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Deposition of Lubricating Films on Electrically Biased Thin-Film Disks

IP.com Disclosure Number: IPCOM000105446D
Original Publication Date: 1993-Aug-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Crowder, MS: AUTHOR [+4]

Abstract

Disclosed is a method to deposit a lubricating film onto a thin-film magnetic recording disk (TFD). The deposition technique involves applying an electrical potential to a TFD in a vacuum chamber (10 sup -3 to 10 sup -4 Torr), in the presence of an inert gas (argon, nitrogen, etc.) and a lubricant precursor gas. The lubricant precursor can consist of monomers, oligomers, telomers and/or poylmers containing Si, C, N, F, O, and II atoms. Examples of preferred precursors are those which contain fluorine, and an easily polymerizable functional group, e.g. alkenes, alkynes, dienes, acrylates, benzoates, etc. When a TFD is electrically biased in the presence of the inert gas/precursor gas mixture, a visible corona is formed around the disk. This discharge induces deposition/polymerization of the precursor on the TFD.

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Deposition of Lubricating Films on Electrically Biased Thin-Film Disks

      Disclosed is a method to deposit a lubricating film onto a
thin-film magnetic recording disk (TFD).  The deposition technique
involves applying an electrical potential to a TFD in a vacuum
chamber (10 sup -3 to 10 sup -4 Torr), in the presence of an inert
gas (argon, nitrogen, etc.) and a lubricant precursor gas.  The
lubricant precursor can consist of monomers, oligomers, telomers
and/or poylmers containing Si, C, N, F, O, and II atoms.  Examples of
preferred precursors are those which contain fluorine, and an easily
polymerizable functional group, e.g.  alkenes, alkynes, dienes,
acrylates, benzoates, etc.  When a TFD is electrically biased in the
presence of the inert gas/precursor gas mixture, a visible corona is
formed around the disk.  This discharge induces
deposition/polymerization of the precursor on the TFD.  Under
appropriate gas voltage conditions, a lubricating film is forced on
the TFD which provides excellent wear durability, and low stiction
during contact start stop testing.