Patent ID: 6586817
Filing Date: 2003-07-01
Classification: H01L

Abstract:
A device comprising:a substrate having a first dopant concentration of a first conductivity type; an epitaxial layer formed on said substrate, said epitaxial layer having a second dopant concentration of said first conductivity type; source and drain regions positioned within said epitaxial layer and separated by a channel region, said source and drain regions having a second conductivity type; a gate positioned over said channel region; and a resistive path, said resistive path being positioned in said epitaxial layer and said substrate so as to couple a first location in said epitaxial layer, below said channel region, to a second location in said epitaxial layer, said resistive path having a horizontal length in said substrate, wherein; said horizontal length of said resistive path is chosen to provide a resistance between said first location and said second location in said epitaxial layer within a specific range of resistance values.