Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2006-05-30
2006-05-30
Evans, Jefferson (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Core
C360S125330
Reexamination Certificate
active
07054105
ABSTRACT:
A magnetic field distribution of a recording head is made linear so that a curvature of the magnetic-transition pattern in recording bit cells can be corrected. In a SPT head having a main pole1and an auxiliary pole3, a magnetic layer32is disposed on a trailing side of the main pole. The magnetic layer is provided with a protruding portion32aprotruding towards the main pole. A width Nw of a side of the protruding portion opposite the main pole of the protruding portion is made smaller than a width Tww of the main pole on the trailing side.
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Etoh Kimitoshi
Mochizuki Masafumi
Nakamura Atsushi
A. Marquez, Esq. Juan Carlos
Evans Jefferson
Fisher Esq. Stanley P.
Hitachi Global Storage Technologies Japan Ltd.
Reed Smith LLP
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