Title:
NONVOLATILE MEMORY CELL, RESISTANCE VARIABLE NONVOLATILE MEMORY DEVICE AND METHOD FOR DESIGNING NONVOLATILE MEMORY CELL
Document Type and Number:
WIPO Patent Application WO/2010/084774
Kind Code:
A1
Abstract:
A nonvolatile memory cell (1) is provided with an electrode (10), an electrode (20), and an oxide layer (30) arranged between the electrode (10) and the electrode (20), and in the nonvolatile memory cell, resistance varies when a voltage or a current is applied between the electrodes. When a voltage or a current is applied between the electrodes with the electrode (10) as the anode, on the interface between the electrode (10) and the oxide layer (30), the electrode (10) transfers in the direction to be away from the oxide layer (30) with the oxygen atoms adjacent to the electrode (10) in the oxide layer (30), and due to the transfer of the electrode (10) and the oxygen atoms, the magnitude of the energy gap in the oxide layer (30) varies or the state density in the vicinity of Fermi energy varies. Thus, the nonvolatile memory cell is provided with an oxide layer having a large resistance ratio between the resistance prior to applying the voltage and that after applying the voltage.
More Like This:
Inventors:
KASAI HIDEAKI
NAKANISHI HIROSHI
KISHI HIROFUMI
NAKANISHI HIROSHI
KISHI HIROFUMI
Application Number:
PCT/JP2010/000396
Publication Date:
July 29, 2010
Filing Date:
January 25, 2010
Export Citation:
Assignee:
UNIV OSAKA (JP)
KASAI HIDEAKI
NAKANISHI HIROSHI
KISHI HIROFUMI
KASAI HIDEAKI
NAKANISHI HIROSHI
KISHI HIROFUMI
International Classes:
H01L27/10; G11C13/00; H01L45/00; H01L49/00
Foreign References:
| JP2006279042A | 2006-10-12 | |||
| JP2008078509A | 2008-04-03 | |||
| JP2008306157A | 2008-12-18 | |||
| JP2007288008A | 2007-11-01 |
Other References:
SEONG-GEON PARK ET AL.: "First-principles study of resistance switching in rutile Ti02 with oxygen vacancy", 9TH ANNUAL NON-VOLATILE MEMORY TECHNOLOGY SYMPOSIUM, 11 November 2008 (2008-11-11), pages 1 - 5, XP031382178
KOJI KISHI ET AL.: "Mitsudohankansu Riron ni Motozuku ReRAM Zairyo no Hyoka", DAI 69 KAI EXTENDED ABSTRACTS; THE JAPAN SOCIETY OF APPLIED PHYSICS, vol. 2, 2 September 2008 (2008-09-02), pages 532
KOJI KISHI ET AL.: "Mitsudohankansu Riron ni Motozuku ReRAM Zairyo no Hyoka", DAI 69 KAI EXTENDED ABSTRACTS; THE JAPAN SOCIETY OF APPLIED PHYSICS, vol. 2, 2 September 2008 (2008-09-02), pages 532
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)
Download PDF:
Previous Patent: CATALYST LAYER FOR FUEL CELL AND CATALYST FOR USE THEREIN
Next Patent: RELAY APPARATUS, CONTROL METHOD, AND PROGRAM
Next Patent: RELAY APPARATUS, CONTROL METHOD, AND PROGRAM