Research on the Impact of Gas Flow Rate on Multiphase Flow Micro-jet Conformal Printing

Abstract

This study aims to explore the role of gas flow rate in multiphase flow micro-jet conformal printing and investigate its influence on the characteristic line width and morphology of printed conductive lines. A research methodology combining numerical simulation and experimental validation is employed. By simulating the movement trajectory of atomized droplets inside the micro-jet printhead during the multiphase flow micro-jet conformal printing process, the impact of focus ratio on the printing process and the printed conductive lines is studied using a controlled variable approach. Corresponding experiments are designed to validate the effects. The simulation and experimental results demonstrate that the characteristic line width of printed conductive lines gradually decreases as the focus ratio increases. At a focus ratio of 2.5, the characteristic line width of printed conductive lines can reach 93μm, without noticeable defects such as satellite droplets, deposition voids, or overspray. Gas flow rate significantly influences the characteristic line width and morphology of printed conduct conformal printing process. The consistency between simulation data and experimental results validates the feasibility of multiphase flow micro-jet conformal printing simulation, laying a foundation for further research in this field.