Abstract
We investigated the preparation of NiZn-ferrite films by inkjet printing. In order to realize uniform NiZn-ferrite films, a theoretical model was employed to predict the optimal ink-droplet pitches for the inkjet-printing of uniform lines. The model predicted that uniform NiZn-ferrite lines can be printed with ink-droplet pitches less than 96μm. Based on this theoretical study, we successfully printed NiZn-ferrite films of 5-µm thickness without any cracks by printing once. The inkjet-printed NiZn-ferrite films were annealed at various temperatures to improve their crystallinity and magnetic properties. A saturation magnetization (Ms) of 242emu/cm3 was obtained for an inkjet-printed NiZn-ferrite film annealed at 700°C, and the coercivity (Hc) reached a minimum value of 59.71Oe. Our results contribute to the printing of radio-frequency passive components in integrated electronic systems.
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