Capacitor component having external electrodes with reduced thickness

Patent metadata

Field	Value
Publication number	US-10748710-B2
Application number	US-201916717745-A
Country	US
Kind code	B2
Filing date	Dec 17, 2019
Priority date	Jan 2, 2017
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A capacitor component includes a body having a first surface and a second surface opposing each other and including a multilayer structure in which a plurality of dielectric layers are stacked and first and second internal electrodes are alternately disposed with respective dielectric layers interposed therebetween and exposed to the first surface and the second surface, respectively, first and second metal layers covering the first surface and the second surface and connected to the first and second internal electrodes, respectively, first and second ceramic layers covering the first and second metal layers, and first and second external electrodes covering the first and second ceramic layers and connected to the first and second metal layers to be electrically connected to the first and second internal electrodes, respectively.

First claim

What is claimed is:

1. A capacitor component comprising:
a body having a first surface and a second surface opposing each other, third and fourth surfaces opposing each other in a stacking direction while respectively connecting the first and second surfaces to each other, and fifth and sixth surfaces opposing each other while respectively connecting the first and second surfaces to each other, and including a multilayer structure in which a plurality of dielectric layers are stacked in the stacking direction and first and second internal electrodes are alternately disposed with respective dielectric layers interposed therebetween and exposed to the first surface and the second surface, respectively;
first and second metal layers covering the first surface and the second surface and connected to the first and second internal electrodes, respectively;
first and second ceramic layers covering the first and second metal layers, respectively; and
first and second external electrodes disposed on the first and second surfaces, and covering the first and second ceramic layers, and connected to the first and second metal layers to be connected to the first and second internal electrodes, respectively,
wherein the first metal layer is disposed only on the first surface among the first, third and fourth surfaces and extends from an edge where the first surface and the fifth surface meet to an edge where the first surface and the sixth surface meet,
the second metal layer is disposed only on the second surface among the second, third and fourth surfaces and extends from an edge where the second surface and the fifth surface meet to an edge where the second surface and the sixth surface meet, and
the first and second external electrodes extend to cover the third and fourth surfaces of the body, respectively.

2. The capacitor component of claim 1 , wherein each of the first and second metal layers has a uniform thickness.

3. The capacitor component of claim 1 , wherein the first and second ceramic layers cover the entire first metal layer and the entire second metal layer, respectively.

4. The capacitor component of claim 1 , wherein areas of the first metal layer and the first ceramic layer, in relation to the first surface of the body, are the same as each other, and areas of the second metal layer and the second ceramic layer, in relation to the second surface of the body, are the same as each other.

5. The capacitor component of claim 1 , wherein the first and second external electrodes have multilayer structures, respectively.

6. The capacitor component of claim 5 , wherein each of the first and second external electrodes includes a first layer that is a sintered electrode and a second layer covering the first layers.

7. The capacitor component of claim 1 , further comprising a third metal layer disposed between the first ceramic layer and the first external electrode, and a fourth metal layer disposed between the second ceramic layer and the second external electrode.

8. The capacitor component of claim 7 , wherein the first and second metal layers and the third and fourth metal layers are formed of the same material.

9. The capacitor component of claim 7 , wherein areas of the first and third metal layers and the first ceramic layer, in relation to the first surface of the body, are the same as one another, and areas of the second and fourth metal layers and the second ceramic layer, in relation to the second surface of the body, are the same as one another.

10. The capacitor component of claim 1 , wherein the first and second metal layers include a Ni component.

11. The capacitor component of claim 1 , wherein the first and second ceramic layers are formed of the same material as that of the plurality of dielectric layers.

12. The capacitor component of claim 1 , wherein a weight ratio of organic material components in the first and second ceramic layers to the remaining material components in the first and second ceramic layer is greater than a weight ratio of organic material components in the plurality of dielectric layers to the remaining material components in the plurality of dielectric layers.

13. The capacitor component of claim 1 , wherein extending portions of the first external electrode to cover the third surface and the fourth surface, respectively, are in contact with ends of the first metal layer and ends of the first ceramic layer, and
extending portions of the second external electrode to cover the third surface and the fourth surface, respectively, are in contact with ends of the second metal layer and ends of the second ceramic layer.

14. The capacitor component of claim 1 ,
wherein the first external electrode is in contact with opposing ends of the first metal layer and opposing ends of the first ceramic layer, and
the second external electrode is in contact with opposing ends of the first metal layer and opposing ends of the first ceramic layer.

15. A capacitor component comprising:
a body having a first surface and a second surface opposing each other and third and fourth surfaces opposing each other in a stacking direction while respectively connecting the first and second surfaces to each other, and including a multilayer structure in which a plurality of dielectric layers are stacked in the stacking direction and first and second internal electrodes are alternately disposed with respective dielectric layers interposed therebetween and exposed to the first surface and the second surface, respectively;
first and second metal layers covering the first surface and the second surface and connected to the first and second internal electrodes, respectively;
first and second ceramic layers covering the first and second metal layers, respectively;
third and fourth metal layers covering the first and second ceramic layers, respectively;
a first external electrode connected to the first and third metal layers to be connected to the first internal electrodes; and
a second external electrode connected to the second and fourth metal layers to be connected to the second internal electrodes,
wherein the first metal layer is disposed only on the first surface among the first, third and fourth surfaces,
the second metal layer is disposed only on the second surface among the second, third and fourth surfaces,
the first external electrode includes a first layer disposed on ends of the first metal layer, the first ceramic layer, and the third metal layer, and includes a second layer covering the first layer and disposed on the first surface to be in direct contact with the third metal layer, and
the second external electrode includes a third layer disposed on ends of the second metal layer, the second ceramic layer, and the fourth metal layer, and includes a fourth layer covering the third layer and disposed on the second surface to be in direct contact with the fourth metal layer.

16. The capacitor component of claim 15 , wherein each of the first and second metal layers has a uniform thickness.

Assignees

• Samsung Electro Mech

Inventors

• Cho Sung Hyun
• Kwon Byeong Chan
• Yun Yong Jin
• Hong Ki Pyo
• Choi Jae Yeol

Classifications

• H01G4/2325 Primary

  characterised by the material of the terminals · CPC title

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• H01G4/30 Primary

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

• B43M99/008

  Desk-receptacles for holding writing appliances · CPC title

• H01G13/006

  Apparatus or processes for applying terminals · CPC title