Optimization of Printing Properties to Fabricate Devices on Ultra-Thin Flexible Ceramic Substrate

Abstract

In this work, the optimization of the inkjet printing properties on a new flexible ceramic substrate is reported. Printing parameters like drop spacing, number of printed layer, sintering temperature and sintering time were varied to ensure an electrically conductive and repeatable pattern. The test patterns were printed using silver nanoparticle ink and Dimatix 2831 inkjet printer. Then electrical conductivity, bending, and adhesion tests were performed on the printed samples. The three factor factorial design analysis showed that the number of printed layers, sintering temperature, and sintering time were significant factors affecting electrical conductivity. The optimum printing parameters for the E-Strate substrate were found to be 20 μm drop spacing, three layers of printing, and 300°C sintering temperature for 30 minutes. The measured optimum resistivity was found to be 7.88 μΩ-cm. Repetitive bending, adhesion test, and ASTM tape test were pursued to inspect mechanical stability.