Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2005-10-03
2008-10-21
Castro, Angel A (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
07440241
ABSTRACT:
A magnetoresistive head and a fabricating method thereof accomplishing high read sensitivity and excellent linear response with low noise even if track width narrowing makes progress are provided. In one embodiment, using a magnetoresistive film having a laminated body of a pinned layer/an intermediate layer/a free layer/a separate layer/a first ferromagnetic layer/a 90-degree magnetic interlayer coupling layer/a second ferromagnetic layer, and the magnetizations of both the pinned layer and the second ferromagnetic layer are fixed nearly in the direction along the sensor height. On the other hand, the magnetizations of the first ferromagnetic layer and the second ferromagnetic layer have an interlayer interaction being directed in nearly orthogonal directions to each other through the 90-degree magnetic interlayer coupling layer, and the first ferromagnetic layer has a magnetization directed nearly in the direction along the track width in zero external magnetic field. According to this, the first ferromagnetic layer applies a longitudinal biasing field to the free layer nearly in the direction along the track width.
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Hoshino Katsumi
Hoshiya Hiroyuki
Katada 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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