Browse Prior Art Database

Zone Texture Process

IP.com Disclosure Number: IPCOM000112439D
Original Publication Date: 1994-May-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Hagan, JA: AUTHOR [+3]

Abstract

A process for applying a zone texture (higher roughness) to the start stop region of the disks is disclosed. The higher roughness zone is designed for start stop performance and the data zone for magnetic performance.

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Zone Texture Process

      A process for applying a zone texture (higher roughness) to the
start stop region of the disks is disclosed.  The higher roughness
zone is designed for start stop performance and the data zone for
magnetic performance.

      As shown in the Figure, a zone texture process involves
applying a high roughness (~47 A*) in the start stop zone 2 of the
disk 1.  The roughness in the data zone is designed for high density
recording and can be superfinished (<5 A*).  The zone texture process
is accomplished by pressing a recessed roller 3 to the surface of the
disk.  Free abrasive (SiC) is applied to the texture tape 4
(polyester).  With this process the roughness of the zone will be
determined primarily by the particle size, pressure and tape speed.
The roughness design point will need to satisfy only the stop start
stiction, glide and recording head take-off height requirements, but
not the softerror rate and defect requirements as is the case for a
full surface texture design.  The width of the high roughness region
need only be slightly larger than the width of the recording head (4
to 5 mm).

      This zone texture technology will allow the separate
optimization of the stop stop zone for mechanical performance and the
magnetic data zone high density recording.