Magnetic head for perpendicular recording with hard bias...

Details Magnetic head for perpendicular recording with hard bias... Magnetic head for perpendicular recording with hard bias...

2007-04-03

2007-04-03

Heinz, A. J. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

C360S128000

Reexamination Certificate

active

10846040

ABSTRACT:
A magnetic head for writing information on a relatively-moving medium is disclosed, the head having a leading end, a trailing end and a medium-facing surface, the head comprising: a soft magnetic write pole that terminates in a pole tip that is disposed adjacent to the medium-facing surface; at least one coil section that is disposed adjacent to the write pole to induce a magnetic flux in the write pole; and a hard magnetic bias structure disposed within one micron of the pole tip to magnetically bias the pole tip.

REFERENCES:
patent: 6185081 (2001-02-01), Simion et al.
patent: 7023660 (2006-04-01), Hsiao et al.
patent: 7070716 (2006-07-01), Lam
K. Nakamoto, et al. Single-Pole/TMR Heads for 140-Gb/in Perpendicular Recording IEEE Transactions on Magnetics, vol. 40 No. 1 Jan. 2004.

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