Capacitor component and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-2020234884-A1
Application number	US-201916381673-A
Country	US
Kind code	A1
Filing date	Apr 11, 2019
Priority date	Jan 22, 2019
Publication date	Jul 23, 2020
Grant date	—

Abstract

A capacitor component includes: a body including a plurality of dielectric layers and a plurality of internal electrodes stacked opposingly in a first direction, and having first and second surfaces opposing each other in the first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction; and an external electrode disposed on the body and connected to the plurality of internal electrodes. The second surface includes a plurality of convex portions spaced apart from each other.

First claim

What is claimed is:

1 . A capacitor component, comprising:
a body including a plurality of dielectric layers and a plurality of internal electrodes, stacked opposingly in a first direction, and having first and second surfaces opposing each other in the first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction; and an external electrode disposed on the body and connected to the plurality of internal electrodes, wherein the second surface includes a plurality of convex portions spaced apart from each other.

2 . The capacitor component of claim 1 , wherein the plurality of convex portions include a first convex portion having the greatest height from the second surface and a second convex portion having the next greatest height from the second surface.

3 . The capacitor component of claim 2 , wherein a distance between centers of the first and second convex portions is 300 μm or more.

4 . The capacitor component of claim 2 , wherein a height of the first convex portion is 5 μm or less, and a height of the second convex portion is ⅔ or less of the height of the first convex portion.

5 . The capacitor component of claim 1 , wherein the plurality of convex portions are disposed to be spaced apart from each other in the second direction.

6 . The capacitor component of claim 1 , wherein a height of the convex portion is 5 μm or less.

7 . The capacitor component of claim 1 , wherein the convex portion is circular.

8 . The capacitor component of claim 7 , wherein a diameter of the convex portion is 250 μm or less.

9 . The capacitor component of claim 1 , wherein a distance between convex portions of adjacent dielectric layers is 300 μm or more.

10 . The capacitor component of claim 1 , wherein td>2*te is satisfied, in which to is a thickness of the internal electrode, and td is a thickness of the dielectric layer.

11 . The capacitor component of claim 1 , wherein the external electrode comprises an electrode layer and a conductive resin layer disposed on the electrode layer.

12 . The capacitor component of claim 11 , wherein the electrode layer comprises a glass and one or more conductive metal selected from a group consisting of copper (Cu), silver (Ag), nickel (Ni), alloys thereof.

13 . The capacitor component of claim 11 , wherein the conductive resin layer comprises a base resin and at least one or more conductive metal selected from a group consisting of copper (Cu), silver (Ag), nickel (Ni), alloys thereof.

14 . The capacitor component of claim 1 , wherein a line connecting centers of the plurality of convex portions on the second surface is substantially parallel to the second direction.

15 . The capacitor component of claim 1 , wherein one or more of the plurality of convex portions are disposed on edge at which the second surface and one of the third to sixth surfaces meet.

16 . A capacitor component comprising:
a body including a plurality of dielectric layers and a plurality of internal electrodes, stacked opposingly in a first direction, and having first and second surfaces opposing each other in the first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction; and an external electrode disposed on the body and connected to the plurality of internal electrodes, wherein a first dielectric layer of the plurality of dielectric layers includes a first convex portion spaced apart from a second convex portion of a second dielectric layer of the plurality of dielectric layers adjacent to the first dielectric layer.

17 . The capacitor component of claim 16 , wherein a distance between the centers of the first and second convex portions is 300 μm or more.

18 . The capacitor component of claim 16 , wherein the second surface comprises third and fourth convex portions,
the third convex portion is the first convex portion of the first dielectric layer disposed in the second surface, and the fourth convex portion is located on the second convex portion of the second dielectric layer, in contact with the first dielectric layer.

19 . The capacitor component of claim 18 , wherein a height of the third convex portion from the second surface is 5 μm or less.

20 . The capacitor component of claim 18 , wherein a height of the fourth convex portion from the second surface is ⅔ or less of the height from the second surface of the third convex portion.

21 . A manufacturing method of a capacitor component comprising:
sucking a first ceramic green sheet formed on a first release film by a vacuum hole of an adsorption apparatus and separating the first ceramic green sheet from the first release film; stacking the first ceramic green sheet on a stacked body, and pressurizing the adsorption apparatus against the stacked body, with the first ceramic green sheet being disposed between the adsorption apparatus and the stacked body; sucking a second ceramic green sheet formed on a second release film by the vacuum hole of the adsorption apparatus and separating the second ceramic green sheet from the second release film; and stacking the second ceramic green sheet on the first ceramic green sheet, and pressurizing the adsorption apparatus against the stacked body, with the second ceramic green sheet being disposed between the first ceramic green sheet and the adsorption apparatus, wherein after stacking the second ceramic green sheet, the first sucked portion of the first ceramic green sheet and the second sucked portion of the second ceramic green sheet are spaced apart from each other.

22 . The manufacturing method of the capacitor body of claim 21 , wherein after stacking the second ceramic green sheet, a distance from a center of the second sucked portion of the second ceramic green sheet to a center of the first sucked portion of the first ceramic green sheet located at an uppermost portion of the stacked body is 300 μm or more.

23 . The manufacturing method of the capacitor body of claim 21 , further comprising forming a third ceramic green sheet of the stacked body, prior to stacking the first and second green sheets on the stacked body,
wherein the forming the third ceramic green sheet comprises: sucking a third ceramic green sheet formed on a third release film by the vacuum hole of the adsorption apparatus and separating the third ceramic green sheet from the third release film; and stacking the third ceramic green sheet on ceramic green sheets stacked on each other as a lower portion of the stacked body, and pressurizing the adsorption apparatus against the lower portion of the stacked body, with the third ceramic green sheet being disposed between the adsorption apparatus and the lower portion of the stacked body, and after stacking the second ceramic green sheet, the second sucked portion of the second ceramic green sheet and the third sucked portion of the third ceramic green sheet overlap with each other in a stacking direction along which the first to third ceramic green sheets are stacked.

24 . A capacitor component, comprising:
a body including a plurality of dielectric layers and a plurality of internal electrodes,

Assignees

• Samsung Electro Mech

Inventors

• Lee Dae Sung
• Park Chi Yong
• Choi Bok Gi
• Jung Beak Won
• Kim Dong Gi

Classifications

• H01G4/005

  Electrodes · CPC title

• H01G4/30 Primary

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

• H01G4/1209 Primary

  characterised by the ceramic dielectric material (H01G4/1272, H01G4/1281 take precedence) · CPC title

• H01G4/224

  Housing; Encapsulation · CPC title

• H01G4/12 Primary

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