Flash memory device and method of erasing flash memory device
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United States of America Patent
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Jul 7, 2009
Grant Date -
Jun 19, 2008
app pub date -
Nov 13, 2007
filing date -
Dec 19, 2006
priority date (Note) -
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Abstract
A flash memory device and a method of erasing memory cells in a flash memory device are provided. A first post program operation is performed on erased memory cells having a threshold voltage lower than a first program verify voltage. A second post program operation is performed on erased memory cells having a threshold voltage lower than a second program verify voltage. The second program verify voltage is lower than the first program verify voltage.
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