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US-20260128226-A1 - MULTILAYER CERAMIC CAPACITOR

US20260128226A1US 20260128226 A1US20260128226 A1US 20260128226A1US-20260128226-A1

Abstract

A multilayer ceramic capacitor includes dielectric layers, inner electrode layers, first and second main surfaces facing each other in a lamination direction, first and second side surfaces facing each other in a width direction, and first and second end surfaces facing each other in a length direction, a first outer electrode on the first main surface and the first end surface, and a second outer electrode on the first main surface and the second end surface, the first and second end surfaces include inclined surfaces splayed out from the first main surface toward the second main surface and including a first inclined portion on the first main surface side and a second inclined portion on the second main surface side, and an inclination angle of the first inclined portion to the length direction is different from an inclination angle of the second inclined portion to the length direction.

Inventors

  • Kosuke ONISHI

Assignees

  • MURATA MANUFACTURING CO., LTD.

Dates

Publication Date
20260507
Application Date
20251231
Priority Date
20230721

Claims (19)

  1. 1 . A multilayer ceramic capacitor comprising: a multilayer body including a first main surface and a second main surface facing each other in a lamination direction, a first side surface and a second side surface facing each other in a width direction orthogonal to the lamination direction, and a first end surface and a second end surface facing each other in a length direction orthogonal to the lamination direction and the width direction; a first outer electrode on the multilayer body; and a second outer electrode on the multilayer body; wherein the first end surface includes an inclined surface splayed out from the first main surface toward the second main surface; the inclined surface includes a first inclined portion on the first main surface side and a second inclined portion on the second main surface side; and an inclination angle of the first inclined portion with respect to the length direction is different from an inclination angle of the second inclined portion with respect to the length direction.
  2. 2 . The multilayer ceramic capacitor according to claim 1 , wherein the inclination angle of the first inclined portion is smaller than the inclination angle of the second inclined portion.
  3. 3 . The multilayer ceramic capacitor according to claim 1 , wherein the multilayer body includes: a plurality of inner electrode layers; and at least one of the plurality of inner electrode layers is exposed at the first inclined portion.
  4. 4 . The multilayer ceramic capacitor according to claim 3 , wherein at least one of the plurality of inner electrode layers is exposed at the second inclined portion.
  5. 5 . The multilayer ceramic capacitor according to claim 1 , wherein the first inclined portion and the second inclined portion are continuous.
  6. 6 . The multilayer ceramic capacitor according to claim 1 , wherein the inclination angle of the first inclined portion is about 30° to about 85°, inclusive.
  7. 7 . The multilayer ceramic capacitor according to claim 1 , wherein the inclination angle of the second inclined portion is greater than the inclination angle of the first inclined portion by about 5° or more.
  8. 8 . The multilayer ceramic capacitor according to claim 1 , wherein the first side surface includes third inclined portion on the first main surface side and fourth inclined surface on the second main surface side splayed out from the first main surface toward the second main surface.
  9. 9 . The multilayer ceramic capacitor according to claim 1 , wherein a dimension of the multilayer body in the width direction is greater than a dimension of the multilayer body in the length direction.
  10. 10 . The multilayer ceramic capacitor according to claim 1 , wherein about 7/10≤L/W≤about 10/7 is satisfied, where L denotes a dimension of the multilayer ceramic capacitor in the length direction, and W denotes a dimension of the multilayer ceramic capacitor in width the direction.
  11. 11 . The multilayer ceramic capacitor according to claim 8 , wherein a dimension of the multilayer body in the width direction is greater than a dimension of the multilayer body in the length direction.
  12. 12 . The multilayer ceramic capacitor according to claim 8 , wherein about 7/10≤L/W≤about 10/7 is satisfied, where L denotes a dimension of the multilayer ceramic capacitor in the length direction, and W denotes a dimension of the multilayer ceramic capacitor in width the direction.
  13. 13 . The multilayer ceramic capacitor according to claim 8 , wherein the inclination angle of the first inclined portion is smaller than the inclination angle of the second inclined portion.
  14. 14 . The multilayer ceramic capacitor according to claim 8 , wherein the inclination angle of the third inclined portion is smaller than the inclination angle of the fourth inclined portion.
  15. 15 . The multilayer ceramic capacitor according to claim 8 , wherein the first inclined portion and the second inclined portion are continuous.
  16. 16 . The multilayer ceramic capacitor according to claim 13 , wherein a dimension of the multilayer body in the width direction is greater than a dimension of the multilayer body in the length direction.
  17. 17 . The multilayer ceramic capacitor according to claim 13 , wherein about 7/10≤L/W≤about 10/7 is satisfied, where L denotes a dimension of the multilayer ceramic capacitor in the length direction, and W denotes a dimension of the multilayer ceramic capacitor in width the direction.
  18. 18 . The multilayer ceramic capacitor according to claim 13 , wherein the inclination angle of the third inclined portion is smaller than the inclination angle of the fourth inclined portion.
  19. 19 . The multilayer ceramic capacitor according to claim 13 , wherein the first inclined portion and the second inclined portion are continuous.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims the benefit of priority to Japanese Patent Application No. 2023-205232 filed on Dec. 5, 2023 and Japanese Patent Application No. 2023-119009 filed on Jul. 21, 2023, and is a Continuation Application of PCT Application No. PCT/JP2024/013800 filed on Apr. 3, 2024. The entire contents of each application are hereby incorporated herein by reference. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to multilayer ceramic capacitors. 2. Description of the Related Art Electronic devices such as a mobile phone and a portable music player have recently become increasingly smaller and thinner. Accordingly, multilayer ceramic electronic components such as a multilayer ceramic capacitor installed in such a smaller and thinner electronic device have also become smaller and thinner. Particularly, multilayer ceramic electronic components that are becoming thinner are increasingly being used, for example, embedded in a wiring board, or being mounted in a very narrow space even when mounted on the surface of the wiring board. As such, the thinner the multilayer ceramic electronic components, the lower the mechanical strength thereof, leading to a strong demand for securing the mechanical strength. For example, Japanese Unexamined Patent Application Publication No. 2012-222276 discloses a thin multilayer capacitor. This multilayer capacitor includes a capacitor main body having a substantially rectangular parallelepiped shape, a first outer electrode that continuously covers a front surface and front portions of left and right surfaces and upper and lower surfaces of the capacitor main body, and a second outer electrode that continuously covers a rear surface and rear portions of the left and right surfaces and upper and lower surfaces of the capacitor main body. This multilayer capacitor is a thin multilayer capacitor having a dimension H of 0.15 mm in a height direction. SUMMARY OF THE INVENTION In such a thin multilayer capacitor, the contact area between a multilayer body and the outer electrodes is reduced. Therefore, in a case of mounting using a first main surface of the multilayer capacitor as a mounting surface, solder contraction stress upon mounting acts on the outer electrodes, causing the outer electrodes to easily peel off from the multilayer body. Example embodiments of the present invention provide multilayer ceramic capacitors each capable of improving a fixing strength between a multilayer body and outer electrodes. A multilayer ceramic capacitor according to an example embodiment of the present invention includes a multilayer body including a plurality of laminated dielectric layers, a plurality of inner electrode layers laminated on the dielectric layers, a first main surface and a second main surface facing each other in a lamination direction of the plurality of dielectric layers, a first side surface and a second side surface facing each other in a width direction orthogonal to the lamination direction, and a first end surface and a second end surface facing each other in a length direction orthogonal to the lamination direction and the width direction, a first outer electrode on the first main surface and the first end surface of the multilayer body, and a second outer electrode on the first main surface and the second end surface of the multilayer body, the first end surface and the second end surface include inclined surfaces splayed out from the first main surface toward the second main surface, the inclined surfaces include a first inclined portion on the first main surface side and a second inclined portion on the second main surface side, and an inclination angle of the first inclined portion with respect to the length direction is different from an inclination angle of the second inclined portion with respect to the length direction. In a multilayer ceramic capacitor according to an example embodiment of the present invention, the first end surface and the second end surface include inclined surfaces splayed out from the first main surface toward the second main surface. The inclined surfaces include a first inclined portion on the first main surface side and a second inclined portion on the second main surface side. The inclination angle of the first inclined portion with respect to the length direction is different from the inclination angle of the second inclined portion with respect to the length direction. This allows stress near the intersection of the second main surface and the first end surface and stress near the intersection of the second main surface and the second end surface, where the first outer electrode and the second outer electrode are easily peeled off from the multilayer body upon mounting with the first main surface as the mounting surface, to be dispersed to the vicinity of the second inclined portion. Thus, the effect of reducing or preventing the peeling of the first outer