Patent ID: 6100549
Filing Date: 2000-08-08
Classification: H01L

Abstract:
A high breakdown voltage HFET comprising:a substrate;a reduced surface field layer positioned on the substrate, the reduced surface field layer having a first conductivity;a channel layer positioned on the reduced surface field layer, the channel layer having a second conductivity;a barrier layer positioned on the channel layer to form an interface therebetween, the barrier layer cooperating with the channel layer to form a lateral channel adjacent to and parallel with the interface;a gate electrode positioned on the barrier layer overlying the lateral channel;a drain electrode positioned on the channel layer in contact with the lateral channel and spaced to one side of the gate electrode a distance determining the breakdown voltage; anda source electrode positioned on the channel layer in contact with the lateral channel and spaced to an opposite side of the gate electrode, the source electrode also being in contact with the reduced surface field layer.