Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2005-04-08
2008-10-21
Castro, Angel A (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
07440240
ABSTRACT:
Embodiments of the invention provide a spin-valve type magnetic head that satisfies the requirements of both high read output and stability with narrow tracks. In one embodiment, a domain control film is formed on a magnetoresistive layered film in the same track width. A double closed flux path structure that uses three magnetic layers is employed with magnetic coupled structure in both ends of the track. The three magnetic layers are a soft magnetic free layer, a domain-stabilization ferromagnetic layer, and a soft magnetic anti-parallel layer.
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Hatatani Masahiko
Hoshino Katsumi
Hoshiya Hiroyuki
Meguro Kenichi
Castro Angel A
Hitachi Global Storage Technologies - Netherlands B.V.
Nader Rambod
Townsend and Townsend / and Crew LLP
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