To satisfy the increasing demand for multimaterial
dispensing in microelectronics industry, this paper
presents a multi-dispensing-module droplet-on-demand printing
machine. The dispensing- module consist a pneumatic diaphragm
droplet generator for molten metal, a piezoelectric piston droplet
generator for low viscosity fluid and a mechanical valve droplet
generator for high viscosity fluid. Image acquisition system with
digital and analog camera for the visual guiding and droplet
producing process image collection are established. A three
dimensional stage and a rotary stage with motion card and PC
(personal computer) forms the positioning system to realize the
accurate position of droplet jetting. This data-driven nature of
proposed structure greatly improves the system flexibility with
which the user can dynamically configure the desired materials
for microelectronics manufacturing and assembling.
Experimental study on the printing machine for molten metal,
mixture of DI water and glycerin solution, and epoxy resin was
carried out. The result of the present work implied that the
developed multi-dispensing-module droplet-on-demand system
can achieve a flexible and friendly user interface, while
dispensing a wide range of functional materials using various
types of droplet generators.