Information recording disk

Details Information recording disk Information recording disk

1992-07-29

1993-11-23

Wysocki, Jonathan

Dynamic information storage or retrieval

Storage medium structure

Layered

369272, 369282, 369289, 360135, G11B 370

Patent

active

052650863

ABSTRACT:
An information recording disk formed from two substrates with a stepped central opening for receiving a hub within the stepped recess of at least one of the substrates is provided. In one embodiment, the central aperture of the first substrate is larger than the central aperture of the second substrate to form the stepped recess. In another embodiment, at least one substrate has a stepped surface defining a central aperture and a hub structure is mounted within this stepped recess to reduce overall thickness of the disk.

REFERENCES:
patent: 4641152 (1987-02-01), Fedder et al.
patent: 4785444 (1988-11-01), Nakama et al.
patent: 4827468 (1989-05-01), Odawara et al.
patent: 4827470 (1989-05-01), Odawara et al.

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