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
Methods and apparatus for low power out-of-band communications
Electric washing machine
Systems and methods for identifying similar documents
Visual processing apparatus and visual processing method
Multi-user remote health monitoring system with biometrics support
Method and system for facilitating micropayments in a financial transaction system
Radio link monitoring (RLM) and reference signal received power (RSRP) measurement for heterogeneous networks
  Randomly Featured Patents
Pharmaceutical composition containing diltiazem and angiotensin-converting enzyme inhibitor
Gemstone
Composition for powder coating
Over cabinet single hook
Method and composition for using organic, plant-derived, oil-extracted materials in two-cycle oil additives for reduced emissions
Aqueous metal cleaner
Asphalt drum mixer with curved scoop-like mixing tips
Process for purifying aluminum with sodium
Blood sampling apparatus
Door lock