Multilayer ceramic electronic component

• US 10,115,528 B2
• Filed: 12/23/2016
• Issued: 10/30/2018
• Est. Priority Date: 12/25/2015
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Abe, Hirotsugu
• Primary Examiner(s): Ferguson, Dion R
• Application Number:
  US15/389,569
• Publication Number:
  US 20170186552A1
• Time in Patent Office: 676 Days
• Field of Search: None
• CPC Class Codes: H01G 4/005 Electrodes
• CPC Class Codes: H01G 4/012 Form of non-self-supporting electrodes
• 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 4/2325 characterised by the material of the terminals
• CPC Class Codes: H01G 4/248 the terminals embracing or surrounding the capacitive element, e.g. caps H01G4/252 takes precedence
• CPC Class Codes: H01G 4/30 Stacked capacitors H01G4/33 takes precedence
• CPC Class Codes: H01G 4/40 Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations

Abstract

A multilayer ceramic electronic component includes a laminated body including dielectric layers and internal electrode layers, and first and second external electrodes. The laminated body further includes a first conductor layer, a first insulating coating layer, a second conductor layer, and a second insulating coating layer. The surface of the first conductor layer closer to a first end surface is partially connected to the first external electrode. The surface of the second conductor layer closer to a second end surface is partially connected to the second external electrode.

Claims

1. A multilayer ceramic electronic component comprising:

a laminated body including multiple dielectric layers and multiple internal electrode layers laminated, and a first principal surface and a second principal surface opposed in a laminating direction, a first side surface and a second side surface opposed in a width direction perpendicular or substantially perpendicular to the laminating direction, and a first end surface and a second end surface opposed in a length direction perpendicular or substantially perpendicular to both the laminating direction and the width direction;

a first external electrode provided on the first end surface; and

a second external electrode provided on the second end surface;

wherein

the multiple internal electrode layers include multiple first internal electrode layers electrically connected to the first external electrode, and multiple second internal electrode layers electrically connected to the second external electrode;

the laminated body further includes;

a first conductor layer extending along the first side surface and connected to respective ends of the multiple first internal electrode layers at a surface adjacent to the first side surface to connect the multiple first internal electrode layers to each other;

a first insulating coating layer covering a surface of the first conductor layer which is opposite to a surface of the first conductor layer connected to the multiple first internal electrode layers to define the first side surface;

a surface of the first conductor layer adjacent to the first end surface being partially connected to the first external electrode;

a second conductor layer extending along the second side surface and connected to respective ends of multiple second internal electrode layers at a surface adjacent to the second side surface to connect the multiple second internal electrode layers to each other;

a second insulating coating layer covering a surface of the second conductor layer which is opposite to the surface of the second conductor layer connected to the multiple second internal electrode layers to define the second side surface; and

a surface of the second conductor layer adjacent to the second end surface being partially connected to the second external electrode.

2. The multilayer ceramic electronic component according to claim 1, wherein the multilayer ceramic electronic component has a dimension of about 0.48 mm or less in the length direction, and a dimension of about 0.24 mm or less in the width direction.

3. The multilayer ceramic electronic component according to claim 1, wherein

the surface of the first conductor layer adjacent to the first end surface is partially covered with the first external electrode;

a remaining portion of the surface of the first conductor layer not covered with the first external electrode is covered with the first insulating coating layer;

the surface of the second conductor layer adjacent to the second end surface is partially covered with the second external electrode; and

a remaining portion of the surface of the second conductor layer not covered with the second external electrode is covered with the second insulating coating layer.

4. The multilayer ceramic electronic component according to claim 1, wherein the first conductor layer and the second conductor layer each include at least one metal selected from the group consisting of Ni, Cu, Ag, and Pd, or an alloy comprising the one metal.

5. The multilayer ceramic electronic component according to claim 1, wherein the laminated body has a cuboid or substantially cuboid shape and corners and ridges of the laminated body are rounded.

6. The multilayer ceramic electronic component according to claim 1, wherein

the first external electrode extends over each of the first end surface, the first principal surface, the second principal surface, the first side surface, and the second side surface of the laminated body;

and

the second external electrode extends over each of the second end surface, the first principal surface, the second principal surface, the first side surface, and the second side surface of the laminated body.

7. The multilayer ceramic electronic component according to claim 1, wherein the first external electrode and the second external electrode each include a base electrode layer, and a plated layer disposed on the base electrode layer.

8. The multilayer ceramic electronic component according to claim 7, wherein the base electrode layer at least one of a baked layer, a resin layer, and a thin film layer.

9. The multilayer ceramic electronic component according to claim 7, wherein the plated layer a two-layer structure an Ni plated layer and a Sn plated layer provided on the Ni plated layer.

10. The multilayer ceramic electronic component according to claim 1, wherein the multilayer ceramic electronic component is one of a capacitor and an inductor.

11. A multilayer ceramic electronic component comprising:

a laminated body including multiple dielectric layers and multiple internal electrode layers laminated, and a first principal surface and a second principal surface opposed in a laminating direction, a first side surface and a second side surface opposed in a width direction perpendicular or substantially perpendicular to the laminating direction, and a first end surface and a second end surface opposed in a length direction perpendicular or substantially perpendicular to both the laminating direction and the width direction;

a first external electrode provided on the first end surface; and

a second external electrode provided on the second end surface;

wherein

the multiple internal electrode layers include multiple first internal electrode layers electrically connected to the first external electrode, and multiple second internal electrode layers electrically connected to the second external electrode,

the laminated body further includes;

a first insulating coating layer covering respective ends of the multiple first internal electrode layers adjacent to the first side surface to define the first side surface;

a second insulating coating layer covering respective ends of the multiple second internal electrode layers adjacent to the second side surface to define the second side surface;

wherein

a portion of the multiple first internal electrode layers, which is adjacent to the first end surface and extends to the first side surface for each of the multiple first internal electrode layers, being connected to the first external electrode;

a portion of the multiple second internal electrode layers, which is adjacent to the second end surface and extends to the second side surface for each of the multiple second internal electrode layers, being connected to the second external electrode.

12. The multilayer ceramic electronic component according to claim 11, wherein the multilayer ceramic electronic component has a dimension of about 0.48 mm or less in the length direction, and a dimension of about 0.24 mm or less in the width direction.

13. The multilayer ceramic electronic component according to claim 11, wherein

the portion of the multiple first internal electrode layers, which is adjacent to the first end surface at the respective ends of the multiple first internal electrode layers, is partially covered with the first external electrode;

a remaining portion of each of the multiple first internal electrode layers not covered with the first external electrode is covered with the first insulating coating layer;

the portion of the multiple second internal electrode layers, which is adjacent to the second end surface at the respective ends of the multiple second internal electrode layers, is partially covered with the second external electrode; and

a remaining portion of each of the multiple second internal electrode layers not covered with the second external electrode is covered with the second insulating coating layer.

14. The multilayer ceramic electronic component according to claim 11, wherein the multiple internal electrode layers each include at least one metal selected from the group consisting of Ni, Cu, Ag, and Pd, or an alloy comprising the one metal.

15. The multilayer ceramic electronic component according to claim 11, wherein the laminated body has a cuboid or substantially cuboid shape and corners and ridges of the laminated body are rounded.

16. The multilayer ceramic electronic component according to claim 11, wherein

the first external electrode extends over each of the first end surface, the first principal surface, the second principal surface, the first side surface, and the second side surface of the laminated body;

and

the second external electrode extends over each of the second end surface, the first principal surface, the second principal surface, the first side surface, and the second side surface of the laminated body.

17. The multilayer ceramic electronic component according to claim 11, wherein the first external electrode and the second external electrode each include a base electrode layer, and a plated layer disposed on the base electrode layer.

18. The multilayer ceramic electronic component according to claim 17, wherein the base electrode layer at least one of a baked layer, a resin layer, and a thin film layer.

19. The multilayer ceramic electronic component according to claim 17, wherein the plated layer a two-layer structure an Ni plated layer and a Sn plated layer provided on the Ni plated layer.

20. The multilayer ceramic electronic component according to claim 11, wherein the multilayer ceramic electronic component is one of a capacitor and an inductor.