Multilayer ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsHideaki TANAKA, Daiki FUKUNAGA, Koji MORIYAMA
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Abstract
A multilayer ceramic capacitor includes a laminated body and first and second external electrodes respectively on both end surfaces of the laminated body. When regions where first internal electrodes or second internal electrodes are not present are regarded as side margin portions in a cross section of the laminated body as viewed from the laminating direction, the side margin portions include multiple side margin layers, and the content of Si in the side margin layer closest to the internal electrode is lower than that in the side margin layer other than the side margin layer closest to the internal electrode.
Claims12
A multilayer ceramic capacitor comprising:
- a laminated body including a plurality of dielectric layers and a plurality of internal electrodes;
- and
- a plurality of external electrodes electrically connected to the plurality of internal electrodes;
- wherein
- the laminated body includes a first principal surface and a second principal surface opposed in a laminating direction, a first side surface and a second side surface opposed in a width direction perpendicular or substantially perpendicular to the laminating direction, and a first end surface and a second end surface opposed in a length direction perpendicular or substantially perpendicular to both the laminating direction and the width direction;
- the plurality of internal electrodes includes first internal electrodes exposed at the first end surface, and second internal electrodes exposed at the second end surface and opposed to the first internal electrodes with the dielectric layers interposed therebetween;
- the laminated body includes outer layer portions provided at a top and a bottom of the laminated body in the laminating direction, and an inner layer portion between the outer layer portions;
- the plurality of external electrodes includes a first external electrode covering the first end surface and electrically connected to the first internal electrodes, and a second external electrode covering the second end surface and connected to the second internal electrodes;
- side margin portions that sandwich the inner layer portion and the outer layer portions in the width direction;
- the side margin portions include outer layers and inner layers, the outer layers being located closer to the first and second side surfaces than the inner layers, and the inner layers being located closer to the plurality of internal electrodes than the outer layers;
- and
- dimensions of the outer layers in the width direction are larger than dimensions of the inner layers in the width direction.
Dependencies are inferred from the claim text.