Magnetic storage medium and magnetic recording device

Details Magnetic storage medium and magnetic recording device Magnetic storage medium and magnetic recording device

2011-04-05

2011-04-05

Sniezek, Andrew L (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S075000

Reexamination Certificate

active

07920348

ABSTRACT:
A patterned media type magnetic storage medium has separated magnetic dots formed a data area having a first magnetic dots and a servo area. The micro position detection portion in the servo area is constructed with first and second dot arrays having a different number of second magnetic dots in the circumference direction and face with the center line that the first magnetic dots of the data area in the magnetic storage medium are disposed, as the axis. The area of the magnetic dot constituting the micro position detection portion of the servo area is small, so the coercive force of the servo area increases. The frequency is changed depending on the number of magnetic dots, and the phase is changed depending on the position of the magnetic dot array in the radius direction with the center line as an axis.

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patent: 2006/0280974 (2006-12-01), Okino et al.
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patent: A 2003-109333 (2003-04-01), None
patent: A 2006-344328 (2006-12-01), None

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