Browse Prior Art Database

Method to Prevent Load/Unload Ramp Lube from Reaching an Air-Bearing Surface

IP.com Disclosure Number: IPCOM000123627D
Original Publication Date: 1999-Feb-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 1 page(s) / 35K

Publishing Venue

IBM

Related People

Frees, GM: AUTHOR

Abstract

Disclosed is a method to prevent lubrication on a load/unload (L/UL) ramp in a disk drive from migrating to the air-bearing surface (ABS) of the head slider by utilizing an anti-wetting agent (AWA) on the head suspension. Lubrication is typically used on a L/UL ramp to minimize wear and debris generation as the head suspension is moved across its surface. This lubrication, which is generally in the form of an oil, can be transferred to the head suspension where it is free to migrate to the ABS. Accumulation of the lubricant in the ABS negatively affects the flyability of the head slider.

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Method to Prevent Load/Unload Ramp Lube from Reaching an Air-Bearing
Surface

   Disclosed is a method to prevent lubrication on a
load/unload (L/UL) ramp in a disk drive from migrating to the
air-bearing surface (ABS) of the head slider by utilizing an
anti-wetting agent (AWA) on the head suspension.  Lubrication is
typically used on a L/UL ramp to minimize wear and debris generation
as the head suspension is moved across its surface.  This
lubrication, which is generally in the form of an oil, can be
transferred to the head suspension where it is free to migrate to the
ABS.  Accumulation of the lubricant in the ABS negatively  affects
the flyability of the head slider.

   Anti-wetting agents (AWA) prevent the migration of oil
by minimizing the surface tension forces that allow the oil to
travel on a surface.  By applying an anti-wetting agent tot he head
suspension at a location between the ABS and the point of contact
between the head suspension and L/UL ramp, the migration of the
lubricant to the ABS can be eliminated.

   For example, for a "mid-lift" ramp that contacts the head
suspension 10 at location 30, the ramp lubricant could be prevented
from reaching the head slider 20 by placing AWA at location 31.
Alternatively for a "tip-lift" ramp that contract the head suspension
10 at location 40, the ramp lubricant could be prevented from
reaching the head slider 20 by placing AWA at location 41.