Patent ID: 7148540
Filing Date: 2006-12-12
Classification: H01L

Abstract:
1. A metal-oxide-semiconductor (MOS) device, comprising: a semiconductor layer of a first conductivity type; a source region of a second conductivity type formed in the semiconductor layer; a drain region of the second conductivity type formed in the semiconductor layer and spaced apart from the source region; a drift region formed in the semiconductor layer proximate an upper surface of the semiconductor layer and between the source and drain regions; an insulating layer formed on at least a portion of the upper surface of the semiconductor layer and above at least a portion of the drift region; a gate formed on the insulating layer and at least partially between the source and drain regions; and a conductive structure comprising a first end formed on the insulating layer and spaced apart from the gate, and a second end formed on the insulating layer and extending laterally toward the drain region, the first and second ends of the conductive structure formed above at least a portion of the drift region, at least a portion of the conductive structure being formed above the gate so as to overlap at least a portion of the gate; wherein the conductive structure is configured such that a distance between a lower surface of the first end of the conductive structure and an upper surface of the drift region is less than a distance between a lower surface of the second end of the conductive structure and the upper surface of the drift region.