| 摘要 |
A signal recording medium capable of being strongly secured to a rotation part such as a disc table even on high-speed rotation. A floppy disc includes a hub at its center portion and a disc substrate having in its disc-shaped main portion a circular opening operating as a mounting portion for the hub and also having a signal recording surface on the disc-shaped main portion. The hub includes an abutment surface abutted against the disc table rotated in unison with the floppy disc and a facing suction surface spaced apart from a suction magnet mounted on a rim portion of the disc table when the abutment surfaces is abutted against a hub setting surface of the disc table.
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