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:
Oct. 27, 2020
Filed:
Aug. 02, 2017
Zentel Japan Corporation, Tokyo, JP;
Bunsho Kuramori, Tokyo, JP;
Mineo Noguchi, Kanagawa, JP;
Akihiro Hirota, Tokyo, JP;
Masahiro Ishihara, Saitama, JP;
Mitsuru Yoneyama, Tokyo, JP;
Takashi Kubo, Osaka, JP;
Masaru Haraguchi, Osaka, JP;
Jun Setogawa, Hyogo, JP;
Hironori Iga, Hyogo, JP;
ZENTEL JAPAN CORPORATION, Tokyo, JP;
Abstract
A semiconductor memory device is provided with a row control circuit, in order to dissolve a Row Hammer issue. The row control circuit is configured to: (A) latches one of (a) a target address upon issuing of an ACTIVE command to the semiconductor memory device, and (b) a row address of a victim cell in which data of a memory cell is affected by the target address, as a victim address by using a predetermined row address latch method; and then, (B) refreshes the victim cell having the victim address by a predetermined refresh method upon issuing of a REFRESH command.