Browse Prior Art Database

Combination Circumferential and Crosshatched Texture Process

IP.com Disclosure Number: IPCOM000112573D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Hagan, JA: AUTHOR [+4]

Abstract

Described is the preparation of a new combination texture pattern or patterns which optimize both the magnetic and mechanical performance, of thin film magnetic media.

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This is the abbreviated version, containing approximately 55% of the total text.

Combination Circumferential and Crosshatched Texture Process

      Described is the preparation of a new combination texture
pattern or patterns which optimize both the magnetic and mechanical
performance, of thin film magnetic media.

      It has been found that the texture pattern plays a key role in
affecting both magnetic and mechanical performance of thin film
disks.  Conventional thin film disk texture technology is done using
a single texture pattern.  This texture pattern typically has a
crosshatch angle which may range from 10 to 45 degrees.  The
crosshatch angle and the roughness of the texture are designed to
produce a low level of asperities in conjunction with acceptable
start/stop wear and stiction performance.  It has be found, however,
that the soft error rate performance of the disk improves with
decreasing crosshatch angle, whereas the mechanical performance
(take-off height, wear, and stiction) degrades.  When using
conventional technology, trade-offs must be made between the magnetic
and mechanical performance of the design.

      A description of this combination texture process is as
follows.  First, a circumferential texture pattern is applied to the
surface.  This is followed with light crosshatch texture.  By doing
this, the texture design can be more closely optimized for both
magnetic and mechanical performance.  The process requires the
control of the combination of roughness and crosshatch angle to
maximize the performance...