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US 7,087,545 B2Granted
Low-fire high-permittivity dielecric compositions
AssigneeKorea Institute of Science and Technology
InventorsJae-Hwan Park, Jae-Gwan Park, Dong-Soon Shin, Young-Jin Choi
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Abstract
A dielectric composition that can be fired at a temperature of below 900° C. The dielectric composition has a dielectric constant of 25–35 and a quality factor (Qxf) of 6,000–20,000 GHz. The composition comprises 3–16 wt % of K2O—Na2O—Li2O—B2O3—SiO2 system glass frit and 84–97 wt % of BaO—TiO2 system 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.
Claims3
A dielectric composition comprising:
- 84–97 wt % of BaO-nTiO2;
- and
- 3–16 wt % of glass frit consisting of Li2O, B2O3, SiO2, Na2O and K2O
- wherein said n=4.0–4.5 and said dielectric composition has a firing temperature of 875° C.–950° C. and a quality factor (Q*f) of 6,000–20,000.
1 more element
Dependencies are inferred from the claim text.