CAPACITOR COMPONENT

• US 20160027584A1
• Filed: 07/13/2015
• Published: 01/28/2016
• Est. Priority Date: 07/24/2014
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: HATTORI, Kazuo
• Granted Patent: US 9,666,374 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01G 4/12 Ceramic dielectrics H01G4/085 takes precedence
• CPC Class Codes: H01G 4/224 Housing; Encapsulation
• CPC Class Codes: H01G 4/232 electrically connecting two or more layers of a stacked or rolled capacitor
• CPC Class Codes: H01G 4/30 Stacked capacitors H01G4/33 takes precedence

Abstract

A capacitor component includes an element assembly, a first external electrode, and a second external electrode. The element assembly includes first and second internal electrode layers, a first connecting conductive layer extending along a fifth outer surface of the element assembly and connected to each of the first internal electrode layers, a first covering insulating layer covering the first connecting conductive layer, a second connecting conductive layer extending along a sixth outer surface of the element assembly and connected to each of the second internal electrode layers, and a second covering insulating layer covering the second connecting conductive layer. Only a portion of the first internal electrode layers are extended to the third outer surface and connected to the first external electrode, and only a portion of the internal electrode layers are extended to the fourth outer surface and connected to the second external electrode.

Claims

1. A capacitor component comprising:

an element assembly including;

a first outer surface and a second outer surface opposing each other;

a third outer surface and a fourth outer surface opposing each other; and

a fifth outer surface and a sixth outer surface opposing each other;

a first external electrode disposed on the third outer surface; and

a second external electrode disposed on the fourth outer surface;

wherein

the element assembly includes a plurality of dielectric layers and a plurality of internal electrode layers alternately laminated in a laminating direction perpendicular or substantially perpendicular to the first outer surface;

the plurality of internal electrode layers include;

a plurality of first internal electrode layers electrically connected to the first external electrode; and

a plurality of second internal electrode layers electrically connected to the second external electrode;

wherein

the element assembly further includes;

a first connecting conductive layer extending along the fifth outer surface and connecting to an end portion on the fifth outer surface side of each of the plurality of first internal electrode layers; and

a first covering insulating layer covering the first connecting conductive layer and defining the fifth outer surface;

at least one of the plurality of first internal electrode layers extend to the third outer surface and connect to the first external electrode; and

at least one of the plurality of first internal electrode layers are separated from the third outer surface.

2. The capacitor component according to claim 1, wherein the first connecting conductive layer extends to the third outer surface and is connected to the first external electrode.

3. The capacitor component according to claim 1, wherein the element assembly includes:

a second connecting conductive layer extending along the sixth outer surface and connecting to an end portion on the sixth outer surface side of each of the plurality of second internal electrode layers; and

a second covering insulating layer covering the second connecting conductive layer and defining the sixth outer surface;

wherein

at least one of the plurality of second internal electrode layers extend to the fourth outer surface and connect to the second external electrode; and

at least one of the plurality of second internal electrode layers are separated from the fourth outer surface.

4. The capacitor component according to claim 3, wherein the second connecting conductive layer is extended to the fourth outer surface and connected to the second external electrode.

5. The capacitor component according to claim 3, wherein the element assembly includes:

a plurality of first auxiliary conductive layers positioned in a same plane perpendicular or substantially perpendicular to the laminating direction as each of the plurality of second internal electrode layers and connected to the first connecting conductive layer; and

a plurality of second auxiliary conductive layers positioned in a same plane perpendicular or substantially perpendicular to the laminating direction as each of the plurality of first internal electrode layers and connected to the second connecting conductive layer.

6. The capacitor component according to claim 1, wherein

the element assembly includes a second covering insulating layer defining the sixth outer surface;

and

the plurality of the second internal conductive layer are directly covered by the second covering insulating layer.

7. The capacitor component according to claim 3, wherein

the first connecting conductive layer is extended to the third outer surface and connected to the first external electrode;

and

the second connecting conductive layer is extended to the fourth outer surface and connected to the second external electrode.

8. The capacitor component according to claim 3, wherein

all of the first internal electrode layers are connected to the first external electrode;

all of the second internal electrode layers are connected to the second external electrode;

the first connecting conductive layer is connected to the first external electrode; and

the second connecting conductive layer is connected to the second external electrode.

9. The capacitor component according to claim 3, wherein

the plurality of first internal electrode layers and the first connecting conductive layer are extended to the third outer surface and connected to the first external electrode;

and

the plurality of second internal electrode layers and the second connecting conductive layer are extended to the fourth outer surface and connected to the second external electrode.

10. A capacitor component comprising:

an element assembly including;

a first outer surface and a second outer surface opposing each other;

a third outer surface and a fourth outer surface opposing each other; and

a fifth outer surface and a sixth outer surface opposing each other;

a first external electrode disposed on the third outer surface; and

a second external electrode disposed on the fourth outer surface;

wherein

the element assembly includes a plurality of dielectric layers and a plurality of internal electrode layers alternately laminated in a laminating direction perpendicular or substantially perpendicular to the first outer surface;

the plurality of internal electrode layers include;

a plurality of first internal electrode layers electrically connected to the first external electrode; and

a plurality of second internal electrode layers electrically connected to the second external electrode;

the element assembly further includes;

a first connecting conductive layer extending along the fifth outer surface and connecting to an end portion on the fifth outer surface side of each of the plurality of first internal electrode layers; and

a first covering insulating layer covering the first connecting conductive layer and defining the fifth outer surface; and

the first connecting conductive layer is extended to the third outer surface and connected to the first external electrode.

11. The capacitor component according to claim 10, wherein the element assembly includes:

a second connecting conductive layer extending along the sixth outer surface and connecting to an end portion on the sixth outer surface side of each of the plurality of second internal electrode layers; and

a second covering insulating layer covering the second connecting conductive layer and defining the sixth outer surface;

wherein

the second connecting conductive layer is extended to the fourth outer surface and connected to the second external electrode.

12. The capacitor component according to claim 11, wherein the element assembly includes:

a first auxiliary conductive layer positioned in a same plane perpendicular or substantially perpendicular to the laminating direction as each of the plurality of second internal electrode layers and connected to the first connecting conductive layer; and

a second auxiliary conductive layer positioned in a same plane perpendicular or substantially perpendicular to the laminating direction as each of the plurality of first internal electrode layers and connected to the second connecting conductive layer.

13. The capacitor component according to claim 11, wherein

the element assembly includes a second covering insulating layer defining the sixth outer surface;

and

the plurality of the second internal conductive layer are directly covered by the second covering insulating layer.

14. The capacitor component according to claim 11, wherein

the first connecting conductive layer is extended to the third outer surface and connected to the first external electrode;

and

the second connecting conductive layer is extended to the fourth outer surface and connected to the second external electrode.

15. The capacitor component according to claim 11, wherein

all of the first internal electrode layers are connected to the first external electrode;

all of the second internal electrode layers are connected to the second external electrode;

the first connecting conductive layer is connected to the first external electrode; and

the second connecting conductive layer is connected to the second external electrode.

16. The capacitor component according to claim 11, wherein

the plurality of first internal electrode layers and the first connecting conductive layer are extended to the third outer surface and connected to the first external electrode;

and

the plurality of second internal electrode layers and the second connecting conductive layer are extended to the fourth outer surface and connected to the second external electrode.