Patent ID: 7262468
Filing Date: 2007-08-28
Classification: H01L

Abstract:
1. A silicon-on-insulator semiconductor device comprising: an insulative layer formed overlying a substrate; a source region and a drain region formed in a semiconductor layer overlying the insulative layer, the source region and the drain region comprising a material having a first conductivity type; a body region in the semiconductor layer and disposed between the source region and the drain region and overlying the insulative layer, the body region comprising a material having a second conductivity type; a gate insulative layer overlying the body region; a gate region overlying the gate insulative layer; a diode circuit comprising back-to-back diodes formed in the semiconductor layer, the back-to-back diodes having two PN-junction-type diodes and having first and second end regions of the first conductivity type at two ends of the back-to-back diodes, the first end region being electrically connected to the source region; a conductive connection connecting the gate region to the second end region of the back-to-back diodes by connecting the gate region to a metallization layer above the substrate and connecting the metallization layer to the second end region; and an isolation region adjacent to and between the source region and the first end region of the back-to-back diodes, wherein the gate insulating layer is protected by the back-back diodes from damage by a plasma by exposing the back-to-back diodes to the plasma during the fabrication of the silicon-on-insulator semiconductor.