Browse Prior Art Database

Minimum Contamination During Manufacture of Disk Drives

IP.com Disclosure Number: IPCOM000050886D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Bjerke, MH: AUTHOR [+3]

Abstract

Although disk drives are assembled in class 100 environments, particulate contaminants tend to collect on charged surfaces and be "built into" the disk drives and subsequently lead to malfunctions in the disk drives. The accumulation of particles is prevented by blowing clean ionized air across the surfaces of components of the disk drive 10 (Fig. 1), the components including plastic cover 11, disks 12 and base spindle assembly 13.

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Minimum Contamination During Manufacture of Disk Drives

Although disk drives are assembled in class 100 environments, particulate contaminants tend to collect on charged surfaces and be "built into" the disk drives and subsequently lead to malfunctions in the disk drives. The accumulation of particles is prevented by blowing clean ionized air across the surfaces of components of the disk drive 10 (Fig. 1), the components including plastic cover 11, disks 12 and base spindle assembly 13.

The source of the clean ionized air can be from ionizer 20 (Fig. 2) using class 100 air where ionizers 20 are positioned adjacent to conveyor 30 (Fig. 3) to direct the clean ionized air onto surfaces of disks 12 and covers 11 or the ionized air can be introduced into a hand operated air gun 40 (Fig. 4) which has a clean air line 41 and an ionized air line 43. The clean air line 41 is controlled by trigger 45, and the air passes through filter 42 which functions to remove any oil from the air before the clean air discharges from the gun 40. The ionized air joins the filtered clean air stream and discharges along with the filtered clean air to neutralize static charges, as illustrated in Fig. 5. The statically-held contaminant particles are caused to dislodge from the neutralized surfaces and are blown to the floor to enter the air recirculation system of the class 100 environment which includes filters for trapping the contaminant particles.

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