Browse Prior Art Database

Molecular Ball Bearing System for Magnetic Head/Disk Interface

IP.com Disclosure Number: IPCOM000113200D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Bandara, U: AUTHOR [+3]

Abstract

The soild and liquid lubricant is replaced by hard elastic (nano) ball bearing system. The ball bearings are basically the

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Molecular Ball Bearing System for Magnetic Head/Disk Interface

      The soild and liquid lubricant is replaced by hard elastic
(nano) ball bearing system.  The ball bearings are basically the

Buckminster type fullerene molecules or their derivatives with around
60 carbon atoms.  These spheres accommodate for the shear forces
between the head and disk surface, thus protecting both of the
surfaces against wear, as in the conventional mechanical ball bearing
systems.

The adhesion of the balls to the disk surface is achieved by several
alternative ways:

1.  Fabrication of Buchminster fullerene after sputtering
    monomolecular layers of carbon to the surface in the same
    sputtering device.  That is the simultaneous usage of electric
    arcs on graphite poles in the apparatus where the carbon coating
    of the disk surface is sputtered.

2.  Electrostatic adhesion between a polarized surface and a charged
    fullerene sphere, with the charge obtained by inclusion of
    metallic cations into the fulleren sphere.  The included atoms
    are of the type Li+, K+ and the gegenions are located in the
    surface.

3.  Covalent bonding of balls to linear polymeric chains, with their
    other end being chemically bonded to the surfaces.  (Metal
    coordination to unsaturated carbon bonds as shown in Figs. 1 and
    2).

      The fulleren ion formation is achieved by including an atomic
or a molecular ion into the hole space insi...