G - Physics – 11 – B
Patent
G - Physics
11
B
184/32, 352/31.3
G11B 33/14 (2006.01) G11B 5/40 (2006.01) G11B 5/60 (2006.01) G11B 17/32 (2006.01) G11B 23/50 (2006.01)
Patent
CA 1307339
DOCKET NO. RO986-015 METHOD AND APPARATUS FOR LUBRICATING A MAGNETIC DISK CONTINUOUSLY IN A RECORDING FILE Abstract In a magnetic disk file having a plurality of disks and a source of organic lubricant mounted within a housing, an air flow stream recirculates within the housing. The vapor pressure of the lubricant source is controlled to provide vapor phase transport of lubricant molecules between the source and the disks' recording surfaces. The lubricant molecules bidirectionally transfer between the air stream and the source, and between the air stream and the surface of the disks, as is needed to maintain a mono-molecular lubricant film, in the range of about 3 to 15 angstroms, on the disks in accordance with the principle of Langmuir kinetics. The disks are rigid disks and their recording surface includes a carbon overcoat. This overcoat has an affinity for the airborne organic lubricant molecules. In a first embodiment, the vapor pressure of the lubricant is controlled by mounting the material at the coolest location within the housing. In a second embodiment, the lubricant is carried as a mono-molecular layer of lubricant on granular carbon particles which have a surface area that is many times greater than the surface area of the disks. DOCKET NO. RO986-015 In a third embodiment, the vapor pressure is controlled by combining the lubricant with a vapor pressure diluent.
572710
Gregory Thomas Allen
Keller Christopher Guild
Kennedy Bruce Edward
Murray Bruce Allen
Rothschild Wayne Jay
Barrett B.p.
International Business Machines Corporation
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