Discs for memory storage devices

Details Discs for memory storage devices Discs for memory storage devices

1993-01-25

1993-12-28

Group, Karl

Stock material or miscellaneous articles

Composite

Of inorganic material

428 66, 428426, 501 3, 501 32, C03C 1014

Patent

active

052738345

ABSTRACT:
This invention is directed to the fabrication of magnetic memory storage devices which consist essentially of a head pad and a rigid information disc, that disc consisting essentially of a rigid substrate having a layer of magnetic media joined to the surface of said substrate through an underlayer. The invention is particularly drawn to the substrate for the information disc which is composed of a glass-based material containing 0.05-2% by weight total of cobalt oxide and/or iron oxide and/or nickel oxide. The most preferred glass-based material comprises a glass-ceramic wherein canasite constitutes the predominant crystal phase.

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S. L. Duan et al., "Study of the Growth Characteristics of Sputtered Cr Thin Films", Journal of Applied Physics, 67, (9), pp. 4913-15, May 1, 1990.

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