Magnetic recording disk

Details Magnetic recording disk Magnetic recording disk

1986-10-15

1988-10-18

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

Disk

G11B 582

Patent

active

047791608

ABSTRACT:
A magnetic recording disk comprises a disk base which is provided with a central opening and an annular recess formed on at least one side thereof between the inner peripheral edge portion surrounding the central opening and the outer peripheral edge portion along the outer periphery of the disk base, and a flexible magnetic sheet which has a shape conforming to the shape of the disk base and is bonded to the disk base over the annular recess along the inner peripheral edge portion and the outer peripheral edge portion. The thickness of the portion of the disk base corresponding to the annular recess is larger at the outer part than at the inner part.

REFERENCES:
patent: 3462817 (1969-08-01), Horsfall
patent: 4631609 (1986-12-01), Erickson

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