Composite dielectric, composite dielectric sheet, composite dielectric paste, metal-layered composite dielectric, wiring board and multilayer wiring board
AssigneeTDK Corporation
InventorsKenichi Kawabata, Takaaki Morita
Life of this patent
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Abstract
The composite dielectric of the present invention contains an aromatic liquid crystal polyester and a dielectric ceramic powder arranged in the aromatic liquid crystal polyester, wherein the dielectric ceramic powder exhibits a Q value greater than 650 at a frequency of 1 GHz by perturbation. A wiring board comprising a composite dielectric sheet made of a composite dielectric having such a characteristic exhibits a high dielectric constant and a low dielectric dissipation factor, thereby yielding less transmission loss, and thus can favorably be used in electronic instruments driven in high-frequency regions.
Claims14
A composite dielectric containing:
- an aromatic liquid crystal polyester;
- and
- a dielectric ceramic powder provided in the aromatic liquid crystal polyester;
- wherein the composite dielectric exhibits a Q value of greater than 650 at a frequency of 1 GHz by perturbation method;
- wherein the dielectric ceramic powder includes at least one kind of metal oxide selected from a group consisting of Mg2SiO4, MgTiO3, ZnTiO3, Zn2TiO4, CaTiO3, SrZrO3, Ba2Ti9O20, Ba2(Ti,Sn)9O20, ZrTiO4, (Zn,Sn)TiO4, BaNd2Ti5O14, BaNd2Ti4O12, BaSm2TiO14, BaO—CaO—Nd2O3—TiO2 system, BaO—SrO—Nd2O3—TiO2 system, Bi2O3—BaO—Nd2O3—TiO2 system, PbO—BaO—Nd2O3—TiO2 system, (Bi2O3, PbO)—BaO—Nd2O3—TiO2 system, La2Ti2O7, Nd2Ti2O7, (Li, Sm)TiO3, Ba(Mg1/3Nd2/3)O3, Ba(Zn1/3Ta2/3)O3, Ba(Zn1/3Nd2/3)O3 and Sr(Zn1/3N2/3)O3.
Dependencies are inferred from the claim text.