Magnetic bubble-domain device
AssigneeU.S. Philips Corporation
InventorDirk J. Breed
Life of this patent
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Abstract
A magnetic domain device comprising a layer of a magnetic material for the formation of magnetic domains, for example bubbles, under the influence of a bias magnetic field and a propagation structure with magnetically operating elements for driving the magnetic domains by the sequential formation thereon of preferred positions for the domains. The current conductors used to propagate the domains, either meander conductors or rotary field "coils", are arranged on a layer of silicon, so that the heat developed in the current conductors can readily be carried off by the silicon which exhibits a good thermal conductivity.
Claims20
A magnetic domain device comprising:
- a plate of magnetic material;
- means for generating a magnetic field extending transversely in said plate of magnetic material for sustaining magnetic domains therein;
- at least one current conductor under the control of a current therein for simultaneously producing a plurality of preferred positions for said magnetic domain in said plate of magnetic material and, under control of a sequence of currents in said current conductor, producing a continual sequence of preferred positions for domains thereby determining a domain path;
- a silicon plate positioned at least substantially parallel to said plate of magnetic material;
- an insulating layer at least partly covering the silicon plate;
- wherein at least a part of said current conductor is structurally joined to said insulating layer so as to carry off heat which is developed by said current in said conductor through heat transfer to and heat conduction in said silicon plate.
Dependencies are inferred from the claim text.