Electrical Properties of BaTiO3-based 0603/0.1 mu F/0.3mm Ceramics Decoupling Capacitor for Embedding in the PCB of 10G RF Transceiver Module

Abstract

Multi-layer ceramic capacitors as decoupling capacitor were fabricated by dielectric composition with a high dielectric constant. The fabricated decoupling capacitors were embedded in the PCB of the 10G RF transceiver module and evaluated for the characteristics of electrical noise by the level of AC input voltage. In order to further improve the electrical properties of the BaTiO3 based composite, glass frit, MgO, Y2O3, Mn3O, V2O5, BaCO3, SiO2, and Al2O3 were used as additives. The electrical properties of the composites were determined by various amounts of additives and optimum sintering temperature. As a result of the optimized composite, it was possible to obtain a density of 5.77g/cm3 , a dielectric constant of 1994, and an insulation resistance of 2.91´ 1012 Ω at an additive content of 5wt% and a sintering temperature of 1250ºC. After forming a 2.5μm green sheet using the doctor blade method, a total of 77 layers were laminated and sintered at 1180 ºC. A decoupling capacitor with a size of 0.6 mm (W) ´ 0.3 mm (L) ´ 0.3 mm (T) (width, length and thickness, respectively) and a capacitance of 100 nF was embedded using a PCB process for the 10G RF Transceiver modules. In the range of AC input voltage 400mmV @ 500kHz to 2200mV @ 900kHz, the embedded 10G RF Transceiver modules evaluated that it has better electrical performance than the non-embedded modules.