Invention Grant
- Patent Title: Cross point variable resistance nonvolatile memory device
- Patent Title (中): 交叉点可变电阻非易失性存储器件
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Application No.: US13380624Application Date: 2011-06-02
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Publication No.: US08441839B2Publication Date: 2013-05-14
- Inventor: Ryotaro Azuma , Kazuhiko Shimakawa
- Applicant: Ryotaro Azuma , Kazuhiko Shimakawa
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2010-128354 20100603
- International Application: PCT/JP2011/003125 WO 20110602
- International Announcement: WO2011/152061 WO 20111208
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
A cross point variable resistance nonvolatile memory device includes memory cells having the same orientation for stable characteristics of all layers. Each memory cell (51) is placed at a different one of cross points of bit lines (53) in an X direction and word lines (52) in a Y direction formed in layers. In a multilayer cross point structure where vertical array planes sharing the word lines are aligned in the Y direction each for a group of bit lines aligned in a Z direction, even and odd layer bit line selection switch elements (57, 58) switch electrical connection and disconnection between a global bit line (56) and commonly-connected even layer bit lines and commonly-connected odd layer bit lines, respectively. A bidirectional current limiting circuit (92) having parallel-connected P-type current limiting element (91) and N-type current limiting element (90) is provided between the global bit line and the switch elements.
Public/Granted literature
- US20120099367A1 CROSS POINT VARIABLE RESISTANCE NONVOLATILE MEMORY DEVICE Public/Granted day:2012-04-26
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