Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2006-02-07
2006-02-07
Tupper, Robert S. (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
06995949
ABSTRACT:
A magnetic head includes a main pole having a first portion with a length (W1) in a cross-track direction which continuously increases from a leading edge side to a trailing edge side, a second portion formed on a trailing edge side of the first portion, and a third portion formed on a trailing edge side of the second portion. A length (W2) in the cross-track direction of a boundary line between the second portion and the third portion is longer than W1, and a length (W3) in the cross-track direction of a trailing edge of a third portion is substantially equal to W2.
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“Drive Integration Challenges for Perpendicular Recording”, S. Lambert et al, Advanced Development Labs., Quantum Corp., Milpitas, CA, pp. 131-132, 2000.
Etoh Kimitoshi
Kawato Yoshiaki
Mochizuki Masafumi
Nakamura Atsushi
Nunokawa Isao
Antonelli Terry, Stout and Kraus, LLP
Hitachi , Ltd.
Tupper Robert S.
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