Browse Prior Art Database

Magnetic Head with Tapered Rail Edges for Sweeping

IP.com Disclosure Number: IPCOM000115591D
Original Publication Date: 1995-May-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Sawatzky, E: AUTHOR

Abstract

Disclosed is a magnetic recording head slider with tapered rail edges to provide particle sweeping action in disk drives. The Outer edges of the air bearing rails are flared outward toward the trailing end of the slider. This results in particle sweeping as the head moves over the disk from ID to OD or from OD to ID.

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Magnetic Head with Tapered Rail Edges for Sweeping

      Disclosed is a magnetic recording head slider with tapered rail
edges to provide particle sweeping action in disk drives.  The Outer
edges of the air bearing rails are flared outward toward the trailing
end of the slider.  This results in particle sweeping as the head
moves over the disk from ID to OD or from OD to ID.

      Sweeping is a feature often used in hard disk drives to "push"
loose debris off the disk surface to minimize head/disk interactions.
Orthogonally mounted straight-rail sliders can naturally sweep from
OD to ID.  To achieve the preferred ID to OD sweeping with straight
rails it is necessary to skew the slider on the suspension.  This
invention overcomes the need for skewing and allows sweeping in
either direction with both linear and rotary actuators.

      The invention is best understood by referring to the Figure
which shows a tapered rail head flying over a disk at an arbitrary
radius R.  A particle P1 on the disk at radius R1 is deflected
towards the OD of the disk by the outer rail, and a particle P2 at
radius R2 is deflected towards the ID by the inner rail.  As the head
is moved from ID to OD all particles are swept towards the OD of the
disk.  Similarly, as the head is moved from OD to ID all particles
are swept towards the ID of the disk.  Tapering of the outside rail
edges therefore achieves sweeping action in either direction of
accessing head motion without the co...