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Bad column handling in flash memory

  • US 9,146,807 B2
  • Filed: 03/11/2013
  • Issued: 09/29/2015
  • Est. Priority Date: 12/04/2012
  • Status: Active Grant
First Claim
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1. A method of operating a memory array that includes at least one bad column, comprising:

  • determining location information for the at least one bad column;

    compressing the location information;

    providing the compressed location information to a soft-input ECC decoder as a first soft data indicating low likelihood for hard data obtained from the at least one bad column; and

    decoding hard data in combination with the soft data indicating low likelihood for the hard data obtained from the at least one bad column.

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