Invention Grant
- Patent Title: Back pattern counter measure for solid state drives
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Application No.: US17752112Application Date: 2022-05-24
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Publication No.: US11978490B2Publication Date: 2024-05-07
- Inventor: Ming Jin , Yongke Sun , Lanlan Gu
- Applicant: Western Digital Technologies, Inc.
- Applicant Address: US CA San Jose
- Assignee: Western Digital Technologies, Inc.
- Current Assignee: Western Digital Technologies, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Michael Best & Friedrich LLP
- Main IPC: G11C11/16
- IPC: G11C11/16 ; G11C11/408

Abstract:
This disclosure includes back pattern counter measures for solid state drives. Embodiments described herein include setting and applying read threshold offsets according to flags set based on an amount of data stored within a memory block (e.g., an “openness” of the block). The flag is implemented during read commands to account for shifts in voltage distribution of open blocks. A value of the flag may be chosen based on a number of word lines included in the block that store data. The read threshold offsets may further be based on at least one of the set flag or an age of a respective NAND cell.
Public/Granted literature
- US20230410866A1 Back Pattern Counter Measure for Solid State Drives Public/Granted day:2023-12-21
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