channel for an arbitrary geometry and bias condition. The validity of the model is justified by comparing the model with numerical simulations carried out on various channel topologies.