Detection of memory cells that are stuck in a physical state
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United States of America Patent
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Aug 11, 2015
Grant Date -
Sep 18, 2014
app pub date -
Mar 15, 2013
filing date -
Mar 15, 2013
priority date (Note) -
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Abstract
A method for detecting memory cells that are stuck in a physical state. The method includes performing a diagnostic read of a memory cell in a memory system. The memory system is configured to utilize at least one read threshold value to determine a read data value stored in the memory cell when performing a data read operation on the memory cell. Performing the diagnostic read includes: comparing a measurement property of the memory cell to at least one diagnostic threshold value, where at least one of the diagnostic threshold values is different from all of the read threshold values; and identifying the memory cell as being stuck in a physical state based on the comparing. Based on identifying the memory cell as being stuck in a physical state, an indication that memory cell is stuck is output along with a diagnostic data value associated with the physical state.
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