发明授权
US09142289B2 Method for driving variable resistance element, and nonvolatile memory device 有权
用于驱动可变电阻元件的方法和非易失性存储器件

Method for driving variable resistance element, and nonvolatile memory device
摘要:
A driving method for driving a variable resistance element and a nonvolatile memory device, which achieves stable storage operation. In a low resistance write process, a low resistance writing voltage pulse having the negative polarity is applied once to a variable resistance layer included in a variable resistance element while in a high resistance write process, a high resistance writing voltage pulse having the positive polarity is applied more than twice to the same variable resistance layer. Here, when a voltage value of one of the high resistance writing voltage pulses is VH1 and a voltage value of the other high resistance writing voltage pulse applied subsequently is VH2, VH1>VH2 is satisfied.
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