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Solid electrolytic capacitor

A technology of solid electrolysis and capacitors, which is applied in the direction of solid electrolytic capacitors, electrolytic capacitors, capacitors, etc., can solve the problem that the dielectric layer 103 is prone to cracks, and achieve the effect of reducing leakage current.

Active Publication Date: 2010-10-06
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the dielectric layer 103 near the portion where the anode 101 and the anode lead 102 are bonded is easily affected by the stress transmitted from the anode lead 102 during the molding process, and defects such as cracks are likely to occur in the dielectric layer 103.

Method used

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  • Solid electrolytic capacitor
  • Solid electrolytic capacitor
  • Solid electrolytic capacitor

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no. 1 approach

[0036] figure 1 It is a schematic cross-sectional view for explaining the inside of the solid electrolytic capacitor of this embodiment.

[0037] The solid electrolytic capacitor 20 of the present embodiment has a rectangular parallelepiped shape, basically, as figure 1 As shown, it includes a capacitor element 6, an anode terminal 7, a cathode terminal 9, a resin package 11, and a resin layer 10 composed of a first resin layer 10a and a second resin layer 10b, which will be described in sequence below.

[0038] The capacitor element 6 includes: an anode 1 formed of a valve metal; an anode lead 2 provided in such a manner that one end 2a is combined with the anode 1 and the other end 2b protrudes; a dielectric layer 3 formed by anodizing the anode 1; an electrolyte layer 4 covering the dielectric layer 3 ; and a cathode layer 5 covering the electrolyte layer 4 .

[0039] The anode 1 is made of a porous body formed by molding and sintering a large number of metal particles ...

no. 2 approach

[0071] Next, the solid electrolytic capacitor 21 of the second embodiment will be described below. In addition, the formation of the resin layer 10 which is a point different from the said 1st Embodiment is mainly demonstrated below.

[0072] Figure 6 It is a sectional view for schematically explaining the inside of the solid electrolytic capacitor 21 of this embodiment. In this embodiment, the exposed portion 40 , the other end portion 2 b of the anode lead, and the connection portion α are covered with the resin layer 10 .

[0073] As shown in the figure, the first resin layer 10 a is formed so as to cover the connecting portion α and to cover the entire surface of the exposed portion 40 along the anode lead 2 . The second resin layer 10b is formed so as to cover the first resin layer 10a, completely cover the surface 50 of the capacitor element, and extend over a part of the surface other than the surface 50 of the capacitor element.

[0074] Such a structure can also a...

no. 3 approach

[0077] Next, the solid electrolytic capacitor 22 of the third embodiment will be described below. In addition, the formation of the resin layer 10 which is a point different from the said 1st Embodiment is mainly demonstrated below.

[0078] Figure 7 It is a sectional view for schematically explaining the inside of the solid electrolytic capacitor 22 of this embodiment.

[0079] As shown in the figure, the first resin layer 10a is formed along the inside of the exposed portion 40 and a part of the other end portion 2b of the anode lead, and the first resin layer 10a is not formed at the connection portion α. In addition, the second resin layer 10 b is formed to cover the connecting portion α and substantially the entire surface of the exposed portion 40 .

[0080] With such a configuration, in the present embodiment, a part of the exposed portion 40 is covered with the first resin layer 10a which is softer than the second resin layer 10b. Therefore, the first resin layer 1...

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Abstract

A solid electrolytic capacitor includes at least one capacitor element in which the other end of an anode lead extends beyond an exposed portion of an electrolyte layer exposed from a cathode layer. The solid electrolytic capacitor further includes: an anode terminal connected to the other end of the anode lead, a cathode terminal connected to the cathode layer, a resin layer and a resin outer package covering the capacitor element and the resin layer. The resin layer covering the exposed portion of the electrolyte layer, the other end of the anode lead, and a connecting part between the other end of the anode lead and the anode terminal. The resin layer includes a first resin layer covering the exposed portion and a second resin layer covering the first resin layer, the first resin layerbeing softer than the second resin layer.

Description

technical field [0001] The present invention relates to a solid electrolytic capacitor having a resin package. Background technique [0002] The cross-sectional structure of the existing solid electrolytic capacitor is as follows Figure 17 shown. [0003] In the prior art, as shown in the figure, a solid electrolytic capacitor 120 has a capacitor element 106, and the capacitor element 106 includes: an anode 101 formed of a valve metal; An anode lead 102 provided in an out-of-the-way manner; a dielectric layer 103 formed by anodizing the anode 101; an electrolyte layer 104 formed on the dielectric layer 103; and a cathode layer 105 formed on the electrolyte layer 104. The anode 101 and the anode lead 102 are formed by embedding the anode lead 102 in a powder body made of a valve metal so that the other end 102b protrudes, and are integrated by sintering. [0004] Then, an anode terminal 107 is attached to the other end portion 102 b of the anode lead 102 , and a cathode te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/15H01G9/04H01G9/08H01G9/004H01G9/14
CPCH01G9/08H01G9/15H01G9/012
Inventor 梅本卓史林伸彦
Owner SANYO ELECTRIC CO LTD