Multi-layer ceramic electronic component

Patent metadata

Field	Value
Publication number	US-11145458-B2
Application number	US-201916279581-A
Country	US
Kind code	B2
Filing date	Feb 19, 2019
Priority date	Feb 22, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A multi-layer ceramic electronic component includes a plurality of layered internal electrodes and a first crystal grain. The plurality of layered internal electrodes are disposed at intervals in a first direction and each include a pore. The first crystal grain has a larger diameter in the first direction than the interval and has a part disposed in the pore.

First claim

What is claimed is:

1. A multi-layer ceramic electronic component, comprising:
a plurality of layered internal electrodes that are disposed at intervals in a first direction, each internal electrode of the plurality of layered internal electrodes including a pore penetrating through the respective internal electrode in the first direction;
a side margin that covers the plurality of layered internal electrodes in a second direction orthogonal to the first direction; and
a first crystal grain existing at a boundary portion between the plurality of layered internal electrodes and the side margin, the first crystal grain having a larger diameter in the first direction than the interval and having a part disposed in the pore of a first internal electrode of the plurality of layered internal electrodes,
wherein each layered internal electrode of the plurality of layered internal electrodes comprises an end portion and extends in the second direction to its respective end portion, and
wherein the end portions of the layered internal electrodes are aligned with each other in the first direction.

2. The multi-layer ceramic electronic component according to claim 1 , wherein the plurality of layered internal electrodes comprises:
a second internal electrode adjacent to the first internal electrode in the first direction and disposed above the first internal electrode in the first direction; and
a third internal electrode adjacent to the first internal electrode in the first direction and disposed below the first internal electrode in the first direction,
wherein the first internal electrode is connected to the second internal electrode by the first crystal grain, the first crystal grain being in direct contact with both the first internal electrode and the second internal electrode, and
wherein the first internal electrode is connected to the third internal electrode by a second crystal grain disposed in the pore in the first internal electrode, the second crystal grain being in direct contact with both the first internal electrode and the third internal electrode.

3. The multi-layer ceramic electronic component according to claim 1 , wherein
the pore includes a pore including a void forming a space that is not filled with the crystal grain.

4. The multi-layer ceramic electronic component according to claim 1 , wherein
the first crystal grain has a diameter in the first direction that is smaller than twice the interval.

5. The multi-layer ceramic electronic component according to claim 1 , further comprising
a second crystal grain that directly connects two layers adjacent to each other in the first direction out of the plurality of layered internal electrodes.

6. The multi-layer ceramic electronic component according to claim 1 , wherein
the side margin has a dimension in the second direction that is equal to or smaller than 25 μm.

7. The multi-layer ceramic electronic component according to claim 1 , wherein
the interval is equal to or smaller than 500 nm.

8. The multi-layer ceramic electronic component according to claim 1 , wherein
the plurality of layered internal electrodes each has a dimension in the first direction that is equal to or smaller than 500 nm.

Assignees

• Taiyo Yuden Kk

Inventors

• Kowase Yusuke

Classifications

• H01G4/306

  made by thin film techniques · CPC title

• H01G4/1209

  characterised by the ceramic dielectric material (H01G4/1272, H01G4/1281 take precedence) · CPC title

• H01G4/012 Primary

  Form of non-self-supporting electrodes · CPC title

• H01G4/30 Primary

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

• H01G4/12

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