Patent ID: 8772097

Claim:
A method for fabricating a field effect transistor, comprising: forming a first source/drain region and a second source/drain region in a substrate; forming a channel region between the first source/drain region and the second source/drain region; forming a gate region on the channel region; forming micro-cavities in the substrate below the channel region and laterally between the first source/drain region and the second source/drain region; oxidizing the micro-cavities to form discontinuous, oxidized micro-cavities below the channel region and laterally between the first source/drain region and the second source/drain region; and doping the first source/drain region and the second source/drain region after the micro-cavities are oxidized, to thereby form a field effect transistor comprising the discontinuous, oxidized micro-cavities below the channel region and laterally between the first source/drain region and the second source/drain region.