Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1994-01-20
1997-10-28
Resan, Stevan A.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428141, 428212, 428217, 428336, 428667, 428668, 428694ST, 428694SG, 428694TS, 428698, 428704, 428900, 428922, G11B 566
Patent
active
056816359
ABSTRACT:
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. An electrically conductive hard coating is deposited upon a ceramic substrate. This coating can be one from the group including the nitrides, carbides, and borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, or tungsten. Graded interfacial diffusion or pseudo-diffusion layers are formed between the ceramic substrate and the coating by the elemental metal present in the coating. Magnetic-recording media is then deposited upon the electrically conductive coating. Optionally, a texturable coating that is softer than the hard coating can be placed over the electrically conductive hard coating before the magnetic-recording media is deposited. This texturable coating limits the depth to which abrasive tape texturing can take place.
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Nelson Carl W.
Weir Richard D.
Weir Richard S.
Resan Stevan A.
Tulip Memory Systems, Inc.
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