Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1989-01-26
1991-07-09
Cashion, Jr., Merrell C.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428694, 428699, 428408, 20419215, G11B 2300
Patent
active
050304941
ABSTRACT:
A thin film metal alloy magnetic recording disk has an improved protective overcoat which is both wear resistant and which creates a low level of stiction in a rigid disk file. In a preferred embodiment the overcoat is a film of essentially amorphous carbon or hydrogen-containing carbon with relatively small amounts of additives of iron (Fe), tungsten (W) or tungsten-carbide (WC). The structure of the overcoat is a relatively smooth planar carbon surface with discrete clusters of the additives which project slightly above the smooth carbon surface. The specific additives to the carbon overcoat improve the wear resistance of the disk and permit the sliders to contact the disks in contact start/stop (CSS) operation without damage to any of the disk file components.
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Ahlert Richard H.
Howard James K.
Kim Kwang K.
Sanders Ian L.
Wu Anthony W.
Berthold Thomas R.
Cashion Jr. Merrell C.
International Business Machines - Corporation
Resan Stevan A.
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