Yoke type magnetoresistance head and manufacturing method of the same
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United States of America Patent
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-
Jul 10, 2001
Grant Date -
N/A
app pub date -
Mar 11, 1997
filing date -
Mar 12, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic yoke having a magnetic gap provided in the side of the surface facing the medium is disposed on the surface of a substrate. An MR film is disposed on the surface of the magnetic yoke substantially parallel to the substrate with a predetermined separation from the surface S facing the medium. At least both end portions of the MR film are magnetically coupled to the magnetic yoke. A pair of leads for supplying sensing current to the MR film have magnetic lead portions formed from the same magnetic layers as the magnetic yoke. The magnetic lead portions curb deterioration of MR head properties and yield reduction during formation of the leads. Furthermore, a bias magnetic field is applied to the magnetic yoke and the MR film at least during operation of the head. This bias magnetic field is for instance provided by a magnetic field induced by the electric current. Alternatively, a magnetic field induced by the electric current is applied while heat-processing the magnetic yoke. Magnetic anisotropy is induced to the magnetic yoke in a direction differing according to the position. This magnetic anisotropy curbs Barkhausen noise caused by the magnetic yoke.
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