Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Substrate backgate for trigate FET










Image Number 13 for United States Patent #7411252.

Disclosed is a tri-gate field effect transistor with a back gate and the associated methods of forming the transistor. Specifically, a back gate is incorporated into a lower portion of a fin. A tri-gate structure is formed on the fin and is electrically isolated from the back gate. The back gate can be used to control the threshold voltage of the FET. In one embodiment the back gate extends to an n-well in a p-type silicon substrate. A contact to the n-well allows electrical voltage to be applied to the back gate. A diode created between the n-well and p-substrate isolates the current flowing through the n-well from other devices on the substrate so that the back gate can be independently biased. In another embodiment the back gate extends to n-type polysilicon layer on an insulator layer on a p-type silicon substrate. A contact to the n-type polysilicon layer allows electrical voltage to be applied to the back gate. A trench isolation structure extending through the polysilicon layer to the insulator layer isolates current flowing through the polysilicon layer from other devices on the silicon substrate.








 
 
  Recently Added Patents
Security authentication method, apparatus, and system
Cleaning device, and image forming apparatus, process cartridge, and intermediate transfer unit each including the cleaning device
Magnetic detection of small entities
Fabricated leaf tea products
Granulated sweetening composition
Washing machine
System for and method of providing single sign-on (SSO) capability in an application publishing environment
  Randomly Featured Patents
Electrophotographic photoreceptor, and image forming apparatus and process cartridge using the electrophotographic photoreceptor
Miniaturized television tuner and television receiver including the same
Method for protecting a semiconductor device against degradation, a semiconductor device protected against hot charge carriers and a manufacturing method therefor
Process and apparatus for contactless measurement of sample temperature
Bicycle frame
Back pack frame
Roof truss fabrication method
Movable display sign
Metal-gate high-k reference structure
Stent graft with improved proximal end