Patent ID: 6642579
Filing Date: 2003-11-04
Classification: H01L

Abstract:
A silicon-on-insulator field effect transistor (SOI FET) device having a body contact comprising:a pattern provided with a first coplanar to a second region, said first region forming a gate for said SOIFET, and said second region placed between the body contact and said first region; a first sub-region underneath said first region forming a channel, said first sub-region for adjusting the threshold voltage of said SOI FET; a second sub-region adjacent to said first sub-region, and a third sub-region contiguous to said second sub-region, said second sub-region placed under said second region and under a contiguous portion of said first region being provided with a first doping concentration, said second sub-region forming a low resistance extrinsic body contact region, said third sub-region having a second doping concentration, and forming the body contact region, said second region and said third sub-region having a second doping concentration which is higher than said first doping concentration in said second sub-region; and source and drain regions positioned on each side of said first sub-region.