Abstract: The embedded capacitors in PCB (Printed Circuit Board) were fabricated using commercial epoxy/BaTiO3/PI capacitor CCL in conventional PCB build-up process. Capacitance measuring demonstrated the tolerances of the obtained capacitors ranged from －4.0% to －6.0%, and special design to compensate the capacitor geometry significantly decreased the tolerance to －1.1%. Reflow process at 260℃, high thermal cycling, 85℃/85% RH and high-voltage breakdown tests were performed to evaluate the reliability of embedded capacitors. It is summarized that the fabrication of epoxy/BaTiO3/ PI composite embedded capacitors is successfully demonstrated using conventional PCB build-up processes, and their environmental reliability are evaluated to be excellent.