Reliability health prediction by high-stress seasoning of memory devices
AssigneeMicron Technology, Inc.
InventorsZhongguang Xu, Murong Lang, Zhenming Zhou
Life of this patent
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Abstract
An accelerated seasoning cycle criterion is associated with a memory die of a number of memory dies. The memory die is subjected to one or more accelerated seasoning conditions during accelerated seasoning cycles. Responsive to determining that the accelerated seasoning cycle criterion has been satisfied, a defect scan is performed on the memory die. The memory die is associated with a respective reliability bin of a plurality of reliability bins in view of a result of the defect scan, wherein the result of the defect scan satisfies one or more predetermined threshold reliability criteria corresponding to the respective reliability bin.
Claims20
A method, comprising:
- associating an accelerated seasoning cycle criterion with a memory die of a plurality of memory dies;
- subjecting the memory die to one or more accelerated seasoning conditions during accelerated seasoning cycles;
- responsive to determining, by a processing device, that the accelerated seasoning cycle criterion has been satisfied, performing a defect scan on the memory die;
- and
- associating, by the processing device, the memory die with a respective reliability bin of a plurality of reliability bins in view of a result of the defect scan, wherein the result of the defect scan satisfies one or more predetermined threshold reliability criteria corresponding to the respective reliability bin.
A system comprising:
- a test set up comprising a plurality of memory dies;
- and
- a processing device, operatively coupled to the plurality of memory dies, to perform screening operations for each of the plurality of memory dies, the screening operations comprising:
- predetermining a plurality of checkpoints during an accelerated seasoning test, wherein each checkpoint of the plurality of checkpoints corresponds to a cycle threshold criterion;
- determining whether a number of accelerated seasoning cycles performed on a memory die satisfies a cycle threshold criterion for a first checkpoint;
- responsive to determining that the number of accelerated seasoning cycles satisfies the cycle threshold criterion for the first checkpoint, determining an error rate associated with the memory die;
- determining whether the error rate satisfies an error threshold criterion specific to a predetermined reliability rating;
- and
- responsive to determining that the error rate satisfies the error threshold criterion, repeating the screening operations until a cycle threshold criterion for a next checkpoint is satisfied.
A non-transitory computer readable medium comprising instructions, which when executed by a processing device, cause the processing device to perform operations comprising:
- associating an accelerated seasoning cycle criterion with a memory die of a plurality of memory dies;
- subjecting the memory die to one or more accelerated seasoning conditions during accelerated seasoning cycles;
- responsive to determining, by a processing device, that the accelerated seasoning cycle criterion has been satisfied, performing a defect scan on the memory die;
- and
- associating, by the processing device, the memory die with a respective reliability bin of a plurality of reliability bins in view of a result of the defect scan, wherein the result of the defect scan satisfies one or more predetermined threshold reliability criteria corresponding to the respective reliability bin.
Dependencies are inferred from the claim text.