Dynamic magnetic information storage or retrieval – Record medium – Disk
Patent
1998-03-24
2000-03-14
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record medium
Disk
G11B 582
Patent
active
060381132
ABSTRACT:
A magnetic disk for writing and reading information by a contact reading method comprises a plurality of asperities upon the surface of the disk. For extending the life of the disk by reducing wear, the plurality of asperities are fabricated such that the average radius of curvature of the plurality of asperities is greater than one thousand times the maximum height of the plurality of asperities on the surface. This ratio between the radius of curvature of the asperities and the surface relief of the asperities ensures a smooth surface and an extended wear life for the magnetic disk.
REFERENCES:
patent: 5768076 (1998-06-01), Baumgart
patent: 5800931 (1998-09-01), Lee
patent: 5824387 (1998-10-01), Boutaghou
Hoshina Shigeru
Tanimoto Kazushi
Heinz A. J.
Kabushiki Kaisha Toshiba
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