×

Data recovery methods in multi-state memory after program fail

  • US 7,345,928 B2
  • Filed: 12/14/2005
  • Issued: 03/18/2008
  • Est. Priority Date: 12/14/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method of operating a non-volatile memory, comprising:

  • performing a program operation on one or more non-volatile memory cells to write a corresponding target data state to each of said memory cells, said program operation including maintaining verify data indicating whether each of said memory cells has been written to its respective target data state in one or more data latches corresponding to each of said memory cells;

    determining whether the program operation has failed to successfully verify one or more of said memory cells as written to its target data state; and

    in response to determining that the program operation has failed, performing a data recovery operation, the data recovery operation including;

    performing one or more sensing operations on said memory cells; and

    logically combining the results of the said sensing operations with the verify data maintained in said memory latches to recover the corresponding target data state of each of said memory cells.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×