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Browse Prior Art Database

Air Bearing Suspension Design for Direct Overwrite Head for Optical Storage

IP.com Disclosure Number: IPCOM000109780D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

McConnell, WH: AUTHOR

Abstract

Disclosed is a suspension design which, when coupled with any one of numerous air-bearing designs, can be used in optical storage devices to eliminate or mitigate contact between the coil and the media. Previously, there were thought to be two methods of maintaining separation between the direct overwrite head and the media: 1) Mounting the coil on a rigid arm and maintaining the tolerances so as to avoid head/media contact, and 2) Use a high flying air bearing mounted on a compliant suspension.

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Air Bearing Suspension Design for Direct Overwrite Head for Optical Storage

       Disclosed is a suspension design which, when coupled with
any one of numerous air-bearing designs, can be used in optical
storage devices to eliminate or mitigate contact between the coil and
the media.  Previously, there were thought to be two methods of
maintaining separation between the direct overwrite head and the
media:
      1)   Mounting the coil on a rigid arm and maintaining the
tolerances so as to avoid head/media contact, and
      2)   Use a high flying air bearing mounted on a compliant
suspension.

      Proposed here is a suspension design shown in the figure which
is somewhat compliant but with a "stop."  The magnetic head has an
air- bearing surface facing the disk.  Under normal operation, the
"stop" provides separation and no significant forces are generated by
the air bearing.  However, if for some reason, the head comes close
to the media, then the close separation of the air-bearing surfaces
and their relative motion induce pressures which tend to repulse the
head from the media.  With this situation, even if contact occurs, it
will be mitigated by the positive pressures generated while the
surfaces are in close proximity.

      This design eliminated problems with each of the two
conventional designs.  For the rigid arm, separation must be
guaranteed over a large range of operating conditions possibly
leading to tight manufacturing tol...