Magnetic recording apparatus having circuits with differing tunnel valve sensors and about the same resistance
AssigneeInternational Business Machines Corporation
InventorsRobert G. Biskeborn, Robert E. Fontana, JR., Calvin S. Lo
Life of this patent
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Abstract
An apparatus, according to one embodiment, includes a first circuit electrically coupled to a first read transducer and a first parallel circuit, the first read transducer having a tunnel valve structure having a resistance. A second circuit is electrically coupled to a second read transducer having a tunnel valve structure. An area of a tunnel barrier portion of the second read transducer along a plane of deposition thereof is larger than an area of a tunnel barrier portion of the first read transducer along a plane of deposition thereof.
Claims20
An apparatus, comprising:
- a first circuit electrically coupled to a first read transducer and a first parallel circuit, the first read transducer having a tunnel valve structure having a resistance;
- and
- a second circuit electrically coupled to a second read transducer having a tunnel valve structure,
- wherein an area of a tunnel barrier portion of the second read transducer along a plane of deposition thereof is larger than an area of a tunnel barrier portion of the first read transducer along a plane of deposition thereof.
An apparatus, comprising:
- a module having a first read transducer and a second read transducer, the first and second read transducers each having a tunnel valve structure,
- wherein an area of a tunnel barrier portion of the second read transducer along a plane of deposition thereof is larger than an area of a tunnel barrier portion of the first read transducer along a plane of deposition thereof,
- a parallel circuit coupled to the first read transducer;
- and
- a second circuit coupled to the second read transducer.
Dependencies are inferred from the claim text.