JPH0287612A - Manufacturing method of solid electrolytic capacitor with fuse and lead frame used therein - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a fuse-containing capacitor that can electrically connect the anode body of the solid electrolytic capacitor body to the anode terminal and the cathode layer to the cathode terminal via a fuse. The present invention relates to a method of manufacturing a solid electrolytic capacitor and a lead frame used therein.

<Prior Art> As shown in FIG. 5, the lead frame 12 used in the conventional manufacturing method of the solid electrolytic capacitor described above includes two strip-shaped metal plates 21 from opposite positions of the metal plates 21. An anode terminal 5 and a cathode terminal 7 protruding inward, respectively.
Some have multiple sets of.

An example of the conventional manufacturing method of the solid electrolytic capacitor mentioned above is shown in the fifth example.
This is shown in FIGS. 7 to 7. Note that Fig. 5(b) is similar to Fig. 5(a).
), and FIG. 6(b) is a sectional view taken along E-D in FIG. 6(a).
It is an E sectional view. As shown in FIGS. 5(a) and 5(b), the solid electrolytic capacitor body l is located between the anode terminal 5 and the cathode terminal 7, which are protruded from opposite positions of the metal lead frame 12. Place. Then, the anode body 6 and lead frame 12 of this solid electrolytic capacitor main body l
The anode terminal 5 is electrically connected to the anode terminal 5 by welding (FIGS. 5(a) and 5(b)). Next, one end of the fuse 22 and the cathode layer 8 of the solid electrolytic capacitor body 1 are electrically connected via a conductive adhesive such as silver paste or silver-copper paste or by soldering. Then, the other end of the fuse 22 and the cathode terminal 7 of the lead frame 12 are electrically connected via a conductive adhesive or by welding or the like. Furthermore, the entire outer surface of the solid electrolytic capacitor main body 1, the connection part between the anode body 6 and the anode terminal 5, and the connection part between the fuse 22, the cathode layer 8, and the cathode terminal 7 are integrally molded with an exterior part 23 (resin). do. Then, the anode terminal 5 and the cathode terminal 7 are cut along the dashed line at their respective base ends on the lead frame 12 side (FIGS. 6(a) and 6(b)).

In order to mount this solid electrolytic capacitor on a wiring board, etc., the base ends of the anode and cathode terminals 5, 7 are bent along the left and right sides of the exterior part 23, as shown in FIG. The sides are bent inward at the center along the lower surface of the exterior portion 23, and each terminal 5.7 is connected to a terminal portion of a wiring board.

<Problem to be Solved by the Invention> In the method for manufacturing a solid electrolytic capacitor using the lead frame 12 described above, after the anode body 6 of the solid electrolytic capacitor body 1 and the anode terminal 5 of the lead frame 12 are connected by welding, the fuse is When connecting one end of the fuse 22 to the cathode layer 8 of the solid electrolytic capacitor body 1 and when connecting the other end of the fuse 22 to the cathode terminal 7 of the lead frame 12, the solid electrolytic capacitor body 1 or the anode body 6 and the lead frame are connected. 1
Since it is supported only by the connection with the anode terminal 5 of No. 2,
The solid electrolytic capacitor body 1 moves easily, making it difficult to connect the fuse 22 to the cathode layer 8 and cathode terminal 7.

Therefore, there is a problem that a connection failure of the fuse 22 occurs. Further, there is also the problem that the connection work of the fuse 22 applies unreasonable force to the connection between the anode body 6 and the anode terminal 5, and this connection may come off.

The present invention has been made in view of the problems of the prior art, and its purpose is to connect the anode body 6 of the solid electrolytic capacitor main body l to the anode terminal 5 and the cathode layer 8 to the fuse. Manufacturing method for ensuring electrical connection to cathode terminal 7 via 22, and lead frame 2 used therein
4.

<Means for Solving the Problems> The first invention has been made in view of the above problems, and includes a solid electrolytic capacitor body that accommodates a cathode layer and an anode body, and band-shaped metal plates on both sides. a lead frame having a solid electrolytic capacitor body mounting portion coupled to a tip of one of the cathode terminal and anode terminal, the lead frame having a cathode terminal and an anode terminal respectively protruding inward from opposing positions; In the method for manufacturing a fuse-containing solid electrolytic capacitor using a fuse, the step of forming an insulating layer on the mounting part of the lead frame, and the step of forming the main body on the surface of the mounting part on which the insulating layer is provided, The method includes the steps of connecting an anode body to the anode terminal, and connecting the fuse to the cathode layer and the cathode terminal.

Similarly to the first invention, the second invention uses a solid electrolytic capacitor main body, a lead frame, and a fuse, and includes the steps of forming an insulating layer on the mounting portion of the lead frame, and the above-mentioned arrangement. and connecting the fuse to the cathode layer and the cathode terminal, and connecting the anode body to the anode terminal. be able to.

A third invention is a lead frame having the configuration described in relation to the first invention.

<Operation/Effect> According to the first invention, one end of the fuse is connected to the cathode layer while the solid electrolytic capacitor body is placed on the solid electrolytic capacitor body mounting portion and the anode body is welded to the anode terminal. ,
Since the other end of the fuse is connected to the cathode terminal, the solid electrolytic capacitor body does not move during this connection operation, making the connection operation easy and reliable. Also, during the process of connecting this fuse to the cathode layer and cathode terminal, no excessive force is applied to the connection between the anode body and the anode terminal.
This has the effect of preventing the connection between the anode body and the anode terminal from coming off. Furthermore, when connecting the anode body to the anode terminal, since the solid electrolytic capacitor main body is supported by the mounting part, the main body does not move during this connection work, making this connection easy.

The insulating layer of the mounting part insulates the solid electrolytic capacitor main body and the mounting part.1 For example, the capacitor body whose outer peripheral surface is formed as a cathode layer is connected to the mounting part which is connected to the anode terminal. When this happens, this cathode layer and anode terminal can be insulated.

According to the second invention, the fuse is connected to the cathode layer and the cathode terminal while the solid electrolytic capacitor body is coupled to the solid electrolytic capacitor body mounting part via the insulating layer, and then the anode body is connected to the anode terminal. When connecting, the main body does not move during these connection operations, making it easier to connect and ensuring reliable connection. Further, during the work of connecting the anode body to the anode terminal, no unreasonable force is applied to the connection between the fuse, the cathode layer, and the cathode terminal, so that the connection can be prevented from coming off. Also, if the anode body is connected to the anode terminal and then the fuse is connected to the cathode layer and the cathode terminal, these connections can be ensured, and the fuse can be connected to the cathode layer and the cathode terminal. Since no unreasonable force is applied to the connection between the anode body and the anode terminal during work, it is possible to prevent the connection from coming off. Note that the insulating layer of the mounting portion has the same function as the first invention.

Since the third invention is a lead frame used in connection with the first and second inventions, by using this lead frame, the solid electrolytic capacitor main body is supported on the mounting part so as not to move during the manufacturing process. Therefore, it is possible to reliably electrically connect the anode body to the anode terminal and the cathode layer to the cathode terminal via the fuse.

<Example> A first example of the present invention will be described with reference to FIGS. 1 to 3.

In the solid electrolytic capacitor of this embodiment, parts equivalent to those shown in the conventional example are indicated by the same reference numerals in the drawings, and detailed description thereof will be omitted. 1 to 3 are diagrams showing the manufacturing procedure of a solid electrolytic capacitor with a fuse. Figure 2(b) is a sectional view taken along line A-A in Figure 2(a), and Figure 3(b) is a cross-sectional view of Figure 3(a).
) is a BB sectional view. First, by a conventionally known method, a solid electrolytic capacitor main body l is manufactured, which has a rectangular parallelepiped outer shape, has a cathode N8 on its outer peripheral surface, and has an anode body 6 protruding from the center of one rectangular end surface in the central axis direction. .

Further, as shown in FIG. 2, a lead frame 24 in which two strip-shaped metal plates 21 are arranged in parallel is manufactured separately from the solid electrolytic capacitor main body 1. These two metal plates 2
1, an anode terminal 5 is provided on the lower edge of the metal plate 21 on the upper side of the drawing, protruding downward at right angles to the length direction of the metal plate 21. As shown in FIG. 2(b), this anode terminal 5 is provided with a solid electrolytic capacitor main body mounting portion 25 (hereinafter referred to as mounting portion 25) at its tip. This mounting portion 25 is formed of a metal plate having the same width as the anode terminal 5, and is bent at a right angle from the tip of the anode terminal 5 to the right side in the figure, and further bent at a right angle downward to terminate. . And the lower metal plate 21
A cathode terminal 7 is provided on its upper edge at a position opposite to the anode terminal 5 to protrude upward.

Note that 27 shown in the figure is a small hole. This small hole 27 is provided at the bent part between the tip of the anode terminal 5 and the mounting part 25, and the anode body 6 can be welded to the tip of the anode terminal 5 while straddling this small hole 27. This prevents the base end of the anode body 6 from being welded to the tip of the anode terminal 5.

In this embodiment, the mounting portion 25 is formed by bending a metal plate continuous from the tip of the anode terminal 5, but the mounting portion 25 may have another configuration. is placed between the tips of the anode and cathode terminals 5.7, coupled to the tips of the cathode terminal 7, and the mounting portion 25 is bent so as to be at a different height from the anode and cathode terminals 5.7. As shown in FIG.
A plurality of sets of the anode and cathode terminals 5.7 and the mounting portion 25 are provided on the metal plate 21.21.

Then, an insulating layer 26 is formed by applying an insulating material or pasting an insulating sheet on the left side surface of the mounting portion 25 of the lead frame 24 shown in FIG. 2(b) thus formed. Then, the solid electrolytic capacitor body 1 is placed on the outer surface of the insulating layer 26 of each placing portion 25. Then, the anode body 6 is placed across the small hole 27 and electrically connected to the anode terminal 5 by welding (FIGS. 2(a) and 2(b)).

Next, one end of the fuse 22 is electrically connected to the cathode terminal 7 by welding, soldering, or conductive adhesive, and the other end of the fuse 22 is connected to the cathode layer 8 by soldering or conductive adhesive. Connect electrically.

Further, the entire outer surface of the solid electrolytic capacitor main body l, the connection part between the anode body 6 and the anode terminal 5, the connection part between the fuse 22, the cathode layer 8 and the cathode terminal 7, and the mounting part 25 are integrated. The exterior part 23 (resin) is molded. Then, the anode terminal 5 and the cathode terminal 7 are cut along the dashed line at their respective base ends on the lead frame 24 side (Fig. 3(a)).
, (b)).

In order to mount this solid electrolytic capacitor on a wiring board or the like, each of the terminals 5 and 7 is bent as shown in FIG. 1, and is connected to a terminal portion of the wiring board.

According to the above-described procedure, the solid electrolytic capacitor main body 1 is supported by the mounting portion 25 so as not to move during the work of connecting the fuse 22 to the cathode layer 8 and the cathode terminal 7, so that this connection work is easy. Easy and reliable connection. In addition, since no excessive force is applied to the connection between the anode body 6 and the anode terminal 5 during this connection work, the anode body
The connection between the anode terminal 5 and the anode terminal 5 will not come off.

A second embodiment will be explained. As shown in FIG. 4(b), an insulating layer 26 is formed by applying an insulating material or pasting an insulating sheet on the left side surface of the mounting portion 25 of the lead frame 24. The solid electrolytic capacitor main body 1 is then bonded to the mounting portion 25 by adhering it to the surface of the insulating layer 26 of the mounting portion 25. Next, one end of the fuse 22 is connected to the cathode layer 8, and the other end of the fuse 22 is connected to the cathode terminal 7. After that, the anode body 6 is connected to the anode terminal 5. Or anode body 6
is connected to the anode terminal 5, and then the fuse 22 is connected to the cathode layer 8 and the cathode terminal 7.

According to the above-described procedure, when the fuse 22 is connected to the cathode layer 8 and the cathode terminal 7 and when the anode body 6 is welded to the anode terminal 5, the solid electrolytic capacitor main body 1 is already connected to the mounting part 25 and does not move. Therefore, connection work such as welding is easy to perform, and connections can be made reliably. And Fuse 2
2 to the cathode layer 8 and the cathode terminal 7, and then connect the anode body 6 to the anode terminal 5, when connecting the anode body 6 to the anode terminal 5, the fuse 22, the cathode layer 8, and the cathode terminal 7 Since no undue force is applied to the connection, this connection will not come off. Also, when connecting the anode body 6 to the anode terminal 5 and then connecting the fuse 22 to the cathode layer 8 and the cathode terminal 7, do not apply excessive force to the connection between the anode body 6 and the anode terminal 5. A fuse 22 can be connected to the cathode layer 8 and the cathode terminal 7.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a solid electrolytic capacitor manufactured by the method of the first embodiment of the present invention, and FIGS. 2(a) and (b)
) and FIGS. 3(a) and (b) are diagrams showing the manufacturing process of the solid electrolytic capacitor of the same example, and FIGS. 4(a) and (
b) is a diagram showing a part of the manufacturing process of the solid electrolytic capacitor of the second embodiment, FIGS. 5(a), (b), and FIG. 6(a).
), (b) are diagrams showing the manufacturing process of a conventional solid electrolytic capacitor, and FIG. 7 is a longitudinal cross-sectional view of a solid electrolytic capacitor manufactured by the conventional method. l...Solid electrolytic capacitor, 5...Anode terminal,
6... Anode body, 7... Cathode terminal, 8... Cathode layer, 21... Metal plate, 22... Fuse, 2
4... Lead frame, 25... Placement section. Patent applicant: Matsuo Electric Co., Ltd. Kusunoki 3 No. 1 Base 2 Figure

Claims (3)

[Claims] (1) A solid electrolytic capacitor body having a cathode layer and an anode body, and a cathode terminal and an anode terminal that respectively protrude inward from opposing positions of metal plates on both sides forming a band shape. A method for manufacturing a fused solid electrolytic capacitor using a fuse and a lead frame having a solid electrolytic capacitor body mounting part coupled to the tip of one of the terminals, the method comprising forming an insulating layer on the mounting part of the lead frame. connecting the anode body to the anode terminal while the main body is placed on the surface of the mounting section provided with the insulating layer; and connecting the fuse to the cathode layer and the cathode terminal. A method for manufacturing a fused solid electrolytic capacitor, comprising the steps of: (2) A method for manufacturing a fused solid electrolytic capacitor using the solid electrolytic capacitor main body, a lead frame, and a fuse according to claim (1), including the step of forming an insulating layer on the mounting portion of the lead frame. , comprising the steps of: bonding the main body to the surface of the mounting portion provided with the insulating layer; and connecting the fuse to the cathode layer and the cathode terminal, and connecting the anode body to the anode terminal. A method for manufacturing a solid electrolytic capacitor with a fuse. (3) A solid electrolytic capacitor body having a cathode terminal and an anode terminal protruding inwardly from opposite positions of the band-shaped metal plates on both sides, and a solid electrolytic capacitor body coupled to the tip of one of the cathode terminal and anode terminal. A lead frame having a mounting section.