Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1995-01-30
1996-02-27
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 539
Patent
active
054953782
ABSTRACT:
An MR sensor having improved current density distribution, reduced overall resistance and a substantially planar surface is disclosed. The MR sensor includes an MR layer having first and second outer regions and an active region located between the first and second outer regions. A first permanent magnet region is formed upon the first MR layer outer region and defines a first boundary of the MR layer active region. A second permanent magnet region is formed upon the second MR layer outer region and defines a second boundary of the MR layer active region so that a gap region is positioned at least partially between the first and second permanent magnet regions. A spacer layer is formed on the MR layer active region between the first and second permanent magnet regions. A soft adjacent layer is formed in the active region and upon the spacer layer, and, in some preferred embodiments, also at least partially upon the permanent magnet region.
REFERENCES:
patent: 4785366 (1988-11-01), Krounbi et al.
patent: 4879619 (1989-11-01), Fontana, Jr. et al.
patent: 5005096 (1991-04-01), Krounbi et al.
patent: 5260652 (1993-11-01), Collver et al.
Bonyhard Peter I.
Dolejsi James F.
Tolman Charles H.
Wood William P.
Seagate Technology Inc.
Wolff John H.
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