Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2007-11-13
2007-11-13
Evans, Jefferson (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
C360S324100, C360S324200
Reexamination Certificate
active
11760254
ABSTRACT:
A magnetoresistance effect element a stacked film including a magnetization fixed layer in which the direction of magnetization is substantially fixed to one direction, and a magnetization free layer in which the direction of magnetization varies in response to an external magnetic field, an electrode connected to a part of a principal plane of the stacked film, the magnetoresistance effect element having a resistance varying in response to a relative angle between the direction of magnetization in the magnetization fixed layer and the direction of magnetization in the magnetization free layer, a sense current detecting the variation of the resistance being applied to the film planes of the magnetization fixed layer and the magnetization free layer via the electrode in a direction substantially perpendicular to the magnetization fixed layer and the magnetization free layer. The electrode includes a pillar electrode portion substantially perpendicularly extending from the principal plane of the stacked film, and a feed portion extending substantially in parallel to the principal plane of the stacked film and the pillar electrode portion has two conductive layers in the central portion and outer peripheral portion thereof, and the sense current being caused to flow in the opposite directions to each other in the central portion and the outer peripheral portion.
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Kamiguchi Yuzo
Nagata Tomohiko
Yoda Hiroaki
Yuasa Hiromi
Evans Jefferson
Kabushiki Kaisha Toshiba
Oblon, Spivak, McCLelland, Maier & Neustadt, P.C.
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