Electronic component

Patent metadata

Field	Value
Publication number	US-12106903-B2
Application number	US-202117221857-A
Country	US
Kind code	B2
Filing date	Apr 5, 2021
Priority date	Oct 11, 2018
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

An electronic component includes a multilayer body including inner electrodes and dielectric layers alternately stacked, and an outer electrode electrically connected to the inner electrodes. The multilayer body includes first and second main surfaces opposite to each other in a stacking direction, first and second side surfaces opposite to each other in a width direction, and first and second end surfaces opposite to each other in a length direction. The outer electrode includes first outer electrodes disposed on the first and second end surfaces, and at least one second outer electrode disposed on at least one of the first and second side surfaces. The at least one second outer electrode is directly connected to the inner electrodes at positions spaced away from the at least one of the first or second side surface toward the inside of the multilayer body.

First claim

What is claimed is:

1. An electronic component comprising:
a multilayer body including inner electrodes and dielectric layers that are alternately stacked; and
an outer electrode that is electrically connected to the inner electrodes; wherein
the multilayer body includes a first main surface and a second main surface that are opposite to each other in a stacking direction, a first side surface and a second side surface that are opposite to each other in a width direction perpendicular or substantially perpendicular to the stacking direction, and a first end surface and a second end surface that are opposite to each other in a length direction perpendicular or substantially perpendicular to the stacking direction and the width direction;
the outer electrode includes first outer electrodes that are disposed on the first end surface and the second end surface, and at least one second outer electrode that is disposed on at least one of the first side surface or the second side surface;
the at least one second outer electrode includes a second outer electrode that is disposed on one of the first and second side surfaces, and is directly connected to a corresponding one of the inner electrodes at a position spaced away from the one of the first and second side surfaces on which the second outer electrode is disposed toward an inside of the multilayer body;
each of the inner electrodes that is directly connected to the second outer electrode is directly connected to the second outer electrode at a distance from the one of the first and second sides on which the second external electrode is disposed toward the inside of the multilayer body;
the inner electrodes include a first inner electrode that is electrically connected to a corresponding one of the first outer electrodes, and a second inner electrode that is electrically connected to the at least one second outer electrode;
the second inner electrode is not in contact with the first end surface and the second end surface of the multilayer body; and
the first inner electrode includes a notch that overlaps a connection between the second inner electrode and the at least one second outer electrode in the stacking direction.

2. The electronic component according to claim 1 , wherein
the multilayer body includes a margin portion in which the inner electrodes are not provided when a section of the multilayer body having the length direction and the width direction is viewed in the stacking direction; and
the at least one second outer electrode includes a through section that extends through the margin portion and is directly connected to the inner electrodes by using the through section.

3. The electronic component according to claim 2 , wherein a dimension of the margin portion in the width direction is no less than about 5 μm and no more than about 30 μm.

4. The electronic component according to claim 3 , wherein a shortest distance L1 between the first end surface and the second end surface in the length direction and a dimension L2 of the through section in the length direction satisfy a relationship of L2/L1≥0.42.

5. The electronic component according to claim 4 , wherein the shortest distance L1 and the dimension L2 satisfy a relationship of L2/L1≥0.52.

6. The electronic component according to claim 2 , wherein the margin portion includes a plurality of margin layers that are stacked in the width direction.

7. The electronic component according to claim 1 , wherein
the second inner electrode contains Si and Ti; and
a mole ratio of Si to Ti contained in an end portion of the second inner electrode in the width direction is larger than that in a central portion of the second inner electrode in the width direction.

8. The electronic component according to claim 1 , wherein the outer electrode has a structure that is provided by being simultaneously fired together with the inner electrodes.

9. The electronic component according to claim 2 , wherein an average particle diameter of a dielectric particle that is contained in the dielectric layers that are interposed between the inner electrodes is larger than an average particle diameter of a dielectric particle that is contained in the margin portion.

10. The electronic component according to claim 1 , wherein a dimension, in the width direction, of one of the inner electrodes that is located at a central portion in the stacking direction is larger than a dimension, in the width direction, of another inner electrode that is located at an outer portion in the stacking direction.

11. The electronic component according to claim 1 , wherein
the first inner electrode has a size smaller than that of each of the dielectric layers.

12. The electronic component according to claim 1 , wherein
the first inner electrode contains Si and Ti; and
a mole ratio of Si to Ti contained in an end portion of the first inner electrode in the width direction is larger than that in a central portion of the first inner electrode in the width direction.

13. The electronic component according to claim 1 , wherein end portions of the inner electrodes are aligned in the stacking direction when a section of the multilayer body having the width direction and the stacking direction is viewed in the length direction.

14. The electronic component according to claim 1 , wherein
the multilayer body includes an inner layer portion and outer layer portions disposed on both sides of the inner layer portion in the stacking direction; and
none of the inner electrodes are disposed in the outer layer portions.

15. The electronic component according to claim 14 , wherein each of the outer layer portions include a dielectric body made of a same material as that of the dielectric layers.

16. The electronic component according to claim 2 , wherein the margin portion includes a dielectric body made of a dielectric ceramic material that contains BaTiO 3 as a main component and has a perovskite structure.

17. The electronic component according to claim 16 , wherein the main component includes an additive of Si.

18. The electronic component according to claim 7 , wherein
the plurality of margin layers include an inner margin layer and an outer margin layer; and
the outer margin layer contains Si in an amount larger than that in the inner margin layer.

19. The electronic component according to claim 18 , wherein a mole ratio of Si to Ti in the outer margin layer is higher than a mole ratio of Si to Ti in the inner margin layer.

Assignees

• Murata Manufacturing Co

Inventors

• Muramatsu Satoshi
• Yanagihara Masatoshi
• Doi Akitaka

Classifications

• H01G4/232

  electrically connecting two or more layers of a stacked or rolled capacitor · CPC title

• H01G4/30 Primary

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

• H01G5/14

  due to longitudinal movement of electrodes · CPC title

• H01G4/12

  Ceramic dielectrics {(H01G4/085 takes precedence)} · CPC title

• H01G4/005

  Electrodes · CPC title