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SPIN-TRANSFER TORQUE MEMORY NON-DESTRUCTIVE SELF-REFERENCE READ METHOD

  • US 20090323403A1
  • Filed: 06/27/2008
  • Published: 12/31/2009
  • Est. Priority Date: 06/27/2008
  • Status: Active Grant
First Claim
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1. A method of non-destructive self-reference reading a spin-transfer torque memory unit, comprising:

  • applying a first read current through a magnetic tunnel junction data cell and forming a first bit line read voltage, the magnetic tunnel junction data cell having a first resistance state;

    storing the first bit line read voltage in a first voltage storage device;

    applying a second read current thorough the magnetic tunnel junction data cell having the first resistance state and forming a second bit line read voltage, the first read current being less than the second read current;

    storing the second bit line read voltage in a second voltage storage device; and

    comparing the stored first bit line read voltage with the stored second bit line read voltage to determine whether the first resistance state of the magnetic tunnel junction data cell was a high resistance state or low resistance state.

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