US Patent 7160829 Low-fire high-permittivity dielectric compositions

A dielectric composition that can be fired at a temperature of below 900° C. The dielectric composition has a dielectric constant of 25–35 and a quality factor (Qxf) of 6,000–20,000 GHz. The composition comprises 3–16 wt % of K2O—Na2O—Li2O—B2O3—SiO2 system glass frit and 84–97 wt % of BaO—TiO2 system dielectric ceramics. The composition can be effectively applied to construct a part of a ceramic multi-layer packaging as a resonator form such as a filter or an antenna, etc.