Varghese, J. & Vahera, T. & Ohsato, H. & Iwata, M.o & Jantunen, H. (2017). Novel low-temperature sintering ceramic substrate based on indialite/cordierite glass ceramics. In Japanese Journal of Applied Physics
Novel low-temperature sintering ceramic substrate based on indialite/cordierite glass ceramics
|Author:||Varghese, Jobin1; Vahera, Timo1; Ohsato, Hitoshi1,2;|
1Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu 90014, Finland
2Nagoya Industrial Science Research Institute, Nagoya 464-0819, Japan
3Nagoya Institute of Technology, Nagoya 466-8555, Japan
|Online Access:||PDF Full Text (PDF, 1 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe201902225950
|Publish Date:|| 2018-09-20
In this paper, a novel low-temperature sintering substrate for low temperature co-fired ceramic applications based on indialite/cordierite glass ceramics with Bi2O3 as a sintering aid showing low permittivity (εr) and ultralow dielectric loss (tan δ) is described. The fine powder of indialite was prepared by the crystallization of cordierite glass at 1000 °C/1 h. The optimized sintering temperature was 900 °C with 10 wt % Bi2O3 addition. The relative density achieved was 97%, and εr and tan δ were 6.10 and 0.0001 at 1 MHz, respectively. The composition also showed a moderately low temperature coefficient of relative permittivity of 118 ppm/°C at 1 MHz. The obtained linear coefficient of thermal expansion was 3.5 ppm/°C in the measured temperature range of 100 to 600 °C. The decreasing trend in dielectric loss, the low relative permittivity at 1 MHz, and the low thermal expansion of the newly developed composition make it an ideal choice for radio frequency applications.
Japanese journal of applied physics
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
114 Physical sciences
The authors are thankful to Professor Isao Kagomiya of Nagoya Institute of Technology, Professors Hirotaka Ogawa and Akinori Kan of Meijo University, and President Sadahiko Suzuki of Marusu Glaze Co., Ltd. for the preparation of the indialite/cordierite powder. Dr. Hitoshi Ohsato is grateful to JSPS KAKENHI Grant Number JP16K06735 and Nokia Foundation 2016 for supporting this work for Nokia Visiting Professors Project 201700003. Professor Heli Jantunen and Dr. Jobin Varghese are grateful to European Research Council Project No. 24001893 for financial assistance.
© 2017 The Japan Society of Applied Physics. This is an author-created, un-copyedited version of an article accepted for publication/published in Japanese Journal of Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.7567/JJAP.56.10PE01.