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Lubrication Process for Magnetic Disks

IP.com Disclosure Number: IPCOM000121185D
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 1 page(s) / 29K

Publishing Venue

IBM

Related People

Ko, M: AUTHOR [+2]

Abstract

In magnetic recording, a lubricant is a necessary component between the head slider and the surface of the magnetic layer. In direct access storage devices which contain rigid disks, the lubricant provides either boundary lubrication or hydrodynamic lubrication. Without a lubricant, head disk interactions result in crashes.

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Lubrication Process for Magnetic Disks

      In magnetic recording, a lubricant is a necessary component
between the head slider and the surface of the magnetic layer.  In
direct access storage devices which contain rigid disks, the
lubricant provides either boundary lubrication or hydrodynamic
lubrication.  Without a lubricant, head disk interactions result in
crashes.

      It is very desirable for file reliability to have the maximum
amount of permissible lubricant on the surface of the disk.  The
permissible amount is that which will not flow in the absence of
centrifugal force.  It has been found that application of
perfluoropolyether type lubricants from Fluorinert(1) solvents
consistently yields higher permissible lube retention on thin film
and particulate disk surfaces than when this type of lubricant is
applied from Freon(2) type solvents.  The fluorinated Fluorinert
solvents are environmentally favored over the chlorofluoro Freon
solvents. (1) Trademark 3M Co. (2) Trademark Dupont Co.

      Disclosed anonymously