Browse Prior Art Database

Method to Avoid Stiction in the Magnetic Head/Disk System

IP.com Disclosure Number: IPCOM000113040D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Bandara, U: AUTHOR [+3]

Abstract

Proposed is a method to reduce the stiction force between the surfaces of magnetic disk and the slider. The method is non-destructive for the system, and based the known effect of reversible change of viscosity of a dispersion under an electrical field, when the dispersed particles are easily polarizable under an electrical field.

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Method to Avoid Stiction in the Magnetic Head/Disk System

      Proposed is a method to reduce the stiction force between the
surfaces of magnetic disk and the slider.  The method is
non-destructive for the system, and based the known effect of
reversible change of viscosity of a dispersion under an electrical
field, when the dispersed particles are easily polarizable under an
electrical field.

      Materials: As the solvent (the carrier medium), the
conventional type of lubricant, i.e., Oligofluoroethylen or similar
fluoro lubricant (standard lube, state of the art) is used.  The
dispersed particles are spherical poly fluoro ethylene which is
prepared as follows: The fluoro monomere (Fig. 1) is dissolved in the
lubricant.  During this process so-called miscellae (Fig. 2)
structures are formed, where the fluorinated ends of the monomere is
oriented outwards from the center of the sphere.  This suspension is
photo-polymerized (reaction in Fig. 3), in which process the
spherical structures are frozen permanently by the polymerization
reaction in the kernel of the sphere.  The diameter of the spheres
can be adjusted by varying the length of side chain of the monomere.
The Fig. 2 shows the case where the radius is 1-2 nm.  The
suspension, obtained after the polymerization, functions as the
lubricant in the claimed method.  The solvent for the processes of
miscellae building and the polymerization is the standard lubricant
itself.

      Operation: An automa...