Patent ID: 8368167

Claim:
A semiconductor device, comprising: a first semiconductor layer, having a first conductivity type, wherein the first semiconductor layer is formed on a semiconductor substrate having a second conductivity type; a cathode contact region, formed in the first semiconductor layer, wherein the cathode contact region has a first conductivity type with a heavy doping concentration; a guard ring, formed in the first semiconductor layer and forming a Schottky window, wherein the guard ring comprises a guard ring interface to the first semiconductor layer, wherein the guard ring has a second conductivity type, and wherein the guard ring is coupled to a guard ring contact; a Schottky diode metal contact, coupled to the first semiconductor layer, the Schottky diode metal contact comprising a Schottky diode interface to the first semiconductor layer, wherein the Schottky diode metal contact is placed at the Schottky window and wherein the Schottky diode interface separates apart from the guard ring region; and an electrical resistance module, coupled between the Schottky diode metal contact and the guard ring.