Magnetic recording medium, stamper recording/reproducing...

Details Magnetic recording medium, stamper recording/reproducing... Magnetic recording medium, stamper recording/reproducing...

2006-11-08

2010-10-26

Negrón, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

Record medium

Disk

C360S016000, C360S048000, C360S077080

Reexamination Certificate

active

07821738

ABSTRACT:
Data track pattern regions, in which data track patterns are formed by concave/convex patterns, and servo pattern regions, in which servo patterns are formed by concave/convex patterns, are provided on a magnetic recording medium so as to be alternately disposed in a circumferential direction. At least one predetermined region that differs to the data track pattern regions is provided between two servo pattern regions that are adjacent in a circumferential direction. A concave/convex pattern including a plurality of first convex parts formed continuously in a radial direction is formed in each predetermined region.

REFERENCES:
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patent: 2002/0051307 (2002-05-01), Nishikawa et al.
patent: 2005/0117253 (2005-06-01), Moriya et al.
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patent: 2006/0203368 (2006-09-01), Kaizu et al.
patent: 2006/0203386 (2006-09-01), Soeno et al.
patent: 2006/0250718 (2006-11-01), Nakamura et al.
patent: 2005-166115 (2005-06-01), None
patent: 2005-166116 (2005-06-01), None
U.S. Appl. No. 11/557,571 to Moriya et al., filed Nov. 8, 2006.
U.S. Appl. No. 11/536,954 to Hattori et al., filed Sep. 29, 2006.
U.S. Appl. No. 11/536,846 to Hattori et al., filed Sep. 29, 2006.
English language Abstract of JP 2005-166115.
English language Abstract of JP 2005-166116.

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