Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-08-22
2006-08-22
Wong, K. (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S135000
Reexamination Certificate
active
07095581
ABSTRACT:
A convex structure, where a servo signal is recorded, of a perpendicular magnetic recording medium is set to a truncated quadrangular pyramid shape and a specification of the truncated quadrangular pyramid shape and so forth are determined according to properties of the perpendicular magnetic recording medium to be used, so that the influence of a demagnetizing field that accelerates thermal fluctuation of the perpendicular magnetic recording medium can be reduced in a servo area of the medium which is most affected by the thermal fluctuation of the medium. Therefore, it is possible to provide a magnetic recording and reproducing apparatus having the magnetic recording medium that can suppress degradation of the servo signal caused by the thermal fluctuation of magnetization of perpendicular magnetic recording layers forming a convex-concave structure in the servo area to thereby ensure a stable servo function over the long term.
REFERENCES:
patent: 5590009 (1996-12-01), Ishida
patent: 6051299 (2000-04-01), Uchiyama et al.
patent: 6242085 (2001-06-01), Ryonai et al.
patent: 6440589 (2002-08-01), Fullerton et al.
patent: 6583957 (2003-06-01), Takeshita et al.
patent: 6586044 (2003-07-01), Takeshita et al.
patent: 6602620 (2003-08-01), Kikitsu et al.
patent: 2004/0091748 (2004-05-01), Kamata et al.
patent: 2004/0166376 (2004-08-01), Kirino et al.
patent: 2004/0191557 (2004-09-01), Kamata et al.
patent: 2005/0214520 (2005-09-01), Oikawa et al.
patent: 6-111502 (1994-04-01), None
patent: 10-222944 (1998-08-01), None
patent: 11-328662 (1999-11-01), None
patent: 2000-195042 (2000-07-01), None
Habermehl James L
TDK Corporation
Wong K.
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