Dielectric ceramic and multilayer ceramic capacitor

Details Dielectric ceramic and multilayer ceramic capacitor Dielectric ceramic and multilayer ceramic capacitor

2007-05-31

2009-12-01

Ha, Nguyen T (Department: 2831)

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

C361S311000, C361S313000, C361S321100, C361S321500, C361S306100

Reexamination Certificate

active

07626803

ABSTRACT:
A dielectric ceramic is provided having a high relative dielectric constant, and in the case in which it is used for a multilayer ceramic capacitor, high insulating properties and superior reliability can be obtained even when the thickness of a dielectric ceramic layer is decreased. The dielectric ceramic used for forming the dielectric ceramic layer of a multilayer ceramic capacitor has a composition represented by 100 (Ba1−w−x−mCawSrxGdm)k(Ti1−y−z−nZryHfzMgn)O3+a+pMnO2+qSiO2+rCuO, in which 0.995≦k≦1.010, 0≦w<0.04, 0≦x≦0.04, 0≦y≦0.10, 0≦z≦0.05, 0.015≦m≦0.035, 0.015≦n≦0.035, 0.01≦p≦1.0, 0.5≦q≦2.5, and 0.01≦r≦5.0. In addition, a is a value selected with respect to the deviation from 3 so that the primary component is electrically neutral.

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Written Opinion of the International Searching Authority dated Feb. 7, 2006.

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