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Browse Prior Art Database

Making Miniature Spheres

IP.com Disclosure Number: IPCOM000096716D
Original Publication Date: 1963-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Bolda, FJ: AUTHOR [+3]

Abstract

Small spheres for application in miniature electronic devices as terminals are formed by a continuous process. Metal stock 2 is fed through rollers 4 to cutting tool 6 to form metal particles 8. Particles 8 are then directed toward screen 9. This is placed so that the particles passing through fall onto an alumina slab 10 positioned on conveyor belt 12.

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Making Miniature Spheres

Small spheres for application in miniature electronic devices as terminals are formed by a continuous process. Metal stock 2 is fed through rollers 4 to cutting tool 6 to form metal particles 8. Particles 8 are then directed toward screen 9. This is placed so that the particles passing through fall onto an alumina slab 10 positioned on conveyor belt 12.

The particles on slab 10 are carried into furnace 14 having zones 16 and 18. In zone 16, the particles are heated to a temperature slightly above the melting point of the metal to form the spherical configuration. In zone 18, the particles are cooled under a protective atmosphere to a temperature below that of the heating temperature but above that of room temperature. From cooling zone 18 the particles are carried from the furnace and dropped into a screen 19 and again screened for size.

With this technique high yields and close tolerances are realized for spherical metal terminals.

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