Patent ID: 8080851
Filing Date: 2011-12-20
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a bulk substrate of a first polarity type; a buried insulator layer disposed on the bulk substrate; an active semiconductor layer disposed on top of the buried insulator layer including a shallow trench isolation region and a diffusion region of the first polarity; a band region of a second polarity type disposed directly beneath the buried insulator layer and forming a conductive path; a well region of the second polarity type disposed in the bulk substrate and in contact with the band region; a deep trench filled with a conductive material of the first polarity type disposed within the well region, the deep trench beginning at a top surface of the active semiconductor layer, extending completely through the buried insulator layer and the band region, and into the well region; and an electrostatic discharge (ESD) protect diode defined by a junction between a lower portion of the deep trench and the well region.