Multilayer ceramic capacitor

Patent metadata

Field	Value
Publication number	US-2017250027-A1
Application number	US-201715438613-A
Country	US
Kind code	A1
Filing date	Feb 21, 2017
Priority date	Feb 26, 2016
Publication date	Aug 31, 2017
Grant date	—

Abstract

In an embodiment, a multilayer ceramic capacitor 10 is formed in such a way that a first face f 1 of a capacitor body 11 has a concave shape and a first part 12 a of a first external electrode 12 contacts the concave-shaped first face f 1, and that a second face f 2 of the capacitor body 11 has a concave shape and a first part 13 a of a second external electrode 13 contacts the concave-shaped second face f 2.

First claim

We/I claim:

1 . A multilayer ceramic capacitor, comprising:
(1) a capacitor body having a first face and a second face that are facing each other in a length direction, a third face and a fourth face that are facing each other in a width direction, and a fifth face and a sixth face that are facing each other in a height direction, as well as a built-in capacitive part constituted by multiple first internal electrode layers and multiple second internal electrode layers stacked alternately with dielectric layers in between; (2) a first external electrode having a first part along the first face, and a second part along the fifth face, of the capacitor body, where ends of the multiple first internal electrode layers are connected to the first part, respectively; and (3) a second external electrode having a first part along the second face, and a second part along the fifth face, of the capacitor body, where ends of the multiple second internal electrode layers are connected to the first part, respectively; wherein the first face of the capacitor body has a concave shape and the first part of the first external electrode contacts the first face of the capacitor body; and wherein while the second face of the capacitor body has a concave shape and the first part of the second external electrode contacts the second face of the capacitor body.

2 . A multilayer ceramic capacitor according to claim 1 , wherein a thickness of the first part of the first external electrode is greater than a maximum depth of the concave-shaped first face of the capacitor body, and a thickness of the first part of the second external electrode is greater than a maximum depth of the concave-shaped second face of the capacitor body.

3 . A multilayer ceramic capacitor according to claim 1 , wherein the maximum length-direction dimension Dmax and minimum length-direction dimension Dmin satisfy a condition “0.90≦Dmin/Dmax≦0.98,” where Dmax represents a maximum length-direction dimension between the concave-shaped first face and concave-shaped second face of the capacitor body, and Dmin represents a minimum length-direction dimension between the concave-shaped first face and concave-shaped second face of the capacitor body.

4 . A multilayer ceramic capacitor according to claim 2 , wherein the maximum length-direction dimension Dmax and minimum length-direction dimension Dmin satisfy a condition “0.90≦Dmin/Dmax≦0.98,” where Dmax represents a maximum length-direction dimension between the concave-shaped first face and concave-shaped second face of the capacitor body, and Dmin represents a minimum length-direction dimension between the concave-shaped first face and concave-shaped second face of the capacitor body.

5 . A multilayer ceramic capacitor according to claim 1 , wherein the first face of the capacitor body is spherically concaved toward its center, and the second face of the capacitor body is spherically concaved toward its center.

6 . A multilayer ceramic capacitor according to claim 1 , wherein the first part of the first external electrode entirely contacts the first face of the capacitor body, and the first part of the second external electrode entirely contacts the second face of the capacitor body.

Assignees

• Taiyo Yuden Kk

Inventors

• Kowase Yusuke

Classifications

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• H01G4/30 Primary

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

• H01G4/248

  the terminals embracing or surrounding the capacitive element, e.g. caps (H01G4/252 takes precedence) · CPC title

• H01G4/232 Primary

  electrically connecting two or more layers of a stacked or rolled capacitor · CPC title

• H01G4/12

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