Magnetic recording module having differing tunnel valve sensors
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 module having an array of first read transducers each having a tunnel valve structure and a second read transducer coupled to the array of first read transducers, the second read transducer having a tunnel valve structure. The apparatus also includes a controller, and a cable coupling the read transducers to the controller, thereby forming a plurality of circuits extending from the controller, each circuit corresponding to one of the transducers. Resistances of the circuits are about the same.
Claims16
An apparatus, comprising:
- a module having an array of first read transducers each having a tunnel valve structure and a second read transducer coupled to the array of first read transducers, the second read transducer having a tunnel valve structure;
- and
- a controller and a cable coupling the read transducers to the controller, thereby forming a plurality of circuits extending between the controller and the read transducers,
- wherein resistances of the circuits are substantially the same,
- wherein a resistivity of the tunnel valve structure of each of the first read transducers is different than a resistivity of the tunnel valve structure of the second read transducer.
An apparatus, comprising:
- a module having an array of first read transducers each having a tunnel valve structure and a second read transducer coupled to the array of first read transducers, the second read transducer each having a tunnel valve structure;
- and
- a controller and a cable coupling the read transducers to the controller, thereby forming a plurality of circuits extending from the controller, each circuit corresponding to one of the transducers,
- wherein resistances of the circuits are about the same,
- wherein an area of a tunnel barrier portion of each first read transducer along a plane of deposition thereof is different than an area of a tunnel barrier portion of the second read transducer along a plane of deposition thereof.
An apparatus, comprising:
- an array of first read transducers, each first read transducer having a tunnel valve structure configured to read data from a magnetic recording medium;
- and
- a servo read transducer coupled to the array of first read transducers, the servo read transducer having a tunnel valve structure configured to read servo data from a magnetic recording medium,
- wherein a resistance of each first read transducer is substantially the same as a resistance of the servo read transducer,
- wherein an area of a tunnel barrier portion of each first read transducer along a plane of deposition thereof is different than an area of a tunnel barrier portion of the servo read transducer along a plane of deposition thereof.
Dependencies are inferred from the claim text.