Capacitor and manufacturing method therefor

A manufacturing method and capacitor technology, applied in the direction of electrolytic capacitor manufacturing, capacitors, electrolytic capacitors, etc., can solve problems such as damage to the low height of capacitors, and achieve the effects of improving configuration accuracy, improving bending accuracy, and preventing back-bending

Inactive Publication Date: 2015-09-16
NIPPON CHIMI CON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, in a structure with a seat plate or a terminal plate, the low height of the capacitor is impaired

Method used

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  • Capacitor and manufacturing method therefor
  • Capacitor and manufacturing method therefor
  • Capacitor and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0037] figure 1 A of A shows a part of the capacitor of the first embodiment. figure 1 The structure shown by A is an example, and this invention is not limited to this structure.

[0038] The capacitor 2 is, for example, a solid electrolytic capacitor and is an example of the capacitor of the present invention.

[0039] For this capacitor 2, for example, a capacitor element 4 wound into a cylindrical shape is used. In this capacitor element 4 , as an example, an anode-side electrode foil, a first separator, a cathode-side electrode foil, and a second separator are laminated, wound into a cylindrical shape, and then impregnated with an electrolyte. The electrode foil on the anode side of the capacitor element 4 is connected to an anode-side lead terminal, and the electrode foil on the cathode side is connected to a cathode-side lead terminal. These lead terminals are led out from the element end face 6 of the capacitor element 4 . The illustrated lead terminal 8 may be e...

no. 2 Embodiment approach

[0051] figure 2 A in the figure shows the capacitor 2 of the second embodiment. exist figure 2 of A, pair with figure 1 The same parts of A are given the same reference numerals.

[0052] In the first embodiment, the stretching portion 12 is rod-shaped with the same diameter, whereas in the second embodiment, it has a hemispherical curved portion. Therefore, the level difference part 18-1 is formed with a curved surface.

[0053] According to this structure, on the lead terminal 8, since the step portion 18-1 does not have a corner but a curved surface, as shown in FIG. figure 2 As shown in B, the bent portion 20 is formed by bending the lead terminal 8 with the corner portion serving as the boundary portion between the stepped portion 18 - 1 and the notch 14 as the bending starting point. During this bending, the stepped portion 18-1 is deformed along with the formation of the bent portion 20, thereby avoiding the stepped portion 18-2 and avoiding the interference of...

no. 3 Embodiment approach

[0061] image 3 A shows a cross section of a solid electrolytic capacitor. image 3 The structure shown by A is an example, and this invention is not limited to this structure.

[0062] Conventionally, in the lead terminal, the length of the stretched part generated during the flattening process was different, so even if it was bent along the outer surface of the resin layer, the length of the stretched part would not be parallel to the outer surface of the resin layer. , there may be deviations in the height of the capacitor.

[0063] In addition, when the lead terminal is flattened in order to maintain the stability of the substrate layout, the desired portion is flattened. There is a stretch between them. The boundary between the stretched portion and the flat surface becomes the bending position. Due to the difference in the length of the stretched part, there will also be deviations in the bending position. When the stretched portion is long and the position away fro...

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PUM

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Abstract

A capacitor (2) in which a capacitor element (4) to which a lead terminal (8) is connected is covered by a resin. Said lead terminal, which extends from a resin layer (10) that covers the capacitor element, is provided with the following: a clearance section (stretch section (12)) that is exposed from the outer surface of the resin layer; a thin section (notch (14)); and step sections (18-1, 18-2) that form the boundaries between the clearance section and the thin section. The thin section is bent towards the step sections such that the lead terminal is positioned on the resin-layer side, the step sections overlap the thin section, and the thin section is positioned so as to surround the clearance section. This improves the bending precision of the lead terminal.

Description

technical field [0001] The present invention relates to a capacitor such as a solid electrolytic capacitor whose exterior parts are formed by resin molding and a method for manufacturing the same. Background technique [0002] In a capacitor externally packaged by resin molding, the lead terminals of the capacitor element are drawn out from the resin layer. The lead terminals are bent along the resin layer and processed into terminals for surface bonding. In such a capacitor, it is required to suppress height reduction. In a capacitor with reduced height, the height on the mounting substrate can be reduced, contributing to the miniaturization and weight reduction of mounted devices. [0003] Regarding such a capacitor, it is known to mount a base plate on the side where the lead terminal is drawn out of the capacitor, and to bend the lead terminals on the base plate (for example, Patent Document 1). Furthermore, it is known to mold a capacitor element with an insulating r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/012H01G9/10H01G9/15H01G2/06
CPCH01G2/065H01G9/012H01G9/15H01G9/10Y10T29/42H01G9/0029H01G9/08
Inventor 原岛丰猫塚浩
Owner NIPPON CHIMI CON CORP
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