Dielectric ceramic composition and multilayer ceramic capacitor comprising the same

Patent metadata

Field	Value
Publication number	US-12444536-B2
Application number	US-202318216862-A
Country	US
Kind code	B2
Filing date	Jun 30, 2023
Priority date	Aug 20, 2019
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A dielectric ceramic composition and a multilayer ceramic capacitor comprising the same are provided. The dielectric ceramic composition includes a BaTiO 3 -based base material main ingredient and an accessory ingredient, where the accessory ingredient includes dysprosium (Dy) and cerium (Ce) as first accessory ingredients. A total content of Dy and Ce is greater than 0.25 mol % and equal to or less than 1.0 mol % based on 100 mol % of the base material main ingredient.

First claim

What is claimed is:

1. A multilayer ceramic capacitor, comprising:
a ceramic body comprising dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and
a first external electrode and a second external electrode disposed on external surfaces of the ceramic body, the first external electrode being electrically connected to the first internal electrode and the second external electrode being electrically connected to the second internal electrode,
wherein the dielectric layers comprise dielectric grains comprising a dielectric ceramic composition,
the dielectric ceramic composition comprises a barium titanate (BaTiO 3 )-based base material main ingredient and an accessory ingredient,
the accessory ingredient comprises a first accessory ingredient comprising dysprosium (Dy) and cerium (Ce),
a total content of Dy and Ce is greater than 0.24 mol and equal to or less than 1.0 mol based on 100 mol of the base material main ingredient,
the dielectric ceramic composition comprises 0.001 mol to 0.5 mol of a third accessory ingredient based on 100 mol of the base material main ingredient, and
the third accessory ingredient comprises magnesium (Mg).

2. The multilayer ceramic capacitor of claim 1 , wherein the content of Ce satisfies 0.233 mol≤Ce≤0.932 mol based on 100 mol of the base material main ingredient.

3. The multilayer ceramic capacitor of claim 1 , wherein the first accessory ingredient further comprises lanthanum (La),
wherein the La is disposed at a boundary of the dielectric grains.

4. The multilayer ceramic capacitor of claim 1 , wherein the dielectric ceramic composition comprises 0.1 mol to 2.0 mol of a second accessory ingredient based on 100 mol of the base material main ingredient,
wherein the second accessory ingredient comprises at least one element selected from the group consisting of manganese (Mn), vanadium (V), chromium (Cr), iron (Fe), nickel (Ni), cobalt (Co), copper (Cu) and zinc (Zn).

5. The multilayer ceramic capacitor of claim 1 , wherein the dielectric ceramic composition comprises 0.001 mol to 4.0 mol of a fourth accessory ingredient based on 100 mol of the base material main ingredient,
wherein the fourth accessory ingredient comprises at least one element of silicon (Si) or aluminum (Al).

6. The multilayer ceramic capacitor of claim 1 , wherein a thickness of at least one of the dielectric layers is 0.4 μm or less.

7. The multilayer ceramic capacitor of claim 1 , wherein a size of the multilayer ceramic capacitor is 1005 (length×width, 1.0 mm×0.5 mm) or less.

8. The dielectric ceramic composition of claim 1 , wherein the content of Ce satisfies 0.466 mol≤Ce≤0.932 mol based on 100 mol of the base material main ingredient.

9. The dielectric ceramic composition of claim 1 , wherein the dielectric ceramic composition comprises La in an amount of 0.233 mol or more and 0.699 mol or less based on 100 mol of the base material main ingredient.

10. The multilayer ceramic capacitor of claim 1 , wherein a thickness of at least one of the first and second internal electrodes is 0.4 μm or less.

11. The multilayer ceramic capacitor of claim 1 , wherein a thickness of at least one of the dielectric layers is 0.4 μm or less, and a thickness of at least one of the first and second internal electrodes is 0.4 μm or less.

12. A multilayer ceramic capacitor, comprising:
a ceramic body comprising dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and
a first external electrode and a second external electrode disposed on external surfaces of the ceramic body, the first external electrode being electrically connected to the first internal electrode and the second external electrode being electrically connected to the second internal electrode,
wherein the dielectric layers comprise dielectric grains comprising a dielectric ceramic composition,
the dielectric ceramic composition comprises a barium titanate (BaTiO 3 )-based base material main ingredient and an accessory ingredient,
the accessory ingredient comprises a first accessory ingredient comprising dysprosium (Dy) and cerium (Ce),
a total content of Dy and Ce is greater than 0.24 mol and equal to or less than 1.0 mol based on 100 mol of the base material main ingredient,
the first accessory ingredient further comprises lanthanum (La) in an amount of 0.233 mol or more and 0.699 mol or less based on 100 mol of the base material main ingredient,
the accessory ingredient further comprises 0.001 mol to 4.0 mol of a fourth accessory ingredient based on 100 mol of the base material main ingredient, and
the fourth accessory ingredient comprises aluminum (Al).

13. The multilayer ceramic capacitor of claim 12 , wherein the content of Ce satisfies 0.233 mol≤Ce≤0.932 mol based on 100 mol of the base material main ingredient.

14. The multilayer ceramic capacitor of claim 12 , wherein the dielectric ceramic composition comprises 0.1 mol to 2.0 mol of a second accessory ingredient based on 100 mol of the base material main ingredient,
wherein the second accessory ingredient comprises at least one element selected from the group consisting of manganese (Mn), vanadium (V), chromium (Cr), iron (Fe), nickel (Ni), cobalt (Co), copper (Cu) and zinc (Zn).

15. The multilayer ceramic capacitor of claim 12 , wherein the dielectric ceramic composition comprises 0.001 mol to 0.5 mol of a third accessory ingredient based on 100 mol of the base material main ingredient,
wherein the third accessory ingredient comprises magnesium (Mg).

16. The multilayer ceramic capacitor of claim 12 , wherein the fourth accessory ingredient further comprises Si.

17. The multilayer ceramic capacitor of claim 12 , wherein a thickness of at least one of the dielectric layers is 0.4 μm or less.

18. The multilayer ceramic capacitor of claim 12 , wherein a size of the multilayer ceramic capacitor is 1005 (length×width, 1.0 mm×0.5 mm) or less.

19. The multilayer ceramic capacitor of claim 12 , wherein a thickness of at least one of the first and second internal electrodes is 0.4 μm or less.

20. The multilayer ceramic capacitor of claim 12 , wherein a thickness of at least one of the dielectric layers is 0.4 μm or less, and a thickness of at least one of the first and second internal electrodes is 0.4 μm or less.

Assignees

• Samsung Electro Mech

Inventors

• Seo In Tae
• Kim Kyung Sik
• Doo Sea Hanna
• Jo Ji Hong

Classifications

• C04B35/4682 Primary

  based on BaTiO3 perovskite phase · CPC title

• H01G4/30

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

• H01G4/302

  obtained by injection of metal in cavities formed in a ceramic body · CPC title

• H01B3/12

  ceramics · CPC title

• H01G4/1227 Primary

  based on alkaline earth titanates · CPC title