Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Nonvolatile semiconductor storage device having a plurality of blocks of memory cell transistors formed on respective wells isolated from each other










Image Number 2 for United States Patent #6091632.

A plurality of blocks of memory cell transistors are formed on the respective isolated wells. In a write stage, a predetermined write-stage well voltage is applied to the well of a selected block including the memory cell transistors to be subjected to a write operation, a bias voltage is applied to the well of each of the remaining, non-selected blocks to increase a threshold voltage of the memory cell transistors of each non-selected block, in comparison with a threshold voltage determined by the predetermined write-stage well voltage, and a voltage is applied to the control gates of the memory cell transistors of each non-selected block to reduce a difference between a potential of the floating gate of each memory cell transistor of each non-selected block and a write-stage drain voltage applied to the drain of the memory cell transistor through the associated bit line such that a source-drain leak current of each memory cell transistor in the non-selected blocks falls in a permissible range.








 
 
  Recently Added Patents
Switching module and switching synchronization system
Encoding method and encoding device, decoding method and decoding device and transcoding method and transcoder for multi-object audio signals
Dynamically reconfigurable systolic array accelorators
Dye sensitised solar cell
Health monitoring of applications in a guest partition
Aggregating completion messages in a sideband interface
Motilin-like peptide compound having transmucosal absorbability imparted thereto
  Randomly Featured Patents
Evaporator
Error-correcting multi-stage code generator and decoder for communication systems having single transmitters or multiple transmitters
Impatiens plant named `Guadeloupe`
Adjustable aerodynamic system for a motor vehicle
Grinding or polishing arrangement
Underwater detection device
Combination handwheel and handwheel clutch for sewing machines
Method and system for reviewing, editing and analyzing video
Method for treating inflammation, ischemia-induced cell damage and muscular dystrophy
Installation for treatment of waste metal and liquid dross