Preparation and evaluation of embedded capacitors with high permittivity BT/ER composites by graft modified method

Dielectric materials with high-K, low loss and high breakdown voltage are of great importance for a broad range of applications in modern electronics and electrical power systems. In this work, embedded capacitors were fabricated with BT/ER composites as the dielectric layer. The composites were modified with Cr Acac which reacted with epoxy matrix. The addition of PEG and Cr Acac enhanced the permittivity. The embedded capacitor samples showed higher capacitance density. The breakdown voltages, thermal stability, and moisture absorption of the samples were also measured and evaluated. The results indicated that these properties reached the industry requirement and the composites were suitable for the industrial application.