Dynamic magnetic information storage or retrieval – Record medium – Disk
Reexamination Certificate
2007-03-22
2010-11-02
Renner, Craig A. (Department: 2627)
Dynamic magnetic information storage or retrieval
Record medium
Disk
C428S833200, C428S834000
Reexamination Certificate
active
07826176
ABSTRACT:
A magnetic recording media includes a toroidal substrate, a surface thereof is divided into a recording area located in a central part between an outer peripheral edge and an inner peripheral edge, edge areas located within 100 μm or more and 2,000 μm or less from the outer and inner peripheral edges, respectively, and adjacent areas located between the edge areas and the recording area, respectively, a magnetic film on the substrate, and a protective film on the magnetic film, in which the magnetic film is thinner in the edge areas than that in the adjacent areas, and at least a part of the protective film in the edge areas is thicker than that in the adjacent areas.
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Kamata Yoshiyuki
Kikitsu Akira
Kimura Kaori
Sakurai Masatoshi
Shirotori Satoshi
Kabushiki Kaisha Toshiba
Nixon & Vanderhye PC
Renner Craig A.
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