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US 6,064,552 AGranted
Magnetoresistive head having magnetic yoke and giant magnetoresistive element such that a first electrode is formed on the giant magnetoresistive element which in turn is formed on the magnetic yoke which acts as a second electrode
AssigneeKabushiki Kaisha Toshiba
InventorsHitoshi Iwasaki, Yuzo Kamiguchi, Masashi Sahashi, Hiroaki Yoda
Life of this patent
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Abstract
A magnetoresistive head comprising, a magnetic yoke defining a magnetic gap for guiding signal magnetic fields from a recording medium at the air-bearing surface, a giant magnetoresistive element magnetically coupled with the magnetic yoke at a position remote from the air-bearing surface, and means for supplying a sense current in a direction substantially perpendicular to the surface of the giant magnetoresistive element.
Claims37
A magnetoresistive head comprising:
- a magnetic yoke defining a magnetic gap for guiding a signal magnetic field from a recording medium at an air-bearing surface;
- a giant magnetoresistive element formed on said magnetic yoke and magnetically coupled with said magnetic yoke at a position remote from the air-bearing surface;
- and
- electrodes for supplying a sense current in a direction perpendicular to a film surface of said giant magnetoresistive element, one of said electrodes being formed on said giant magnetoresistive element and another of said electrodes consisting of said magnetic yoke.
1 more element
A magnetoresistive head comprising:
- a magnetic yoke defining a magnetic gap for guiding a signal magnetic field from a recording medium at an air-bearing surface;
- a giant magnetoresistive element magnetically coupled with said magnetic yoke at a position remote from the air-bearing surface, said giant magnetoresistive element comprising a granular magnetic film having a structure in which magnetic grains are dispersed in a non-magnetic matrix;
- and
- electrodes for supplying a sense current in a direction perpendicular to a film surface of said giant magnetoresistive element, one of said electrodes being formed on said giant magnetoresistive element and another of said electrodes consisting of said magnetic yoke.
1 more element
A magnetoresistive head comprising:
- a magnetic yoke defining a magnetic gap for guiding a signal magnetic field from a recording medium at an air-bearing surface;
- a giant magnetoresistive element magnetically coupled with said magnetic yoke at a position remote from the air-bearing surface, said giant magnetoresistive element comprising a stacked structure of a field detection layer, a non-magnetic layer made of a semiconductor or an insulator, and a magnetization fixed layer;
- and
- electrodes for supplying a sense current in a direction perpendicular to a film surface of said giant magnetoresistive element, one of said electrodes being formed on said giant magnetoresistive element and another of said electrodes consisting of said magnetic yoke.
1 more element
A hard disk drive comprising a magnetic recording medium and a magnetoresistive head, the magnetoresistive head comprising:
- a magnetic yoke defining a magnetic gap for guiding a signal magnetic field from a recording medium at an air-bearing surface;
- a giant magnetoresistive element formed on said magnetic yoke and magnetically coupled with said magnetic yoke at a position remote from the air-bearing surface;
- and
- electrodes for supplying a sense current in a direction perpendicular to a film surface of said giant magnetoresistive element, one of said electrodes being formed on said giant magnetoresistive element and another of said electrodes consisting of said magnetic yoke.
1 more element
A hard disk drive comprising a magnetic recording medium and a magnetoresistive head, the magnetoresistive head comprising:
- a magnetic yoke defining a magnetic gap for guiding a signal magnetic field from a recording medium at an air-bearing surface;
- a giant magnetoresistive element magnetically coupled with said magnetic yoke at a position remote from the air-bearing surface, said giant magnetoresistive element comprising a granular magnetic film having a structure in which magnetic grains are dispersed in a non-magnetic matrix;
- and
- electrodes for supplying a sense current in a direction perpendicular to a film surface of said giant magnetoresistive element, one of said electrodes being formed on said giant magnetoresistive element and another of said electrodes consisting of said magnetic yoke.
1 more element
A hard disk drive comprising a magnetic recording medium and a magnetoresistive head, the magnetoresistive head comprising:
- a magnetic yoke defining a magnetic gap for guiding a signal magnetic field from a recording medium at an air-bearing surface;
- a giant magnetoresistive element magnetically coupled with said magnetic yoke at a position remote from the air-bearing surface, said giant magnetoresistive element comprising a stacked structure of a field detection layer, a non-magnetic layer made of a semiconductor or an insulator, and a magnetization fixed layer;
- and
- electrodes for supplying a sense current in a direction perpendicular to a film surface of said giant magnetoresistive element, one of said electrodes being formed on said giant magnetoresistive element and another of said electrodes consisting of said magnetic yoke.
1 more element
Dependencies are inferred from the claim text.