Browse Prior Art Database

Moving the ABS Leading Edge Away from the Front of the Slider

IP.com Disclosure Number: IPCOM000123970D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 1 page(s) / 42K

Publishing Venue

IBM

Related People

Samuelson, LS: AUTHOR

Abstract

Disclosed is an air bearing design feature where the leading edge of the functional air bearing surface is offset away from the front edge of the slider body. This configuration results in improved reliability and manufacturability.

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Moving the ABS Leading Edge Away from the Front of the Slider

Disclosed is an air bearing design feature where the
leading edge of the functional air bearing surface is offset away
from the front edge of the slider body.  This configuration results
in improved reliability and manufacturability.

   Typically, air bearing surface designs incorporate geometry
features located directly against to the leading edge of the slider
body.  However, machining operations and handling can result in
chipping damage to the slider body edges.  For air bearing designs
with leading edge tapers, these chips are generally ground away, and
do not pose any problems.  But for the more recent air bearing
designs utilizing shallow steps, these leading edge chips are not
removed, and can result in disk damage during loading and unloading,
as well as affect the flying height performance of the slider.
Therefore, for these designs, the leading edge of the air bearing
surface features should be slightly offset from the leading edge of
the slider body.  This can be accomplished by etching or ion-milling
a separate, deep step between the air bearing surface and the leading
edge of the slider.  The depth of this step should be such that it
does not affect the flying characteristics of the slider.

   Offsetting the functional air bearing surface away from
the leading edge of the slider body enables the manufacturer to
permit edge chipping without adversely impacting the file
reliability.  The edg...