Browse Prior Art Database

Head Debris Pickup Control in Disk Drive Mechanisms

IP.com Disclosure Number: IPCOM000118875D
Original Publication Date: 1997-Aug-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 1 page(s) / 39K

Publishing Venue

IBM

Related People

Haswell, JM: AUTHOR [+3]

Abstract

Disclosed is a disk drive design method which provides a mechanism to remove debris from the head of a disk drive. This technique can be applied in a conventional contact start/stop drive without the usual time penalty involved and additionally can be employed in a drive using head load/unload where there is usually no method to mechanically remove debris from the head.

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This is the abbreviated version, containing approximately 70% of the total text.

Head Debris Pickup Control in Disk Drive Mechanisms

      Disclosed is a disk drive design method which provides a
mechanism to remove debris from the head of a disk drive.  This
technique can be applied in a conventional contact start/stop drive
without the usual time penalty involved and additionally can be
employed in a drive using head load/unload where there is usually no
method to mechanically remove debris from the head.

      In a drive using the proposed method and apparatus, a zone of
the disk, normally at the Inner Diameter (ID) but not limited to this
area, is set aside as the cleaning zone.  Normally the ID is chosen,
since at this radius the head is travelling at the lowest linear
velocity of any point in the stroke.  The cleaning zone is provided
with a special texture which is significantly rougher than the normal
data area, which may have no texture, and the landing zone, if one
exists.  The special textured area is preferably created using a
laser bump process but is not limited to this technique.

      The texture in the cleaning zone is formed in such a manner as
to deliberately cause contact with the head even at normal operating
disk speeds.  To clean the head during drive operations the actuator
seeks to the cleaning zone and maintains the head in the zone for a
short period.  After this, the actuator returns to the normal data
zone and ordinary operations continue.

Two further enhancements are possible to the disclosed invention:
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