Invention Application
- Patent Title: NONVOLATILE MEMORY ELEMENT AND NONVOLATILE MEMORY DEVICE
- Patent Title (中): 非易失性存储元件和非易失性存储器件
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Application No.: US13599286Application Date: 2012-08-30
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Publication No.: US20120327702A1Publication Date: 2012-12-27
- Inventor: Takeshi Takagi , Zhiqiang Wei , Takeki Ninomiya , Shunsaku Muraoka , Yoshihiko Kanzawa
- Applicant: Takeshi Takagi , Zhiqiang Wei , Takeki Ninomiya , Shunsaku Muraoka , Yoshihiko Kanzawa
- Priority: JP2008-309383 20081204
- Main IPC: H01L45/00
- IPC: H01L45/00 ; G11C11/21

Abstract:
A nonvolatile memory element includes: a first electrode layer; a second electrode layer; and a variable resistance layer which is placed between the electrode layers, and whose resistance state reversibly changes between a high resistance state and a low resistance state based on a polarity of a voltage applied between the electrode layers. The variable resistance layer is formed by stacking a first oxide layer including an oxide of a first transition metal and a second oxide layer including an oxide of a second transition metal which is different from the first transition metal. At least one of the following conditions is satisfied: (1) a dielectric constant of the second oxide layer is larger than a dielectric constant of the first oxide layer; and (2) a band gap of the second oxide layer is smaller than a band gap of the first oxide layer.
Public/Granted literature
- US08565005B2 Nonvolatile memory element and nonvolatile memory device Public/Granted day:2013-10-22
Information query
IPC分类: