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Particle Collector for Head/Disk Assembly Contamination Diagnostics

IP.com Disclosure Number: IPCOM000050702D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Hill, CJ: AUTHOR [+2]

Abstract

To collect particulate matter in a head/disk assembly (HDA) in a controlled manner for further analysis, particle collectors in the form of double-coated tape are adhered at selected locations of the HDA enclosure interior surfaces. The collector size and shape are most conveniently selected as the size and shape of the sample holder of the device to be used for subsequent analysis. A typical tape for such use is a neoprene foam tape that withstands temperatures on the order of 250 degrees F for extended periods of time. An alternative material would be a metallic (such as silver) screen base material to which is applied a solvent base adhesive (such as a collodion) that retains adhesive qualities over an extended period.

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Particle Collector for Head/Disk Assembly Contamination Diagnostics

To collect particulate matter in a head/disk assembly (HDA) in a controlled manner for further analysis, particle collectors in the form of double-coated tape are adhered at selected locations of the HDA enclosure interior surfaces. The collector size and shape are most conveniently selected as the size and shape of the sample holder of the device to be used for subsequent analysis. A typical tape for such use is a neoprene foam tape that withstands temperatures on the order of 250 degrees F for extended periods of time. An alternative material would be a metallic (such as silver) screen base material to which is applied a solvent base adhesive (such as a collodion) that retains adhesive qualities over an extended period. For later analysis, the sample can be examined directly or the adhesive can be solvent extracted and filtered for particles.

The figure illustrates a typical head disk assembly with an enclosure 4 including an actuator housing extension 5 and a top cover 6. The collectors may be adhered to the enclosure inner surfaces including those of the actuator housing extension and the interior cover surface. Typical locations are indicated on the housing inner surface at 7, 8 and in phantom view on the opposite surfaces at 9, 10, 11 and 12. Thus, some collectors could be removed simply by removing the cover, others by removing the actuator, and still others by removing the disks. The part...