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Browse Prior Art Database

Disk Burnishing Head Design for High Performance Disk Files

IP.com Disclosure Number: IPCOM000121359D
Original Publication Date: 1991-Aug-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Elser, KH: AUTHOR [+3]

Abstract

A novel self-loading air bearing slider is disclosed with cutting wedges at the trailing ends of the bearing rails. These serve to cut and burnish any asperities present on the media surface. Also, this new design reduces the time required to burnish the disk surfaces.

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Disk Burnishing Head Design for High Performance Disk Files

      A novel self-loading air bearing slider is disclosed with
cutting wedges at the trailing ends of the bearing rails. These serve
to cut and burnish any asperities present on the media surface.
Also, this new design reduces the time required to burnish the disk
surfaces.

      The slider comprises a recessed zone 1 on each side formed by
etching, for example, and a recessed zone 2 in the central area of
the slider to produce two air bearing rails 3 (see the figures).
While the two rails 3 create positive pressure regions, the cavity
area 2 in between the two rails generates a negative pressure region.
The rails and the connecting member at the leading edge of the slider
have a taper 4 and there are four cutting wedges 5 on the trailing
end of the two rails.  As the slider is accessed over the surface of
the media, any asperities protruding from the media, having a height
greater than the flying height of the cutting wedges 5, are burnished
away.
    The self-loading bearing provides high stiffness for
    burnish effectiveness at very low external load.
    Controlled low burnish flying height over a wide range
    of disk velocities (insensitive to disk radius and to
    different disk sizes).
    Trailing edge wedges are most effective in cutting off
    asperities.
    High burnish throughput at high burnish yields
    demonstrated.