Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1999-04-01
2000-08-08
Resan, Stevan A.
Stock material or miscellaneous articles
Composite
Of inorganic material
428694TF, 428900, 250307, G11B 571
Patent
active
060999810
ABSTRACT:
In a magnetic recording medium including a nonmagnetic substrate on which a magnetic layer, a protection film, and a lubricant film are successively stacked, the lubricant film is formed by quantitatively controlling an amount of a lubricant in consideration of a surface coverage ratio of the lubricant film relative to the protection film and an average thickness of the lubricant film. Preferably, the surface coverage ratio is selected between 0.55 and 0.985 while the average thickness is not smaller than 0.4 time an attenuation length of a photoelectron which is emitted from a predetermined element and which is attenuated in the lubricant film. To this end, an x-ray photoelectron spectroscopy is used to evaluate the lubricant film.
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Journal of Applied Physics, vol. 69, No. 12, pp. 8042-8046, XP 000237525, Characterization of Lubrication States on Carbon Coated Media by Low Energy Photoelectron Spectroscopy Method in Ambient Atmosphere.
T. Miyamoto, et al "Friction and Wear Characteristics of Thin Film Disk Media in Boundary Lubrication"; Tribology and Mechanics of Magnetic Storage Systems; vol. V; pp. 55-61.
K. Merchant, et al; "Lubricant Bonding and Orientation on Carbon Coated Media"; IEEE Transactions on Magnetics, vol. 26; No. 5; Sep. 1990; pp. 2688-2690.
Hoya Corporation
Resan Stevan A.
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