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Anaerobic Head/Disk Assembly Environment Disclosure Number: IPCOM000063554D
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18

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DePalma, VM Nepala, DA Williams, EM [+details]


Some current magnetic disk files make use of poly (perfluorinated alkyl ether) lubricants. It is known that Lewis acids, such as Fe2O3 and Al2O3, catalyze the decomposition of these classes of compounds. Initiation of the decomposition can come from head-suspension/disk asperity contacts, resulting in an adiabatic temperature increase on the order of 200-300ŒC. Another source, though actually the same from an energy conservation viewpoint, is through mechanical stressing of the polymer by shearing, again in suspension/asperity contacts. Lubricant depletion problems may be dramatically reduced by the use of an anaerobic environment in the head/disk assembly (HDA), for example, a nitrogen atmosphere.