Method for manufacturing austenitic stainless steel substrate for magnetic-recording media
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United States of America Patent
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May 4, 1999
Issued Date -
N/A
app pub date -
Jun 3, 1996
filing date -
Aug 2, 1993
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Expired
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Abstract
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. A precision cold-rolled authentic stainless steel 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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