Title:
NONVOLATILE SEMICONDUCTOR STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/068992
Kind Code:
A1
Abstract:
Provided is a nonvolatile semiconductor storage device, which is enabled to perform
a stable, high-speed switching operation on variable resistance elements by
applying a voltage of a positive or negative polarity with no difference in the
period of an application time. The nonvolatile semiconductor storage device comprises
variable resistance elements of a two-terminal structure, in which the resistance
characteristics defined by current-voltage characteristics at two ends are
enabled to transit between two resistance characteristics capable of taking
a low resistance state and a high resistance state stably by applying a voltage
satisfying a predetermined condition to the two ends, and which are characterized
to transit from a low resistance state to a high resistance state, when a voltage
of a first polarity having an absolute value at or higher than a first threshold
voltage is applied, and from a high resistance state to a low resistance state,
when a voltage of a second polarity having an absolute value at or higher than a
second threshold voltage is applied. Further comprised are a load circuit connected
in series with the variable resistance elements and having an adjustable load
resistance, and a voltage generating circuit capable of applying a voltage to
the two ends of a series circuit. The nonvolatile semiconductor storage device is
so constituted as is enabled to transit between the states of the variable resistance elements
by adjusting the resistance of the load circuit.
Inventors:
YAMAZAKI SHINOBU
HOSOI YASUNARI
AWAYA NOBUYOSHI
SATO SHINICHI
TANAKA KENICHI
HOSOI YASUNARI
AWAYA NOBUYOSHI
SATO SHINICHI
TANAKA KENICHI
Application Number:
PCT/JP2007/071502
Publication Date:
June 12, 2008
Filing Date:
November 05, 2007
Export Citation:
Assignee:
SHARP KK (JP)
YAMAZAKI SHINOBU
HOSOI YASUNARI
AWAYA NOBUYOSHI
SATO SHINICHI
TANAKA KENICHI
YAMAZAKI SHINOBU
HOSOI YASUNARI
AWAYA NOBUYOSHI
SATO SHINICHI
TANAKA KENICHI
International Classes:
H01L27/10; G11C13/00; H01L45/00; H01L49/00
Foreign References:
| JP2006203098A | 2006-08-03 | |||
| JP2006099882A | 2006-04-13 |
Attorney, Agent or Firm:
MASAKI, Yoshifumi (3-6 Imabashi 4-chome,Chuo-ku, Osaka-sh, Osaka 42, JP)
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