Dielectric ceramic composition and multilayered ceramic substrate
AssigneeMurata Manufacturing Co., Ltd.
InventorsTatsuya Ueda, Kimihide Sugou
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Abstract
A multilayered ceramic substrate is produced by laminating and sintering insulating ceramic layers and one or more dielectric ceramic layers. The insulating ceramic layer is composed of a BaO—Al2O3-SiO2 low temperature sintering ceramic material. The dielectric ceramic layer is composed of a dielectric ceramic material containing a dielectric ceramic component represented by BaO—TiO2-(Nd1—mMem)O{fraction (3/2)} wherein Me is a lanthanoid and 0≦m≦1.0, and a glass component of about 20.0 to 65.0 mole percent of barium oxide, about 5.0 to 50.0 mole percent of silicon oxide and about 10.0 to 50.0 mole percent of boron oxide.
Claims20
A multilayered ceramic substrate comprising an insulating ceramic layer having a low dielectric constant and a dielectric ceramic layer having a high dielectric constant,
- wherein the insulating ceramic layer comprises a low temperature sintering ceramic which comprises barium oxide, aluminum oxide and silicon oxide, and
- wherein the dielectric ceramic layer comprises a sintered mixture of a dielectric ceramic component represented by BaO—TiO2-(Nd1—mMem)O{fraction (3/2)} and a glass component comprising barium oxide, silicon oxide and boron oxide, wherein Me is a lanthanoid and 0≦m≦1.0.
Dependencies are inferred from the claim text.