Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2004-03-22

2008-08-26

Watko, Julie Anne (Department: 2627)

Dynamic magnetic information storage or retrieval

Record medium

Disk

Reexamination Certificate

active

07417826

ABSTRACT:
A magnetic recording medium on which servo information is recorded efficiently with a sufficient output amplitude for favorable read accuracy of the servo information. In servo areas, a magnetic layer is separated into a plurality of servo pattern unit parts forming a predetermined servo pattern and servo pattern peripheral parts/part surrounding the servo pattern unit parts. The servo pattern unit parts and the servo pattern peripheral parts/part are formed in different sizes so as to have different magnetic properties.

REFERENCES:
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patent: A 2002-359138 (2002-12-01), None
patent: WO 01/43122 (2001-06-01), None
Albrecht et al., “Magnetic coercivity patterns for magnetic recording on patterned media,” Applied Physics Letters, vol. 83, No. 21, Nov. 24, 2003 pp. 4363-4365.

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