CN-122025419-A - Multilayer ceramic capacitor

CN122025419ACN 122025419 ACN122025419 ACN 122025419ACN-122025419-A

Abstract

Disclosed is a multilayer ceramic capacitor comprising a body having a first surface and a second surface opposite to each other in a first direction, a third surface and a fourth surface opposite to each other in a second direction intersecting the first direction, and a fifth surface and a sixth surface opposite to each other in a third direction intersecting both the first direction and the second direction. The body includes a plurality of dielectric layers and a plurality of internal electrodes stacked in a first direction. The external electrode is disposed outside the main body, and includes a connection portion connected to the internal electrode, a band portion connected to the connection portion and covering a portion of at least one of the first surface, the second surface, the fifth surface, and the sixth surface, and a protrusion portion separated from the connection portion and disposed on the band portion on a corresponding one of the first surface, the second surface, the fifth surface, and the sixth surface. This configuration reduces coating diffusion and suppresses moon phenomenon.

Inventors

ZHENG ZHIYUAN
JIN HONGXI
JIANG QUANYI
Pu Shengzhen
Pu Zheyou

Assignees

三星电机株式会社

Dates

Publication Date: 20260512
Application Date: 20250630
Priority Date: 20241111

Claims (9)

1. A multilayer ceramic capacitor comprising: A main body including first and second surfaces opposite to each other in a first direction, third and fourth surfaces opposite to each other in a second direction intersecting the first direction, and fifth and sixth surfaces opposite to each other in a third direction intersecting both the first and second directions, and including a plurality of dielectric layers and a plurality of internal electrodes stacked in the first direction, and An external electrode provided outside the main body, Wherein the external electrode comprises: a connection part connected to the plurality of internal electrodes; A band portion connected to the connection portion and covering a portion of at least one of the first surface, the second surface, the fifth surface, and the sixth surface, and A protrusion is provided on the belt portion separate from the connection portion and on a respective one of the first surface, the second surface, the fifth surface, and the sixth surface.
2. The multilayer ceramic capacitor according to claim 1, wherein, The protruding portion is separated from an edge of the band portion closer to a central portion of the main body in the second direction.
3. The multilayer ceramic capacitor according to claim 1, wherein, The protruding portion is provided on an edge of the band portion closer to a central portion of the main body in the second direction.
4. The multilayer ceramic capacitor according to claim 1, wherein, The band portion includes: a first sub-band portion on the first surface; A second sub-band portion on the second surface; a third sub-band portion on the fifth surface, and A fourth sub-band portion on the sixth surface, and The protrusion includes: A first sub-protrusion portion provided on the first sub-band portion; a second sub-protrusion portion provided on the second sub-band portion; A third sub-protrusion provided on the third sub-band portion, and A fourth sub-protrusion disposed on the fourth sub-band portion, and The first sub-protrusion, the second sub-protrusion, the third sub-protrusion, and the fourth sub-protrusion are connected to each other.
5. The multilayer ceramic capacitor according to claim 4, wherein, The first sub-protrusion and the second sub-protrusion protrude in a direction parallel to the first direction.
6. The multilayer ceramic capacitor according to claim 4, wherein, The third sub-protrusion and the fourth sub-protrusion protrude in a direction parallel to the third direction.
7. The multilayer ceramic capacitor according to claim 1, wherein, The external electrode further includes a corner portion connecting the connection portion with the band portion.
8. The multilayer ceramic capacitor according to claim 1, wherein, The plurality of internal electrodes includes a plurality of first internal electrodes and a plurality of second internal electrodes disposed in a staggered manner in the first direction.
9. The multilayer ceramic capacitor according to claim 8, wherein, The external electrode includes: a first external electrode disposed on the third surface and connected to the plurality of first internal electrodes, and And a second external electrode disposed on the fourth surface and connected to the plurality of second internal electrodes.

Description

Multilayer ceramic capacitor Technical Field The present disclosure relates to a multilayer ceramic capacitor. Background Electronic components using ceramic materials include capacitors, inductors, piezoelectric devices, piezoresistors, thermistors, and the like. Among ceramic electronic components, a multilayer ceramic capacitor (MLCC) is used in various electronic devices due to its miniaturization, high capacity, and easy installation. The multilayer ceramic capacitor may include a body including a plurality of dielectric layers and a plurality of inner electrodes, and an external electrode disposed outside the body and connected to the inner electrodes. If it is desired to selectively form a coating layer only on the outer electrode, the coating material may be spread onto the side surfaces of the body. This may cause a so-called moon (mooning phenomenon) phenomenon (the boundary between the external electrode and the main body becomes an arc shape instead of a straight line). Disclosure of Invention The present disclosure provides a multilayer ceramic capacitor capable of preventing a moon phenomenon. The multilayer ceramic capacitor according to an embodiment may include a body including first and second surfaces opposite to each other in a first direction, third and fourth surfaces opposite to each other in a second direction intersecting the first direction, and fifth and sixth surfaces opposite to each other in a third direction intersecting both the first and second directions at the same time, and an external electrode, the external electrode may be disposed outside the body, and the external electrode may include a connection portion connected to the plurality of internal electrodes, a band portion connected to the connection portion and covering a portion of at least one of the first, second, fifth, and sixth surfaces, the protrusion portion being separated from the connection portion and disposed on the band portion on a corresponding one of the first, second, fifth, and sixth surfaces. The protruding portion may be separated from an edge of the band portion closer to a central portion of the main body in the second direction. The protruding portion may be provided on an edge of the band portion closer to a central portion of the main body in the second direction. The band part may include a first sub-band part on the first surface, a second sub-band part on the second surface, a third sub-band part on the fifth surface, and a fourth sub-band part on the sixth surface, and the protrusion part may include a first sub-protrusion part disposed on the first sub-band part, a second sub-protrusion part disposed on the second sub-band part, a third sub-protrusion part disposed on the third sub-band part, and a fourth sub-protrusion part disposed on the fourth sub-band part, and the first sub-protrusion part, the second sub-protrusion part, the third sub-protrusion part, and the fourth sub-protrusion part may be connected to each other. The first and second sub-protrusions may protrude in a direction parallel to the first direction. The third sub-protrusion and the fourth sub-protrusion may protrude in a direction parallel to the third direction. The external electrode may further include a corner portion connecting the connection portion with the band portion. The plurality of internal electrodes may include a plurality of first internal electrodes and a plurality of second internal electrodes disposed in a staggered manner in the first direction. The external electrode may include a first external electrode disposed on the third surface and connected to the plurality of first internal electrodes, and a second external electrode disposed on the fourth surface and connected to the plurality of second internal electrodes. According to the multilayer ceramic capacitor according to the embodiment, the protrusion may be disposed on the tape portion of the external electrode, thereby preventing the moon phenomenon. Drawings Fig. 1 is a perspective view schematically showing a multilayer ceramic capacitor according to an embodiment. Fig. 2 is a plan view of fig. 1. Fig. 3 is a side view of fig. 1. Fig. 4 is another side view of fig. 1. Fig. 5 is an exploded perspective view schematically showing a stacked structure of inner electrodes of the multilayer ceramic capacitor of fig. 1. Fig. 6 is a plan view schematically showing a first inner electrode of the multilayer ceramic capacitor of fig. 1. Fig. 7 is a plan view schematically showing a second internal electrode of the multilayer ceramic capacitor of fig. 1. Fig. 8 is a sectional view taken along line I-I' of fig. 1. Fig. 9 is a sectional view taken along line II-II' of fig. 1. Fig. 10 is a partial enlarged view illustrating a region a of fig. 8. Fig. 11 is a plan view schematically showing a multilayer ceramic capacitor according to another embodiment. Fig. 12 is a schematic cross-sectional view of fig. 11. Fig. 13 is a schematic view showing a process