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Solid electrolytic capacitor and manufacturing method thereof

A technology of solid electrolysis and solid electrolyte layer, applied in the direction of solid electrolytic capacitors, electrolytic capacitor manufacturing, electrolytic capacitors, etc., to achieve high withstand voltage characteristics, ensure charge and discharge performance, and prevent deterioration of withstand voltage characteristics

Active Publication Date: 2017-09-19
NIPPON CHIMI CON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Like the anode foil, the cathode foil is also made of valve metal such as aluminum, but only the surface is etched

Method used

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  • Solid electrolytic capacitor and manufacturing method thereof
  • Solid electrolytic capacitor and manufacturing method thereof
  • Solid electrolytic capacitor and manufacturing method thereof

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Embodiment

[0046] Next, the present invention will be described in more detail based on Examples and Comparative Examples manufactured as follows.

[0047] First, the anode foil and the cathode foil with the oxide film layer formed on the surface were connected to the electrode lead-out member, and the two electrode foils were wound through a separator to form a capacitor element with an element shape of 6.3φ×6.1L. Next, the capacitor element was immersed in an aqueous solution of ammonium dihydrogen phosphate for 40 minutes to perform repair chemical conversion. Then, the conductive polymer compound dispersion obtained by dispersing fine particles of PEDOT and polystyrenesulfonic acid in an aqueous solution was immersed, and the capacitor element was pulled up and dried at about 150°C. Furthermore, the immersion-drying in which the capacitor element is immersed in the conductive polymer compound dispersion is repeated several times to form a conductive polymer layer made of a conductive...

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Abstract

The present invention provides a solid electrolytic capacitor with high withstand voltage capable of preventing degradation of withstand voltage characteristics caused by lead-free reflow soldering and the like, and a method for manufacturing the same. A capacitor element obtained by winding an anode electrode foil and a cathode electrode foil through a separator is impregnated with a dispersion of particles or powder of a conductive polymer and a solvent to form a solid electrolyte layer made of a conductive polymer, and the ions A solid electrolytic capacitor is made by filling a void in the capacitor element forming the solid electrolyte layer with a conductive material, the ion conductive material includes a mixed solvent and a solute, and the mixed solvent includes ethylene glycol and γ-butyrolactone, The solute is selected from at least one ammonium salt, quaternary ammonium salt, quaternized amidine salt and amine salt of organic acid, inorganic acid and composite compound of organic acid and inorganic acid.

Description

technical field [0001] The present invention relates to a solid electrolytic capacitor and a manufacturing method thereof, in particular to a solid electrolytic capacitor with good withstand voltage characteristics and a manufacturing method thereof. Background technique [0002] An electrolytic capacitor using a valve-action metal such as tantalum or aluminum can be obtained in a compact size by setting the valve-action metal as the anode-side counter electrode in the shape of a sintered body or etched foil to expand the dielectric surface. Large capacity and therefore generally widely used. In particular, solid electrolytic capacitors that use solid electrolytes in the electrolyte are not only small, large-capacity, and low equivalent series resistance, but also have the characteristics of being easy to chip and suitable for surface mounting. , Low cost is indispensable. [0003] Such a solid electrolytic capacitor generally has a structure in which an anode foil and a c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/028H01G9/035
CPCH01G9/0036H01G9/022H01G9/028H01G9/035H01G9/032H01G9/151
Inventor 小关良弥黑田宏一川上淳一坂仓正郎
Owner NIPPON CHIMI CON CORP
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