Patent ID: 7005703
Filing Date: 2006-02-28
Classification: H01L

Abstract:
1. A metal-oxide-semiconductor (MOS) device, comprising: a semiconductor layer comprising a substrate of a first conductivity type and a second layer of a second conductivity type formed on at least a portion of the substrate; a first source/drain region of the second conductivity type formed in the second layer proximate an upper surface of the second layer; a second source/drain region of the second conductivity type formed in the second layer proximate the upper surface of the second layer and spaced laterally from the first source/drain region; a gate formed above the second layer proximate the upper surface of the second layer and at least partially between the first and second source/drain regions; and at least one electrically conductive trench formed in the second layer between the gate and the second source/drain region, the at least one trench being formed proximate the upper surface of the semiconductor layer and extending substantially vertically through the second layer to the substrate; wherein the at least one trench comprises an insulating material substantially lining sidewalls forming the trench, the trench being substantially filled with an electrically conductive material.