Multilayer ceramic capacitor

Patent metadata

Field	Value
Publication number	US-12334261-B2
Application number	US-202318495864-A
Country	US
Kind code	B2
Filing date	Oct 27, 2023
Priority date	Nov 30, 2020
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

The present invention is directed to a multilayer ceramic capacitor. The multilayer ceramic capacitor has a first end and a second end that is spaced apart from the first end in a longitudinal direction that is perpendicular to a lateral direction wherein the lateral direction and longitudinal direction are each perpendicular to a Z-direction. The multilayer ceramic capacitor comprises a monolithic body comprising a plurality of dielectric layers and a plurality of electrode layers parallel with the lateral direction. At least one electrode layer includes a first electrode comprising a connecting portion and a central portion extending from the connecting portion in the longitudinal direction wherein the central portion includes a Z-directional edge and the connecting portion includes an edge extending in both the longitudinal direction and the Z-direction and wherein the Z-directional edge of the central portion forms a first angle of from greater than 90° to less than 180° with the edge of the connecting portion. A first external termination disposed along the first end and a second external termination disposed along the second end.

First claim

What is claimed is:

1. A multilayer ceramic capacitor having a first end and a second end that is spaced apart from the first end in a longitudinal direction that is perpendicular to a lateral direction, the lateral direction and longitudinal direction each being perpendicular to a Z-direction, the multilayer ceramic capacitor comprising:
a stacked body comprising a plurality of dielectric layers and a plurality of electrode layers stacked in the lateral direction;
wherein at least one electrode layer includes a first electrode comprising a connecting portion and a central portion extending from the connecting portion in the longitudinal direction, wherein the central portion includes a Z-directional edge and the connecting portion includes an edge extending in both the longitudinal direction and the Z-direction, wherein the edge of the connecting portion is a linear edge, wherein the Z-directional edge of the central portion forms a first angle of from greater than 90° to less than 180° with the edge of the connecting portion;
a first external termination disposed along the first end and a second external termination disposed along the second end.

2. The multilayer ceramic capacitor of claim 1 , wherein the first angle is from 100° to 160°.

3. The multilayer ceramic capacitor of claim 1 , wherein the first electrode further comprises a base portion electrically connected with the first external termination, wherein the connecting portion extends from the base portion in the longitudinal direction.

4. The multilayer ceramic capacitor of claim 3 , wherein the base portion of the first electrode has a longitudinal edge extending in the Z-direction and a length extending in the longitudinal direction and wherein the first external termination has a first longitudinal edge extending in the lateral direction, wherein the first longitudinal edge of the first external termination is within 5% of the longitudinal edge of the base portion based on the length of the base portion.

5. The multilayer ceramic capacitor of claim 3 , wherein the base portion includes a longitudinal edge, wherein the longitudinal edge of the base portion forms a second angle of from greater than 90° to less than 180° with the edge of the connecting portion.

6. The multilayer ceramic capacitor of claim 5 , wherein the second angle is from 100° to 160°.

7. The multilayer ceramic capacitor of claim 1 , wherein the stacked body has a body length in the longitudinal direction between the first end and the second end of the multilayer ceramic capacitor and wherein the first external termination has a first longitudinal edge and the second external termination has a second longitudinal edge wherein the second longitudinal edge is offset in the longitudinal direction from the first longitudinal edge by an external termination gap distance, wherein a ratio of the body length to the external termination gap distance is from 0.2 to 0.8.

8. The multilayer ceramic capacitor of claim 1 , wherein the multilayer ceramic capacitor is symmetric in the lateral direction about a longitudinal centerline that extends in the longitudinal direction.

9. The multilayer ceramic capacitor of claim 1 , wherein the multilayer ceramic capacitor is symmetric in the Z-direction about a lateral centerline that extends in the lateral direction.

10. The multilayer ceramic capacitor of claim 1 , wherein the multilayer ceramic capacitor is configured for mounting to a mounting surface such that the electrode layers are perpendicular with the mounting surface.

11. The multilayer ceramic capacitor of claim 1 , wherein the at least one of the electrode layers comprises a second electrode comprising a base portion electrically connected with the second external termination and wherein a central end gap distance is formed in the longitudinal direction between the central portion of the first electrode and the base portion of the second electrode.

12. The multilayer ceramic capacitor of claim 1 , wherein the first electrode comprises copper.

13. The multilayer ceramic capacitor of claim 1 , wherein the at least one electrode layer further comprises a second electrode, wherein the first electrode and the second electrode comprise copper.

14. The multilayer ceramic capacitor of claim 1 , wherein the dielectric layers comprise an NPO material.

15. The multilayer ceramic capacitor of claim 1 , wherein the dielectric layers comprise a titanate.

16. The multilayer ceramic capacitor of claim 15 , wherein the dielectric layers further comprise an oxide.

17. The multilayer ceramic capacitor of claim 1 , wherein the multilayer ceramic capacitor exhibits an equivalent series resistance that is less than about 30 Ohms at 10 GHz.

18. The multilayer ceramic capacitor of claim 1 , wherein the multilayer ceramic capacitor exhibits an equivalent series resistance that is less than about 20 Ohms at 5 GHz.

19. The multilayer ceramic capacitor of claim 1 , wherein the multilayer ceramic capacitor exhibits an equivalent series resistance that is less than about 10 Ohms at 3 GHz.

20. The multilayer ceramic capacitor of claim 1 , wherein the multilayer ceramic capacitor exhibits an equivalent series resistance of from about 0.1 Ohms to about 30 Ohms from about 2 GHz to about 10 GHz.

21. The multilayer ceramic capacitor of claim 1 , wherein the multilayer ceramic capacitor exhibits an equivalent series resistance of from about 2 Ohms to about 20 Ohms from about 4 GHz to about 10 GHz.

Assignees

• Kyocera Avx Components Corp

Inventors

• Berolini Marianne
• Nelson Cory
• Fuller Seth
• Cordova Alma Iris

Classifications

• H01G4/30 Primary

  Stacked capacitors (H01G4/33 takes precedence) · CPC title

• H01G4/248

  the terminals embracing or surrounding the capacitive element, e.g. caps (H01G4/252 takes precedence) · CPC title

• H01G4/1227

  based on alkaline earth titanates · CPC title

• H01G4/1218

  based on titanium oxides or titanates (H01G4/1245 takes precedence) · CPC title

• H01G4/012

  Form of non-self-supporting electrodes · CPC title