Invention Grant
- Patent Title: Semiconductor memory device and memory system
- Patent Title (中): 半导体存储器件和存储器系统
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Application No.: US14305503Application Date: 2014-06-16
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Publication No.: US09224469B2Publication Date: 2015-12-29
- Inventor: Yoichi Minemura , Takayuki Tsukamoto , Hiroshi Kanno , Takamasa Okawa , Atsushi Yoshida , Hideyuki Tabata
- Applicant: KABUSHIKI KAISHA TOSHIBA
- Applicant Address: JP Minato-ku
- Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee Address: JP Minato-ku
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Main IPC: G11C11/00
- IPC: G11C11/00 ; G11C13/00

Abstract:
A semiconductor memory device according to an embodiment includes a memory cell array and a control circuit. The memory cell array includes first lines and second lines intersecting each other, a third line commonly connecting to the first lines, memory cells disposed at intersections of the first lines and the second lines, respectively. The control circuit is configured to execute a state determining operation detecting a voltage of the third line, and adjust a voltage applied to the first lines and the second lines during a resetting operation or a setting operation based on a result of the state determining operation. The resetting operation raises a resistance value of the variable resistance element. The setting operation lowers the resistance value of the variable resistance element.
Public/Granted literature
- US20150117089A1 SEMICONDUCTOR MEMORY DEVICE AND MEMORY SYSTEM Public/Granted day:2015-04-30
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