Capacitor component

Patent metadata

Field	Value
Publication number	US-10923284-B2
Application number	US-201916441466-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Dec 11, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A capacitor component includes a body including dielectric layers and internal electrodes alternately arranged with the dielectric layers; and external electrodes including electrode layers disposed on the body and connected to the internal electrodes, first conductive resin layers disposed on the electrode layers, and second conductive resin layers disposed on the first conductive resin layers, wherein the first and second conductive resin layers include a metal powder and a base resin, the first conductive resin layers have a lower metal powder content than the second conductive resin layers, the metal powder includes one or more of flake-type powder particle and spherical-type powder particle, and a weight ratio of the flake-type powder particle in the metal powder contained in the first conductive resin layers is 60% or more, and a weight ratio of the spherical-type powder particle in the metal powder contained in the second conductive resin layers is 50% or more.

First claim

What is claimed is:

1. A capacitor component comprising:
a body including dielectric layers and internal electrodes alternately arranged with the dielectric layers; and
external electrodes including electrode layers disposed on the body and connected to the internal electrodes, first conductive resin layers disposed on the electrode layers, and second conductive resin layers disposed on the first conductive resin layers,
wherein the first and second conductive resin layers include a metal powder and a base resin,
the first conductive resin layers have a lower metal powder content than the second conductive resin layers,
the metal powder includes flake-type powder particle and/or spherical-type powder particle, and
a weight ratio of the flake-type powder particle in the metal powder contained in the first conductive resin layers is 60% or more, and a weight ratio of the spherical-type powder particle in the metal powder contained in the second conductive resin layers is 50% or more.

2. The capacitor component according to claim 1 , wherein the spherical-type powder particle has a length ratio (major axis/minor axis) of a major axis to a minor axis of 1.45 or less.

3. The capacitor component according to claim 1 , wherein the flake-type powder particle has a length ratio (major axis/minor axis) of a major axis to a minor axis of 1.95 or more.

4. The capacitor component according to claim 1 , wherein the metal powder comprises at least one selected from the group consisting of copper (Cu), silver (Ag), nickel (Ni), and alloys thereof.

5. The capacitor component according to claim 1 , wherein a thickness of the second conductive resin layers are 10% or more and 30% or less of a thickness of the first conductive resin layers.

6. The capacitor component according to claim 1 , wherein a content of the metal powder in the first conductive resin layers is 60 wt % or less, and a content of the metal powder in the second conductive resin layers is 75 wt % or more.

7. The capacitor component according to claim 1 , wherein the base resin included in the first conductive resin layers comprises one or more selected from the group consisting of an acryl resin, a urethane polymer, and a core-shell rubber.

8. The capacitor component according to claim 1 , wherein the base resin included in the second conductive resin layers comprises one or more selected from the group consisting of an ultra-high polymer resin, an oligomer resin, and a high heat-resistant epoxy resin.

9. The capacitor component according to claim 1 , wherein the electrode layers comprise a conductive metal and a glass.

10. The capacitor component according to claim 1 , wherein the external electrodes further comprise a plated layer disposed on the second conductive resin layers.

11. The capacitor component according to claim 10 , wherein the plated layer is a nickel (Ni) plated layer or a tin (Sn) plated layer.

12. The capacitor component according to claim 1 ,
wherein the body comprises first and second surfaces disposed opposite to each other, third and fourth surfaces connected to the first and second surfaces and disposed opposite to each other, and fifth and sixth surfaces connected to the first to fourth surfaces and disposed opposite to each other,
the external electrodes comprise first and second external electrodes respectively disposed on the third and fourth surfaces, wherein the first and second external electrodes include a band portion extending to a portion of the first and second surfaces, and
in the first external electrode, a distance between the third surface and an end of the band portion in the first conductive resin layer is 10 to 20 times a thickness of the first conductive resin layer.

13. The capacitor component according to claim 12 , wherein, in the first external electrode, the distance between the third surface and an end of the band portion in the first conductive resin layer is shorter than a distance between the third surface and an end of the band portion in the second conductive resin layer, and is longer than a distance between the third surface and an end of the band portion in the electrode layer.

14. The capacitor component according to claim 1 , wherein the weight ratio of the flake-type powder particle in the metal powder contained in the first conductive resin layers is more than a weight ratio of the spherical-type powder particle in the metal powder contained in the first conductive resin layers.

15. The capacitor component according to claim 1 , wherein the weight ratio of the spherical-type powder particle in the metal powder contained in the second conductive resin layers is equal to or more than a weight ratio of the flake-type powder particle in the metal powder contained in the second conductive resin layers.

Assignees

• Samsung Electro Mech

Inventors

• Yun Geum Hee
• Lee Hwa Young
• Paek Kwan Yeol
• Seo Jeong Wook
• Jung Ha Yong

Classifications

• H01G4/12

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

• H01G4/30 Primary

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

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• H01G4/2325 Primary

  characterised by the material of the terminals · CPC title

• H01G4/232

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