Patent ID: 8872235

Claim:
A transistor device, comprising: a compound semiconductor material on a semiconductor carrier; a source region and a drain region spaced apart from each other in the compound semiconductor material with a channel region interposed between the source and drain regions; a Schottky diode integrated with the semiconductor carrier and connected in parallel between the source and drain regions; a layer of metallization on a side of the semiconductor carrier facing away from the compound semiconductor material; and wherein the Schottky diode comprises contacts extending from the source and drain regions through the compound semiconductor material, wherein a first one of the contacts directly contacts the layer of metallization and a second one of the contacts terminates so that the metallization is spaced apart from the second contact by a portion of the semiconductor carrier, wherein the portion of the semiconductor carrier that separates the second contact from the layer of metallization has a single doping type, and wherein the second contact is in ohmic contact with the semiconductor carrier.