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
Routing of data including multimedia between electronic devices
Color stable manganese-doped phosphors
Quaternary chalcogenide wafers
Soft co-processors to provide a software service function off-load architecture in a multi-core processing environment
Bandpass filter and radio communication module and radio communication device using the same
Data storage device and block selection method for a flash memory
Wireless communication system
  Randomly Featured Patents
System and method of squeezing memory slabs empty
Circuit for duplex synchronization of asynchronous signals
Composite chew toy
Modified platelet factor-4 and cleaved platelet factor 4
Method and system for providing a handoff from a CDMA cellular telephone system
Earth moving implement
Optimus csb (installation) dispensing tool and multi-belt hoisting clamp
Connective jack
Substrate for liquid crystal display and liquid crystal display unit
SAT-based technology mapping framework