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:
May. 19, 2020
Filed:
Aug. 25, 2018
Renesas Electronics Corporation, Koutou-ku, Tokyo, JP;
Hirokazu Nagase, Tokyo, JP;
Renesas Electronics Corporation, Tokyo, JP;
Abstract
To provide a semiconductor memory device capable of storing multi-value data while suppressing an increase in the threshold voltage set for a memory cell. A semiconductor memory device according to an embodiment includes a plurality of memory cell pairs, each having a first memory cell and a second memory cell. The first memory cell is configured so as to set at least one threshold voltage, whereas the second memory cell is configured so as to set a plurality of threshold voltages. Data stored in the memory cell pairs is defined using differences between the threshold voltages of the second memory cell and the threshold voltage of the first memory cell.