Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1993-09-08
1998-01-13
Kiliman, Leszek
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428694T, 428694TS, 428694ST, 428900, 427129, 427131, 2041921, 20419211, 20419212, 2041922, G11B 566
Patent
active
057077053
ABSTRACT:
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. Precision cold-rolled titanium or titanium alloy is the substrate for a magnetic-recording disk. The surface of the substrate may be hardened by plasma nitriding, plasma carburizing, or plasma carbonitriding. A hard coating may be applied to the substrate by evaporative reactive ion plating or reactive sputtering of aluminum nitride, silicon nitride, silicon carbide, or nitrides, carbides, or borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, or tungsten.
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Nelson Carl W.
Weir Richard D.
Weir Richard S.
Kiliman Leszek
Tulip Memory Systems, Inc.
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