Thin-film magnetic head having the length of the pinned and...

Details Thin-film magnetic head having the length of the pinned and... Thin-film magnetic head having the length of the pinned and...

2007-03-13

2007-03-13

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S324120

Reexamination Certificate

active

10652517

ABSTRACT:
In the thin-film magnetic head of the present invention, the length of each of a pinned layer and an antiferromagnetic layer in their contact area in the depth direction from a surface facing a medium is longer than the length of a free layer in the same direction. When the length of the pinned layer in the depth direction is set longer as such, the direction of magnetization of the pinned layer can be restrained from being tilted by disturbances. Also, the pinned layer and the antiferromagnetic layer have the same length in their contact area in the MR height direction, so that the pinned layer is in contact with the antiferromagnetic layer throughout its length in the MR height direction, thus raising the exchange coupling force, whereby the inclination in the direction of magnetization can be suppressed more effectively.

REFERENCES:
patent: 6381107 (2002-04-01), Redon et al.
patent: 6636395 (2003-10-01), Terunuma
patent: 6728079 (2004-04-01), Shimazawa
patent: 2004/0207962 (2004-10-01), Saito et al.
patent: 7-272221 (1995-10-01), None
patent: 2000-311317 (2000-11-01), None
patent: A 2001-203408 (2001-07-01), None

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