US 11,114,247 B2Granted

Multilayer ceramic capacitor having a capacitor element body inculding a dielectric layer and an internal electrode layer

AssigneeTDK Corporation

InventorsDan Sakurai, Toshihiko Kaneko, Nobuto Morigasaki, Toshinari Takahashi, Yasuhiro Ito

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Abstract

The object of the present invention is to provide the multilayer ceramic capacitor having no deterioration of dielectric properties even in case an inhibitor of an internal electrode layer is pushed out to a dielectric layer when sintering. The multilayer ceramic capacitor 1 including a capacitor element body 10 comprising a dielectric layer 2 and an internal electrode layer 3 stacked in an alternating manner, wherein when Za represents Zr concentration of an dielectric particle in a center part 6 of the dielectric layer 2 and Zb represents Zr concentration of a dielectric particle near the internal electrode layer, 0<(Za/Zb)<1 is satisfied.

Claims2

Dependent claims

A multilayer ceramic capacitor including a capacitor element body comprising a dielectric layer and an internal electrode layer stacked in an alternating manner,

wherein when Za represents an average Zr concentration of dielectric particles in a center part of the dielectric layer and Zb represents an average Zr concentration of dielectric particles near the internal electrode layer,
0<(Za/Zb)<1 is satisfied, and
a dielectric ceramic composition constituting the dielectric layer includes a main component made of a perovskite type compound expressed by a compositional formula of Ba1-x-ySrxCay)m(Ti1-zZrz)O3,
where m, x, y, and z of the above compositional formula all represent mole ratios, and each satisfies 0.9≤m<1.0.0≤x≤0.1.0≤y≤0.01, 0≤(x+y)≤0.4, and 0.1≤z≤0.18.

1 more element

Dependencies are inferred from the claim text.