The EZ-IO from Taconic is a thermally stable composite for the next generation of digital circuitry where digital signal processing chips are at or beyond 25 gbps and cannot tolerate unpredictable dielectric constant variation. It can also be used in microwave applications operating at increasingly higher speeds where there is a need to merge both digital and microwave circuitry onto one PCB. The EZ-IO challenges the best FR4 materials at the fabricator level in the most difficult 30-40 layer multilayer digital applications.