Ceramic multilayer substrate

Details Ceramic multilayer substrate Ceramic multilayer substrate

2010-03-01

2011-10-18

Lam, Cathy (Department: 1784)

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

C361S321100, C361S321500, C174S258000, C428S210000

Reexamination Certificate

active

08040657

ABSTRACT:
It is provided a ceramic multilayer substrate obtained by co-sintering a low dielectric constant layer made of an insulating material of a low dielectric constant and a high dielectric constant layer of a dielectric material of a high dielectric constant. The low dielectric constant layer includes a ceramic component of xBaO-yTiO2-zZnO (“x”, “y” and “z” represent molar ratios, respectively, and satisfy the relationship: x+y+z=1; 0.09≦x≦0.20; 0.49≦y≦0.61; 0.19≦z≦0.42) and 1.0 to 5.0 weight parts of a glass component comprising boron oxide with respect to 100 weight parts of the ceramic component. The high dielectric layer is made of a barium titanate based dielectric material with CuO and Bi2O3added thereto.

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Tomoyuki Hasegawa et al, “Dielectric Properties and Microstructures of Low-Temperature-Sintered BaTiO3-Based Ceramics with CuBi2O4 Sintering Aid,” Japanese Journal of Applied Physics, vol. 45, No. 9B, 2006 pp. 7360-7364.

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