Patent ID: 7294884

Claim:
A vertical power semiconductor device, comprising: a substrate including a first layer that is a first conductivity type; a first conductive region provided proximate an upper surface of the substrate, the first conductive region being a second conductivity type that is different from the first conductivity type; first and second electrodes, the first electrode being proximate the upper surface of the substrate and coupled to the first conductive region, the second electrode being proximate a lower surface of the substrate; a passivation structure including first and second dielectric layers provided over the upper surface of the substrate; one or more field plates of a first type provided between the first and second dielectric layers; an oxide layer provided between the first dielectric layer and the upper surface of the substrate; second and third conductive regions provided proximate the upper surface of the substrate, the second and third conductive regions being provided on opposing ends of the first conductive region, each of the second third conductive regions being the second conductivity type, wherein the one or more field plates of the first type includes first and second field plates, the first field plate coupling the second conductive region, the second field plate coupling the third conductive region.