Multi-layered ceramic electronic component having step absorption layer

Patent metadata

Field	Value
Publication number	US-11164702-B2
Application number	US-201916548151-A
Country	US
Kind code	B2
Filing date	Aug 22, 2019
Priority date	Oct 10, 2018
Publication date	Nov 2, 2021
Grant date	Nov 2, 2021

Abstract

A multi-layered ceramic electronic component includes: a ceramic body including a dielectric layer and first and second internal electrodes disposed to oppose each other with the dielectric layer interposed therebetween; and first and second external electrodes disposed outside of the ceramic body and electrically connected to the first and second internal electrodes, respectively. The first internal electrode is exposed from a first surface of the ceramic body and the second internal electrode is exposed from a second surface opposing the first surface. The first internal electrode has a notch portion disposed inwardly of a portion facing the first surface and, and the second internal electrode has a notch portion disposed inwardly of a portion facing the second surface. Each of the notch portions and a margin portion of the ceramic body in a second direction and in a third direction are provided with a step absorption layer, respectively.

First claim

What is claimed is:

1. A multi-layered ceramic electronic component, comprising:
a ceramic body including a dielectric layer and first and second internal electrodes stacked in a first direction with the dielectric layer interposed therebetween, and having first and second surfaces opposing each other in the first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction; and
first and second external electrodes disposed outside of the ceramic body and including first and second electrode layers, respectively, the first and second electrode layers connected to the first and second internal electrodes, respectively,
wherein the first internal electrode is exposed from the third surface of the ceramic body and the second internal electrode is exposed from the fourth surface,
wherein the first internal electrode has a single notch portion disposed inwardly of a portion facing the third surface, and the second internal electrode has a single notch portion disposed inwardly of a portion facing the fourth surface,
wherein each of the notch portions and a margin portion of the ceramic body in the second direction and the third direction are provided with a step absorption layer, respectively,
wherein each of the first and second internal electrodes is completely spaced apart from the fifth and sixth surfaces,
wherein the notch portion of the first internal electrode or the notch portion of the second internal electrode has a width greater than a width of the margin portion, and
wherein the notch portion of the first internal electrode and the notch portion of the second internal electrode have a rounded shape in a second direction-third direction plane.

2. The multi-layered ceramic electronic component of claim 1 , wherein the ceramic body comprises an active portion including the first and second internal electrodes disposed to oppose each other with the dielectric layer interposed therebetween so as to form capacitance and a cover portion formed on an upper portion and a lower portion of the active portion, and
the margin portion of the ceramic body in the second direction and in the third direction is a margin portion of the active portion.

3. The multi-layered ceramic electronic component of claim 2 , wherein the margin portion of the ceramic body in the second direction is a margin portion of the ceramic body in a longitudinal direction, and
the margin portion of the ceramic body in the third direction is a margin portion of the ceramic body in a width direction.

4. The multi-layered ceramic electronic component of claim 1 , wherein a width of the notch portion in the third direction is 20% to 80% compared to a width of each of the first internal electrode and the second internal electrode in the third direction.

5. The multi-layered ceramic electronic component of claim 1 , wherein a thickness (te) of one of the first and second internal electrodes is less than 1 μm.

6. The multi-layered ceramic electronic component of claim 1 , wherein a thickness (td) of the dielectric layer is less than 2.8 μm.

7. The multi-layered ceramic electronic component of claim 1 , wherein a thickness (td) of the dielectric layer and a thickness (te) of one of the first and second internal electrodes satisfy td>2×te.

8. The multi-layered ceramic electronic component of claim 1 , wherein the step absorption layer is made of a ceramic material.

9. The multi-layered ceramic electronic component of claim 1 , wherein one of the first and second electrode layers includes 5% by volume or more of glass compared to a conductive metal contained in the one of the first and second electrode layers.

10. A multi-layered ceramic electronic component, comprising:
a ceramic body including a dielectric layer and first and second internal electrodes stacked in a first direction with the dielectric layer interposed therebetween, and having first and second surfaces opposing each other in the first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction; and
first and second external electrodes disposed outside of the ceramic body and including first and second electrode layers, respectively, the first and second electrode layers connected to the first and second internal electrodes, respectively,
wherein the first internal electrode is exposed from the third surface of the ceramic body and the second internal electrode is exposed from the fourth surface,
wherein the first internal electrode has a single notch portion disposed inwardly of a portion facing the third surface, and the second internal electrode has a single notch portion disposed inwardly of a portion facing the fourth surface,
wherein each of the notch portions and a margin portion of the ceramic body in the second direction and the third direction are provided with a step absorption layer, respectively,
wherein the notch portion of the first internal electrode or the notch portion of the second internal electrode has a width greater than a width of the margin portion, and
wherein the notch portion of the first internal electrode and the notch portion of the second internal electrode have a round shape in a second direction-third direction plane.

11. The multi-layered ceramic electronic component of claim 10 , wherein the ceramic body comprises an active portion including the first and second internal electrodes disposed to oppose each other with the dielectric layer interposed therebetween so as to form capacitance and a cover portion formed on an upper portion and a lower portion of the active portion, and
the margin portion of the ceramic body in the second direction and in the third direction is a margin portion of the active portion.

12. The multi-layered ceramic electronic component of claim 11 , wherein the margin portion of the ceramic body in the second direction is a margin portion of the ceramic body in a longitudinal direction, and
the margin portion of the ceramic body in the third direction is a margin portion of the ceramic body in a width direction.

13. The multi-layered ceramic electronic component of claim 10 , wherein a width of the notch portion in the third direction is 20% to 80% compared to a width of each of the first internal electrode and the second internal electrode in the third direction.

14. The multi-layered ceramic electronic component of claim 10 , wherein a thickness (te) of one of the first and second internal electrodes is less than 1 μm.

15. The multi-layered ceramic electronic component of claim 10 , wherein a thickness (td) of the dielectric layer is less than 2.8 μm.

16. The multi-layered ceramic electronic component of claim 10 , wherein a thickness (td) of the dielectric layer and a thickness (te) of one of the first and second internal electrodes satisfy td>2×te.

17. The multi-layered ceramic electronic component of claim 10 , wherein the step absorption layer is made of a ceramic material.

18. The multi-layered ceramic electronic component of claim 10 , wherein one of the first and second electrode layers includes 5% by volume or more of glass compared to a conductive metal contained in the one of the first and second electrode layers.

Assignees

• Samsung Electro Mech

Inventors

• Jeong Gi Seok
• Jun Ho In
• Lee Sun Cheol

Classifications

• H01G4/1227 Primary

  based on alkaline earth titanates · 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

• H01G4/232

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