Patent ID: 7095092
Filing Date: 2006-08-22
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a substrate of a first conductivity type; an anode of the first conductivity type, the anode including a plurality of dopant concentrations, wherein the dopant concentration of a first portion is on an order of magnitude higher than the dopant concentration of a second portion, wherein neither the first portion or the second portion are used to make an ohmic contact; a cathode of a second conductivity type different from the first conductivity type, the anode being disposed adjacent the cathode and forming an anode/cathode junction interface; a conductive isolation feature of the second conductivity type, wherein the conductive isolation feature includes a buried layer and a conductive vertical portion conductively coupled to the buried layer, wherein the buried layer is disposed between the substrate and a region of the anode and cathode, and wherein the conductive vertical portion surrounds the region of the anode and cathode from sides of the region, and wherein the conductive isolation feature forms a junction with the substrate; and a dielectric isolation region disposed within a portion of the semiconductor device between a top of the anode and a top of the conductive vertical portion of the conductive isolation feature.