Magnetically anisotropic shield for use in magnetic data...

Details Magnetically anisotropic shield for use in magnetic data... Magnetically anisotropic shield for use in magnetic data...

2006-12-22

2008-10-14

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07436634

ABSTRACT:
A magnetic shield for use in a magnetic head. The magnetic shield has a magnetic anisotropy associated with a magnetic easy axis of magnetization oriented substantially parallel with the air bearing surface. The magnetic anisotropy of the shield is induced by an anisotropic surface texture. This anisotropic surface texture can be formed in a surface of one or more magnetic layers of the shield, or can be formed in a surface of an under-layer on which the shield is deposited. The shield could also be constructed as a lamination of magnetic layers separated by non-magnetic layers, with the anisotropic surface texture being formed on one or more of the non-magnetic layers.

REFERENCES:
patent: 6980403 (2005-12-01), Hasegawa
patent: 6995950 (2006-02-01), Lairson et al.
patent: 7189583 (2007-03-01), Drewes
patent: 2006/0209470 (2006-09-01), Ohta et al.
patent: 2007/0002502 (2007-01-01), Burbank et al.

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