IP Library Granted Patent US 12683079
Granted Patent B2
US 12683079 · App. 18/665,829 · Granted Jul 14, 2026

Multilayer ceramic capacitor

Inventor: Kotaro Kishi (Nagaokakyo, JP)
Assignee: MURATA MANUFACTURING CO., LTD.
H01G4/232H01G4/30
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Quick Facts
Patent No.
US 12683079
App. No.
18/665,829
Granted
Jul 14, 2026
Kind
B2
Abstract

In a multilayer ceramic capacitor, when a dimension in a length direction between first and second end surfaces of a multilayer body is l, a dimension in a width direction between first and second lateral surfaces of the multilayer body is w, and a dimension in a height direction between first and second main surfaces of the multilayer body is t, w>l>t, and a dimension in the length direction of each of fourth and fifth surface portions of a first external electrode is larger than a dimension in the length direction of each of second and third surface portions of the first external electrode, and a dimension in the length direction of each of ninth and tenth surface portions of a second external electrode is larger than a dimension in the length direction of each of seventh and eighth surface portions of the second external electrode.

Claims (34)

1 . A multilayer ceramic capacitor comprising:

a multilayer body including a plurality of dielectric layers and a plurality of internal electrode layers that are alternately laminated in a height direction, the multilayer body further including a first main surface and a second main surface which oppose each other in the height direction, a first end surface and a second end surface which oppose each other in a length direction perpendicular or substantially perpendicular to the height direction, and a first lateral surface and a second lateral surface which oppose each other in a width direction perpendicular or substantially perpendicular to the height direction and the length direction;

a first external electrode including a first surface portion located on the first end surface, at least one selected from a second surface portion located on a portion of the first main surface and a third surface portion located on a portion of the second main surface, a fourth surface portion located on a portion of the first lateral surface, and a fifth surface portion located on a portion of the second lateral surface; and

a second external electrode including a sixth surface portion located on the second end surface, at least one selected from a seventh surface portion located on a portion of the first main surface and an eighth surface portion located on a portion of the second main surface, a ninth surface portion located on a portion of the first lateral surface, and a tenth surface portion located on a portion of the second lateral surface; wherein

in a case in which a dimension in the length direction between the first end surface and the second end surface of the multilayer body is defined as I, a dimension in the width direction between the first lateral surface and the second lateral surface of the multilayer body is defined as w, and a dimension in the height direction between the first main surface and the second main surface of the multilayer body is defined as t, a dimensional relationship of w>l>t is satisfied;

a dimension in the length direction of each of the fourth surface portion and the fifth surface portion of the first external electrode is larger than a dimension in the length direction of each of the second surface portion and the third surface portion of the first external electrode;

a dimension in the length direction of each of the ninth surface portion and the tenth surface portion of the second external electrode is larger than a dimension in the length direction of each of the seventh surface portion and the eighth surface portion of the second external electrode;

the internal electrode layers each include a first internal electrode layer and a second internal electrode layer;

the first internal electrode layer includes a first counter electrode portion located in the multilayer body and a first extension portion that is connected to the first counter electrode portion and is exposed at the first end surface, a portion of the first lateral surface, and a portion of the second lateral surface;

a dimension in the length direction of the first extension portion that is exposed at each of the portion of the first lateral surface and the portion of the second lateral surface is larger than the dimension in the length direction of each of the second surface portion and the third surface portion of the first external electrode;

the second internal electrode layer includes a second counter electrode portion located in the multilayer body and a second extension portion that is connected to the second counter electrode portion and is exposed at the second end surface, a portion of the first lateral surface, and a portion of the second lateral surface;

a dimension in the length direction of the second extension portion that is exposed at each of the portion of the first lateral surface and the portion of the second lateral surface is larger than the dimension in the length direction of each of the seventh surface portion and the eighth surface portion of the second external electrode;

the first external electrode includes a first base electrode layer and a first plated layer on the first base electrode layer;

the first plated layer directly covers the first extension portion exposed at the first lateral surface and the second lateral surface;

the second external electrode includes a second base electrode layer and a second plated layer on the second base electrode layer; and

the second plated layer directly covers the second extension portion exposed at the first lateral surface and the second lateral surface.

2 . The multilayer ceramic capacitor according to claim 1 , wherein

the dimension in the length direction of each of the fourth surface portion and the fifth surface portion of the first external electrode is about 110% or more and about 245% or less of the dimension in the length direction of each of the second surface portion and the third surface portion of the first external electrode; and

the dimension in the length direction of each of the ninth surface portion and the tenth surface portion of the second external electrode is about 110% or more and about 245% or less of the dimension in the length direction of each of the seventh surface portion and the eighth surface portion of the second external electrode.

3 . The multilayer ceramic capacitor according to claim 1 , wherein

the first base electrode layer and the second base electrode layer are each a sputtered electrode.

4 . The multilayer ceramic capacitor according to claim 1 , wherein a dimension in the height direction between the first main surface and the second main surface of the multilayer body is about 150 μm or less.

5 . The multilayer ceramic capacitor according to claim 1 , wherein a dimension in the height direction between the first main surface and the second main surface of the multilayer body is about 100 μm or less.

6 . The multilayer ceramic capacitor according to claim 1 , wherein a dimension in the height direction between the first main surface and the second main surface of the multilayer body is about 50 μm or less.

7 . The multilayer ceramic capacitor according to claim 1 , wherein the multilayer body has a rectangular or substantially rectangular parallelepiped shape.

8 . The multilayer ceramic capacitor according to claim 1 , wherein the multilayer body includes at least one of rounded corners or rounded ridges.

9 . The multilayer ceramic capacitor according to claim 1 , wherein a thickness of each of the plurality of dielectric layers is about 0.5 μm or more and about 10 μm or less.

10 . The multilayer ceramic capacitor according to claim 1 , wherein a number of the plurality of dielectric layers is 15 or more and 700 or less.

11 . The multilayer ceramic capacitor according to claim 1 , wherein a thickness of each of the plurality of internal electrodes is about 0.2 μm or more and 2.0 μm or less.

12 . The multilayer ceramic capacitor according to claim 1 , wherein the dimension in the length direction is about 0.05 mm or more and about 0.7 mm or less.

13 . The multilayer ceramic capacitor according to claim 1 , wherein the dimension in the width direction is about 0.15 mm or more and about 1.5 mm or less.

14 . The multilayer ceramic capacitor according to claim 1 , wherein the dimension in the height direction is about 150 μm or less.

15 . The multilayer ceramic capacitor according to claim 1 , wherein the dimension in the height direction is about 100 μm or less.

16 . The multilayer ceramic capacitor according to claim 1 , wherein the dimension in the height direction is about 50 μm or less.