Share Email Print
cover

Proceedings Paper

Performance characteristics of a high frequency jetting dispenser featuring piezoelectric actuator
Author(s): Quoc-Hung Nguyen; Bo-Young Yun; Seung-Bok Choi
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

This paper presents a new type of jetting dispenser driven by a ring type piezoelectric actuator. By operating at very high frequencies, the dispenser is expected to provide very small dispensing dot size of low viscous adhesives (viscosity of 50cp to 500cp) at high dispensing flow rate in semiconductor packaging processes. After describing the mechanism and operational principle of the dispenser, a mathematical model of the system is derived by considering behaviors of the piezostack, the actuating spring, the dispensing needle and the adhesive fluid dynamics. In the modeling, a lumped parameter method is applied to model the adhesive whose rheological property is approximately expressed by Bingham model. The governing equation of the whole dispenser is then derived by integrating the structural model with the fluid model. Based on the proposed model, the dispenser is designed and manufactured. Subsequently, the dispensing performances such as dot size and dispensing flow rate are investigated using the proposed model and then validated by experiment.

Paper Details

Date Published: 18 April 2008
PDF: 11 pages
Proc. SPIE 6928, Active and Passive Smart Structures and Integrated Systems 2008, 69281U (18 April 2008); doi: 10.1117/12.775688
Show Author Affiliations
Quoc-Hung Nguyen, Inha Univ. (South Korea)
Bo-Young Yun, Inha Univ. (South Korea)
Seung-Bok Choi, Inha Univ. (South Korea)


Published in SPIE Proceedings Vol. 6928:
Active and Passive Smart Structures and Integrated Systems 2008
Mehdi Ahmadian, Editor(s)

© SPIE. Terms of Use
Back to Top