Multilayered capacitor

Patent metadata

Field	Value
Publication number	US-2025232914-A1
Application number	US-202418743377-A
Country	US
Kind code	A1
Filing date	Jun 14, 2024
Priority date	Jan 16, 2024
Publication date	Jul 17, 2025
Grant date	—

Abstract

A multilayered capacitor may include a capacitor body including a dielectric layer and an internal electrode, and an external electrode outside the capacitor body, wherein the internal electrode includes zirconium (Zr), an average content of zirconium (Zr) for the internal electrode is greater than or equal to about 0.0005 mol % and less than about 5.0 mol %, the dielectric layer includes a plurality of dielectric grains, at least one of the plurality of dielectric grains has a core-shell structure, and the core, the shell, or both include zirconium (Zr).

First claim

What is claimed is:

1 . A multilayered capacitor, comprising
a capacitor body including a dielectric layer and an internal electrode; and an external electrode outside the capacitor body, wherein the internal electrode includes zirconium (Zr), an average content of zirconium (Zr) for the internal electrode is greater than or equal to about 0.0005 mol % and less than about 5.0 mol %, the dielectric layer includes a plurality of dielectric grains, at least one of the plurality of dielectric grains has a core-shell structure, and the core, the shell, or both include zirconium (Zr).

2 . The multilayered capacitor of claim 1 , wherein
the internal electrode further includes a conductive metal.

3 . The multilayered capacitor of claim 1 , wherein
the dielectric grain includes a main component and a subcomponent, and the main component includes Ba m TiO 3 (0.995≤m≤1.010), (Ba 1-x Ca x ) m (Ti 1-y Zr y )O 3 (0.995≤m≤1.010, 0≤x≤0.10, 0<y≤0.20), Ba m (Ti 1-x Zr x )O 3 (0.995≤m≤1.010, x≤0.10), (Ba 1-x Ca x ) m (Ti 1-y Sn y )O 3 (0.995≤m≤1.010, 0≤x≤0.10, 0<y≤0.20), or a combination thereof.

4 . The multilayered capacitor of claim 3 , wherein
the subcomponent includes zirconium (Zr), manganese (Mn), chromium (Cr), silicon (Si), aluminum (Al), magnesium (Mg), tin (Sn), antimony (Sb), hafnium (Hf), and germanium (Ge), gallium (Ga), indium (In), lanthanum (La), yttrium (Y), actinium (Ac), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), Terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), or a combination thereof.

5 . The multilayered capacitor of claim 1 , wherein
an average content of zirconium (Zr) for the internal electrode is in a range from about 0.001 mol % to about 1.0 mol %.

6 . The multilayered capacitor of claim 1 , wherein
An average content of zirconium (Zr) included in entirety of the shell is greater than an average content of zirconium (Zr) included in entirety of the core for a total core.

7 . The multilayered capacitor of claim 1 , wherein
an average content of zirconium (Zr) included in entirety of the shell is in a range from about 0.001 mol % to about 10.0 mol %.

8 . The multilayered capacitor of claim 1 , wherein
an average content of zirconium (Zr) included in entirety of the core is in a range from about 0 mol % to about 2.0 mol %.

9 . The multilayered capacitor of claim 1 , wherein
an average thickness of the dielectric layer is in a range from about 0.1 μm to about 5 μm.

10 . The multilayered capacitor of claim 1 , wherein
an average thickness of the internal electrode is in a range from about 0.1 μm to about 2 μm.

11 . A multilayered capacitor, comprising
a capacitor body including a dielectric layer and an internal electrode, and an external electrode outside the capacitor body, wherein the internal electrode includes a conductive metal and zirconium (Zr), the dielectric layer includes a plurality of dielectric grains, at least one of the plurality of dielectric grains has a core-shell structure, the core, the shell, or both include zirconium (Zr), an average content of Zr in the core is less than about 1 mol %, and an average content of Zr in the shell is in a range from about 0.001 mol % to about 10 mol %.

12 . The multilayered capacitor of claim 11 , wherein
the dielectric grain includes a main component and a subcomponent, and the main component includes Ba m TiO 3 (0.995≤m≤1.010), (Ba 1-x Ca x ) m (Ti 1-y Zr y )O 3 (0.995≤m≤1.010, 0≤x≤0.10, 0<y≤0.20), Ba m (Ti 1-x Zr x )O 3 (0.995≤m≤1.010, x≤0.10), (Ba 1-x Ca x ) m (Ti 1-y Sn y )O 3 (0.995≤m≤1.010, 0≤x≤0.10, 0<y≤0.20), or a combination thereof.

13 . The multilayered capacitor of claim 12 , wherein
the subcomponent includes zirconium (Zr), manganese (Mn), chromium (Cr), silicon (Si), aluminum (Al), magnesium (Mg), tin (Sn), antimony (Sb), hafnium (Hf), and germanium (Ge), gallium (Ga), indium (In), lanthanum (La), yttrium (Y), actinium (Ac), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), Terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), or a combination thereof.

14 . The multilayered capacitor of claim 11 , wherein
an average content of zirconium (Zr) for the internal electrode is in a range from about 0.0005 mol % to about 5.0 mol %.

15 . The multilayered capacitor of claim 11 , wherein
an average content of zirconium (Zr) included in entirety of the shell is greater than an average content of zirconium (Zr) included in entirety of the core.

16 . The multilayered capacitor of claim 11 , wherein
an average content of zirconium (Zr) for the internal electrode is in a range from about 0.001 mol % to about 1.0 mol %.

17 . The multilayered capacitor of claim 11 , wherein
an average thickness of the dielectric layer is in a range from about 0.1 μm to about 5 μm.

18 . The multilayered capacitor of claim 11 , wherein
an average thickness of the internal electrode is in a range from about 0.1 μm to about 2 μm.

19 . A multilayered capacitor, comprising:
an internal electrode comprising zirconium (Zr) and a conductive metal, wherein an average content of Zr in the internal electrode is in a range from about 0.0005 mol % to about 5.0 mol %; and a dielectric layer comprising at least one dielectric grain having a core-shell structure, wherein core of the core-shell structure has an average Zr content of less than 1 mol %, and shell of the core-shell structure has an average Zr content in a range from about 0.001 mol % to about 10 mol %.

Assignees

• Samsung Electro Mech

Inventors

• Jeong Munseong
• Kim Jungmin
• Park Jinkyung
• Hwang Hyunjun
• Jang Changsoo
• Jang Won Seok
• Kim Nayoung

Classifications

• H01G4/1227

  based on alkaline earth titanates · CPC title

• H01G4/30

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

• H01G4/0085 Primary

  Fried electrodes · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• C04B35/468

  based on barium titanates · CPC title