Patent ID: 7196957

Claim:
A computing system comprising: a central processing unit; a memory array electronically connected to the central processing unit; the memory array comprising a magnetic memory structure; the magnetic memory structure comprising: a first group of magnetic tunnel junctions, the first group comprising: a first layer formed adjacent to a substrate, the first layer comprising a first plurality of magnetic tunnel junctions; a second layer formed adjacent to the first layer, the second layer comprising a second plurality of magnetic tunnel junctions; a first heater formed adjacent to at least one of the first plurality of magnetic tunnel junctions and the second plurality of magnetic tunnel junctions, the first heater providing thermal heat to the at least one of the first plurality of magnetic tunnel junctions and the second plurality of magnetic tunnel junctions, the first heater being formed by a common first group conductor comprising first heat regions proximate to at least one of the first plurality of magnetic tunnel junctions and the second plurality of magnetic tunnel junctions; wherein current conducted through the common first group conductor can be used to aid both writing and heating of more than one of the first magnetic tunnel junctions; a second group of magnetic tunnel junctions, the second group comprising: a second group first layer formed adjacent to the substrate, the second group first comprising a third plurality of magnetic tunnel junctions; a second group second layer formed adjacent to the second group first layer, the second group second layer comprising a fourth plurality of magnetic tunnel junctions; a third heater formed adjacent to at least one of the third plurality of magnetic tunnel junctions and the fourth plurality of magnetic tunnel junctions, the third heater providing thermal heat to the at least one of the third plurality of magnetic tunnel functions and the fourth plurality of magnetic tunnel junctions, wherein the first heater is turned on if the first and second pluralities of magnetic tunnel junctions are selected, and the third heater is turned on if the third and fourth magnetic tunnel junctions are selected.