High frequency characterization of MIM capacitors for RFIC applications
Abstract
Three metal-insulator-metal (MIM) capacitors with different capacitance values are fabricated using polyimide dielectric and Ti/Au electrodes. High frequency characterization in the range of 70MHz – 6GHz is performed to evaluate high operating range and frequency-dependent behaviors of the capacitors. Only small variations in capacitances over the scanning frequency range are observed for all the capacitors. Capacitances are calculated to be 0.89pF, 1.70pF, and 2.22pF. Furthermore, high quality (Q) factors and high self-resonance frequencies (SRFs) with maximum values of 12.58 and 12.75 GHz, respectively, are obtained. These results indicate possible applications of the MIM capacitors in radio-frequency integrated circuits (RFICs).