| US 7,592,886 B2 | ||
| Dielectric porcelain composition and high frequency device using the same | ||
| Ryuichi Saito, Osaka (Japan); Hiroshi Kagata, Osaka (Japan); Hidenori Katsumura, Hyogo (Japan); and Muneyuki Sawada, Osaka (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 11/814,946 PCT Filed Mar. 22, 2006, PCT No. PCT/JP2006/305682 § 371(c)(1), (2), (4) Date Jul. 27, 2007, PCT Pub. No. WO2006/109465, PCT Pub. Date Oct. 19, 2006. |
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| Claims priority of application No. 2005-102170 (JP), filed on Mar. 31, 2005; and application No. 2005-316111 (JP), filed on Oct. 31, 2005. | ||
| Prior Publication US 2009/0033441 A1, Feb. 05, 2009 | ||
| Int. Cl. C04B 35/00 (2006.01); H01P 7/00 (2006.01) | ||
| U.S. Cl. 333—219 [501/139] | 11 Claims |
| 4. A high frequency device comprising:
a laminated body including a dielectric porcelain composition; and
an internal electrode forming a predetermined high frequency circuit in an inner layer of the laminated body;
wherein
the dielectric porcelain composition includes a first component, a second component, and a third component,
the first component being represented by a formula of xBaO-yNd2O3-zTiO2-wBi2O3; x, y, z, and w satisfying 12≤x≤16, 12≤y≤16, 65≤z≤69, and 2≤w≤5, provided that x, y, z, and w are molar ratios and x+y+z+w=100;
the second component including, in weight ratio, 30 to 37 wt % of BaO, 33 to 46 Wt % of SiO2, 8 to 12 wt % of La2O3, 3 to 7 wt % of Al2O3, 0 to 1 wt % of SrO, 0 to 10 wt % of Li2O, 0 to 20 wt % of ZnO, and 7 wt % or less of B2O3, a compounding ratio of the second component being 10 wt % to 30 wt % when a sum of the first component and the second component
is 100; and
the third component including 0.1 to 1 parts by weight of Li2O and 3 to 10 parts by weight of ZnO, relative to 100 parts by weight of a sum of the first component and the second component;
wherein
an average particle diameter of a dielectric mixed powder before firing is not greater than 0.9 μm, the dielectric mixed powder
including a first powder component comprising the first component, a second powder component comprising the second component
and a third powder component comprising the third component; and
the dielectric porcelain composition is a sintered body made by firing the dielectric mixed powder.
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