发明授权
US09378817B2 Variable resistance nonvolatile memory element writing method and variable resistance nonvolatile memory device 有权
可变电阻非易失性存储元件写入方法和可变电阻非易失性存储器件

Variable resistance nonvolatile memory element writing method and variable resistance nonvolatile memory device
摘要:
A variable resistance nonvolatile memory element writing method of, by applying a voltage pulse to a memory cell including a variable resistance element, reversibly changing the variable resistance element between a first resistance state and a second resistance state according to a polarity of the applied voltage pulse is provided. The variable resistance nonvolatile memory element writing method includes applying a first preliminary voltage pulse and subsequently applying the first voltage pulse to the variable resistance element to change the variable resistance element from the second resistance state to the first resistance state, the first preliminary voltage pulse being smaller in voltage absolute value than the second threshold voltage and different in polarity from the first voltage pulse.
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