Browse Prior Art Database

High Pressure Water Cleaning of Coated/Lubricated Disks

IP.com Disclosure Number: IPCOM000046689D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Hoffman, RJ: AUTHOR

Abstract

The cleaning of disk 10 is accomplished by means of a water stream 12 that is directed from nozzle 14 at an acute angle with respect to the upper surface of disk 10. Disk 10 comprises an aluminum substrate disk 16 having a magnetic coating 18 on its upper surface and a lubricant layer 20 on magnetic coating 18. Disk 10 has a central opening 22 through it for receiving a drive hub of any suitable type, and disk 10 is drivingly rotated by the hub about its center line 24. Current recording component technology for rigid disks, such as disk 10, necessitates that the recording head fly as close to the magnetic media as possible. These distances are exceedingly small in comparison with the size of ambient particulate contamination that can exist on a disk surface.

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High Pressure Water Cleaning of Coated/Lubricated Disks

The cleaning of disk 10 is accomplished by means of a water stream 12 that is directed from nozzle 14 at an acute angle with respect to the upper surface of disk 10. Disk 10 comprises an aluminum substrate disk 16 having a magnetic coating 18 on its upper surface and a lubricant layer 20 on magnetic coating 18. Disk 10 has a central opening 22 through it for receiving a drive hub of any suitable type, and disk 10 is drivingly rotated by the hub about its center line 24. Current recording component technology for rigid disks, such as disk 10, necessitates that the recording head fly as close to the magnetic media as possible. These distances are exceedingly small in comparison with the size of ambient particulate contamination that can exist on a disk surface. Contaminate particles 26 are shown on the top of the lubricant layer 20, and these may be of sub-micron sizes; nevertheless, they are still quite large in comparison to the distances at which the recording heads fly on the surface of disk 10. If the contamination is not removed prior to assembly of a file containing disk 10, a high probability exists that the contamination will cause aerodynamic instability in the recording head that will lead to catastrophic failure. The sources of contamination are many, but one worthy of note is caused by the shipment of disks between locations, particularly locations that are spaced substantial distances. Disks, such as disk 10, manufactured in one location are routinely shipped to other locations for file assembly, and the technology does not currently exist that would allow this transport without some degree of contamination. Prior to the present invention, a contaminated disk, such as disk 10 with contaminate particles 26, was cleaned by simply wiping the upper surface of t...