Capacitor having a plurality of minute internal electrode portions filled by a dielectric layer

Patent metadata

Field	Value
Publication number	US-9214277-B2
Application number	US-201313910314-A
Country	US
Kind code	B2
Filing date	Jun 5, 2013
Priority date	Jun 7, 2012
Publication date	Dec 15, 2015
Grant date	Dec 15, 2015

Abstract

A capacitor includes a dielectric layer, a first external electrode layer, a second external electrode layer, a first internal electrode portion, a second internal electrode portion, and a close contact portion. The dielectric layer includes a first surface, a second surface facing the first surface, and a plurality of through-holes communicating between the first surface and the second surface. The first internal electrode portion is provided on a first through-hole portion. The second internal electrode portion is provided on a second through-hole portion. The close contact portion brings at least one of the first external electrode layer and the second external electrode layer into close contact with the dielectric layer, the close contact portion being provided on a third through-hole portion, the third through-hole portion being the remaining portion of the plurality of through-holes.

First claim

What is claimed is:

1. A capacitor, comprising:
a dielectric layer including
a first surface,
a second surface facing the first surface, and
a plurality of through-holes communicating between the first surface and the second surface, the plurality of through-holes including a first plurality of through-hole portions, a second plurality of through-hole portions, and a third plurality of through-hole portions, the first surface and the second surface communicating with each other through the first plurality of through-hole portions, the second plurality of through-hole portions, and the third plurality of through-hole portions;
a first external electrode layer disposed on the first surface;
a second external electrode layer disposed on the second surface;
a plurality of first internal electrode portions provided in the first plurality of through-hole portions, one end of each of the first internal electrode portions being connected to the first external electrode layer, the other end of each of the first internal electrode portions being insulated from the second external electrode layer;
a plurality of second internal electrode portions provided in the second plurality of through-hole portions, one end of each of the second internal electrode portions being connected to the second external electrode layer, the other end of each of the second internal electrode portions being insulated from the first external electrode layer; and
a plurality of close contact portions bringing at least one of the first external electrode layer and the second external electrode layer into close contact with the dielectric layer, the plurality of close contact portions being provided in the third plurality of through-hole portions, the plurality of close contact portions including a plurality of resin material layers; wherein each of the plurality of resin material layers are connected to the first external electrode layer and the second external electrode layer, the plurality of resin material layers filling the third plurality of through-hole portions.

2. The capacitor according to claim 1 , wherein
the third plurality of through-hole portions is provided on the periphery of the dielectric layer.

3. The capacitor according to claim 1 , wherein
the plurality of close contact portions includes a plurality of metal material layers connected to any one of the first external electrode layer and the second external electrode layer, the plurality of metal material layers being arranged on the periphery of the dielectric layer.

4. The capacitor according to claim 1 , wherein
the dielectric layer includes a first area, a second area, and a third area;
wherein the first area includes the first plurality of through-hole portions and the second plurality of through-hole portions;
wherein the second area includes a part of the third plurality of through-hole portions, the second area being provided on an outer periphery side of the first area;
wherein the third area is provided between the first area and the second area, the third area including the remaining portions of the third plurality of through-hole portions;
wherein the plurality of resin material layers is provided on the third plurality of through-hole portions in the second area, the plurality of resin material layers being connected to the first external electrode layer and the second external electrode layer; and
wherein the plurality of the close contact portions includes a plurality of metal material layers provided on the third plurality of through-hole portions in the third area, the plurality of metal material layers being connected to any one of the first external electrode layer and the second external electrode layer.

Assignees

• Taiyo Yuden Kk

Inventors

• Masuda Hidetoshi
• Take Yoshinari

Classifications

• H01G4/232

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

• H01G4/302

  obtained by injection of metal in cavities formed in a ceramic body · CPC title

• H01G4/005 Primary

  Electrodes · CPC title

• H01G4/012 Primary

  Form of non-self-supporting electrodes · CPC title

• H01G9/048

  characterised by their structure (H01G11/22 takes precedence) · CPC title