Back to results
US 5,475,550 AGranted
Enhanced cross-talk suppression in magnetoresistive sensors
AssigneeSeagate Technology LLC
InventorPeter K. George
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSeagate Technology LLC
InventorPeter K. George
Estimating the term…
A magnetoresistive transducer design for cross-talk supression and increased Neel temperature is disclosed. The transducer is formed by fabricating on a suitable substrate an antiferromagnetic material layer above and below the permalloy layer. The additional antiferromagnetic layer between the substrate and the permalloy increases the exchange coupling biasing of the magnetoresistive transducer thereby providing increased cross-talk supression and greater longitudinal bias. The location of the additional antiferromagnetic layer beneath the permalloy also increases the Neel temperature of the transducer. A permanent magnetic material can also be substituted for the antiferromagnetic material with the result that the longitudinal bias is increased by coupling to the upper and lower surfaces of the permalloy layer thereby doubling the effect.
A magnetoresistive read transducer assembly comprising a magnetoresistive conductive thin film layer and a first pair of opposing thin film permanent magnetic layers exchange coupled to a first portion of the magnetoresistive conductive thin film layer, the first portion of the magnetoresistive conductive thin film layer being sandwiched directly between the thin film layers of the first pair so that there is surface contact between each thin film layer of the first pair and the magnetoresistive conductive thin film layer, and a second pair of opposing thin film permanent magnetic layers exchange coupled to a second portion of the magnetoresistive conductive thin film layer, the second portion of the magnetoresistive conductive thin film layer being sandwiched directly between the thin film layers of the second pair so that there is surface contact between each thin film layer of the second pair and the magnetoresistive conductive thin film layer, the first and second pairs being spaced apart along the magnetoresistive conductive thin film layer to form an active region of the magnetoresistive layer between the first and second pairs and characterized by the absence of exchange coupled material in direct contact with the magnetoresistive conductive thin film layer in the active region.
A magnetoresistive read transducer assembly comprising:
Dependencies are inferred from the claim text.