Low-temperature sintering, low-dielectric cordierite ceramic tapes for high frequency application

Cordierite is a promising material in the fields of high frequency multilayer ceramic components and ceramic package substrates. In this paper, cordierite green tapes were cast by aqueous tape casting with own formula. The characteristics of cordierite tapes such as phase transformation, sintering properties and dielectric properties were studied. Co-firing behavior of cordierite tape and Ag—Pd conductive metal was investigated tentatively. It was shown that the cordierite tapes can be sintered at 900 °C and the main crystalline phase is α- cordierite. The sintered tapes have good density, low dielectric constant (ε=3.4993; 2 GHz)and low dielectric loss (tg δ=0.0063; 2 GHz). There is good co-firing compatibility between cordierite and Ag—Pd conductive metal in the sintering process. The low temperature sintering, low dielectric cordierite tapes can be used as a potential material for high frequency application.