Invention Grant
US08902635B2 Variable resistance nonvolatile memory device and method of writing thereby
有权
可变电阻非易失性存储器件及其写入方法
- Patent Title: Variable resistance nonvolatile memory device and method of writing thereby
- Patent Title (中): 可变电阻非易失性存储器件及其写入方法
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Application No.: US13990280Application Date: 2012-11-26
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Publication No.: US08902635B2Publication Date: 2014-12-02
- Inventor: Akifumi Kawahara , Ryotaro Azuma , Kazuhiko Shimakawa , Kouhei Tanabe
- Applicant: Panasonic Corporation
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, LLP
- Priority: JP2011-261019 20111129
- International Application: PCT/JP2012/007569 WO 20121126
- International Announcement: WO2013/080511 WO 20130606
- Main IPC: G11C13/00
- IPC: G11C13/00

Abstract:
Provided is a variable resistance nonvolatile memory device that achieves, in multi-bit simultaneous writing for increasing a writing speed, writing with little variation caused by positions of memory cells in multi-bit simultaneous writing. The variable resistance nonvolatile memory device includes bit lines, word lines, memory cells, a first write circuit (e.g., a write circuit (60-0)), a second write circuit (e.g., a write circuit (60-k−1)), a first selection circuit (e.g., a selection circuit (S0—0)), a second selection circuit (e.g., a selection circuit (S0_k−1)), and a first word line drive circuit (a word line drive circuit (40-1)), wherein the first selection circuit (e.g., an NMOS transistor (TS0—0—0 to TS0—0_m−1) included in the selection circuit) has a greater ON resistance than the second selection circuit (e.g., an NMOS transistor (TS0_k−1—0 to TS0_k−1_m−1) included in the selection circuit) does.
Public/Granted literature
- US20140112055A1 VARIABLE RESISTANCE NONVOLATILE MEMORY DEVICE AND METHOD OF WRITING THEREBY Public/Granted day:2014-04-24
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