Dielectric properties of BaTiO3/epoxy composites by lamination process for embedded capacitor application

Abstract

Because of the fabricability of polymer and excellent dielectric properties of ceramics, ceramic-polymer composites have been investigated widely for embedded capacitors which can improve electric performance greatly. In order to obtain further application of composite, the embedded capacitors with three-layer sandwich structure containing the BaTiO 3 /epoxy composites as dielectric layer and copper foil as electrodes were fabricated. The dielectric properties are improved by preventing the defect in dielectric layer through lamination process. Our results show that the capacitors exhibit high dielectric permittivity (e = 20), low dielectric loss (0.01) at 10 3 Hz from 40 to 100°C and high breakdown strength (24 kV/mm), which indicate that the lamination is a promising process for embedded capacitor fabrication and BaTiO 3 /epoxy composites have potential for high-performance embedded capacitors application in field of microelectronics.

Recent development on modification of synthesized barium titanate (BaTiO3) and polymer/BaTiO3 dielectric composites

“…[4] Thus, it is gradually replaced by lead-free environment-friendly barium titanate (BaTiO3, BT) ceramics. [5] BaTiO3 is a ferroelectric inorganic compound with piezoelectric properties and photorefractive effect. Generally, the appearance of BaTiO3 is white powder.…”

“…In addition, the dielectric constant of BaTiO3 reaches a maximum value when the particle size is between 0.8 and 1 micron, which is very important for fabricating multilayer capacitors. [5] The decrease of grain size reduces the compactness of BaTiO3 particles and lowers their dielectric constant. [68] 3.…”

“…[87] The disadvantages of cured epoxy resin are brittleness, tendency to crack, partial discharge under high voltage electric field and ultimate breakdown damage. [5] In order to overcome these shortcomings, micro and nano materials are added into epoxy to improve its dielectric strength. [88] Unsaturated polyester resin is a linear polymer with ester bonds and unsaturated double bonds, which is usually polycondensated from unsaturated dibasic alcohol or unsaturated dibasic alcohol.…”

Effect of arrangement of nano and micro barium titanate (BaTiO3) particles on the enhanced dielectric constant of high‐density polyethylene (HDPE)/BaTiO3

“…But there are no reports about the dielectric constant and electric conductivity of HDPE with binary BaTiO 3 particle system. In literature, many models were used to predict the dielectric constant of 0–3‐type dielectric composites at different volume fraction of fillers . The prediction accuracy of dielectric constant is influenced by the test frequency .…”

“…In literature, many models were used to predict the dielectric constant of 0-3-type dielectric composites at different volume fraction of fillers. [16][17][18] The prediction accuracy of dielectric constant is influenced by the test frequency. 12 Thereby, in this study, three kinds of binary BaTiO 3 particle system were selected: 1600 nm/200 nm, 1600 nm/400 nm, and 400 nm/200 nm.…”