US 12,381,037 B2
Multilayer ceramic capacitor
Takashi Degura, Nagaokakyo (JP); and Naobumi Ikegami, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Sep. 19, 2022, as Appl. No. 17/947,218.
Claims priority of application No. 2021-156685 (JP), filed on Sep. 27, 2021.
Prior Publication US 2023/0101380 A1, Mar. 30, 2023
Int. Cl. H01G 4/012 (2006.01); H01G 4/12 (2006.01); H01G 4/232 (2006.01); H01G 4/30 (2006.01)
CPC H01G 4/012 (2013.01) [H01G 4/2325 (2013.01); H01G 4/30 (2013.01); H01G 4/1236 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A multilayer ceramic capacitor comprising:
a multilayer body having a rectangular or substantially rectangular parallelepiped shape, the multilayer body including a plurality of dielectric ceramic layers laminated in a lamination direction T, the multilayer body further including a first main surface and a second main surface defining a pair of main surfaces opposed in the lamination direction T, a first lateral surface and a second lateral surface defining a pair of lateral surfaces opposed in a width direction W orthogonal or substantially orthogonal to the lamination direction T, and a first end surface and a second end surface defining a pair of end surfaces opposed in a length direction L orthogonal or substantially orthogonal to the lamination direction T and the width direction W; and
a pair of external electrodes; wherein
the pair of external electrodes include a first external electrode on the first lateral surface and a second external electrode on the second lateral surface;
the first external electrode extends from the first lateral surface to the first main surface, the second main surface, the first end surface, and the second end surface;
the second external electrode extends from the second lateral surface to the first main surface, the second main surface, the first end surface, and the second end surface;
the first lateral surface is completely covered by the first external electrode, and the second lateral surface is completely covered by the second external electrode;
the length direction L is longer than the lamination direction T or the width direction W;
a dimension of the multilayer body in the length direction L is 610 μm±10%;
a dimension of the multilayer body in the width direction W is 290 μm±10%, the width direction W being a direction in which a portion of the first external electrode covering the first lateral surface is opposed to a portion of the second external electrode covering the second lateral surface;
the multilayer body includes a plurality of internal electrode layers;
the plurality of internal electrode layers include:
a first internal electrode layer extending towards the first lateral surface and connected to the first external electrode; and
a second internal electrode layer extending towards the second lateral surface and connected to the second external electrode;
each of the first internal electrode layer and the second internal electrode layer includes Cu;
each of the dielectric ceramic layers includes a ceramic material including (Ca1-x-y, Srx, Bay)m (Zr1-z-α, Tiz, Hfα) O3, where x is 0 or more and about 1 or less, y is 0 or more and about 0.4 or less, m is about 1.0 or more and about 1.1 or less, z is 0 or more and about 0.2 or less, and a is 0 or more and about 0.3 or less; and
a thickness of each of the dielectric ceramic layers is about 2 μm or more and about 40 μm or less.