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Blade Burnish Slider

IP.com Disclosure Number: IPCOM000109242D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 2 page(s) / 78K

Publishing Venue

IBM

Related People

Hernandez, MA: AUTHOR

Abstract

Disclosed is an improved disk burnishing head design with a cutting "blade" which extends across the entire width of the slider's trailing edge. The design offers several advantages, notably a higher quality asperity-free disk surface.

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This is the abbreviated version, containing approximately 53% of the total text.

Blade Burnish Slider

       Disclosed is an improved disk burnishing head design with
a cutting "blade" which extends across the entire width of the
slider's trailing edge.  The design offers several advantages,
notably a higher quality asperity-free disk surface.

      The design comprises a rectangular burnishing slider with a
fabricated slot just aft of the trailing edge running across its
entire width.  This slot separates the effective air bearing surface
(ABS) from a thin portion of the ABS remaining at the trailing edge,
the "blade."  The inner edge of this blade serves as the cutting edge
during the burnishing process.

      The effective ABS is etched to create a recessed cavity for
negative pressure self-loading characteristics.  At the leading edge,
an ABS base rail provides stability.

      Numerous benefits are offered by this design.  The blade width
optimizes burnish capacity by making the maximum number of contacts
per disk pass.

      The burnish mechanism primarily cuts and scrapes, with
virtually no ponding, ensuring permanent removal of asperities.

      Furthermore, the fabricated slot provides a large reservoir for
debris accumulation and results in less debris on the disk.

      The process of grinding the slot creates a more aggressive
cutting edge which flies perpendicular to the disk's surface.
Previous designs offered an edge on the order of 30 to 45 degrees.

      Currently the slider is cleaned after...