Disk-type recording medium and storage apparatus

Details Disk-type recording medium and storage apparatus Disk-type recording medium and storage apparatus

1991-09-13

1993-12-21

Porta, David P.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9802, 360 9808, G11B 5016

Patent

active

052725812

ABSTRACT:
A disk-type recording medium having a circular substrate on which a recording layer is formed does not include any through hole formed in the center of rotation. Since no through hole is formed, it is possible to improve the reliability of the medium with regard to its strength, and to reduce the thickness of the substrate. Further, it is possible to render the thickness of the recording coating uniform.

REFERENCES:
patent: 3537083 (1970-10-01), Voth
patent: 4652499 (1987-03-01), Howard
patent: 5016128 (1991-05-01), DiIorio et al.
"Glass Substrate Disk", IBM Technical Disclosure Bulletin, vol. 12, No. 6, Nov. 1969, p. 766, B. Brezoczky.

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