Capacitor component having external electrodes with reduced thickness

Patent metadata

Field	Value
Publication number	US-11869722-B2
Application number	US-202117383901-A
Country	US
Kind code	B2
Filing date	Jul 23, 2021
Priority date	Jan 2, 2017
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

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 in a first direction, 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 in a second direction while respectively connecting the first to fourth surfaces, 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 extending from 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; and
first and second external electrodes covering the first and second metal layers, respectively,
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,
each of the first and second external electrodes extends to cover the third and fourth surfaces of the body,
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 and including a plurality of layers,
on one of the third and fourth surfaces of the body, a maximum dimension, in the stacking direction, of the second layer is greater than a maximum dimension, in the stacking direction, of the first layer, and
the first layer is in contact with end portions of the first metal layer which oppose each other in the stacking direction and end portions of the first metal layer which oppose each other in the second direction.

2. The capacitor component of claim 1 , wherein the second layer of each of the first and second external electrodes includes a plurality of plating layers.

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

4. The capacitor component of claim 1 , wherein the first metal layer extends from, but does not cover the third surface or the fourth surface, and
the second metal layer extends from, but does not cover the third surface or the fourth surface.

5. A capacitor component comprising:
a body having a first surface and a second surface opposing each other in a first direction, 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 in a second direction while respectively connecting the first to fourth surfaces, 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 extending from 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;
third and fourth metal layers each including Ni and respectively disposed on the first and second metal layers, respectively;
a first sintered electrode connecting the first metal layer and the third metal layer to each other; and
a second sintered electrode connecting the second metal layer and the fourth metal layer to each other; and
first and second plating layers covering the third and fourth metal layers, respectively,
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,
each of the first and second plating layers extends to cover the third and fourth surfaces of the body,
on one of the third and fourth surfaces of the body, a maximum dimension, in the stacking direction, of the first plating layer is greater than a maximum dimension, in the stacking direction, of the first sintered electrode, and
the first sintered electrode is in contact with end portions of the first metal layer which oppose each other in the stacking direction and end portions of the first metal layer which oppose each other in the second direction.

6. The capacitor component of claim 5 , wherein each of the first and second metal layers has a uniform thickness.

7. The capacitor component of claim 5 , wherein the first and second metal layers are in contact with the first and second internal electrodes, respectively.

8. The capacitor component of claim 5 , wherein the first sintered electrode is in contact with the third metal layer, and
the second sintered electrode is in contact with each of the second metal layer and the fourth metal layer.

9. The capacitor component of claim 5 , wherein the first and second plating layers are in contact with the third and fourth metal layers, respectively.

10. The capacitor component of claim 5 , wherein the first metal layer extends from, but does not cover the third surface or the fourth surface, and
the second metal layer extends from, but does not cover the third surface or the fourth surface.

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

• H01G4/12

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

• H01G4/30 Primary

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

• H01G13/006

  Apparatus or processes for applying terminals · CPC title