Characterization of epoxy/BaTiO<inf>3</inf> composite embedded capacitors for high frequency behaviors

Enhancement of dielectric constants of epoxy thermosets via a fine dispersion of barium titanate nanoparticles

“…Of the various approaches used for surface modification, organosilane coupling agents bearing the functional groups reactive with epoxy (e.g., epoxide and amino groups) were often used. We found that the formation of the chemical linkages between the epoxy and BT NPs were critical in the suppression of the aggregation of the inorganic components in the organic matrix . For instance, Iijima et al .…”

“…Organic–inorganic epoxy nanocomposites with high dielectric constants have attracted considerable interest in the microelectronics industry because of their easy processing, compatibility with printed wiring boards, and low cost . It has been realized that the dielectric constant of epoxies can be increased through the incorporation of conductive fillers (e.g., carbon nanotubes, metals, conductive polymers or high‐electric‐constant ceramic fillers, such as ZrO 2 , TiO 2 , and BaTiO 3 . Epoxy composites filled with conductive fillers can exhibit high dielectric constants; however, this class of composites can suffer from a very high dielectric loss because of the high electrical conductivity of the fillers.…”

“…This greatly limits applications of the composite materials in the electric industry. In marked contrast to composites containing conductive fillers, composites containing nanosized ceramics with high dielectric constants can display quite high dielectric constants but relatively low dielectric losses . Barium titanate (BT) is a traditional ferroelectric ceramic, and it has excellent dielectric properties: a high dielectric constant and a low dielectric loss.…”

“…For a successful application, measures must be taken to suppress the macroscopic aggregation of the inorganic fillers in organic polymers. In past years, there have been some reports on the preparation of organic–inorganic nanocomposites of epoxy thermosets with BT NPs in epoxy thermosets . Alam et al .…”

“…[10][11][12][13][14][15][16][17][18] It has been realized that the dielectric constant of epoxies can be increased through the incorporation of conductive fillers (e.g., carbon nanotubes, [19][20][21] metals, 22,23 conductive polymers 24,25 or high-electric-constant ceramic fillers, such as ZrO 2 , 26 TiO 2 , [27][28][29] and BaTiO 3 . [30][31][32][33][34][35][36][37][38][39] Epoxy composites filled with conductive fillers can exhibit high dielectric constants; however, this class of composites can suffer from a very high dielectric loss because of the high electrical conductivity of the fillers. This greatly limits applications of the composite materials in the electric industry.…”