Capacitor component

Patent metadata

Field	Value
Publication number	US-11094460-B2
Application number	US-201916275795-A
Country	US
Kind code	B2
Filing date	Feb 14, 2019
Priority date	Aug 22, 2018
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A capacitor component includes: a body including a dielectric layer and first and second internal electrodes alternately disposed with the dielectric layer interposed therebetween; first and second external electrodes including first and second connection portions, and first and second band portions extending onto portions of a surface from the first and second connection portions, respectively; first and second plating layers disposed on the first and second band portions, respectively; humidity resistant layers disposed between the first and second external electrodes, disposed on the first and second external electrodes, and having openings respectively exposing portions of the first and second band portions. The first and second plating layers are disposed in the openings of the humidity resistant layers, respectively, and are in contact with the first and second band portions, respectively.

First claim

What is claimed is:

1. A capacitor component comprising:
a body including a dielectric layer and first and second internal electrodes alternately disposed with the dielectric layer interposed therebetween, and having first and second surfaces opposing each other in a thickness direction of the body, third and fourth surfaces connected to the first and second surfaces and opposing each other in a length direction of the body, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a width direction of the body;
first and second external electrodes including first and second connection portions disposed on the third and fourth surfaces of the body, respectively, and first and second band portions extending onto portions of the first surface from the first and second connection portions, respectively;
first and second plating layers disposed on the first and second band portions, respectively; and
a humidity resistant layer, as an integral layer, disposed on the first and second external electrodes, and having first and second openings exposing portions of the first and second band portions disposed on the first surface, respectively,
wherein the first and second plating layers are disposed in the first and second openings of the humidity resistant layer, respectively, and are in contact with the first and second band portions, respectively,
the humidity resistant layer includes first portions opposing each other in the width direction and disposed on the first surface, the first portions of the humidity resistant layer provided as edges of the first opening which exposes the portion of the first band portion, and
the humidity resistant layer includes second portions opposing each other in the width direction and disposed on the first surface, the second portions of the humidity resistant layer provided as edges of the second opening which exposes the portion of the second band portion.

2. The capacitor component of claim 1 , wherein the humidity resistant layer is disposed on portions of the first and second external electrodes on which the first and second plating layers are not disposed, and on portions of the body on which the first and second external electrodes are not disposed.

3. The capacitor component of claim 1 , wherein the humidity resistant layer is a single integral layer covering the entirety of portions of the first, second, fifth, and sixth surfaces of the body between the first and second external electrodes, and covering the entirety of the first and second external electrodes including the first and second connection portions except the portions exposed by the openings.

4. The capacitor component of claim 1 , wherein the first and second plating layers are disposed on the first and second band portions on only the first surface among the first to sixth surfaces.

5. The capacitor component of claim 1 , wherein each of the first and second plating layers includes a Ni-plating layer and a Sn-plating layer disposed on the Ni-plating layer.

6. The capacitor component of claim 1 , wherein the humidity resistant layer is formed by atomic layer deposition (ALD), molecular layer deposition (MLD), or chemical vapor deposition (CVD).

7. The capacitor component of claim 1 , wherein the humidity resistant layer contains aluminum oxide (Al 2 O 3 ).

8. The capacitor component of claim 1 , wherein the humidity resistant layer is formed by ALD, and contains aluminum oxide (Al 2 O 3 ).

9. The capacitor component of claim 1 , wherein the first and second external electrodes contain a conductive metal and glass.

10. The capacitor component of claim 1 , wherein each of the plating layers has a rectangular or circular shape, when viewed on the first surface.

11. The capacitor component of claim 1 , wherein each of the plating layers is disposed in a center portion of each of the band portions, when viewed on the first surface.

12. The capacitor component of claim 1 , further comprising a hydrophobic layer disposed on the humidity resistant layer.

13. A capacitor component comprising:
a body including a dielectric layer and first and second internal electrodes alternately disposed with the dielectric layer interposed therebetween, and having first and second surfaces opposing each other in a thickness direction of the body, third and fourth surfaces connected to the first and second surfaces and opposing each other in a length direction of the body, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a width direction of the body;
first and second external electrodes, each including first and second connection portions disposed on the third and fourth surfaces of the body, respectively, and first and second band portions extended to a portion of the first surface from the first and second connection portions, respectively;
first and second plating layers disposed on the first and second band portions, respectively, and extending onto portions of the first and second connection portions, respectively; and
a humidity resistant layer, as an integral layer, disposed on the first and second external electrodes, and having a first opening respectively exposing a portion of the first band portion on the first surface and a portion of the first connection portion, and a second opening exposing a portion of the second band portion on the first surface and a portion of the second connection portion,
wherein the first plating layer is disposed in the first opening of the humidity resistant layer, and is in contact with the first band portion and the first connection portion,
the second plating layer is disposed in the second opening of the humidity resistant layer, and is in contact with the second band portion and the second connection portion,
the humidity resistant layer includes first portions opposing each other in the width direction and disposed on the first surface, the first portions of the humidity resistant layer provided as edges of the first opening which exposes the portion of the first band portion, and
the humidity resistant layer includes second portions opposing each other in the width direction and disposed on the first surface, the second portions of the humidity resistant layer provided as edges of the second opening which exposes the portion of the second band portion.

14. The capacitor component of claim 13 , wherein the humidity resistant layer is disposed on portions of the first and second external electrodes on which the first and second plating layers are not disposed, and on portions of the body on which the first and second external electrodes are not disposed.

15. The capacitor component of claim 13 , wherein the first and second plating layers include a Ni-plating layer and a Sn-plating layer disposed on the Ni-plating layer.

16. The capacitor component of claim 13 , wherein a portion of each of the first and second connection portions occupies half or less of a distance from the first surface to the second surface.

17. The capacitor component of claim 13 , wherein the humidity resistant layer is formed by ALD, and contains aluminum oxide (Al 2 O 3 ).

18. The capacitor component of claim 13 , wherein each of the first and second external electrodes contains a conductive metal and glass.

19. The capacitor component of claim 13 , further comprising a hydrophobic layer disposed on the one integral layer.

20. A capacitor component comprising: a body including a dielectric layer and first and second internal electrod

Assignees

• Samsung Electro Mech

Inventors

• Yang Jeong Suong
• Koo Bon Seok
• Cho Sung Min
• Jung Woong Do
• Lee Hai Joon

Classifications

• H01G4/30 Primary

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

• H01G4/228

  Terminals · CPC title

• H01G4/12

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

• H01G4/252 Primary

  the terminals being coated on the capacitive element (H01G4/232 takes precedence) · CPC title

• H01G4/232

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