Data Storage In Analog Memory Cell Arrays Having Erase Failures
First Claim
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1. A method for data storage, comprising:
- performing an erasure operation on a group of analog memory cells;
identifying as erase-failed cells one or more of the memory cells in the group that failed the erasure operation;
modifying, responsively to the identified erase-failed cells, a storage configuration that is used for programming the analog memory cells in the group; and
storing data in the group of the analog memory cells using the modified storage configuration.
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Abstract
A method for data storage includes performing an erasure operation on a group of analog memory cells (32). One or more of the memory cells in the group, which failed the erasure operation, are identified as erase-failed cells. A storage configuration that is used for programming the analog memory cells in the group is modified responsively to the identified erase-failed cells. Data is stored in the group of the analog memory cells using the modified storage configuration.
175 Citations
38 Claims
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1. A method for data storage, comprising:
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performing an erasure operation on a group of analog memory cells; identifying as erase-failed cells one or more of the memory cells in the group that failed the erasure operation; modifying, responsively to the identified erase-failed cells, a storage configuration that is used for programming the analog memory cells in the group; and storing data in the group of the analog memory cells using the modified storage configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Apparatus for data storage, comprising:
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an interface, which is operative to communicate with a memory device that includes a plurality of analog memory cells; and circuitry, which is coupled to perform an erasure operation on a group of the analog memory cells, to identify as erase-failed cells one or more of the memory cells in the group that failed the erasure operation, to modify, responsively to the identified erase-failed cells, a storage configuration that is used for programming the analog memory cells in the group, and to store data in the group of the analog memory cells using the modified storage configuration. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. Apparatus for data storage, comprising:
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a memory device, which comprises a plurality of analog memory cells; and a processor, which is coupled to perform an erasure operation on a group of the analog memory cells, to identify as erase-failed cells one or more of the memory cells in the group that failed the erasure operation, to modify, responsively to the identified erase-failed cells, a storage configuration that is used for programming the analog memory cells, and to store data in the group of the analog memory cells using the modified storage configuration.
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38. A memory device, comprising:
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a plurality of analog memory cells; and Read/Write (R/W) circuitry, which is coupled to perform an erasure operation on a group of the analog memory cells, to identify as erase-failed one or more of the memory cells in the group that failed the erasure operation, and to report information regarding the identified erase-failed cells to a controller external to the memory device, so as to enable the controller to store data in the group of the analog memory cells.
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Specification