IP Library › Granted Patent US 12700543

Granted Patent B2

US 12700543 · App. 18/442,627 · Granted Aug 4, 2026

Multilayer capacitor including external electrode having conductive resin layer with thickness reduced in part

Inventors: Chaedong Lee (Suwon-si, KR); Seung Ah Kim (Suwon-si, KR); Gyuho Yeon (Suwon-si, KR); Byungjun Jeon (Suwon-si, KR)

Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.

H01G4/2325 H01G4/30

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Quick Facts

Patent No.: US 12700543
App. No.: 18/442,627
Granted: Aug 4, 2026
Kind: B2

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Abstract

A multilayer capacitor includes a capacitor body including a first internal electrode and a second internal electrode stacked with a dielectric layer interposed therebetween, the capacitor body having a first surface and a second surface opposite each other and a third surface extending between the first and second surfaces; and an external electrode including a connection portion disposed at the third surface, and a band portion extending from the connection portion to the first surface and the second surface. The external electrode includes a base electrode in contact with the capacitor body, and a conductive resin layer disposed to cover the base electrode at least partially. A thickness of the conductive resin layer at an end part of the base electrode on the first surface and a thickness of the conductive resin layer at an end part of the base electrode on the second surface are different from each other.

Claims (42)

1 . A multilayer capacitor comprising:

a capacitor body including a dielectric layer, and a first internal electrode and a second internal electrode stacked in a thickness direction with the dielectric layer interposed therebetween, a length direction vertical to the thickness direction, and a width direction vertical to the thickness direction and the length direction, the capacitor body having a first surface and a second surface opposite each other in the thickness direction, a third surface and a fourth surface opposite each other in the length direction, and a fifth surface and a sixth surface opposite each other in the width direction; and

first and second external electrodes respectively including a connection portion disposed at the third surface and the fourth surface of the capacitor body, and a band portion extending from the connection portion to the first surface and the second surface,

wherein the first and second external electrodes comprise a base electrode in contact with the capacitor body, and a conductive resin layer disposed to cover the base electrode at least partially, respectively,

a thickness of the conductive resin layer at an end part of the base electrode on the first surface measured in a vertical direction with respect to the first surface, and a thickness of the conductive resin layer at an end part of the base electrode on the second surface measured in a vertical direction with respect to the second surface are different from each other, and

the conductive resin layer covers a portion of each of the fifth surface and the sixth surface and extends continuously from the portion of the fifth surface to the portion of the sixth surface to cover a portion of the first surface and a portion of the second surface.

2 . The multilayer capacitor of claim 1 , wherein:

a length of the band portion on the first surface measured in the length direction is greater than or equal to a length of the band portion on the second surface measured in the length direction.

3 . The multilayer capacitor of claim 2 , wherein:

a length of the conductive resin layer of the band portion at the first surface measured in the length direction is greater than or equal to a length of the conductive resin layer of the band portion at the second surface measured in the length direction.

4 . The multilayer capacitor of claim 1 , wherein:

the thickness of the conductive resin layer at the end part of the base electrode on the first surface measured in the vertical direction with respect to the first surface is thicker than the thickness of the conductive resin layer at the end part of the base electrode on the second surface measured in the vertical direction with respect to the second surface.

5 . The multilayer capacitor of claim 4 , wherein:

the thickness of the conductive resin layer at the end part of the base electrode on the first surface is thicker than 1.5 times and thinner than or equal to 2 times of the thickness of the conductive resin layer at the end part of the base electrode on the second surface.

6 . The multilayer capacitor of claim 1 , wherein:

the connection portion of the first or second external electrode includes a lower portion close to the first surface and an upper portion close to the second surface, bounded by a middle point between the first surface and the second surface, and

a thickness of the lower portion measured in a vertical direction with respect to the third or fourth surface where the first or second external electrode is disposed and a thickness of the upper portion measured in the vertical direction with respect to the third or fourth surface where the first or second external electrode is disposed are different from each other.

7 . The multilayer capacitor of claim 6 , wherein:

the connection portion of the first or second external electrode includes quarters between the first surface and the second surface, and a thickness of the connection portion of the first or second external electrode at a quarter point close to the first surface is thicker than a thickness of the connection portion of the first or second external electrode at another quarter point close to the second surface.

8 . The multilayer capacitor of claim 7 , wherein:

the connection portion has a part having a thickness increasing from the upper portion to the lower portion.

9 . The multilayer capacitor of claim 6 , wherein:

a thickness of the conductive resin layer of the lower portion measured in the vertical direction with respect to the third or fourth surface where the first or second external electrode is disposed and a thickness of the conductive resin layer of the upper portion measured in the vertical direction with respect to the third or fourth surface where the first or second external electrode is disposed are different from each other.

10 . The multilayer capacitor of claim 9 , wherein:

the conductive resin layer of the connection portion includes quarters between the first surface and the second surface, and the conductive resin layer of the connection portion is thicker at a quartering point close to the first surface than at a quartering point close to the second surface.

11 . The multilayer capacitor of claim 10 , wherein:

the conductive resin layer of the connection portion has a portion having a thickness increasing from the upper portion to the lower portion.

12 . The multilayer capacitor of claim 9 , wherein:

the conductive resin layer has a thickness at a quartering point close to the first surface more than twice as a thickness at a quartering point close to the second surface and less than or equal to three times as thin as the thickness at the quartering point close to the second surface.

13 . The multilayer capacitor of claim 1 , wherein:

the conductive resin layer includes conductive metal particles dispersed in a resin.

14 . The multilayer capacitor of claim 13 , wherein:

the base electrode includes a conductive metal and glass.

15 . A multilayer capacitor comprising:

a capacitor body including a dielectric layer, and a first internal electrode and a second internal electrode stacked in a thickness direction with the dielectric layer interposed therebetween, a length direction vertical to the thickness direction, and a width direction vertical to the thickness direction and the length direction, the capacitor body having a first surface and a second surface opposite each other in the thickness direction, and a third surface and a fourth surface opposite each other in the length direction; and

a thickness, in a vertical direction with respect to the third or fourth surface, of one portion of the conductive resin layer where the first or second external electrode is disposed decreases and then increases along the thickness direction, and

the one portion of the conductive resin layer having the thickness decreasing and then increasing along the thickness direction covers at least the middle point between the first surface and the second surface.

16 . The multilayer capacitor of claim 15 , wherein:

thickness of the conductive resin layer of the lower portion measured in the vertical direction with respect to the third or fourth surface where the first or second external electrode is disposed is greater than a thickness of the conductive resin layer of the upper portion measured in the vertical direction with respect to the third or fourth surface where the first or second external electrode is disposed.