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Post-Deposition Surface Processing of Thin-Film Disks

IP.com Disclosure Number: IPCOM000104239D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 1 page(s) / 31K

Publishing Venue

IBM

Related People

Crowder, MS: AUTHOR [+3]

Abstract

Reactive monomers can form a protective coating when polymerized on thin film magnetic recording disks. It is possible to deposit the polymerized coating directly on the carbon overcoat and slider through slider disk contacts in the presence of vapor phase monomer.

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Post-Deposition Surface Processing of Thin-Film Disks

      Reactive monomers can form a protective coating when
polymerized on thin film magnetic recording disks.  It is possible to
deposit the polymerized coating directly on the carbon overcoat and
slider through slider disk contacts in the presence of vapor phase
monomer.

      A disk drive was set up in a bell jar.  This was pumped down
and then backfilled with Argon and a fluorinated monomer and
Start/Stop tests were carried out.  The crosslinked polymer was
deposited on the disk in the tracks under the slider rails, and the
coating thickness could be controlled by changes in the ambient
pressure and the number of Start/Stop cycles.  The thickness of the
coating was measured by ellipsometry to be as thick as 6 nm, and the
presence of fluorine was detected by X-ray photoemission
spectroscopy.

      Cross-linking was verified by insolubility of the deposit in
known good solvents.  The deposit was also formed during low flying
at reduced ambient pressure.  Since the slider was flown as low as 10
nm during some of the depositions, it seems that this coating would
also protect the disk surface in contact recording.

      This process could, in principle, be used for in-situ
lubrication of disk drives by accessing in the presence of monomer,
followed by purging of the monomer from the drive.

Disclosed Anonymously.