Invention Grant
- Patent Title: Nonvolatile memory device and method of controlling the same
- Patent Title (中): 非易失性存储器件及其控制方法
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Application No.: US14635448Application Date: 2015-03-02
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Publication No.: US09336880B2Publication Date: 2016-05-10
- Inventor: Takeshi Takagi , Masaki Yamato , Hiroyuki Ode , Takeshi Yamaguchi , Toshiharu Tanaka
- 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: G11C13/00
- IPC: G11C13/00 ; G06F11/07

Abstract:
A nonvolatile memory device comprises a memory cell comprising a variable resistance element connected between a couple of wirings and a control circuit applying a voltage between the couple of wirings connected to the memory cell. In data rewriting, the control circuit repeats a first voltage application step of applying a first write voltage between the couple of wirings and a first verify step of applying a first voltage lower than the first write voltage between the couple of wirings and comparing a cell current through the cell with a first threshold current, the steps repeated until a magnitude relation of the cell current and the first threshold current satisfies a first condition. If the first condition is satisfied, the circuit performs a second voltage application step of applying a second write voltage between the couple of wirings.
Public/Granted literature
- US20160019959A1 NONVOLATILE MEMORY DEVICE AND METHOD OF CONTROLLING THE SAME Public/Granted day:2016-01-21
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