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










Image Number 12 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
Cardiac chamber volume computation from contours and base plane in cardiac MR Cine images
Process for recovering and recycling an acid catalyst
Clock phase recovery apparatus
Method for specifying control curve parameters for controlling climatic environmental conditions of climate-controlled enclosed spaces
Obviation of recovery of data store consistency for application I/O errors
Controlling a video window position relative to a video camera position
Method for using extended security system, extended security system and devices
  Randomly Featured Patents
Method and apparatus for personal awareness and growth
Mechanical pencil having propelling device for a bar shaped article
Battery plate feeding and handling apparatus
PC5 as a factor IX propeptide processing enzyme
Method and pattern carrier for optimizing inspection recipe of defect inspection tool
Open frame coaster vehicle
Cable support assembly for minimizing bend radius of cables
Pattern formation method
Locking apparatus with a key
Article holder with suction cup