Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Set of three level concurrent word line bias conditions for a nor type flash memory array










Image Number 19 for United States Patent #6620682.

In the present invention a method is shown that uses three concurrent word line voltages in memory cell operations of an a NOR type EEPROM flash memory array. A first concurrent word line voltage controls the operation on a selected word line within a selected memory block. The second concurrent word line voltage inhibits cells on non selected word lines in the selected memory block, and the third concurrent word line voltage inhibits non-selected cells in non-selected blocks from disturb conditions. In addition the three consecutive word line voltages allow a block to be erased, pages within the block to be verified as erased, and pages within the block to be inhibited from further erasure. The three consecutive voltages also allow for the detection of over erasure of cells, correction on a page basis, and verification that the threshold voltage of the corrected cells are above an over erase value but below an erased value. The methods described herein produce a cell threshold voltage that has a narrow voltage distribution.








 
 
  Recently Added Patents
Information processing apparatus, information outputting method and computer program storage device
Flexible organic light emitting device and manufacturing method thereof
Device for identifying types of document files
Vehicle headlight
System and method of supplying an electrical system with direct current
Intelligent and automated code deployment
Timing controller capable of removing surge signal and display apparatus including the same
  Randomly Featured Patents
Facsimile machine for use in combination with PC
Counterbalanced arm assembly
Hybrid optical and electrical fiber optic link linearizer
Process and apparatus for producing evaporated phosphor sheets and an evaporated phosphor sheet produced by means of such process and apparatus
Machine and method for separating recyclable matter
Data encoder for producing and storing info runlength value, bit length values and encoded words from input data values
Electrophotographic photoreceptor, and image forming method, image forming apparatus and process cartridge therefor using the photoreceptor
Taste masking of ibuprofen by fluid bed coating
Passenger tire with low bead apex volume
Method and system for color filter array multifactor interpolation