Korea Institute of Science and Technology

Dong-Soon Shin

Jae-hwan Park

Young-Jin Choi

Jae-Gwan Park

Low dielectric constant dielectric ceramics for a borosilicate-based low temperature fired multi-layer substrate is disclosed which can be fired at a wide temperature range of above and below 900&#xb0; C. and exhibits a low loss electrical property. By controlling the types and addition amount of the alkaline earth metal oxide, the linear shrinkage behavior can be considerably controlled while maintaining the electrical property unchanged. The composition facilitates matching a linear shrinkage with a heterogeneous material having certain shrinkage characteristics.

Low dielectric constant low temperature fired ceramics

A dielectric composition that can be fired at a temperature of below 900&#xb0; C. The dielectric composition has a dielectric constant of 25&#x2013;35 and a quality factor (Qxf) of 6,000&#x2013;20,000 GHz. The composition comprises 3&#x2013;16 wt % of KO&#x2014;NaO&#x2014;LiO&#x2014;BO&#x2014;SiOsystem glass frit and 84&#x2013;97 wt % of BaO&#x2014;TiOsystem dielectric ceramics. The composition can be effectively applied to construct a part of a ceramic multi-layer packaging as a resonator form such as a filter or an antenna, etc.

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Seoul, South Korea

Dong-Soon Shin