The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2026
Filed:
Aug. 29, 2024
Kioxia Corporation, Tokyo, JP;
Yuki Kawaguchi, Fujisawa Kanagawa, JP;
Takehiko Amaki, Yokohama Kanagawa, JP;
Suguru Nishikawa, Kita Tokyo, JP;
Yoshihisa Kojima, Kawasaki Kanagawa, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
A memory system includes a non-volatile memory and a memory controller. The non-volatile memory includes a memory cell and a control circuit that writes first data of n bits to the memory cell by a first write operation and writes second data of m bits, which includes the n bits of the first data, to the memory cell by a second write operation. The memory controller issues a first command sequence to the non-volatile memory to execute the first write operation, selects one of first and second methods for preparing the second data for the second write operation based on an index related to reliability of the first data stored in the memory cell, and issues a second command sequence to the non-volatile memory to execute the second write operation, the second command sequence indicating the selected method for preparing the second data.