Dielectric properties of new LTCC material applied to high frequencies

Yasutaka SUGIMOTO; Naoya MORI; Yoichi MORIYA; Takahiro TAKADA

doi:10.2109/jcersj2.122.492

Technical reports

Dielectric properties of new LTCC material applied to high frequencies

Yasutaka SUGIMOTO, Naoya MORI, Yoichi MORIYA, Takahiro TAKADA

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Keywords: LTCC, Microwave, High Q value, Low temperature coefficient, Low dielectric constant, BPF

JOURNAL FREE ACCESS

2014 Volume 122 Issue 1426 Pages 492-495

DOI https://doi.org/10.2109/jcersj2.122.492

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Abstract

We have developed an LTCC (Low Temperature Co-fired Ceramics) material, which consists of Mg₂SiO₄, SrTiO₃ and highly crystallized Li–Mg–Zn–B–Si–O glass. The material was able to be co-fired with inner cupper electrodes that have high electric conductivity. The dielectric constant is 8.8 and its Q value is 1620 at 25 GHz. Moreover, its temperature coefficient of dielectric constant τ_ε is +16 ppm/°C, which is much smaller than that of the LTCC material reported previously. Using the new LTCC material, band-pass filter (BPF) was successfully fabricated. The BPF had no defects such as delamination or cracks, and its filter properties were confirmed.

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