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Contactless Scrubber- A Disk Cleaning Device

IP.com Disclosure Number: IPCOM000048239D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Shueh, SB: AUTHOR

Abstract

Cleanliness is vital in magnetic head-disk assemblies (HDAs) because of the low glide height of the heads and the greater storage density requirements on modern direct-access storage devices. Contaminants collected during assembly apparently adhere to disk surfaces. Quick effective cleaning methods are essential to scrub these contaminants, off the disks, whether it is assembly or rework.

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Contactless Scrubber- A Disk Cleaning Device

Cleanliness is vital in magnetic head-disk assemblies (HDAs) because of the low glide height of the heads and the greater storage density requirements on modern direct-access storage devices. Contaminants collected during assembly apparently adhere to disk surfaces. Quick effective cleaning methods are essential to scrub these contaminants, off the disks, whether it is assembly or rework.

Instead of using contact cloth or brushes, the present technique employs a contactless scrubber using a high pressure spray of fluid to scrub contaminants off work surfaces. The fluid can be either gas or liquid, such as de-ionized (DI) water. Because only fresh clean fluid touches the work surface (disks, for example), the contaminants and breakage frequently caused by direct physical wiping are completely eliminated.

The fluid departs from the scrubber slit (nozzle) at high speed. The jet impinging upon the rotating disk creates maximum shear, thus dislodging particles from the disks. The unique nozzle allows the slit incidence angle to be almost parallel to the scrubbed surface, while retaining its wall thickness. The dislodged particles, once departed from the disk surfaces, will be siphoned from the scrubber through a series of vacuumed slots in the downstream direction. The system could use either clean gas (nitrogen) or DI water, followed by a clean gas (nitrogen) purge to speed dryimg. Deionized water ia preferred because of t...