Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1999-02-22
2000-08-29
Pianalto, Bernard
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
2041921, 427131, 427132, 428693, 428694ST, 428697, 428699, 428701, 428702, 428900, B32B 302
Patent
active
061105570
ABSTRACT:
A very-high-performance ultrahigh-density vertical-magnetic-recording disk and associated method of manufacture is disclosed. The magnetic-recording disk has a rigid disk-shaped substrate composed of a titanium alloy or an austenitic stainless steel, an iron oxide layer overlying one or both surfaces of the substrate, and a barium ferrite layer overlying the iron oxide layer. The iron oxide and barium ferrite layers are applied by high-radiofrequency sputtering with high-radiofrequency substrate biasing.
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Nelson Carl W.
Weir Richard D.
Pianalto Bernard
Titanium Memory Systems, Inc.
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