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DOUBLE
POLY-SINGLE METAL CELL
( Double Poly-Two metal cell will be smaller by 10 to 15%)
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- THE CELL- TECHNICAL ADVANTAGES
- Reduced Field on Floating gate due to two sided select
gate spacing the diffusion away from FG edge
- Integrated Select/Control gate allow cells to be in depletion-
No Over Program or Over Erase issues and no Vt distribution issues
- Use of total FG area for Program/Erase reduce
stress on tunnel oxide
- Array configurable as EEPROM or Flash
- Disturbs have been designed out
- CELL_COST ADVANTAGES
- Standard Processing with minimum additional masks -4 to 5 for cell
in 0.25 microns
- Processing of NVM prior to the CMOS and Analogprocess steps ensure minimum impact on standard
device
characteristics - Standard Processing for low cost manufacture
Read about the cell and Technology
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THE ADVANTAGES MAKE THE CELL APPLICABLE IN:
o...
Automotive - High reliability, high temperature range (-40 to 125C or -55 to 150C) operation
o... Medical - Very
High reliability application
o... Industrial - High reliability, high temperature and low cost application
o...
Consumer - low cost large volume application
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PROGRAM/ERASE
OVER WIDE TEMPERATURE RANGE
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SCALING WITH TECHNOLOGY:
o... Problem for most
enbedded Non-Volatile memories due to- . .a)need for minimum number of additional steps . .b)high voltages
required . .c)punch trough problems
o... SimpleEE on the other hand scales well with technology with minimum
change in process, lower high voltage needs and no punch through effects.
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