Claims
- 1. 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.
- 2. The transducer assembly of claim 1 wherein at least one layer of said pair of thin film layers is fabricated of one of the group comprising cobalt platinum, cobalt chromum, cobalt samarium and cobalt platinum chromum.
- 3. A magnetoresistive read transducer assembly comprising:
- first, second,third and fourth thin film layers fabricated of permanent magnetic material; and
- a magnetoresistive conductive thin film layer sandwiched directly between the first and second thin film layers and directly between the third and fourth thin film layers and having a first longitudinal boundary defined by the first and second thin film layers and a second longitudinal boundary defined by the third and fourth thin film layers, the thin film layers being exchange coupled to the magnetoresistive conductive thin film layer and the first and second layers being spaced apart from the third and fourth layers to define an active region of the magnetoresistive conductive thin film layer between the first and second longitudinal boundaries characterized by the absence of exchange coupled material in direct contact with the magnetoresistive conductive thin film layer in the active region.
- 4. The transducer assembly of claim 3 wherein at least one layer of said pair of thin film layers is fabricated of one of the group comprising cobalt platinum, cobalt chromum, cobalt samarium and cobalt platinum chromum.
- 5. The transducer assembly of claim 3 wherein the combined coercivity of said magnetoresistive conductive thin film layer is between approximately 100 to 1000 Oersted for permanent magnet coupling.
- 6. The magnetoresistive read transducer assembly of claim 3 wherein each one of said pair of thin film layers and said magnetoresistive layer are approximately 250 Angstroms thick.
Parent Case Info
This is a continuation of application Ser. No. 07/936, 177, filed Aug. 25, 1992, now abandoned.
US Referenced Citations (19)
Continuations (1)
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Number |
Date |
Country |
Parent |
936177 |
Aug 1992 |
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