Patent ID: 8536679
Filing Date: 2013-09-17
Classification: H01L

Abstract:
1. A lateral BJT clamp for protecting a high voltage pin that is arranged adjacent another high voltage pin, comprising: at least one collector finger, at least one emitter finger, wherein an enlarged base contact island is provided across at least part of the top end of said at least one emitter finger; a base, a buried layer of the same doping type as the base, and a sinker extending downward through an epitaxial layer of the same doping type of the base, down toward the buried layer, of the same doping type as the base, wherein: wherein an embedded reverse body diode provides a current path for a reverse current flow from the at least one collector finger to the base, wherein the reverse path body diode has an increased efficiency by increasing a base-contact area of the lateral BJT, wherein the reverse path body diode has an increased efficiency by increasing a base-contact area of the lateral BJT.