IP Library › Granted Patent US 11,495,309
Granted Patent B2
US 11,495,309 · App. 17/123,997 · Granted Nov 8, 2022

Initiating media management operation using voltage distribution metrics in memory system

Inventors: Vamsi Pavan Rayaprolu (San Jose, CA); Christopher M. Smitchger (Garden City, ID)
Assignee: MICRON TECHNOLOGY, INC.
G11C16/3431G11C16/04G11C16/0483G11C16/107G11C16/24G11C16/26G11C16/3404G11C16/3459
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Quick Facts
Patent No.
US 11,495,309
App. No.
17/123,997
Granted
Nov 8, 2022
Kind
B2
Abstract

Systems and methods are disclosed including a memory device and a processing device operatively coupled to the memory device. The processing device can perform operations including determining a voltage distribution metric associated with a at least part of a block of the memory device; determining a threshold value for the voltage distribution metric associated with the block; and responsive to determining that the voltage distribution metric exceeds the threshold value, performing a media management operation with respect to the block.

Claims (34)

1. A system comprising:

a memory device; and

a processing device, operatively coupled to the memory device, to perform operations comprising:

determining a value of a data state metric associated with data stored on a part of a block of the memory device;

responsive to the value of the data state metric satisfying a first threshold criterion, determining a first voltage distribution metric associated with at least the part of the block, wherein a voltage distribution metric reflects one of a voltage distribution margin, a voltage distribution floor, or a voltage distribution center;

responsive to determining that the first voltage distribution metric satisfies a second threshold criterion, determining a second voltage distribution metric associated with the at least part of the block; and

responsive to determining that the second voltage distribution metric satisfies a third threshold criterion, performing a media management operation to relocate the data to a new block of the memory device.

2. The system of claim 1 , wherein a threshold criterion for the voltage distribution metric is based on a deterioration slope associated with a die.

3. The system of claim 1 , wherein a threshold criterion for the voltage distribution metric is based on an error rate property associated with a wordline group (WLG).

4. The system of claim 1 , wherein the voltage distribution metric is determined using a vectorized read level calibration (vRLC) procedure.

5. The system of claim 1 , wherein the processing device to perform further operations comprising:

performing another media management operation with respect to the block based on an output from a neural network, wherein input values of the neural network comprise the first voltage distribution metric and at least one of a deterioration slope associated with a die, or an error rate property associated with a wordline group (WLG).

6. The system of claim 1 , wherein the media management operation comprises writing data stored at the block to a new block.

7. A method, comprising:

determining, by a processing device, a value of a data state metric associated with data stored on a part of a block of a memory device;

responsive to the value of the data state metric satisfying a first threshold criterion, determining a first voltage distribution metric associated with at least the part of the block, wherein the voltage distribution metric reflects one of a voltage distribution margin, a voltage distribution floor, or a voltage distribution center;

responsive to determining that the first voltage distribution metric satisfies a second threshold criterion, determining a second voltage distribution metric associated with the at least part of the block; and

responsive to determining that the second voltage distribution metric satisfies a third threshold criterion, performing a media management operation to relocate the data to a new block of the memory device.

8. The method of claim 7 , wherein a threshold criterion for the voltage distribution metric is based on a deterioration slope associated with a die.

9. The method of claim 7 , wherein a threshold criterion for the voltage distribution metric is based on an error rate property associated with a wordline group (WLG).

10. The method of claim 7 , wherein the voltage distribution metric is determined using a vectorized read level calibration (vRLC) procedure.

11. The method of claim 7 , further comprising:

performing another management operation with respect to the block based on an output from a neural network, wherein input values of the neural network comprise the first voltage distribution metric and at least one of a deterioration slope associated with a die, or an error rate property associated with a wordline group (WLG).

12. The method of claim 7 , wherein the media management operation comprises writing data stored at the block to a new block.

13. A non-transitory computer-readable storage medium comprising instructions that, when executed by a processing device operatively coupled to a memory, performs operations comprising:

determining a value of a data state metric associated with data stored on a part of a block of a memory device;

responsive to the value of the data state metric satisfying a first threshold criterion, determining a first voltage distribution metric associated with at least the part of the block, wherein a voltage distribution metric reflects one of a voltage distribution margin, a voltage distribution floor, or a voltage distribution center;

responsive to determining that the first voltage distribution metric satisfies a second threshold criterion, determining second voltage distribution metric associated with the at least part of the block; and

responsive to determining that the second voltage distribution metric satisfies a third threshold criterion, performing a media management operation to relocate the data to a new block of the memory device.

14. The non-transitory computer-readable storage medium of claim 13 , wherein a threshold criterion for the voltage distribution metric is based on a deterioration slope associated with a die.

15. The non-transitory computer-readable storage medium of claim 13 , wherein a threshold criterion for the voltage distribution metric is based on an error rate property associated with a wordline group (WLG).

16. The non-transitory computer-readable storage medium of claim 13 , wherein the voltage distribution metric is determined using a vectorized read level calibration (vRLC) procedure.

17. The non-transitory computer-readable storage medium of claim 13 , wherein the processing device to perform further operations comprising:

performing another media management operation with respect to the block based on an output from a neural network, wherein input values of the neural network comprise the first voltage distribution metric and at least one of a deterioration slope associated with a die, or an error rate property associated with a wordline group (WLG).

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 9, 2021
From: RAYAPROLU, VAMSI PAVAN; SMITCHGER, CHRIS
To: MICRON TECHNOLOGY, INC.
Reel/Frame 056800/0773 →
Continuity (1)
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