Capacitor and method for manufacturing capacitor

A manufacturing method and capacitor technology, applied in the field of capacitors, can solve problems such as high raw material prices and restrictions on raw material production areas, and achieve the effect of preventing the diffusion of oxygen and preventing the deterioration of characteristics

Inactive Publication Date: 2019-01-04
TOKIN CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, tantalum is a rare metal, so the raw material price is high
In addition, the origin of raw materials is also limited, and there are certain problems from the viewpoint of stable material supply

Method used

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  • Capacitor and method for manufacturing capacitor
  • Capacitor and method for manufacturing capacitor
  • Capacitor and method for manufacturing capacitor

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Embodiment Construction

[0035] The present invention can be realized in various modifications and various forms, and as an example thereof, a specific embodiment shown in the drawings will be described in detail below. The illustrations and embodiments do not limit the present invention to the specific forms disclosed here, and all modifications, equivalents, and substitutions within the scope of the appended claims are included in the present invention. .

[0036] when referring to figure 1 , the capacitor 10 according to the embodiment of the present invention is a solid electrolytic capacitor having the anode structure 20 formed of a Zr alloy. The Zr alloy of the present embodiment is a binary alloy (ZrTi) in which Ti (titanium) is added to Zr (zirconium) as a main component. However, the present invention is not limited thereto. The Zr alloy of the present invention only needs to contain Zr and a metal element M capable of forming an oxide film in the electrolytic solution. The metal element ...

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Abstract

This capacitor is provided with: a positive electrode; an oxide layer; a dielectric layer; and a negative electrode. The oxide layer is positioned between the positive electrode and the dielectric layer. The positive electrode comprises a Zr alloy (ZrM, where M is a metallic element that can form an oxide film in an electrolytic solution). The oxide layer includes a ZrM composite oxide ((ZrM)OY, wherein Y<2) that has a hexagonal closest packing structure. The dielectric layer includes a ZrM composite oxide ((ZrM)O2).

Description

technical field [0001] The present invention relates to capacitors having anodes formed from Zr (zirconium) alloys. Background technique [0002] Valve metals such as Al (aluminum), Ta (tantalum), and Nb (niobium) can be used as a material for an anode of an electrolytic capacitor (capacitor). Generally, when an anode is made of these metal materials, a dielectric layer made of an anodic oxide film is formed on the metal material. A capacitor having such an anode is specifically disclosed in Non-Patent Document 1 and Patent Document 1, for example. [0003] In Non-Patent Document 1, two types of capacitors, an aluminum capacitor and a tantalum capacitor, are explained as representative examples of these capacitors. Among them, tantalum capacitors are characterized by smaller size and higher capacity than aluminum capacitors. Therefore, tantalum capacitors are widely used in electronic equipment and the like at present. However, tantalum is a rare metal, so the raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/052
CPCH01G9/052H01G4/10H01G4/1236C22C16/00C25D9/06C25D17/10H01G9/042H01G9/15
Inventor 幅崎浩树坂田幸治
Owner TOKIN CORP
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