Bit patterned medium, reading head for reading data recorded...

Details Bit patterned medium, reading head for reading data recorded... Bit patterned medium, reading head for reading data recorded...

2008-03-26

2010-06-29

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S040000, C360S135000

Reexamination Certificate

active

07746589

ABSTRACT:
Provided are a bit patterned medium having a super track, a reading head which reads data recorded on the bit-patterned medium, and a hard disk drive (HDD) for recording/reading data on/from the bit patterned medium. The bit patterned medium includes a substrate, and a recording layer formed with a plurality of bit cells separated from each other along a plurality of tracks forming concentric circles having different radii on the substrate, wherein each track includes a super track including a plurality of sub-tracks, and bit cells formed on one of the sub-tracks are arranged at different positions in a circumference direction of the recording layer to bit cells formed on adjacent sub-tracks. The reading head which reads data recorded on a bit patterned medium has a width in a cross-track direction sufficient for reading data of an equal number of bit cells as the plurality of sub-tracks.

REFERENCES:
patent: 6162532 (2000-12-01), Black et al.
patent: 6937421 (2005-08-01), Rubin et al.
patent: 6977108 (2005-12-01), Hieda et al.
patent: 2007/0258161 (2007-11-01), Richter et al.
patent: 2008/0002269 (2008-01-01), Sakurai et al.

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