Browse Prior Art Database

Novel Thin Film Disk Lubricant

IP.com Disclosure Number: IPCOM000122760D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 31K

Publishing Venue

IBM

Related People

Kulkarni, R: AUTHOR [+4]

Abstract

When pyrene is chemically attached to ZDOL (from Montedison) by an ester linkage, the resulting compound turns into a solid at room temperature. The solid-liquid transition temperature was found to be at 37~C. One unique property of this new compound is that it does not exhibit any rest stiction at the head-disk interface in a disk drive at room temperature, unlike its parent compound, ZDOL. Durability testing of this new lubricant was found to be satisfactory. We attribute the good lubricity to the fact that this new compound turns into a liquid at the disk file temperature, which is typically at about 50~C.

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Novel Thin Film Disk Lubricant

      When pyrene is chemically attached to ZDOL (from Montedison) by
an ester linkage, the resulting compound turns into a solid at room
temperature.  The solid-liquid transition temperature was found to be
at 37~C.  One unique property of this new compound is that it does
not exhibit any rest stiction at the head-disk interface in a disk
drive at room temperature, unlike its parent compound, ZDOL.
Durability testing of this new lubricant was found to be
satisfactory. We attribute the good lubricity to the fact that this
new compound turns into a liquid at the disk file temperature, which
is typically at about 50~C.

      Thus, this new compound could be used to solve the longstanding
problem of time-dependent rest stiction.

      It was also found that this new compound has improved adhesion
to the carbon overcoat of a hard disk when compared with its parent
compound, ZDOL.

      Disclosed anonymously.