Invention Grant
- Patent Title: Efficient sensing of soft bit data for non-volatile memory
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Application No.: US17557236Application Date: 2021-12-21
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Publication No.: US11894068B2Publication Date: 2024-02-06
- Inventor: Hua-Ling Cynthia Hsu
- Applicant: SanDisk Technologies LLC
- Applicant Address: US TX Addison
- Assignee: SanDisk Technologies LLC
- Current Assignee: SanDisk Technologies LLC
- Current Assignee Address: US TX Addison
- Agency: Vierra Magen Marcus LLP
- Main IPC: G11C16/26
- IPC: G11C16/26 ; G11C16/04 ; G11C16/24 ; G06F11/10 ; G11C11/56 ; H01L25/065

Abstract:
A non-volatile memory combines a hard bit and a soft bit read into a single, efficient soft sense sequence by using two sense per state level to improve read time efficiency. Rather than a standard hard bit read, where two soft bit reads are performed, offset above and below the hard bit read value, the hard bit read is shifted so that it reliable senses one state but less reliably senses the other state and soft bit data is only determined for the less reliably sensed state. This reduces the amount of soft bit data. The efficient soft sense sequence can be used as a default read mode, providing soft bit information for ECC correction without triggering a read error handling flow. Merging the soft bit and hard bit sense into one sequence can avoid extra overhead for read sequence operations.
Public/Granted literature
- US20230077517A1 EFFICIENT SENSING OF SOFT BIT DATA FOR NON-VOLATILE MEMORY Public/Granted day:2023-03-16
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