Influence of filler concentration on frequency dependence of electrically conductive adhesive joints impedance

Impedance of adhesive joints formed of eight types of electrically conductive adhesives of epoxy type with silver filler was examined in the frequency range of 20 Hz-1 MHz. Adhesives with isotropic electrical conductivity and filler concentration in the range of 60-75 % (b.w.) were used for experiments. Relationship between the dependence of the joints impedance on the frequency and the filler concentration in adhesive was examined. It was found that the influence of the filler concentration on the frequency dependence of the joint impedance is very low.