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
Cellulose acylate laminate film, method for producing cellulose acylate laminate film, polarizer and liquid crystal display device
Telecommunications system and method
System and method for browsing tabbed-heterogeneous windows
Method and system for parallelizing data copy in a distributed file system
Resist composition and method for producing resist pattern
Communicating channel state information using predictive vector quantization
Nanoparticle entrapment of materials
  Randomly Featured Patents
Vacuum cleaning
Cross arm for lighting fixtures
Image information transmission system with compression based on still-image redundancy
Expression system for altered expression levels
System and method for managing distribution of content to a device
Method and device for producing synchronizer ring
Paint roller
Vehicle deceleration alert system
Data transfer processing system
Anti-reflection device for a VDT