Invention Grant
- Patent Title: Non-volatile memory with intentional overprogramming to improve short term data retention issue
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Application No.: US17688999Application Date: 2022-03-08
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Publication No.: US11978507B2Publication Date: 2024-05-07
- Inventor: Ming Wang , Liang Li , Ke Zhang
- 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: Vierra Magen Marcus LLP
- Main IPC: G11C11/56
- IPC: G11C11/56 ; G11C16/04 ; G11C16/10 ; G11C16/34

Abstract:
To remedy short term data retention issues, a non-volatile memory performs a multi-pass programming process to program data into a set of non-volatile memory cells and identifies non-volatile memory cells that experienced downward threshold voltage drift after a first pass of the multi-pass programming process and prior to a final pass of the multi-pass programming process. The final pass of the multi-pass programming process comprises programming non-volatile memory cells not identified to have experienced the downward threshold voltage drift to a set of final target threshold voltages and purposefully overprogramming non-volatile memory cells identified to have experienced the downward threshold voltage drift to threshold voltages greater than respective final target threshold voltages by one or more offsets.
Public/Granted literature
- US20230290405A1 NON-VOLATILE MEMORY WITH INTENTIONAL OVERPROGRAMMING TO IMPROVE SHORT TERM DATA RETENTION ISSUE Public/Granted day:2023-09-14
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