Patent ID: 8294203
Filing Date: 2012-10-23
Classification: H01L

Abstract:
1. A semiconductor structure, comprising: a substrate, a first buried layer of a first conductivity type disposed within the substrate; a second buried layer of a second conductivity type disposed within the substrate and space apart from the first buried layer; and a first deep trench disposed in the substrate between the first buried layer and the second buried layer; wherein the first deep trench has dielectric liner layer disposed on an inner surface thereof; a third buried layer of the first conductivity type disposed in the substrate, the third buried contact spaced apart from the second buried layer; a second deep trench disposed between the second buried layer and the third buried layer, wherein wherein the first deep trench extends into a deep buried layer, and a filling of material in the first deep trench extends through the bottom of the first deep trench so as make electrical contact with the deep buried layer.