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US 11,081,279 B2Granted
Multilayer ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsKazuhisa Uchida, Naoto Muranishi
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Abstract
A multilayer ceramic capacitor that includes outer electrodes and a multilayer body having stacked inner electrode layers and dielectric layers. The dielectric layers in an effective section contain, relative to 100 parts by mole of Ti, 0.7 to 1.2 parts by mole of Si, 0.9 to 1.1 parts by mole of Dy, 0.24 to 0.34 parts by mole of Mg, 0.17 to 0.23 parts by mole of Al, 0.09 to 0.11 parts by mole of Mn, and 0.04 to 0.06 parts by mole of V. The dielectric layers have a Ba/Ti molar ratio of 1.0073 to 1.0083.
Claims12
A multilayer ceramic capacitor comprising:
- a multilayer body having a stacked plurality of inner electrode layers and dielectric layers, the multilayer body having an effective section where the inner electrode layers face each other with the dielectric layers interposed therebetween in a stacking direction thereof;
- a first outer electrode on a surface of the multilayer body and electrically connected to a first set of the inner electrode layers;
- and
- a second outer electrode on the surface of the multilayer body and electrically connected to a second set of the inner electrode layers,
- wherein the dielectric layers in the effective section contain first crystal grains having:
- a first perovskite compound containing Ba and Ti;
- and
- relative to 100 parts by mole of the Ti:
- 0.7 to 1.2 parts by mole of Si;
- 0.9 to 1.1 parts by mole of Dy;
- 0.24 to 0.34 parts by mole of Mg;
- 0.17 to 0.23 parts by mole of Al;
- 0.09 to 0.11 parts by mole of Mn;
- and
- 0.04 to 0.06 parts by mole of V,
- the dielectric layers in the effective section have a Ba/Ti molar ratio of 1.0073 to 1.0083,
- a number of the first crystal grains in the dielectric layers in the effective section is 1.9 or less per dielectric layer as viewed in the stacking direction, and
- the dielectric layers in the effective section have a thickness variation (CV) of 14.0% or less.
15 more elements
Dependencies are inferred from the claim text.