Dynamic magnetic information storage or retrieval – Record medium – Disk
Patent
1997-12-03
2000-08-22
Letscher, George J.
Dynamic magnetic information storage or retrieval
Record medium
Disk
360131, 427554, 427555, G11B 582
Patent
active
061081698
ABSTRACT:
A device and method for storing magnetically readable data are provided, the device including a disk having a substantially rigid, non-magnetizable substrate having a substantially planar surface and a magnetizable film having a substantially uniform thickness formed over the substantially planar surface. The disk has an outer surface having a nominal surface plane, and the outer surface includes a plurality of marks, each having a bump height above the nominal surface plane, a crater depth below the nominal surface plane, a mark radius, a bump radius of curvature, a crater radius of curvature and a separation from a consecutive mark, and at least one of the bump height, the crater depth, the mark radius, the bump radius of curvature, the crater radius of curvature and the separation is substantially randomly distributed according to any distribution of random variables such as, for example, a Gaussian normal, uniform, Poisson-like or Bernoulli-like binomial-like distribution.
REFERENCES:
patent: 5768076 (1998-06-01), Baumgart et al.
Hearn Patrick L.
Liu Hain-Ling
Viswanathan Kannimangalam V.
Letscher George J.
Quantum Corporation
Roeder Steven G.
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