发明授权
US08179713B2 Nonvolatile memory element, nonvolatile memory device, and nonvolatile semiconductor device
有权
非易失性存储元件,非易失性存储器件和非易失性半导体器件
- 专利标题: Nonvolatile memory element, nonvolatile memory device, and nonvolatile semiconductor device
- 专利标题(中): 非易失性存储元件,非易失性存储器件和非易失性半导体器件
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申请号: US12671162申请日: 2009-05-18
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公开(公告)号: US08179713B2公开(公告)日: 2012-05-15
- 发明人: Yoshihiko Kanzawa , Satoru Mitani , Zhiqiang Wei , Takeshi Takagi
- 申请人: Yoshihiko Kanzawa , Satoru Mitani , Zhiqiang Wei , Takeshi Takagi
- 申请人地址: JP Osaka
- 专利权人: Panasonic Corporation
- 当前专利权人: Panasonic Corporation
- 当前专利权人地址: JP Osaka
- 代理机构: McDermott Will & Emery LLP
- 优先权: JP2008-145415 20080603
- 国际申请: PCT/JP2009/002186 WO 20090518
- 国际公布: WO2009/147790 WO 20091210
- 主分类号: G11C11/00
- IPC分类号: G11C11/00
摘要:
A nonvolatile memory element comprises a first electrode (103), a second electrode (105), and a resistance variable layer (104) which is provided between the first electrode and the second electrode, and is configured to reversibly switch an interelectrode resistance value which is a resistance value between the first electrode and the second electrode, in response to an interelectrode voltage which is an electric potential of the second electrode on the basis of the first electrode, the resistance variable layer includes an oxygen-deficient transition metal oxide, the first electrode side and the second electrode side have an asymmetric structure, a portion of the resistance variable layer which is located at the first electrode side and a portion of the resistance variable layer which is located at the second electrode side are each configured to be selectively placed into one of a low-resistance state and a high-resistance state, so as to attain a stable state in three or more different interelectrode resistance values, the stable state being a state in which the interelectrode resistance value is invariable regardless of a change in the interelectrode voltage within a specified range.
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