Multilayer ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsSatoshi YOKOMIZO, Toshihiro HARADA
Life of this patent
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Abstract
A multilayer ceramic capacitor includes a laminate and an external electrode connected to the internal electrode layer. The laminate includes a central layer portion in which an internal electrode layer and a dielectric ceramic layer are alternately laminated, and a covering portion covering an outer surface of the central layer portion in the lamination direction and the width direction. A region where the main surface meets the lateral surface in the laminate is defined as a corner portion that is rounded, and a distance from the corner portion to an internal electrode closest to the corner portion is about 20 μm or less.
Claims10
A multilayer ceramic capacitor comprising:
- a laminate including a dielectric ceramic layer and an internal electrode layer that are laminated in a lamination direction;
- and
- an external electrode connected to the internal electrode layer;
- wherein
- the laminate includes a first main surface and a second main surface that oppose each other in the lamination direction, a first lateral surface and a second lateral surface that oppose each other in a width direction intersecting the lamination direction, and a first end surface and a second end surface that oppose each other in a length direction intersecting the lamination direction and the width direction;
- the external electrode is disposed on the first end surface and the second end surface, respectively;
- when viewing the laminate through a cross-section parallel or substantially parallel to the width direction and the lamination direction at a central or substantially central portion in the length direction of the laminate, the laminate includes a central layer portion which is a region sandwiched by an internal electrode layer closest to the first main surface and an internal electrode layer closest to the second main surface along the lamination direction, a peripheral layer portion sandwiching the central layer portion in the lamination direction, and a side margin sandwiching the central layer portion in the width direction;
- and
- when a region where the first main surface or the second main surface meets the first lateral surface or the second lateral surface in the laminate is defined as a corner portion, a maximum value of a dimension in the width direction of the side margin is represented by W1, a maximum value of a dimension in the lamination direction of the peripheral layer portion is represented by T1, and a distance from an end portion in the width direction of an internal electrode layer closest to the first main surface or the second main surface of the laminate to the corner portion of the laminate is represented by R1, W1>R1 is satisfied and T1>R1 is satisfied.
Dependencies are inferred from the claim text.