Patent ID: 8263472

Claim:
A method of forming a semiconductor structure including an electrostatic discharge (ESD) protect diode, the method comprising: forming an buried insulator layer on a bulk substrate of a first polarity type; forming an active semiconductor layer having a shallow trench isolation region and a diffusion region of the first polarity type on top of the buried insulator layer; forming a band region of a second polarity type within the bulk substrate and directly beneath the buried insulator layer to form a conductive path; forming a well region of the second polarity type in the bulk substrate and in contact with the band region; etching a deep trench through the active semiconductor layer, the buried insulator layer and the well region; blocking oxide formation within the deep trench; filling the deep trench with a conductive material of the first polarity type, and defining the ESD protect diode at a junction between a lower portion of the deep trench and the well region.