Multilayer ceramic capacitor

Patent metadata

Field	Value
Publication number	US-9336945-B2
Application number	US-201414188044-A
Country	US
Kind code	B2
Filing date	Feb 24, 2014
Priority date	Oct 28, 2013
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

There is provided a multilayer ceramic capacitor including: a ceramic body having a plurality of dielectric layers stacked in a width direction; a plurality of first and second internal electrodes disposed in the ceramic body to be alternately exposed to the first and second end surfaces of the ceramic body, respectively, with the dielectric layers interposed therebetween; a plurality of first dummy electrodes; a plurality of second dummy electrodes; first and second external electrodes; first and second plating layers; and first and second terminal electrodes.

First claim

What is claimed is:

1. A multilayer ceramic capacitor comprising:
a ceramic body having a plurality of dielectric layers stacked in a width direction thereof and having first and second main surfaces opposing each other in a thickness direction thereof, first and second end surfaces opposing each other in a length direction thereof, and first and second side surfaces opposing each other in the width direction;
a plurality of first and second internal electrodes disposed in the ceramic body to be alternately exposed to the first and second end surfaces of the ceramic body, respectively, with the dielectric layers interposed therebetween;
a plurality of first dummy electrodes formed on the dielectric layers to be exposed through the first main surface and the first end surface of the ceramic body;
a plurality of second dummy electrodes formed on the dielectric layers to be exposed through the first main surface and the second end surface of the ceramic body;
first and second external electrodes formed on the first and second end surfaces of the ceramic body, respectively;
first and second plating layers formed on the first and second external electrodes, respectively; and
first and second terminal electrodes respectively formed on exposed portions of the first and second dummy electrodes, on the first main surface of the ceramic body to be connected to the first and second plating layers, respectively,
wherein the first and second external electrodes include inner external electrode layers in a state of non-contact with the first and second dummy electrodes and outer external electrode layers in contact with the first and second dummy electrodes, respectively.

2. A multilayer ceramic capacitor comprising:
a ceramic body having a plurality of dielectric layers stacked in a width direction thereof and having first and second main surfaces opposing each other in a thickness direction thereof, first and second end surfaces opposing each other in a length direction thereof, and first and second side surfaces opposing each other in the width direction;
a plurality of first and second internal electrodes disposed in the ceramic body to be alternately exposed to the first and second end surfaces of the ceramic body, respectively, with the dielectric layers interposed therebetween;
a plurality of first dummy electrodes formed on the dielectric layers to be exposed through the first main surface and the first end surface of the ceramic body;
a plurality of second dummy electrodes formed on the dielectric layers to be exposed through the first main surface and the second end surface of the ceramic body;
first and second base electrode layers formed on the first and second end surfaces of the ceramic body, respectively, to be connected to exposed portions of the first and second internal electrodes, respectively;
first and second conductive resin layers covering the first and second base electrode layers formed on the first and second end surfaces of the ceramic body, respectively, and connected to exposed portions of the first and second dummy electrodes, respectively;
first and second plating layers covering the first and second conductive resin layers, respectively; and
first and second terminal electrodes respectively formed on the exposed portions of the first and second dummy electrodes on the first main surface of the ceramic body to be connected to the first and second plating layers, respectively.

3. The multilayer ceramic capacitor of claim 1 , wherein the first and second internal electrodes include first and second capacitance parts accommodated in the ceramic body and first and second lead parts respectively protruding from central portions of one ends of the first and second capacitance parts to be exposed through the first and second end surfaces of the ceramic body, respectively.

4. The multilayer ceramic capacitor of claim 1 , wherein the first dummy electrodes are further formed on the dielectric layers to be exposed through the second main surface and the first end surface of the ceramic body, and the second dummy electrodes are further formed on the dielectric layers to be exposed through the second main surface and the second end surface of the ceramic body.

5. The multilayer ceramic capacitor of claim 1 , wherein the first and second base electrode layers are extended from the first and second end surfaces of the ceramic body to portions of the first and second side surfaces thereof, respectively.

6. The multilayer ceramic capacitor of claim 1 , wherein the first and second base electrode layers are formed using a conductive paste containing copper and glass.

7. The multilayer ceramic capacitor of claim 1 , wherein the first and second conductive resin layers contain one of a thermosetting resin, a conductive filler, and a metal particle.

8. The multilayer ceramic capacitor of claim 1 , wherein the first and second plating layers are formed by sequentially stacking a nickel (Ni) plating layer and a tin (Sn) plating layer on the first and second end surfaces of the ceramic body, respectively.

9. The multilayer ceramic capacitor of claim 1 , wherein the first and second terminal electrodes are formed by growing plating films on the exposed portions of the first and second dummy electrodes, respectively.

10. A multilayer ceramic capacitor comprising:
a ceramic body having a plurality of dielectric layers stacked in a width direction thereof and having first and second main surfaces opposing each other in a thickness direction thereof, first and second end surfaces opposing each other in a length direction thereof, and first and second side surfaces opposing each other in the width direction;
a plurality of first and second internal electrodes disposed in the ceramic body to be alternately exposed to the first and second end surfaces of the ceramic body, respectively, with the dielectric layers interposed therebetween;
a plurality of first dummy electrodes formed on the dielectric layers to be exposed through the first main surface of the ceramic body;
a plurality of second dummy electrodes formed on the dielectric layers to be exposed through the first main surface of the ceramic body and be spaced apart from the first dummy electrodes in the length direction;
first and second base electrode layers formed on the first and second end surfaces of the ceramic body, respectively, to be connected to exposed portions of the first and second internal electrodes, respectively;
first and second conductive resin layers covering the first and second base electrode layers formed on the first and second end surfaces of the ceramic body, respectively, and connected to exposed portions of the first and second dummy electrodes, respectively;
first and second plating layers covering the first and second conductive resin layers, respectively; and
first and second terminal electrodes respectively formed on the exposed portions of the first and second dummy electrodes, on the first main surface of the ceramic body to be connected to the first and second plating layers, respectively.

11. The multilayer ceramic capacitor of claim 10 , wherein the first and second internal electrodes include first and second capacitance parts accommodated in the ceramic body and first and second lead parts respectively protruding from central portions of one ends of the first and second capacitance parts to be exposed through the first and second end surfaces of the ceramic body, respectively.

12. The multilayer ceramic capacitor of claim 10 , wherein the first and second base electrode layers are formed to cover the entirety of the first and second end surfaces of the ceramic body, respectivel

Assignees

• Samsung Electro Mech

Inventors

• Park Min Cheol
• Park Heung Kil

Classifications

• H01G2/065

  for surface mounting, e.g. chip capacitors · CPC title

• H05K3/3442

  having edge contacts, e.g. leadless chip capacitors, chip carriers · CPC title

• H01G4/012 Primary

  Form of non-self-supporting electrodes · CPC title

• H05K2201/10015

  Non-printed capacitor · CPC title

• H01G4/30 Primary

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