Browse Prior Art Database

Solder Ball Sorter

IP.com Disclosure Number: IPCOM000037980D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Emerick, AJ: AUTHOR [+3]

Abstract

Disclosed is an apparatus to sort solder balls used as preforms for the tinning operations. Typical defects which are sorted out as defective are as follows: 1. Multiple balls (single balls fused together) 2. Out of round balls 3. Debris

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Solder Ball Sorter

Disclosed is an apparatus to sort solder balls used as preforms for the tinning operations. Typical defects which are sorted out as defective are as follows: 1. Multiple balls (single balls fused together)

2. Out of round balls

3. Debris

Referring to the drawing (top and side views), solder balls are fed at (A) in a continuous controlled rate. The balls enter the center of a round plate (B). The plate surface is studded with .02 inch pins on a .1 inch spaced grid as to form a maze that the balls must pass thru. Tilting the plate towards hopper (C) directs the balls toward their final destination. Slow rotation of the plate in the direction shown moves the balls which do not pass thru the maze into a vacuum pickup
(D). Balls reaching the hopper (C) are defined as acceptable and those that reach the vacuum head are defective.

Disclosed anonymously.

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