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US 12,665,130 B2Granted
Multilayer ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorKazuhiro Nishibayashi
Life of this patent
Estimating the term…
Abstract
A multilayer ceramic capacitor includes first and second internal electrode layers extending in a length direction and a width direction. Coverage ratios in regions R11 and R12 are higher than a coverage ratio in a region R15, and/or coverage ratios in regions R13 and R14 are higher than the coverage ratio in the region R15.
Claims20
A multilayer ceramic capacitor comprising:
- a multilayer body including a plurality of dielectric layers made of a ceramic material and a plurality of internal electrode layers laminated therein, the multilayer body including first and second main surfaces opposed to each other in a lamination direction, first and second lateral surfaces opposed to each other in a width direction intersecting the lamination direction, and first and second end surfaces opposed to each other in a length direction intersecting the lamination direction and the width direction;
- first and second external electrodes respectively provided on the first and second end surfaces of the multilayer body;
- and
- third and fourth external electrodes respectively provided on the first and second lateral surfaces of the multilayer body;
- wherein
- the plurality of internal electrode layers include a plurality of first internal electrode layers each including a first counter electrode portion and a plurality of second internal electrode layers each including a second counter electrode portion, the first counter electrode portion and the second counter electrode portion being opposed to each other in the lamination direction, the plurality of first internal electrode layers extending in the length direction and being connected to the first and second external electrodes, the plurality of second internal electrode layers extending in the width direction and being connected to the third and fourth external electrodes;
- the plurality of first internal electrode layers each include, in the width direction, a side portion adjacent to the first lateral surface, a side portion adjacent to the second lateral surface, and a first middle portion located between the side portion adjacent to the first lateral surface and the side portion adjacent to the second lateral surface, and each include:
- a region R11 located in the side portion adjacent to the first lateral surface and extending from the first end surface to a portion of the first counter electrode portion adjacent to the first end surface;
- a region R12 located in the side portion adjacent to the second lateral surface and extending from the first end surface to a portion of the first counter electrode portion adjacent to the first end surface;
- a region R13 located in the side portion adjacent to the first lateral surface and extending from the second end surface to a portion of the first counter electrode portion adjacent to the second end surface;
- a region R14 located in the side portion adjacent to the second lateral surface and extending from the second end surface to a portion of the first counter electrode portion adjacent to the second end surface;
- and
- a region R15 that is a remaining region other than the region R11, the region R12, the region R13, and the region R14, and includes the first middle portion;
- and
- in at least one of the plurality of first internal electrode layers, a coverage ratio in the region R11 and a coverage ratio in the region R12 are higher than a coverage ratio in the region R15, and/or a coverage ratio in the region R13 and a coverage ratio in the region R14 are higher than the coverage ratio in the region R15.
12 more elements
A multilayer ceramic capacitor comprising:
- a multilayer body including a plurality of dielectric layers made of a ceramic material and a plurality of internal electrode layers laminated therein, the multilayer body including first and second main surfaces opposed to each other in a lamination direction, first and second lateral surfaces opposed to each other in a width direction intersecting the lamination direction, and first and second end surfaces opposed to each other in a length direction intersecting the lamination direction and the width direction;
- first and second external electrodes respectively on the first and second end surfaces of the multilayer body;
- and
- third and fourth external electrodes respectively on the first and second lateral surfaces of the multilayer body;
- wherein
- the plurality of internal electrode layers include a plurality of first internal electrode layers each including a first counter electrode portion and a plurality of second internal electrode layers each including a second counter electrode portion, the first counter electrode portion and the second counter electrode portion being opposed to each other in the lamination direction, the plurality of first internal electrode layers extending in the length direction and being connected to the first and second external electrodes, the plurality of second internal electrode layers extending in the width direction and being connected to the third and fourth external electrodes;
- the plurality of second internal electrode layers each include, in the length direction, an end portion adjacent to the first end surface, an end portion adjacent to the second end surface, and a second middle portion located between the end portion adjacent to the first end surface and the end portion adjacent to the second end surface;
- and each include:
- a region R21 located in the end portion adjacent to the first end surface and extending from the first lateral surface to a portion of the second counter electrode portion adjacent to the first lateral surface;
- a region R22 located in the end portion adjacent to the second end surface and extending from the first lateral surface to a portion of the second counter electrode portion adjacent to the first lateral surface;
- a region R23 located in the end portion adjacent to the first end surface and extending from the second lateral surface to a portion of the second counter electrode portion adjacent to the second lateral surface;
- a region R24 located in the end portion adjacent to the second end surface and extending from the second lateral surface to a portion of the second counter electrode portion adjacent to the second lateral surface;
- and
- a region R25 that is a remaining region other than the region R21, the region R22, the region R23, and the region R24, and includes the second middle portion;
- and
- in at least one of the plurality of second internal electrode layers, a coverage ratio in the region R21 and a coverage ratio in the region R22 are higher than a coverage ratio in the region R25, and/or a coverage ratio in the region R23 and a coverage ratio in the region R24 are higher than the coverage ratio in the region R25.
13 more elements
Dependencies are inferred from the claim text.