Magentic junction memory array

A memory writing apparatus comprising:

• a probe comprising a magnetic field data writing head;
• a stage disposed adjacent to the probe;
• an x-y plane actuator coupled to the probe or the platform, the x-y plane actuator providing relative x-y plane movement between the probe and the stage;
• and
• a magnetic junction memory array interchangeably disposed on the stage, the magnetic junction memory array comprising:
• a plurality of electrically conductive word lines extending in a first direction;
• a plurality of electrically conductive bit lines extending in a second direction and forming a cross-point array with the plurality of electrically conductive word lines;
• a memory cell proximate to, at least selected, cross-points forming a magnetic junction memory array, each memory cell comprising a magnetic bit and an isolation transistor, the isolation transistor comprising a current source and a gate, the current source is electrically coupled to the bit line and the gate is electrically coupled to the word line;
• and
• an electrically conductive cover layer disposed on and in electrical communication with the magnetic bits;
• wherein the electrically conductive cover layer is between the magnetic field data writing head and the magnetic bit.

A method comprising;

• providing a magnetic junction memory array comprising:
• a plurality of electrically conductive word lines extending in a first direction;
• a plurality of electrically conductive bit lines extending in a second direction and forming a cross-point array with the plurality of electrically conductive word lines;
• a memory cell proximate to, at least selected, cross-points forming a magnetic junction memory array, each memory cell comprising a magnetic pinned layer between a magnetic bit and an isolation transistor, the isolation transistor comprising a current source and a gate, the current source is electrically coupled to the bit line and the gate is electrically coupled to the word line;
• and
• an electrically conductive cover layer disposed on and in electrical communication with the magnetic bits;
• and
• writing data to the magnetic bits with a magnetic field data writing head, the magnetic field data writing head being movable relative to the magnetic junction memory array.