Patent ID: 8120115

Claim:
A tunnel field effect transistor (TFET) comprising: a source-channel-drain structure comprising at least one doped source region, at least one doped drain region, and at least one channel region situated between the source region and the drain region and forming a source-channel interface with the source region and a drain-channel interface with the drain region, wherein the doped source region and the doped drain region are oppositely doped; and a gate electrode which covers at least part of the source region, the gate electrode at least extending up to the source-channel interface such that there is a finite distance between the end of the gate electrode and the plane of the channel-drain interface and such that there is no coverage by the gate electrode of the drain region and such that a section of the channel region which is not covered by the gate electrode is not bypassed by a parallel conductive path to the drain.