Development of the Low Loss LTCC Material Applied for Millimeter-wave Frequencies

Abstract

New LTCC (Low Temperature Co-fired Ceramics) material that consists of Mg₂SiO₄, SrTiO₃ and highly crystallized Li-Mg-B-Si-O glass was developed. The dielectric constant was 8.8 and Q value was 1620 at 25 GHz (Qf = 40500 GHz). And also, its temperature coefficient of dielectric constant τ_εr was +16 ppm/°C, which was much smaller than that of the existing LTCC material having high Q value. It is a promising LTCC material applying to the high frequency electric component.