Practical Issues Concerning Dispensing End Effectors

Category: Adhesives and Dispensing
Post Date: July 20, 2004
Author(s): Douglass Dixon, Joe Kazalski, Frank Murch, Steve Marongelli, GDM Product Team, Universal Instruments

Description
Chip placement technology and placement speeds drive high speed dispensing. This direct link to the chip shooter determines the required specification for speed in the dispensing process. Over the past 15 years the placement rates have increased from 10,000 chips per hour (cph) to over 40,000 cph. While chip shooter speeds have increased over time the average size of components have been decreasing from 1210 and 1206 (about 40 mils in diameter or more) to 0805 and 0603 (around 20 mils in diameter or less). These changes in speeds and component size reduction have redefined the dispensing requirements. Universal Instruments has had 5 distinct dispensing models introduced to the market to mirror 5 chip placement models sense 1989. This paper explores some of the lesser known aspects of the end effectors or pump technologies.

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