Electrical and aging characterization of organic capacitive substrate

In this study, the high dielectric constant material of the polymer/ceramic composited material was used to fabricate capacitive substrate. The I-V curve of capacitive substrate has been measured under different temperature. It was found that the leakage current was increased for these samples when temperature and applied voltage were increased. In AC electric field measurement, It was found that dielectric properties almost did not change when AC electric field was less than (threshold field) 2.5V/μm at testing frequency of 1 K, 10 K, 100 K and 1 MHz, respectively. Moreover, aging properties of the capacitive substrate were measured under the testing condition of DC 50V/85°C/85%RH for 500 hrs. It was exhibited that the capacitance, dissipation factor, equivalent series resistance and leakage current of the capacitive substrates were increased, but the impedance and reactance were decreased. Furthermore, the experiment results indicate that the aging in dissipation factor was attributed to an increase in the equivalent series resistance value and a decrease in reactance value of the capacitive substrate.