Read-write magnetoresistive transducer having a plurality of MR elements
AssigneeCompagnie Internationale pour l'Informatique
InventorJean-Pierre Lazzari
Life of this patent
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Abstract
A read-write transducer for magnetic recording is made of two plural magnetoresistive layer flat structures contacting each other at first ends thereof and spaced apart at the opposite ends thereof and of a flat conductor coil winding having a front branch inserted between the said spaced apart ends of the structures. The magnetoresistive layers of the stacks are electrically interconnected in a read-out circuit and the winding may receive writing electrical currents. Each magnetoresistive layer in a stack is inserted between two thicker high permeability magnetic layers and all layers in a stack are relatively insulated.
Claims3
A read-write transducer comprising, on a substrate, the combination of:
- a first stack of magnetic layers including at least two magnetoresistive layers and at least three thicker high permeability layers, each magnetoresistive layer being disposed between two of said thicker layers;
- a second stack having the same number. and relative arrangement of magnetic layers as said first stack;
- both stacks having rear parts contacting one another and having front parts spaced apart, forming a magnetic airgap therebetween;
- a flat conductor coil having a front branch within said magnetic airgap and other branches extending from opposite ends of said front branch along the sides of said stacks and joined by a rear branch on said rear part of said stacks;
- said magnetoresistive layers in said stacks being electrically interconnected, each of said magnetoresistive layers being of anisotropic material having an easy axis of magnetization at substantially 45.degree. to the direction of electrical current flow therethrough.
Dependencies are inferred from the claim text.