Monitoring the threshold voltage of frequently read cells
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United States of America Patent
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Mar 20, 2007
Grant Date -
Oct 19, 2006
app pub date -
Apr 13, 2005
filing date -
Apr 13, 2005
priority date (Note) -
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Abstract
A canary cell may be used in a semiconductor memory to indicate an incipient failure. For example, the canary cell may be provided on rows in a flash memory. Before a read disturb occurs, the canary cell may first sense the condition, for example, because it may be biased with a higher drain bias and is, therefore, more susceptible to the read disturb problem.
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