Dynamic magnetic information storage or retrieval – Head – Coil
Reexamination Certificate
2008-01-24
2011-10-11
Castro, Angel A. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Coil
C029S603240
Reexamination Certificate
active
08035921
ABSTRACT:
A perpendicular magnetic recording head includes a main pole, a return yoke forming a magnetic path with the main pole, and a coil encompassing the main pole in a solenoid structure to allow the main pole to generate a magnetic field that records information on a recording medium is provided. When a side of the main pole toward the return yoke is an upper portion of the main pole and a side of the main pole opposite to the return yoke is a lower portion of the main pole, the coil includes a lower wire portion passing through the lower portion of the main pole, an upper wire portion passing through the upper portion of the main pole, and a connection portion electrically connecting the lower wire portion and the upper wire portion, and the upper wire portion includes an upper wire layer having at least two layers. The structure may improve a high frequency recording characteristics required for achieving a high recording density.
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Castro Angel A.
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
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