Performance of polymeric ultra-thin substrates for use as embedded capacitors: comparison of unfilled and filled systems with ferroelectric particles

We have previously published our work on developing thin substrates for use as embedded capacitor layers. Based on this work, we have continued to characterize the performance and reliability of these materials. Additionally, customers have requested even higher capacitance values. We continue to work on making thinner dielectrics, and thus raise capacitance, but it is believed that loading the polymer with high dielectric (ferroelectric) particles can provide the best values for this type of capacitor. We examine the effect of loading the polymer with high Dk particles and compare the positive and negative aspects of using this filler. The results of our internal and external testing (and a comparison to existing and developing capacitor materials) helps determine what benefit(s), if any, a high speed system would get by using a high Dk filler polymer substrate.