Dynamic magnetic information storage or retrieval – Record medium – Disk
Reexamination Certificate
2005-09-14
2010-06-29
Feild, Joseph H (Department: 2627)
Dynamic magnetic information storage or retrieval
Record medium
Disk
C369S275100, C369S275400, C369S044270, C360S133000
Reexamination Certificate
active
07746598
ABSTRACT:
An information recording medium excellent in surface smoothness. The information recording medium has a data track pattern and a servo pattern formed on at least one surface of a substrate by a concave/convex pattern including a plurality of convex portions. The concave/convex pattern has concave portions each having a non-magnetic material embedded therein. An A concave/convex pattern forming the servo pattern includes a plurality of servo convex portions formed in a manner associated with servo data. At least part of the plurality of servo convex portions are formed by a B concave/convex pattern including a plurality of non-servo convex portions. This arrangement makes it possible to maintain excellent surface smoothness within a servo pattern area, thereby enabling the recording/reproducing apparatus to execute stable recording and reproducing on and from the information recording medium.
REFERENCES:
patent: 5540966 (1996-07-01), Hintz
patent: 5828536 (1998-10-01), Morita
patent: 5986833 (1999-11-01), Higurashi
patent: 6014296 (2000-01-01), Ichihara et al.
patent: 6088200 (2000-07-01), Morita
patent: 7403355 (2008-07-01), Soeno et al.
patent: 7477485 (2009-01-01), Soeno et al.
patent: 7554768 (2009-06-01), Soeno et al.
patent: 2002/0057509 (2002-05-01), Nishida et al.
patent: 2004/0175510 (2004-09-01), Hattori et al.
patent: 2005/0045583 (2005-03-01), Fujita et al.
patent: 2005/0117253 (2005-06-01), Moriya et al.
patent: 2005/0219730 (2005-10-01), Sakurai et al.
patent: 9-97419 (1997-04-01), None
patent: 9-138927 (1997-05-01), None
patent: 2002-150729 (2002-05-01), None
English language Abstract of JP 9-97419.
English language Abstract of JP 2002-150729.
U.S. Appl. No. 11/085,522 to Takai et al., which was filed on Mar. 22, 2005.
U.S. Appl. No. 11/214,813 to Soeno et al., which was filed on Aug. 31, 2005.
U.S. Appl. No. 11/214,827 to Soeno et al., which was filed on Aug. 31, 2005.
U.S. Appl. No. 11/229,650 to Soeno et al., which was filed on Sep. 20, 2005.
English language Abstract of JP 9-138927.
Moriya Makoto
Tagami Katsumichi
Feild Joseph H
Greenblum & Bernstein P.L.C.
Lee Nicholas
TDK Corporation
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