Modeling and Experiment on Piezostack-Driven Diamond Amplification Jetting System

In order to dispense liquids precisely in micro-electronic packaging field, a kind of piezostack-driven diamond amplification jetting system was designed, and an analogous electrical model of the system was constructed based on a lumped parameter method. Then, experiments were carried out to verify the model and its simulation result, and to analyze the effects of system parameters on droplet volume and formation. The results show that, the displacement of the needle can reach 0.3 to 0.5 mm, which is in a suitable range for jetting droplets. For 3 Pa·s viscous liquid, when the driven air-pressure ranges from 0.15 to 0.32 MPa, the droplet volume is positively related to the driven air-pressure. With the increase of viscosity, the droplet volume is reduced, but at the same time, larger driving force is required. The volume can be adjusted by controlling frequency when air-pressure is in a suitable range. The research is of great importance to guide the design of jetting valve and control the droplet disengaging and dispensing accuracy.