Information medium substrate and information medium

Details Information medium substrate and information medium Information medium substrate and information medium

2011-08-02

2011-08-02

Bernatz, Kevin M. (Department: 1785)

Stock material or miscellaneous articles

Magnetic recording component or stock

Magnetic recording media substrate

C428S848100, C360S099050, C360S135000, C369S280000

Reexamination Certificate

active

07989099

ABSTRACT:
An information medium substrate is formed as a flat plate and includes a first convex part formed on one surface of the information medium substrate in a region between a rim part of a center hole and an inner circumferential edge of an information region and a second convex part formed on another surface of the information medium substrate at a position that overlaps a protruding end part of the first convex part in a thickness direction of the information medium substrate.

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Kozo et al; JP 2001-043570; Feb. 2001 Abstract.
Kozo et al; JP 2001-043570; Feb. 2001 Machine English Translation.

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