Patent ID: 7271453

Claim:
A semiconductor structure, comprising: a semiconductor layer; first and second source/drain regions on the semiconductor layer, wherein the first and second source/drain regions each comprise dopants of a first doping polarity; a semiconductor channel region disposed between the first and second source/drain regions; a semiconductor buried well region in direct physical contact with the semiconductor channel region, wherein the semiconductor buried well region comprises dopants of a second doping polarity opposite to the first doping polarity, wherein said dopants of the second doping polarity of the semiconductor buried well region have a doping concentration higher than that of the semiconductor layer, and wherein the semiconductor buried well region is on and in direct physical contact with the semiconductor layer; and a buried barrier region being disposed between the semiconductor buried well region and the first source/drain region and being disposed between the semiconductor buried well region and the second source/drain region, wherein the buried barrier region is adapted for preventing leakage current between the semiconductor buried well region and the first source/drain region and between the semiconductor buried well region and the second source/drain region.