A lumped model is developed to improve the design of a thermally driven monolithic inkjet print head. The model is based on a two-dimensional heat conduction equation, an empirical pressure-temperature relation and a hydraulic flow-pressure equation. It has been simulated through the construction of an equivalent electronic circuit, and subsequently analysed using SIMULINK and a circuit simulation tool, PLECS. Using the model, efficient heater structures for a better heat treatment are proposed and validated with experimental results. Futhermore, the effects of the head geometry on drop ejection and refill of ink are analysed using the one-dimensional hydraulic model including nonlinear flow resistances.
Journal: TechConnect Briefs
Volume: 2, Technical Proceedings of the 2003 Nanotechnology Conference and Trade Show, Volume 2
Published: February 23, 2003
Pages: 488 - 491
Industry sector: Sensors, MEMS, Electronics
Topics: Modeling & Simulation of Microsystems