In order to develop a magnetic/dielectric hybrid material for high-frequency transmission-line devices, a ferrite/polyimide composite thick film was fabricated by using a Mn-Zn ferrite particle and poryimide precursor. The microstructure of the composite thick film was characterized by using SEM observation and X-ray micro analyzer. In addition, the magnetic and dielectric properties of the same film were evaluated. The composite thick film exhibited a large effect on the wavelength shortening up to 1/20 and large absorption for high-frequency electromagnetic energy.
