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AssigneeKorea Institute of Science and Technology
InventorsYoon-Ho Kim, Hyo-Tae Kim
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A low loss high-frequency dielectric ceramic composition for sintering at a low temperature and method of manufacturing the same which is characterized in that excellent dielectric properties such as a much lower sintering temperature and higher quality coefficient and dielectric constant, compared to a conventional high-frequency ceramic composition, a stabilized temperature coefficient, and a temperature compensating property varied according to a composition, are implemented using a low-priced material such as ZnO—Mo (M═Mg, Co, Ni)—TiO2. In addition, Ag, Cu, an alloy thereof, or an Ag/Pd alloy can be used as an internal electrode. Thus, the composition of the present invention can be used as a dielectric material for all sorts of high-frequency devices, such as a multilayer chip capacitor, multilayer chip filter, multilayer chip capacitor/inductor composite device and module, low temperature sintered substrate, resonator or filter and ceramic antenna.
A high frequency dielectric ceramics composition constituted by combining a combination of (Zn1−xMx)TiO3 and yTiO2 as a main component, into which one of 0˜5 wt % B2O3, 0˜5 wt % H3BO3, 0˜5 wt % SiO2—K2O glass, 0˜5 wt % B2O3 and SiO2—K2O glass, or 0˜5 wt % H3BO3 and SiO2—K2O glass is added as an additive, satisfies conditions of M is Mg, Co or Ni, ‘x’ is 0<x≦0.55 in case of Mg and ‘x’ is 0<x≦1.0 in case of Co, and 0<x≦1.0 in case of Ni, and 0<y≦0.6.
A high frequency dielectric ceramics composition preparation method in which material powder of ZnO, MO (in this respect, MO is MgO, CoO or NiO) and TiO2 is weighed according to a composition range of (Zn1−xMx)TiO3 and yTiO2 (M is one of Mg, Co and Ni, x is 0≦x≦0.55 in case of Mg, x is 0≦x≦1 in case of Co, x is 0≦x≦1 in case of Ni, and y is 0≦y≦0.6), mixed and dried,
A high frequency dielectric ceramics composition constituted by combining a combination (Zn1−aMg1−bCo1−cNi1−d)TiO3 and yTiO2 as a main component, into which one of 0˜5 wt % B2O3, 0˜5 wt % H3BO3, 0˜5 wt % SiO2—K2O glass, 0˜5 wt % B2O3 and SiO2—K2O glass, or 0˜5 wt % H3BO3 and SiO2—K2O glass is added as an additive, satisfies conditions of 0<a≦1, 0<b≦1, 0<c≦1, 0<d≦1 and 0<y≦0.6.
Dependencies are inferred from the claim text.