Simulation and Experimental Research on the Effect of Scraper Pressure on Pattern Transferring Process of Gravure Printed Electronic Equipment

Abstract

Printed electronics is a new technology for manufacturing electronic products. However, the existing printing technologies could not meet the requirements for high precision of printing as required for producing silicon microelectronic devices. A regulation method is proposed to solve the problem of forming precision control of the pattern in gravure printing electronics. Based on the Navier–Stokes equations and Continuity equation for Newton flow, the relationship between ink flow velocity and scraper pressure change is studied. Thus, the coupling effect of cell ceiling, scraper shape and ink is analyzed by numerical decoupling method. ANSYS CFX is used to simulate the velocity of the ink transferring process. The scraper deformation and ink film thickness uniformity were tested and measured. According to the simulation and test results, the model is modified. Research findings: Under the printing pressure, the deformation in the middle of the doctor blade is slightly lower than that at both ends. When the initial printing pressure is constant, most ink uneven streaks appear at 1/2-1/3 of the doctor blade. It is shown that increasing the initial angle of the scraper can improve the printing precision of the gravure printing electronic equipment via the reasonable matching of the initial angle by the roller scraper pressure.