Patent ID: 7205604

Claim:
A field effect transistor comprising: a drain region; a body region in electrical contact to said drain region comprising a first semiconductor material wherein said first semiconductor material is silicon; a source region in electrical contact to said body region and comprising a second semiconductor material, said second semiconductor material different from said first semiconductor material to form a hetero-junction with respect to said first semiconductor material; said drain region, body region and source region comprising a single crystal material; said source region of said second semiconductor material being lattice strained with respect to said first semiconductor material of said body region to provide a selected conduction and/or valence band offset; a channel region formed on said drain, body and source, said channel region comprising a third semiconductor material with respect to said first semiconductor material of said body to provide a selected lattice strain in said channel region over said body; a gate dielectric over said channel region extending from said drain region, over said body region to said source region; and a gate conducting region over said gate dielectric extending from said drain region, over said body region to said source region.