Invention Grant
- Patent Title: Semiconductor memory device for preventing occurrence of row hammer issue
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Application No.: US16088211Application Date: 2017-08-02
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Publication No.: US10818337B2Publication Date: 2020-10-27
- Inventor: Bunsho Kuramori , Mineo Noguchi , Akihiro Hirota , Masahiro Ishihara , Mitsuru Yoneyama , Takashi Kubo , Masaru Haraguchi , Jun Setogawa , Hironori Iga
- Applicant: ZENTEL JAPAN CORPORATION
- Applicant Address: JP Tokyo
- Assignee: ZENTEL JAPAN CORPORATION
- Current Assignee: ZENTEL JAPAN CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- International Application: PCT/JP2017/027992 WO 20170802
- International Announcement: WO2019/026197 WO 20190207
- Main IPC: G11C11/406
- IPC: G11C11/406 ; G11C11/408

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.
Public/Granted literature
- US20190362774A1 SEMICONDUCTOR MEMORY DEVICE FOR PREVENTING OCCURANCE OF ROW HAMMER ISSUE Public/Granted day:2019-11-28
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