Magnetoresistance effect head with conductor film pair and magne

Details Magnetoresistance effect head with conductor film pair and magne Magnetoresistance effect head with conductor film pair and magne

1995-12-22

1999-04-20

Renner, Craig A.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

058962514

ABSTRACT:
A magnetoresistance effect head comprises a magnetoresistance effect element portion including a magnetoresistance effect film having a magnetic field response portion, a magnetic field providing film for providing the magnetoresistance effect film with a bias magnetic field, and a conductor film for supplying a current to the magnetoresistance effect film, wherein the magnetoresistance effect element portion has a laminate structure portion being composed of at least the conductor film, the magnetic field providing film, and the magnetoresistance effect film layered in this order at other than the magnetic field response portion. The magnetoresistance effect head is obtained by patterning a laminate film composed of a conductor film and a magnetic field providing film corresponding to a lead shape, forming an MR film, and patterning the MR film corresponding to a lead shape and the shape of a magnetic field response portion. Alternatively, a magnetic field providing film and a conductor film are layered in the order in a passive region other than the magnetic field response portion, forming a laminate film such that the magnetic field providing film is exposed at surface of the edge portion on the magnetic field response portion side. The MR film is formed on almost only the magnetic field response portion so that the MR film overlaps with the exposed portion of the magnetic field providing film.

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Samuel W. Yuan et al., "Micromagnetics of GMR spin-valve heads", J. Appl. Phys. 75 (10), 15 May 1994, pp. 6385 and 6386 and 6387.

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