Browse Prior Art Database

Vapor Phase Lubrication of Magnetic Recording Sliders

IP.com Disclosure Number: IPCOM000116837D
Original Publication Date: 1995-Nov-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Gregory, TA: AUTHOR [+2]

Abstract

Methods for lubricating magnetic recording sliders before file assembly are disclosed.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Vapor Phase Lubrication of Magnetic Recording Sliders

      Methods for lubricating magnetic recording sliders before file
assembly are disclosed.

      The magnetic recording sliders should be lubricated before they
are loaded onto the disks.  This cannot be done by dipping them into
a solution containing lube, as is done for disks, because there are
many places in the complex structure of the head where solution will
be trapped.  This will leave big pockets of lube which will slowly
diffuse out later and cause stiction.  A possible remedy would be to
dip, bake (to create a thermally bonded layer), and then rinse
thoroughly with distilled solvent to remove all mobile lube.

      It is better to apply a thin adsorbate film of lubricant via
the vapor phase.  This has been done with stearic acid.  For the
Perfluoropolyether (PFPE) lube system, the molecules are larger, so
the processing parameters would be different than they are for
stearic acid.  The parameters that determine the resulting thickness
are: temperature difference between the slider and the lube source,
time of exposure, temperature, convection efficiency, ambient
pressure.  This can result in a bonded layer with a mobile layer.

      Another method of lubing the slider is to slide it on a lubed
surface.  This mechanically applies a thin film of lube to the slider
air bearing surface (ABS).  It is not limited to lower molecular
weight and is very fast.  A thermal treatment may be used to
establish the bonded layer and evaporate lower weight molecules.

      The lubing may be done at the actuator level, after the final
cleaning has been done.  For a dipping method, the actuators would be
held heads down and dipped until the sliders are completely
submerged. ...