Multilayer ceramic electronic component

Patent metadata

Field	Value
Publication number	US-10060852-B2
Application number	US-201514851323-A
Country	US
Kind code	B2
Filing date	Sep 11, 2015
Priority date	Mar 19, 2013
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A multilayer ceramic capacitor includes a laminated body including laminated ceramic layers, and first and second internal electrodes extending along interfaces between the ceramic layers. External electrodes are located on outer surfaces of the laminated body. Phosphor is disposed on portions of outer surfaces of the laminated body containing no external electrodes.

First claim

What is claimed is:

1. A multilayer ceramic electronic component comprising:
a laminated body including a plurality of ceramic layers laminated, and internal electrodes extending along interfaces between the plurality of ceramic layers; and
an external electrode on an outer surface of the laminated body; wherein
a phosphor is disposed on a portion of an outer surface of the laminated body on which the external electrode is not located; and
the phosphor projects from the outer surface of the laminated body.

2. The multilayer ceramic electronic component according to claim 1 , wherein the phosphor comprises at least one of an oxide, an oxynitride, and a nitride.

3. The multilayer ceramic electronic component according to claim 1 , wherein the plurality of ceramic layers are dielectric ceramic layers.

4. The multilayer ceramic electronic component according to claim 1 , wherein the phosphor comprises a perovskite-type compound.

5. The multilayer ceramic electronic component according to claim 4 , wherein the phosphor contains, as a main constituent, a perovskite-type compound represented by ABO 3 , and contains R as an additive component, A contains at least one of Ba, Sr, and Ca, B contains at least one of Ti, Zr, Hf, Al, and Sn, and O represents oxygen; and
R contains at least one of Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Y.

6. The multilayer ceramic electronic component according to claim 4 , wherein the internal electrodes contain a non-precious metal.

7. The multilayer ceramic electronic component according to claim 4 , wherein the external electrode contains a non-precious metal.

8. The multilayer ceramic electronic component according to claim 1 , wherein the multilayer ceramic electronic component is a multilayer ceramic electronic capacitor.

9. The multilayer ceramic electronic component according to claim 1 , wherein the external electrode wraps around four side surfaces from both end surfaces in a length direction of the laminated body.

10. The multilayer ceramic electronic component according to claim 1 , wherein the phosphor has a shape of one of a circle, a rectangle and a star.

11. The multilayer ceramic electronic component according to claim 1 , wherein the external electrode is a first external electrode, a second external electrode is provided on the outer surface of the laminated body, and on both sides in a laminating direction of the internal electrodes, the phosphor is provided on entire surfaces of the laminated body between the first external electrode and the second external electrode.

12. The multilayer ceramic electronic component according to claim 1 , wherein the phosphor is provided on side surfaces of the laminated body in a direction perpendicular or substantially perpendicular to a laminating direction of the internal electrodes.

13. The multilayer ceramic electronic component according to claim 1 , wherein the phosphor includes at least one of Y 2 O 3 :Mn, Ga 2 O 3 :Cr, CaGa 2 O 4 :Mn, Y 2 GeO 5 :Mn, Zn 2 SiO 4 :Mn, ZnGa 2 O 4 :Mn, Zn 2 Si 0.6 Ge 0.4 O 4 :Mn, Zn(Ga 0.7 Al 0.3 )O 4 :Mn, P 2 O 3 ) 0.6 —(GeO 2 ) 0.4 ):Mn, ((Ga 2 O 3 ) 0.7 —(Al 2 O 3 ) 0.3 ):Mn, CaAlSiN 3 :Eu, Sr 3 Si 13 Al 3 O 2 N 21 :Eu, α-SiAION:Eu, and β-SiAION:Eu.

14. A method of determining an orientation of an electronic component, the method comprising the steps of:
providing the multilayer ceramic electronic component according to claim 1 ;
irradiating a surface of the multilayer ceramic electronic component with light from a light source;
determining whether the surface of the multilayer ceramic electronic component irradiated with light from the light source contains the phosphor; and
determining an orientation of the internal electrodes based on a result of the step of determining whether the surface of the multilayer ceramic electronic component irradiated with light from the light source contains the phosphor.

15. The method according to claim 14 , further comprising the step of aligning the multilayer ceramic electronic component with respect to a mounting surface based on a result of the step of determining the orientation of the internal electrodes.

16. The method according to claim 14 , further comprising the step of aligning and mounting the multilayer ceramic electronic component on a circuit board based on a result of the step of determining the orientation of the internal electrodes.

17. The method according to claim 14 , wherein the light from the light source includes ultraviolet rays.

18. The method according to claim 14 , wherein the phosphor is disposed on side surfaces of the laminated body in a laminating direction of the internal electrodes.

19. The multilayer ceramic electronic component according to claim 1 , wherein the phosphor covers only a portion of the outer surface of the laminated body on which the external electrode is not located.

Assignees

• Murata Manufacturing Co

Inventors

• Shimada Kohei

Classifications

• G01N21/8422

  Investigating thin films, e.g. matrix isolation method · CPC title

• H01G4/236

  leading through the housing, i.e. lead-through · CPC title

• G01N2021/8438

  Mutilayers · CPC title

• H01G4/224

  Housing; Encapsulation · CPC title

• H01G4/12

  Ceramic dielectrics {(H01G4/085 takes precedence)} · CPC title