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Lubricating Overcoats for Magnetic Recording Heads

IP.com Disclosure Number: IPCOM000117494D
Original Publication Date: 1996-Mar-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Crowder, MS: AUTHOR [+2]

Abstract

The mechanical performance of a Head-Disk Interface (HDI) can be improved dramatically by providing a thin (<100 Angstrom) lubricating layer to the surface of the magnetic recording head. This polymeric layer can either be a liquid or a solid and be produced using a variety of techniques, including: (a) vapor-phase deposition of, e.g., perfluoropolyethers; (b) ultraviolet-assisted deposition of either monomeric or polymeric compounds; (c) ion beam-assisted deposition/ polymerization; (d) electron beam evaporation; or (e) Plasma-Enhanced Chemical Vapor Deposition (PECVD).

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Lubricating Overcoats for Magnetic Recording Heads

      The mechanical performance of a Head-Disk Interface (HDI) can
be improved dramatically by providing a thin (<100 Angstrom)
lubricating layer to the surface of the magnetic recording head.
This polymeric layer can either be a liquid or a solid and be
produced using a variety  of techniques, including: (a) vapor-phase
deposition of, e.g., perfluoropolyethers; (b) ultraviolet-assisted
deposition of either monomeric or polymeric compounds; (c) ion
beam-assisted deposition/ polymerization; (d) electron beam
evaporation; or (e) Plasma-Enhanced Chemical Vapor Deposition
(PECVD).

      For the purpose of demonstration, sliders were overcoated
with a fluoro-polymer created using either an ion beam-assisted
polymerization process or via a PECVD process.  Suspended magnetic
recording heads were placed in a high vacuum chamber with the
air-bearing surface oriented at normal incidence to an ion beam
source.  A mixture of Argon + pentafluorostyrene (PFS) was added to
the chamber to bring the total pressure to 5 x 10(-4) Torr.  Ions
created in the ion source were accelerated to nominally 600 V and
used to initiate polymerization from PFS.  Typical deposition rates
from this process range from 10-20 Angstrom-sec(-1) with total
deposited fluoro-polymer film thicknesses in the range of 25-100
Angstrom.

      The lubricated sliders were evaluated via contact start/stop
testing on thin film disks lubricated with either...