講演情報
[25p-1BC-10]Correlation between the Dielectric Dispersions and Dipolar & Electronic Polarizations of Various Polyimides in the 25-330 GHz Range
〇Haonan Liu1, Ririka Sawada1, Shana Yanagimoto2, Yoshiyuki Yanagimoto2, Shinji Ando1 (1.Tokyo Tech, 2.EM Labs Inc.)
キーワード：
polyimide、dielectric dispersion、polarization
The frequency dependence of the dielectric dispersions (dielectric constant (Dk) and dissipation factor (Df)) of eleven types of polyimides (PIs) was measured in the range of 25 GHz to 330 GHz by combining three types of Fabry-Perot resonators. As the frequency increased, all PIs showed a gradual decrease in Dk and a linear increase in Df. The decrease in Dk is thought to be due to its approach to the square values of the refractive indices of each PI reflecting the electronic polarization. The increase in Df demonstrated a negative correlation with the proportion of polar groups (dipolar polarization) included in each PI. Notably, PIs containing -CF3 groups exhibited a rapid increase in Df, suggesting the influence of unique absorption peaks in the THz domain.