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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.122  No.1426 (June) (2014)  >  pp.492-495

Journal of the Ceramic Society of Japan
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Dielectric properties of new LTCC material applied to high frequencies

Yasutaka SUGIMOTO1), Naoya MORI1), Yoichi MORIYA1), Takahiro TAKADA1)
1) Applied Materials Development Department, Materials Technology Center, Technology & Business Development Unit, Murata Manufacturing Co., Ltd.

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 τε 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.

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

Received: November 27, 2013
Accepted: March 10, 2014 , Published online: June 01, 2014
Copyright © 2014 The Ceramic Society of Japan



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