JPH07105314B2 - Manufacturing method of chip type solid electrolytic capacitor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a chip type solid electrolytic capacitor, and more particularly to a manufacturing method in a lead terminal drawing step.

[0002]

2. Description of the Related Art In a conventional method for manufacturing a chip-type solid electrolytic capacitor, as shown in FIG. 2, when a solid electrolytic capacitor element is assembled, one long hoop-shaped material 2 is used.
2 was supplied, an unnecessary portion was punched out from the one hoop-shaped material to leave a terminal piece, and the terminal element was used to assemble the capacitor element 21 (JP-A-3-157914).

In the case of this type of manufacturing method, a system for supplying the processed hoop material and only assembling it, and a system for supplying the hoop material that has been processed up to the middle and performing the final processing within the assembly process It can be classified into two types of manufacturing systems, a manufacturing system and a manufacturing system.

There is also provided an assembly system in which a frame-shaped material is sequentially and continuously supplied to handle it as a pseudo hoop material.

[0005]

In the conventional manufacturing method, in the case of a system in which the processed hoop material is supplied and assembled as it is, the hoop material itself has a high added value and the cost of the hoop material in the manufacturing is high. Ratio is high. Further, when the hoop material is processed in the assembly system, particularly in the case of the conventional example shown in FIG. 2, the terminal piece is punched from one piece of the hoop material 22, so the punched part is wasted. However, in general, when the manufacturing cost is calculated, the material cost of the wasted part is included, and thus the ratio of the hoop material in the manufacturing cost is high.

Particularly in the case of a tantalum solid electrolytic capacitor, the hoop material occupies about 5 to 8%, which greatly affects the cost.

Further, in the process of punching and forming in block units, the work deformation and strain of the material have a great influence on warp, twist, and dimensional tolerance because the hoop material used is a long one. There is a problem.

An object of the present invention is to provide a method of manufacturing a chip type solid electrolytic capacitor which minimizes the cost of materials used and minimizes distortion in processing.

[0009]

In order to achieve the above object, a laminated solid electrolytic capacitor according to the present invention has a step of assembling a capacitor element, and a terminal member is joined to a terminal of the capacitor element to form a capacitor element. In the method for manufacturing a chip type solid electrolytic capacitor, the terminal member comprises two strip-shaped cathode terminal members and anode terminal members which are respectively bonded to the cathode terminal and the anode terminal of the capacitor element. The hoop-shaped material is used for these members, and the assembly process of the capacitor element includes two strip plate-shaped members for the cathode terminal and the member for the anode terminal, The material is supplied with a space between the terminal and the anode terminal, and the cathode terminal and the anode terminal are joined to the cathode terminal member and the anode terminal member, respectively.

Further, when the anode terminal member and the cathode terminal member are separately supplied by using a hoop-shaped material, each member has a step of performing different processing, and the step is supplied to the subsequent assembling steps. Is.

When the capacitor element is incorporated in the hoop-shaped material, a tie bar member is provided so as to be suspended between the anode terminal member and the cathode terminal member.

[0012]

The punching process is not performed on the hoop-shaped member, and only the bending process is performed. Therefore, there is no waste of the punching process, and the material can be effectively used. Further, since the materials to be processed are individually separated, the processing strains do not affect each other.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.

In FIG. 1, this embodiment is directed to a chip type tantalum solid electrolytic capacitor, and as its capacitor element 1, a cathode terminal 5a has a cylindrical shape and an anode terminal 5b is a cathode terminal 5a. A shaft having a smaller diameter is used. The anode terminal 5b and the cathode terminal 5a are arranged at both ends in the length direction.

In FIG. 1, two hoop-shaped cathode terminal members 3 having a necessary width dimension to be connected to the cathode terminal 5a and the anode terminal 5b and an anode terminal member 4 are arranged in parallel and molded. Send to the process.

In the molding step, only the fed cathode terminal member 3 is set in the molding dies 7 and 8 and the trapezoidal bent portion 3a bent downward is formed into the length of the cathode terminal member 3. Direction to the desired pitch.

On the other hand, the anode terminal member 4 is directly sent to the assembly process without being processed. In this case, the two hoop-shaped cathode terminal members 3 and the anode terminal member 4 are the same in a state where the bent portion 3a of the cathode terminal member 3 is arranged below the height position of the anode terminal member 4. Hold it in parallel at the height position and feed it toward the assembly process.

In the assembling process, the capacitor element 1 is placed across the two fed hoop-shaped cathode terminal members 3 and anode terminal members 4. Then, the cylindrical cathode terminal 5a of the capacitor element 1 is connected to the concave bent portion 3 of the anode terminal member 3.
It is put into a and the shaft-shaped anode terminal 5b is placed on the anode terminal member 4. Further, the cylindrical cathode terminal 5a is
The cathode terminal member 3 is electrically joined with the conductive adhesive 2. On the other hand, the shaft-shaped anode terminal 5b is used as the anode terminal member 4
Is electrically connected to the surface by resistance welding or the like.

When the capacitor element 1 is mounted, the tie bar members 6 and 6'are provided between the two cathode terminal members 3 and anode terminal members 4 and joined by resistance welding or the like. The tie bar members 6 and 6 ′ are disposed in front of and behind the capacitor element 1, and are used to secure the strength when the capacitor element 1 and the cathode terminal member 3 and the anode terminal member 4 are assembled.

After mounting the capacitor element 1, the capacitor element 1 mounted on the hoop-shaped cathode terminal member 3 and the anode terminal member 4 is sealed as in the prior art (Japanese Patent Laid-Open No. 3-157914). Cover with resin and hermetically seal.

Next, the cathode terminal member 3 and the anode terminal member 4 are separated from the tie bar members 6 and 6'in units of capacitors and molded to complete the chip type solid electrolytic capacitor 7 as individual products.

In this embodiment, since the capacitor element 1 has a cylindrical shape, when the cathode terminal member 3 is punched and formed, trapezoidal punches and dies 7 and 8 are formed. Are molded. However, it is possible to match the shape depending on the shape of the built-in capacitor element. Further, although the anode terminal member 4 is supplied as it is without being processed, it can be similarly processed according to the shape of the incorporated capacitor element.

[0023]

As described above, according to the present invention, the member for the anode terminal and the member for the cathode terminal are separately supplied and assembled by using the material of the hoop shape, so that the simplest hoop shape of the strip plate shape can be obtained. It is a terminal member of, available at low cost, and except for a part cut at the tie bar part,
Almost all of them are used in products, and the ratio of the cost to the conventional cost is 5 to 8%, but it is 2 to 4% in the present invention, and the ratio to the cost of the terminal member can be halved.

Further, since the cathode terminal member is processed on a capacitor-by-capacitor basis, the advantages of the hoop-shaped material supply which does not cause distortion due to batch processing are fully utilized, and the cathode terminal member is completely independent of the anode terminal member. Therefore, there is no influence of the processing, and it is possible to minimize the deviation in accuracy due to the processing and the connection of the capacitor elements.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a schematic view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Capacitor element 2 Conductive adhesive material 3 Cathode terminal member 4 Anode terminal member 5a Cathode terminal 5b Anode terminal 6,6 'Tie bar member 7,8 Mold

Continuation of front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location H01G 13/00 301 B 9174-5E H01G 9/05 F

Claims (3)

[Claims] 1. A method for manufacturing a chip-type solid electrolytic capacitor, comprising a step of assembling a capacitor element, wherein a terminal member is joined to a terminal of the capacitor element to assemble the capacitor element, wherein the terminal member is a capacitor element. It is composed of two strip-plate-shaped members for cathode terminals and members for anode terminals which are respectively joined to the cathode terminal and the anode terminal. A hoop-shaped material is used for these members. Two strip-shaped members for a cathode terminal and a member for an anode terminal are supplied while keeping a distance between the cathode terminal and the anode terminal of the capacitor element, and the cathode terminal and the anode terminal are connected to the cathode terminal member and the anode terminal. A method for manufacturing a chip-type solid electrolytic capacitor, characterized in that the chip-type solid electrolytic capacitor is joined to each of the members for use. 2. When supplying the anode terminal member and the cathode terminal member separately by using a hoop-shaped material, each member has a step of performing different processing, and the step of supplying the members for subsequent assembly steps. The method for manufacturing a chip-type solid electrolytic capacitor according to claim 1. 3. The tie bar member is provided so as to be suspended between the anode terminal member and the cathode terminal member when the capacitor element is incorporated in the hoop-shaped material.
A method for manufacturing the chip-type solid electrolytic capacitor described in.