Electronic component having a plurality of internal electrodes

Patent metadata

Field	Value
Publication number	US-11417465-B2
Application number	US-202117161217-A
Country	US
Kind code	B2
Filing date	Jan 28, 2021
Priority date	Feb 13, 2020
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

A multilayer capacitor includes an element body, an external electrode, and a plurality of internal electrodes, and a relationship of R1<T is satisfied in a first cross section extending in a direction in which the pair of end surfaces face each other, extending in a lamination direction of the plurality of internal electrodes, and including an electrode portions and a connecting portions when a radius of curvature of an edge line surface is R1 and a thickness between the side surface and the internal electrode at a position at which the side surface and the internal electrode are closest to each other in the lamination direction is T.

First claim

What is claimed is:

1. An electronic component comprising:
an element body including a pair of end surfaces facing each other and four side surfaces connecting the pair of end surfaces;
an external electrode disposed on the side surfaces and each of the end surfaces; and
a plurality of internal electrodes disposed in the element body, wherein
the element body includes an edge line surface which is provided between the end surface and each of the side surfaces and which is curved,
the external electrode includes an electrode layer provided across the end surface and a part of at least one of the side surfaces and a plated layer covering the electrode layer,
the plurality of internal electrodes each include an electrode portion disposed to face other internal electrodes and a connecting portion connecting the electrode portion and the external electrode,
a relationship of
R1<T

is satisfied in a first cross section extending in a direction in which the pair of end surfaces face each other, extending in the lamination direction of the plurality of internal electrodes, and including the electrode portion and the connecting portion when a radius of curvature of the edge line surface is R 1 and a thickness between one of the side surfaces and the internal electrode at a position at which one of the side surfaces and the internal electrode are closest to each other in a lamination direction is T, and
a relationship of
R2>T

is satisfied in a second cross section extending in the direction in which the pair of end surfaces face each other, extending in the lamination direction of the plurality of internal electrodes, and including the electrode portions when a radius of curvature of the edge line surface is R 2 .

2. The electronic component according to claim 1 , wherein a width of the connecting portion is smaller than a width of the electrode portion.

3. The electronic component according to claim 2 , wherein the first cross section includes an end portion of the connecting portion exposed to the end surface.

4. The electronic component according to claim 1 , wherein the electrode portion in the second cross section has a portion positioned in a region corresponding to the edge line surface when viewed from a direction perpendicular to the one of the side surfaces which is parallel to the lamination direction.

5. The electronic component according to claim 4 , wherein end portions in a direction in which the pair of end surfaces face each other in the electrode portions in the second cross section of two internal electrodes which are disposed at end portions in the lamination direction of the plurality of internal electrodes have portions positioned in the region corresponding to the edge line surface when viewed from the direction perpendicular to the one of the side surfaces which is parallel to the lamination direction.

6. The electronic component according to claim 1 , wherein the electrode portion in the first cross section has a portion positioned in a region corresponding to the edge line surface when viewed from a direction perpendicular to the one of the side surfaces which is parallel to the lamination direction.

7. The electronic component according to claim 6 , wherein end portions in a direction in which the pair of end surfaces face each other in the electrode portions in the first cross section of two internal electrodes which are disposed at end portions in the lamination direction of the plurality of internal electrodes have portions positioned in the region corresponding to the edge line surface when viewed from the direction perpendicular to the one of the side surfaces which is parallel to the lamination direction.

8. An electronic component comprising:
an element body including a pair of end surfaces facing each other and four side surfaces connecting the pair of end surfaces;
an external electrode disposed on the side surfaces and each of the end surfaces; and
a plurality of internal electrodes disposed in the element body, wherein
the element body includes an edge line surface which is provided between the end surface and each of the side surfaces and which is curved,
the external electrode includes an electrode layer provided across the end surface and a part of at least one of the side surfaces and a plated layer covering the electrode layer,
the plurality of internal electrodes each include an electrode portion disposed to face other internal electrodes and a connecting portion connecting the electrode portion and the external electrode,
a relationship of
R1<T

is satisfied in a first cross section extending in a direction in which the pair of end surfaces face each other, extending in the lamination direction of the plurality of internal electrodes, and including the electrode portion and the connecting portion when a radius of curvature of the edge line surface is R 1 and a thickness between one of the side surfaces and the internal electrode at a position at which the one of the side surfaces and the internal electrode are closest to each other in a lamination direction is T,
one of the side surfaces parallel to the lamination direction has a rectangular shape in which a corner portion is curved, and
a relationship of
R1<R3

is satisfied when a radius of curvature of the corner portion of the one of the side surfaces is R 3 .

9. The electronic component according to claim 1 , wherein a relationship of
R2>T
is satisfied in a second cross section extending in the direction in which the pair of end surfaces face each other, extending in the lamination direction of the plurality of internal electrodes, and including the electrode portions when a radius of curvature of the edge line surface is R 2 .

10. The electronic component according to claim 9 , wherein the electrode portion in the second cross section has a portion positioned in a region corresponding to the edge line surface when viewed from a direction perpendicular to the one of the side surfaces which is parallel to the lamination direction.

11. The electronic component according to claim 10 , wherein end portions in a direction in which the pair of end surfaces face each other in the electrode portions in the second cross section of two internal electrodes which are disposed at end portions in the lamination direction of the plurality of internal electrodes have portions positioned in the region corresponding to the edge line surface when viewed from the direction perpendicular to the one of the side surfaces which is parallel to the lamination direction.

12. The electronic component according to claim 8 , wherein a width of the connecting portion is smaller than a width of the electrode portion.

13. The electronic component according to claim 12 , wherein the first cross section includes an end portion of the connecting portion exposed to the end surface.

14. The electronic component according to claim 8 , wherein the electrode portion in the first cross section has a portion positioned in a region corresponding to the edge line surface when viewed from a direction perpendicular to the one of the side surfaces which is parallel to the lamination direction.

15. The electronic component according to claim 14 , wherein end portions in a direction in which the pair of end surfaces face each other in the electrode portions in the first cross section of two internal electrodes which are disposed at end portions in the lamination direction of the plurality of internal electrodes have portions positioned in the region corresponding to the edge line surface when viewed from the direction perpendicular to the

Assignees

• Tdk Corp

Inventors

• Yoshida Daisuke
• Takahashi Yuki
• Hirabayashi Hikaru
• Okamoto Takuto
• Kimura Masato

Classifications

• H01G4/224

  Housing; Encapsulation · CPC title

• H01G4/232

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

• H01G4/012 Primary

  Form of non-self-supporting electrodes · CPC title

• H01G4/008

  Selection of materials · CPC title

• H01G4/30 Primary

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