Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2007-01-02
2007-01-02
Davis, David (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
11195782
ABSTRACT:
A magnetic recording head includes an upper shield layer, a lower shield layer, a magnetoresistive film interposed between the upper shield layer and the lower shield layer, and a pair of leads electrically coupled to the magnetoresistive film, in which a pair of side shield layers constituted by portions of the upper shield layer is formed on both sides of the magnetoresistive film, and a spacing between each side shield layer and the magnetoresistive film is formed to be narrower than twice of a spacing between the upper shield layer and the lower shield layer, thereby a side reading amount can be made smaller than a conventional side reading value determined from the spacing between the upper and lower shield layers and a magnetic spacing between the head and a medium.
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patent: 6980403 (2005-12-01), Hasegawa
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Thomas C. Anthony, Steven L. Naberhuis, James A. Brug, Manoj K. Bhattacharyya, Lung T. Tran, Victor W. Hesterman and Gerald G. Lopatin, “Dual Strip Magnetoresistive Heads for High Density Recording”, IEEE Transactions on Magnetics, vol. 30, No. 2, Mar. 1994, pp. 303-308.
Hoshiya Hiroyuki
Ishikawa Chiaki
Nakamoto Kazuhiro
A. Marquez, Esq. Juan Carlos
Davis David
Fisher Esq. Stanley P.
Hitachi Global Storage Technologies
Reed Smith LLP
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