Ceramic electronic component

Patent metadata

Field	Value
Publication number	US-9959975-B2
Application number	US-201514805546-A
Country	US
Kind code	B2
Filing date	Jul 22, 2015
Priority date	Jul 28, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A ceramic electronic component that includes a ceramic element, and a coating film and external electrodes on a surface of the ceramic element. The coating film includes cationic elements from a constituent element of the ceramic element, which are ionized and deposited from the ceramic element, and a resin. The surface of the coating film is recessed relative to a surface of wrapping parts of the external electrodes on the surface of the ceramic element.

First claim

What is claimed is:

1. A ceramic electronic component comprising:
a ceramic element;
a coating film on a surface of the ceramic element; and
an external electrode on an end of the ceramic element,
wherein the coating film includes a resin, and a cationic element that is a constituent element of the ceramic element, and the cationic element is an element that was eluted from the ceramic element, and
a surface of the coating film is recessed relative to a surface of a wrapping part of the external electrode, the wrapping part being located on the surface of the ceramic element.

2. The ceramic electronic component according to claim 1 , wherein the wrapping part of the external electrode is in direct contact with the surface of the ceramic element.

3. The ceramic electronic component according to claim 1 , wherein the surface of the ceramic element includes a recess and the coating film is provided in the recess.

4. The ceramic electronic component according to claim 3 , wherein the wrapping part of the external electrode is not in the recess.

5. The ceramic electronic component according to claim 3 , wherein the recess is on a side surface of the ceramic element.

6. The ceramic electronic component according to claim 3 , wherein the recess is on four side surfaces of the ceramic element, the surface being one of the four side surfaces.

7. The ceramic electronic component according to claim 1 , wherein the surface is a side surface of the ceramic element.

8. The ceramic electronic component according to claim 1 , wherein the coating film is on four side surfaces of the ceramic element, the surface being one of the four side surfaces.

9. The ceramic electronic component according to claim 1 , wherein the constituent element of the ceramic element includes at least one of Ba, Ti, Ca, Zr, Fe, Ni, Cu, Zn, Mn, Co, Al, and Si.

10. The ceramic electronic component according to claim 1 , wherein the resin has a thermal decomposition temperature of 240° C. or higher.

11. The ceramic electronic component according to claim 1 , wherein the resin comprises at least one of an epoxy resin, a polyimide resin, a silicone resin, a polyamideimide resin, a polyetheretherketone resin, and a fluorine-containing resin.

12. The ceramic electronic component according to claim 1 , wherein the coating film contains cross-linked resin components.

13. The ceramic electronic component according to claim 1 , further comprising a plated film on the external electrode.

14. The ceramic electronic component according to claim 1 , wherein a thickness of the coating film is smaller than a thickness of the wrapping part of the external electrode.

Assignees

• Murata Manufacturing Co

Inventors

• Inoue Mitsunori
• Okutomi Yoshihito
• Mori Tomohiko

Classifications

• H01G4/30 Primary

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

• H01G4/1209

  characterised by the ceramic dielectric material (H01G4/1272, H01G4/1281 take precedence) · CPC title

• H01C7/18

  comprising a plurality of layers stacked between terminals · CPC title

• H01C7/041

  formed with two or more layers · CPC title

• H01G4/224

  Housing; Encapsulation · CPC title