LOW TEMPERATURE CO-FIRED CERAMICS WITH LOW DIELECTRIC LOSS FOR MILLIMETER-WAVE APPLICATION

摘要

Provided is a dielectric ceramic composition comprising: 40-70 wt % of a borosilicate-based glass frit comprising 50-80 mol % of SiO₂, 15-20 mol % of B₂O₃, 0.1-5 mol % of one or more alkali metal oxide selected from Li₂O and Na₂O, and 0.1-30 mol % of one or more alkaline earth metal oxide selected from MgO, CaO, SrO and ZnO; and 30-60 wt % of a ceramic filler represented by Chemical Formula 1:; (Zn_1-xMg_x)₂SiO₄  (1)wherein 0≦x≦1.;The disclosed low temperature co-fired ceramic (LTCC) composition is sinterable at low temperature, with a relative density of at least 95% in the temperature range of 800-900° C., is capable of minimizing electric loss, with a dielectric constant of 4-7 and a very low dielectric loss, and is applicable from the low-frequency band to the millimeter-wave band of 60 GHz or more.