Browse Prior Art Database

Device to Clean Heads Used in Disk Certification

IP.com Disclosure Number: IPCOM000115749D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Carter, JA: AUTHOR [+2]

Abstract

Heads used in disk certification are typically cleaned manually by a manufacturing operator. The heads are removed from their mount chucks and then cleaned on a bench top. The process is done by hand and involves scrubbing the heads across an abrasive media saturated with a solvent. The process is not very repeatable nor controllable. With disk certification involving burnish, glide, and mag heads, the manual process is very time consuming. Usually, monitors need to be repeated after heads are removed and remounted.

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Device to Clean Heads Used in Disk Certification

      Heads used in disk certification are typically cleaned manually
by a manufacturing operator.  The heads are removed from their mount
chucks and then cleaned on a bench top.  The process is done by hand
and involves scrubbing the heads across an abrasive media saturated
with a solvent.  The process is not very repeatable nor controllable.
With disk certification involving burnish, glide, and mag heads, the
manual process is very time consuming.  Usually, monitors need to be
repeated after heads are removed and remounted.

      The device to clean heads is a single disk with abrasive media
bonded to both sides.  An ID and OD region is left clear of media to
allow normal clamping and automated handling (usually a robot end
effector).  The head cleaning device is stored somewhere within the
disk certifier, usually along with the monitors.  When the device is
required, automation retrieves it and places it on the spindle.  The
disk certifier software automatically moves the heads into position,
spins up the disk and clean the heads.

      A head cleaning device must meet a number of requirements.  The
media must be effective without changing the heads in anyway, e.g.,
fly height.  It must be effective without the use of a solvent.
Also, the media must be bonded using an adhesive that will not
migrate to the surface and then to the heads.