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13-03-2019 | Issue 8/2019

Journal of Materials Science: Materials in Electronics 8/2019

Ultra-low temperature co-fired CaV2O6-glass composite ceramic substrate for microelectronics

Journal:
Journal of Materials Science: Materials in Electronics > Issue 8/2019
Authors:
Arun Sasidharanpillai, Sebastian Mailadil Thomas, Younki Lee, Hyo Tae Kim
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Abstract

Bivalent calcium metavanadate (CaV2O6) ceramic-glass composite substrates were fabricated using non-aqueous environmental friendly tape casting formulation. 3 wt% of commercial glass was added to the calcined powder of CaV2O6 to achieve a sintering temperature of 650 °C which enables ultra-low temperature co-firing with aluminum electrode. An environmentally benign binder/solvent (Polypropylene carbonate/dimethyl carbonate) system was adopted to prepare the well dispersed slurry for tape casting. The crystal structure and co-fireability of the sintered substrate with Al was verified by X-ray diffraction technique. Thermal, dielectric and morphological analysis of the multilayer were analyzed. The room temperature thermal conductivity of CaV2O6-glass composite sintered at 650 °C is about 2.8 W/m K. Sintered ceramics shows a relatively high linear coefficient of thermal expansion (CTE) of 11.46 ppm/°C, which is favorable for co-firing with high CTE metallic materials. Microwave dielectric properties of CaV2O6-glass composite multilayer fired at 650 °C are εr = 10.6 and tanδ = 3.19 × 10−4 at 15 GHz.

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