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US 2022/0068970 A1Published application
Interlayer Exchange Coupling Logic Cells
AssigneeRedpine Signals, Inc.
InventorsVenkat MATTELA, Sanghamitra DEBROY, Santhosh SIVASUBRAMANI, Amit ACHARYYA
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Abstract
An AND or OR logic device has multiple layers of ferromagnetic material separated from each other by non-magnetic layers of electrically conductive material of atomic thickness, sufficient to generate anti-magnetic response in a magnetized layer. The anti-magnetic response in a layer below a layer magnetized with a polarity is summed in a region which is coupled to an output, the output generating at least one of a AND or OR logic function on applied input magnetization.
Claims18
1) A logic device comprising:
- a lower continuous layer of ferromagnetic material;
- a thin spacer layer sufficient to invoke a Giant MagnetoResistive (GMR) effect with anti-ferromagnetic response to an adjacent magnetic field;
- an upper layer comprising a plurality of ferromagnetic regions, the plurality of ferromagnetic regions further comprising:
- an output ferromagnetic region;
- at least two logic inputs comprising ferromagnetic regions adjacent to each other and also adjacent to the output ferromagnetic region;
- a mode input comprising a ferromagnetic region adjacent to one of the logic inputs and also adjacent to the output ferromagnetic region;
- the at least two logic inputs and mode input provided as a planar magnetic field and generating an anti-ferromagnetic field in the lower continuous layer of ferromagnetic material and generating a superposition magnetic field in a region of the lower continuous layer of ferromagnetic material which is below the output ferromagnetic region.
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10) A logic device comprising:
- a lower layer of ferromagnetic material, the lower layer of ferromagnetic material coupling an applied magnetic field from one region of the lower layer to another region of the lower layer;
- a thin spacer layer sufficient to invoke a Giant MagnetoResistive (GMR) effect with anti-ferromagnetic response to an adjacent magnetic field;
- an upper layer comprising a plurality of ferromagnetic regions, the plurality of ferromagnetic regions further comprising:
- an output ferromagnetic region;
- at least two logic inputs comprising ferromagnetic regions adjacent to each other and also adjacent to the output ferromagnetic region;
- a mode input comprising a ferromagnetic region adjacent to one of the logic inputs and also adjacent to the output ferromagnetic region;
- the at least two logic inputs and mode input provided as a planar magnetic field and generating an anti-ferromagnetic field in the lower layer of ferromagnetic material and generating a superposition magnetic field in a region of the lower layer of ferromagnetic material which is below the output ferromagnetic region.
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Dependencies are inferred from the claim text.