Patent ID: 8629428
Filing Date: 2014-01-14
Classification: B82Y,H01L

Abstract:
1. A tunnel field effect transistor comprising: a source-channel-drain structure comprising a doped source region, a doped drain region, a channel region situated between the source region and the drain region, a source-channel interface, and a drain-channel interface, wherein the doped source region comprises a first source sub-region which is doped with a first doping profile with a dopant element of a first doping type and which has a first peak concentration, the doped source region further comprising a second source sub-region close to the source-channel interface which is doped with a second doping profile with a second dopant element with the same doping type as the first dopant element and which has a second peak concentration, and wherein the doped source region comprises an interface between the first source sub-region and the second source sub-region, wherein the second peak concentration of the second doping profile is substantially higher than a maximum doping level of the first doping profile at or close to the interface between the first source sub-region and the second source sub-region; a gate electrode which covers at least a part of the source region along a longitudinal direction of the source region such that there is no coverage by the gate electrode of the channel region or the drain region; a gate dielectric along the longitudinal direction of the source region, wherein the gate dielectric is situated between the gate electrode and the source region.