Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Non-volatile semiconductor memory










Image Number 2 for United States Patent #5962890.

A non-volatile semiconductor memory in which a plurality of flash memory cells are arranged in a matrix, each flash memory cell including source and drain regions formed on a silicon substrate, a floating gate formed on at least a part of the source and drain regions with a dielectric film provided therebetween, and a control gate formed on the floating gate with a dielectric layer provided therebetween, wherein a writing operation is performed by applying a positive voltage to the drain region and a negative voltage to the control gate and extracting electrons from the floating gate to the drain region by an FN tunnel current, a common source line for connecting the source region of the flash memory cells includes a diffusion layer formed in the silicon substrate and a silicide formed on the diffusion layer, and impurity concentration of the source region and the common source line are set lower than the impurity concentration of the drain region.








 
 
  Recently Added Patents
Prevention and treatment of oxidative stress disorders by gluthathione and phase II detoxification enzymes
Modular authoring and visualization of rules using trees
Metal colloidal particles, metal colloid and use of metal colloid
Database caching utilizing asynchronous log-based replication
Systems and methods for sensing external magnetic fields in implantable medical devices
Systems and methods for universal enhanced log-in, identity document verification and dedicated survey participation
Audio and music data transmission medium and transmission protocol
  Randomly Featured Patents
Ultrasonic washing machine for tableware
Spreading device and adjustable grading system incorporating same
Load carrier
Fan spider
X-ray detector array
Paring apparatus with pivotable paring head
Data processor and memory read active control method
Electronic currency, electronic wallet therefor and electronic payment systems employing them
Apparatus for cutting scrap strip
Fiber-optic reed switch