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UV-Induced Polymerization of Chemically Bonded Lubricant Films onto Thin-Film Magnetic Recording Disks

IP.com Disclosure Number: IPCOM000105657D
Original Publication Date: 1993-Aug-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Baum, TH: AUTHOR [+4]

Abstract

This disclosure demonstrates demonstrate that in-vacuo, UV induced polymerization of vapor-phase or surface adsorbed fluorinated organic monomers can produce very durable lubricating films on vacuum are covalently bonded to the disk carbon overcoat and require no additional liquid lubrication to obtain excellent tribological performance.

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UV-Induced Polymerization of Chemically Bonded Lubricant Films onto Thin-Film Magnetic Recording Disks

      This disclosure demonstrates demonstrate that in-vacuo, UV
induced polymerization of vapor-phase or surface adsorbed fluorinated
organic monomers can produce very durable lubricating films on vacuum
are covalently bonded to the disk carbon overcoat and require no
additional liquid lubrication to obtain excellent tribological
performance.

      The following example serves to demonstrate the general
approach and several modifications can be envisioned.  A carbon
overcoated thin film magnetic recording disk is placed in a vacuum
chamber and evacuated to a pressure of less than 10 sup -3 Torr,
preferably less than 10 sup -5 Torr.  The disk surface is then
irradiated with a UV source.  Appropriate sources include, but are
not limited to:  a) low pressure Hg resonance lamp, b) excimer laser,
c) Deuterium lamp, d) Xe flash lamp, e) frequency doubled Ar+ laser,
and f) He-Cd laser.  The polymerizable monomeric precursor gas is
introduced into the vacuum chamber at a pressure of ranging from 1 -
10 sup -4 Torr.  The optimum wavelength used, the precursor vapor
pressure, and the desired film thickness.  Following deposition, the
precursor gas inlet is closed and the UV light is subsequently turned
off.  The resultant polymer film is bonded to the disk, i.e. the
polymer film is bonded to the disk, i.e. the polymer film is not
subsequently turned off.  The resu...