Capacitor

Patent metadata

Field	Value
Publication number	US-10658111-B2
Application number	US-201815864534-A
Country	US
Kind code	B2
Filing date	Jan 8, 2018
Priority date	Aug 10, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

A capacitor having a conductive porous substrate with at least two electrostatic capacitance forming sections, each of the at least two electrostatic capacitance forming sections including a porous portion of the conductive porous substrate, a dielectric layer on the porous portion, and an upper electrode on the dielectric layer. The at least two electrostatic capacitance forming sections are electrically connected in series by the conductive porous substrate.

First claim

The invention claimed is:

1. A capacitor comprising:
a conductive porous substrate having at least two electrostatic capacitance forming sections, each of the at least two electrostatic capacitance forming sections including a porous portion of the conductive porous substrate, a dielectric layer on the porous portion, and an upper electrode on the dielectric layer, wherein
the at least two electrostatic capacitance forming sections are electrically connected in series by the conductive porous substrate,
the at least two electrostatic capacitance forming sections are adjacent to each other and are isolated by a groove, and
the conductive porous substrate includes, for each of the at least two electrostatic capacitance forming sections, a first porosity portion and a second porosity portion, the first porosity portion having a higher porosity than the second porosity portion.

2. The capacitor according to claim 1 , wherein all of the at least two electrostatic capacitance forming sections are on a first surface of the conductive porous substrate.

3. The capacitor according to claim 1 , wherein there are only two electrostatic capacitance forming sections in the capacitor.

4. The capacitor according to claim 1 , further comprising a terminal electrode directly connected to the conductive porous substrate.

5. The capacitor according to claim 4 , wherein
a first surface of the conductive porous substrate has a plurality of sections defined by a rectangular lattice,
each section includes one of (1) one electrostatic capacitance forming section of the at least two electrostatic capacitance forming sections and (2) the terminal electrode,
all sections adjacent to the section including the one electrostatic capacitance forming section of the at least two electrostatic capacitance forming sections include the terminal electrode, and
all sections adjacent to the section including the terminal electrode include the one electrostatic capacitance forming section of the at least two electrostatic capacitance forming sections.

6. The capacitor according to claim 5 , wherein the terminal electrode is not exposed on a surface of the capacitor.

7. The capacitor according to claim 1 , wherein each of the at least two electrostatic capacitance forming sections further include a terminal electrode on the upper electrode.

8. The capacitor according to claim 1 , wherein a porosity of the porous portion of the conductive porous substrate is from 20% to 90%.

9. The capacitor according to claim 1 , wherein a porosity of the porous portion of the conductive porous substrate is from 60% to 80%.

10. A capacitor comprising:
a conductive porous substrate having at least two electrostatic capacitance forming sections, each of the at least two electrostatic capacitance forming sections including a porous portion of the conductive porous substrate, a dielectric layer on the porous portion, and an upper electrode on the dielectric layer, wherein
the at least two electrostatic capacitance forming sections are electrically connected in series by the conductive porous substrate, and
wherein the conductive porous substrate includes, for each of the at least two electrostatic capacitance forming sections, a first porosity portion and a second porosity portion, the first porosity portion having a higher porosity than the second porosity portion.

Assignees

• Murata Manufacturing Co

Inventors

• Hattori Kazuo
• Inoue Noriyuki
• Saeki Hiromasa
• Aoki Kensuke
• Ito Ken

Classifications

• H01G9/045

  based on aluminium · CPC title

• H01G9/0425

  specially adapted for cathode · CPC title

• H01G4/38

  Multiple capacitors, i.e. structural combinations of fixed capacitors · CPC title

• H01G4/33

  Thin- or thick-film capacitors {(thin- or thick-film circuits; capacitors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof, multistep manufacturing processes therefor)} · CPC title

• H01G9/07

  Dielectric layers · CPC title