Patent ID: 9018673
Filing Date: 2015-04-28
Classification: H01L

Abstract:
1. A diode, comprising: an anode region extending from an upper surface of a substrate to a first depth, the anode region having a first conductivity type and a first doping concentration; a cathode region of a second conductivity type underlying the anode region and extending to a second depth and having a second doping concentration, wherein the anode region and the cathode region form a sub-surface, latitudinal Zener junction; an anode contact region of the first conductivity type adjacent to the anode region and extending from the upper surface to a third depth and having a third doping concentration, wherein the third doping concentration is greater than the first doping concentration and a lateral edge of the cathode region forms a longitudinal p-n junction with the anode contact region; and a cathode contact region of the second conductivity type extending from the upper surface to a fourth depth and having a fourth doping concentration, wherein the fourth doping concentration is greater than the second doping concentration and the cathode contact region is in electrical continuity with the cathode region.