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Method for Cleaning Disk Surfaces of, and Purging Particulate Contamination From, an Assembled Head-Disk Assembly

IP.com Disclosure Number: IPCOM000047732D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Hachtman, BD: AUTHOR [+2]

Abstract

During the assembly and processing of a head-disk assembly (HDA), particle contaminants fall on and stick to the disk surfaces within that HDA. These particles can produce errors during surface testing of the HDA, causing it to be rejected, or they can become imbedded in the disk surface by contact with the heads, causing future head scratching, head crashes, and associated HDA failures. Cleaning this particulate matter off the disk surfaces, and removing it from the HDA enclosure before heads are flown, can reduce or eliminate particle-caused testing errors and future HDA failures. Particle contamination introduced onto the disk surfaces of an HDA are removed by the present device, which performs two basic functions: 1. Dislodging (cleaning) particle contaminants from the disk surfaces within the HDA. 2.

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Method for Cleaning Disk Surfaces of, and Purging Particulate Contamination From, an Assembled Head-Disk Assembly

During the assembly and processing of a head-disk assembly (HDA), particle contaminants fall on and stick to the disk surfaces within that HDA. These particles can produce errors during surface testing of the HDA, causing it to be rejected, or they can become imbedded in the disk surface by contact with the heads, causing future head scratching, head crashes, and associated HDA failures. Cleaning this particulate matter off the disk surfaces, and removing it from the HDA enclosure before heads are flown, can reduce or eliminate particle-caused testing errors and future HDA failures. Particle contamination introduced onto the disk surfaces of an HDA are removed by the present device, which performs two basic functions: 1. Dislodging (cleaning) particle contaminants from the disk surfaces within the HDA. 2. Removing the contaminants from the HDA enclosure before the contamination reaches the head-disk interface. The basic device consists of a wipe arm with wiping pad, and an air purge vane, all mounted on a linear slide. The arm/vane enters the HDA through an aperture in the side of the HDA and moves between disks, thus cleaning two disk surfaces for each arm/vane. Multiple arm/vanes are used to clean the entire HDA simultaneously, with the disks rotating as shown in the figure, and with the normal HDA air flow established. The arm/vanes are moved from...