Capacitor

Patent metadata

Field	Value
Publication number	US-2018358178-A1
Application number	US-201816106497-A
Country	US
Kind code	A1
Filing date	Aug 21, 2018
Priority date	Feb 23, 2016
Publication date	Dec 13, 2018
Grant date	—

Abstract

A capacitor including a conductive porous base material having a plurality of pores, a dielectric layer on the conductive porous base material, an upper electrode on the dielectric layer, and an insulating material that extends into the plurality of pores.

First claim

1 . A capacitor comprising:
a conductive porous base material having a porous portion with a plurality of pores; a dielectric layer on the conductive porous base material and extending into the plurality of pores; an upper electrode on the dielectric layer; and an insulating material on the upper electrode and extending into at least some of the plurality of pores.

2 . The capacitor according to claim 1 , wherein the insulating material is one of a resin material and an insulating inorganic material.

3 . The capacitor according to claim 1 , wherein the insulating material is selected from the group of epoxy resin, phenol resin, polyimide resin, silicone resin, silane crosslinkable resin, Al 2 O 3 , SiO 2 , and SiN.

4 . The capacitor according to claim 1 , wherein at least some of the plurality of pores are filled with the insulating material.

5 . The capacitor according to claim 4 , wherein the insulating material is one of an epoxy resin and a phenolic resin.

6 . The capacitor according to claim 4 , wherein the insulating material is a silicon-containing material.

7 . The capacitor according to claim 4 , wherein a filling ratio of the insulating material is 50% to 100% by volume with respect to all of the plurality of pores of the porous portion.

8 . The capacitor according to claim 1 , wherein the insulating material is in the form of an insulating layer that covers the upper electrode in the plurality of pores.

9 . The capacitor according to claim 8 , wherein the insulating layer is one of Al 2 O 3 and SiO 2 .

10 . The capacitor according to claim 8 , further comprising a filling material filling at least some of the plurality of pores.

11 . The capacitor according to claim 8 , wherein the filling material is one of an epoxy resin and a phenolic resin.

12 . The capacitor according to claim 8 , wherein the filling material is a silicon-containing material.

13 . The capacitor according to claim 8 , wherein a filling ratio of the filling material is 50% to 100% by volume with respect to all of the plurality of pores of the porous portion.

14 . The capacitor according to claim 1 , wherein a void ratio of the porous portion is 20% to 90%.

15 . The capacitor according to claim 14 , further comprising a low void ratio portion surrounding the porous portion, the low void ratio portion having a lower void ratio than that of the porous portion.

16 . The capacitor according to claim 1 , wherein the insulating material has a specific resistance of 1×10 12 Ω·cm or more.

17 . The capacitor according to claim 1 , wherein the insulating material has a specific resistance of 1×10 14 Ω·cm or more.

Assignees

• Murata Manufacturing Co

Inventors

• Saeki Hiromasa

Classifications

• H01G4/14

  Organic dielectrics · CPC title

• H01G4/12 Primary

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

• H01G4/005

  Electrodes · CPC title

• H01G9/032

  Inorganic semiconducting electrolytes, e.g. MnO2 · CPC title

• H01G9/055

  Etched foil electrodes · CPC title