Title:
REDUNDANT DATA PROTECTION FOR NAND MEMORY USING SELF-VERIFICATION BY INTERNAL FIRMWARE
Document Type and Number:
WIPO Patent Application WO/2023/133877
Kind Code:
A1
Abstract:
A method of data protection for a NAND memory includes programming first and second pages of a NAND flash memory device according to programming data such that data stored in the first and second pages are redundant. The programming of the first and second pages includes a plurality of programming operations using a plurality of programming voltages and a plurality of verifying operations to determine whether programmed memory cells of the first page have threshold voltage levels according to the programming data. The method also includes determining a completion of the programming of the first and second pages based on each of the plurality of verification operations returning a pass result. The method also includes performing, after the determining, a read operation on the second page by the NAND flash memory device to self-verify the data stored at the second page.
Inventors:
HE YOUXIN (CN)
Application Number:
PCT/CN2022/072284
Publication Date:
July 20, 2023
Filing Date:
January 17, 2022
Export Citation:
Assignee:
YANGTZE MEMORY TECH CO LTD (CN)
International Classes:
G11C16/10; G11C16/34
Foreign References:
| US20210225450A1 | 2021-07-22 | |||
| US20160231953A1 | 2016-08-11 | |||
| US20080117688A1 | 2008-05-22 | |||
| US20170162273A1 | 2017-06-08 | |||
| US20190189215A1 | 2019-06-20 |
Attorney, Agent or Firm:
NTD UNIVATION INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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