Patent ID: 7893476

Claim:
A Tunnel Field Effect Transistor comprising at least one nanowire, said nanowire comprising: a source region comprising a first semiconductor material which is highly doped according to a first conductivity type; a drain region comprising the first semiconductor material which is highly doped according to a second conductivity type; a channel region comprising the first semiconductor material, which is lowly doped according to the second conductivity type, wherein the channel region is situated between the source region and drain region; a heterosection comprising a material having a different lattice constant from the first semiconductor material, wherein the heterosection is situated between the channel region and one of the source region and the drain region, wherein an interface between the heterosection and a main part of the nanowire is substantially defect-free; and a gate structure on the channel region of the nanowire, said gate structure comprising a gate dielectric, and a gate contact on top of said gate dielectric.