Browse Prior Art Database

Automatic Ball Loader for Semiconductor Device Applications

IP.com Disclosure Number: IPCOM000094110D
Original Publication Date: 1966-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Pittler, MS: AUTHOR

Abstract

This machine automatically loads metal balls onto a semiconductor wafer to serve as external contacts for the semiconductor devices incorporated in the wafer. Balls are loaded onto vibratory feeder 1. The latter feeds the balls by feed chute 2 at a controlled rate to rotating mask and wafer holder 3. This is caused to rotate by a supporting rotating pedestal. The wafer is located beneath the mask. After a Preselected period of time, feeder 1 is stopped. Mask 3 is vibrated until the excess balls, which are not in the holes of the mask, are returned by return chute 4 to the feeder bowl of feeder 1. The balls located on the wafer are joined to it to serve as external contacts to the various semiconductor regions.

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Automatic Ball Loader for Semiconductor Device Applications

This machine automatically loads metal balls onto a semiconductor wafer to serve as external contacts for the semiconductor devices incorporated in the wafer. Balls are loaded onto vibratory feeder 1. The latter feeds the balls by feed chute 2 at a controlled rate to rotating mask and wafer holder 3. This is caused to rotate by a supporting rotating pedestal. The wafer is located beneath the mask. After a Preselected period of time, feeder 1 is stopped. Mask 3 is vibrated until the excess balls, which are not in the holes of the mask, are returned by return chute 4 to the feeder bowl of feeder 1. The balls located on the wafer are joined to it to serve as external contacts to the various semiconductor regions.

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