MULTILAYER CERAMIC CAPACITOR
First Claim
1. A multilayer ceramic capacitor comprising:
- a laminate including a plurality of dielectric layers and internal electrodes that are alternately stacked with each other; and
a pair of external electrodes each of which is provided on a surface of the laminate to be electrically connected to the internal electrodes extended to the surface of the laminate;
whereinthe laminate includes;
a first principal surface and a second principal surface, facing each other in a thickness direction being a lamination direction of the dielectric layers and the internal electrodes;
a first end surface and a second end surface, facing each other in a lengthwise direction being a direction in which the pair of external electrodes faces each other, and being provided with the corresponding external electrodes; and
a first side surface and a second side surface, facing each other in a width direction perpendicular or substantially perpendicular to the thickness direction and the lengthwise direction;
whereinthe dielectric layers, a first region positioned between the internal electrode and the first side surface in the width direction, and a second region positioned between the internal electrode and the second side surface in the width direction, in portions of the laminate, include a perovskite compound containing Ba and Ti, and at least one element selected from a group consisting of Ba, Mg, Mn and a rare-earth element; and
relationships S1<
Sa, and S2<
Sa are satisfied where a mole ratio of the at least one element to the Ti in the first region, a mole ratio of the at least one element to the Ti in the second region, and a mole ratio of the at least one element to the Ti in one of the plurality of dielectric layer positioned between the internal electrodes, are S1, S2, and Sa, respectively.
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Accused Products
Abstract
A multilayer ceramic capacitor with improved moisture resistance includes a laminate in which dielectric ceramic layers and internal electrodes are alternately stacked, and a pair of external electrodes provided on corresponding outer portions of the laminate. Each dielectric ceramic layer positioned between the internal electrodes, a first region positioned between the internal electrode and a first side surface in a width direction, and a second region positioned between the internal electrode and a second side surface, contains a perovskite compound containing Ba and Ti, and at least one element selected from a group consisting of Ba, Mg, Mn and a rare-earth element. Relationships S1<Sa and S2<Sa are satisfied, where mole ratios of the at least one element to Ti of the dielectric ceramic layer, the first region, and the second region, are respectively designated as Sa, S1, and S2, respectively.
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Citations
20 Claims
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1. A multilayer ceramic capacitor comprising:
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a laminate including a plurality of dielectric layers and internal electrodes that are alternately stacked with each other; and a pair of external electrodes each of which is provided on a surface of the laminate to be electrically connected to the internal electrodes extended to the surface of the laminate;
whereinthe laminate includes; a first principal surface and a second principal surface, facing each other in a thickness direction being a lamination direction of the dielectric layers and the internal electrodes; a first end surface and a second end surface, facing each other in a lengthwise direction being a direction in which the pair of external electrodes faces each other, and being provided with the corresponding external electrodes; and a first side surface and a second side surface, facing each other in a width direction perpendicular or substantially perpendicular to the thickness direction and the lengthwise direction;
whereinthe dielectric layers, a first region positioned between the internal electrode and the first side surface in the width direction, and a second region positioned between the internal electrode and the second side surface in the width direction, in portions of the laminate, include a perovskite compound containing Ba and Ti, and at least one element selected from a group consisting of Ba, Mg, Mn and a rare-earth element; and relationships S1<
Sa, and S2<
Sa are satisfied where a mole ratio of the at least one element to the Ti in the first region, a mole ratio of the at least one element to the Ti in the second region, and a mole ratio of the at least one element to the Ti in one of the plurality of dielectric layer positioned between the internal electrodes, are S1, S2, and Sa, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification