Patent ID: 6975015

Claim:
A structure including: a substrate having a top surface, said substrate of a first dopant type; a first semiconductor layer in said substrate, said first semiconductor layer having a top surface extending parallel to said top surface of said substrate, said first layer of a second dopant type; and a second semiconductor layer of said first dopant type, said second semiconductor layer having a top surface coextensive with said top surface of said substrate, a bottom surface of said second layer in direct physical contact with said top surface of said first layer, said second layer electrically modulated by said first layer; a source and a drain of said first dopant type in said second layer and a gate formed on said top surface of said substrate and aligned to said source and said drain; a first vertical bipolar transistor comprising said source, said second semiconductor layer and said semiconductor layer; and a second vertical bipolar transistor comprising said drain, said second semiconductor layer and said first semiconductor layer; and a third semiconductor layer of said second dopant type a bottom surface of said third semiconductor layer in direct physical contact with said top surface of said first semiconductor layer and extending in a direction perpendicular to said top surface of said substrate into said second semiconductor layer, said second layer further electrically modulated by said third semiconductor layer.