JP2003243257A - Solid electrolytic capacitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid electrolytic capacitor that has a low ESR through excellent welding by eliminating the problem that the aluminum foil is welded only partly to the positive electrode comb terminal because of the large resistance of the oxidized dielectric film of a dielectric body and the ESR increases when connecting the positive electrode to the comb terminal lead. <P>SOLUTION: A through hole is provided in the positive electrodes 3 of the capacitor 1, and a plurality of the positive electrodes 3 are welded to the positive electrode comb terminal 6 by resistance welding through the hole. In this way, the welding is stabilized without scattering of aluminum foil pieces, and a solid electrolytic capacitor excellent in welded strength and reliability can be obtained with a low ESR. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid electrolytic capacitor used in various electronic devices.

[0002]

2. Description of the Related Art FIG. 16 is a sectional view showing the structure of a conventional solid electrolytic capacitor, FIG. 17 is a perspective view showing a capacitor element used in the same solid electrolytic capacitor, and FIG. 18 is an anode / cathode comb terminal of the same capacitor element. It is the perspective view which showed the state which laminated | stacked and laminated | stacked several sheets on top.

16 to 18, 19 is a capacitor element, and this capacitor element 19 is a dielectric oxide film layer 19b (on a surface of an anode body made of aluminum foil 19a (not shown) which is a valve metal). The resist portion 20 is provided after forming (not shown), and the anode portion 21 and the cathode portion 2 are formed.
It is constituted by separating into two and sequentially laminating a solid electrolyte layer and a cathode layer (neither is shown) on the surface of the cathode part 22.

Reference numeral 23 is an anode comb terminal, 24 is a cathode comb terminal, and 24a is a connecting portion formed by bending and raising a part of the flat surface of the cathode comb terminal 24. A plurality of cathode portions 22 are laminated on the front and back surfaces of the anode comb terminal 23 so as to be arranged on the front and rear surfaces of the cathode comb terminal 24, respectively, and the plurality of anode portions 21 of each capacitor element 19 are connected to the anode comb terminal 23, respectively. Are joined together by resistance welding, and the plurality of cathode portions 22 are connected to the cathode comb terminal 2 on the side surface in the thickness direction of the capacitor element 19.
4 is integrally connected to the connection portion 24a provided in No. 4 via a conductive silver paste (not shown).

Reference numeral 25 is the anode comb terminal 23 and the cathode comb terminal 2 of the capacitor element laminated body thus constructed.
4 is an insulative exterior resin that covers the capacitor element laminated body in a state in which a part of each of them is exposed to the outer surface, and the anode comb terminal 23 and the cathode comb terminal 24 exposed from the exterior resin 25 are the exterior resin 25 respectively. The surface mount type solid electrolytic capacitor is configured by being bent along (not shown).

[0006]

However, in the above-described conventional solid electrolytic capacitor, when the plurality of anode portions 21 of each capacitor element 19 are integrally joined to the anode comb terminals 23 by resistance welding, the anode portions 21 Since the dielectric oxide film layer 19b is formed on the surface, there is a problem that the dielectric oxide film layer 19b adversely affects and welding becomes extremely difficult.

That is, as shown in detail in FIG. 19, this phenomenon is because the anode part 21 of the capacitor element 19 has a structure in which the dielectric oxide film layer 19b is formed on the surface of the aluminum foil 19a. When the anode part 21 is joined to the copper-made anode comb terminal 23 by resistance welding, the dielectric oxide film layer 19b becomes a large resistance and the welding current becomes difficult to flow. Therefore, as shown in FIG. 19, a part of the aluminum foil 19a is formed. Only the anode comb terminal 23 is welded to the anode comb terminal 23, or in the worst case, no welding is caused, which causes not only a defect due to insufficient welding strength but also an increase in equivalent series resistance (hereinafter referred to as ESR) and an increase in variation. Had the problem that

In order to solve this problem, it is conceivable to increase the welding current or perform welding by laser welding. However, when welding is performed by such a method, the molten aluminum foil 19a is Anode part 2
Not only does the appearance of the aluminum foil 19a, such as the cut surface, of the aluminum foil 19a stick out or scatter on the exposed portion, but the airtightness decreases because the thickness of the exterior resin 25 is correspondingly reduced. It could not be adopted because a new problem such as a short circuit occurs.

Similarly, when the plurality of anode portions 21 of each capacitor element 19 are integrally joined to the anode comb terminals 23 by resistance welding, the thickness of the anode portion 21 is changed to the cathode portion 22.
Gaps are formed between the anode portions 21 because the thickness is smaller than the thickness of the anode portion 21. The anode portions 21 are bent to pressurize the welding electrodes 26 so as to crush the gaps, and in particular, the capacitor apart from the anode comb terminal 23 is used. This phenomenon becomes more prominent in the anode portion 21 of the element 19, and the anode portion 2 is bent and deformed.
There is also another problem that a crack occurs or breaks in a part of the dielectric oxide film layer 19b formed in No. 1 and a leakage current (LC) defect occurs.

The present invention solves these conventional problems,
An object of the present invention is to provide a solid electrolytic capacitor which has excellent weldability between the anode part and the anode comb terminal and can realize excellent reliability and low ESR.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention particularly relates to a capacitor element laminate in which capacitor elements having through-holes in the anode part are laminated, and The above-mentioned capacitor element laminate is covered with an anode comb terminal arranged and connected between the laminates of the anode part of the capacitor element laminate, a cathode comb terminal arranged and connected between the laminates of the same cathode part This is a structure made of external resin, which allows aluminum foil to scatter when joining multiple anode parts to the anode comb terminals by resistance welding through the through holes provided in the anode part of the capacitor element. It becomes possible to perform stable welding work without doing so, and it is possible to obtain a product having excellent welding strength and reliability and reduced ESR.

The invention according to claim 2 of the present invention is
Spacers for height adjustment are placed between the anode parts of the capacitor element stack.With this structure, the anode parts are crushed when they are joined to the anode comb terminals by resistance welding. Thus, it is possible to prevent the dielectric oxide film layer from being broken and thereby causing a leakage current (LC) defect to occur in advance.

The invention according to claim 3 of the present invention is
The spacer provided between the anode parts of the capacitor element laminate is provided with a recess into which the anode part is fitted. With this configuration, the positioning of the anode part is ensured and welding reliability is further improved. It has the effect of being able to do so.

The invention according to claim 4 of the present invention is
The spacer provided between the anode parts of the capacitor element laminate is folded back to form a two-layer structure except for the contact surface with the anode part. With this configuration, the invention according to claim 3 is obtained. It has the same action and effect as the obtained action and effect.

The invention according to claim 5 of the present invention is
Through-holes are provided at positions corresponding to the through-holes provided in the anode part of the capacitor element of the spacer provided between the anode parts of the capacitor element laminate. It has an effect that the reliability of welding can be further improved.

The invention according to claim 6 of the present invention is
The cathode comb terminal is provided by bending and raising a connection part for integrally connecting the cathode part of the laminated body on the side surface in the thickness direction of the capacitor element. With this configuration, the cathode side can be pulled out in the shortest time and the ESR It has an effect that a low product can be obtained.

The invention according to claim 7 of the present invention is
The anode parts of the capacitor element laminate are joined to each other by resistance welding through a through hole provided in the anode part.

The invention according to claim 8 of the present invention is
A through hole is provided at a position corresponding to the through hole provided in the anode part of the capacitor element of the spacer provided between the anode parts of the capacitor element laminate, and a rivet is inserted through the through hole. The respective anode parts are joined together, and with this configuration, the operational effect obtained by the invention of claim 1 can be obtained by a simple manufacturing apparatus and manufacturing method.

The invention according to claim 9 of the present invention is
Instead of the rivet that joins each anode part, each anode part is joined by a conductive adhesive.

According to a tenth aspect of the present invention, in particular, the joining of the anode parts of the capacitor element laminate is
It is crimped with a spacer through a through hole provided in the anode part.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Hereinafter, Embodiment 1 will be used to explain the invention particularly described in claims 1, 6, and 7.

FIG. 1 is a sectional view showing the structure of a solid electrolytic capacitor according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing a capacitor element used in the solid electrolytic capacitor, and FIG. FIG. 4 is a perspective view showing an anode / cathode comb terminal to be used, and FIG. 4 is a perspective view showing a state in which a plurality of the capacitor elements are stacked and mounted on the anode / cathode comb terminal.

1 to 4, reference numeral 1 denotes a capacitor element, and this capacitor element 1 has a dielectric oxide film layer 1b (see FIG. 1) on the surface of an anode body made of an aluminum foil 1a (not shown) which is a valve metal. (Not shown), a resist portion 2 is provided to separate the anode portion 3 and the cathode portion 4, and a solid electrolyte layer and a cathode layer (both not shown) are sequentially laminated on the surface of the cathode portion 4 The anode portion 3 is further provided with a through hole 5.

6 is an anode comb terminal, 7 is a cathode comb terminal, 7
Reference numeral a is a connecting portion formed by bending and raising a part of the flat surface of the cathode comb terminal 7. The anode portion 3 of the capacitor element 1 is on the front and back surfaces of the anode comb terminal 6, and the cathode portion 4 is the cathode comb. A plurality of sheets are laminated so as to be arranged on the front and back surfaces of the terminal 7, respectively, and the plurality of anode portions 3 of each capacitor element 1 are connected to the anode comb terminals 6 through the through holes 5 provided in the anode portion 3, respectively. The cathode portions 4 are integrally joined by welding, and the plurality of cathode portions 4 are integrally attached to the connecting portion 7a provided on the cathode comb terminal 7 on the side surface in the thickness direction of the capacitor element 1 via a conductive silver paste (not shown). It is connected.

Numeral 8 is an insulating material which covers the capacitor element laminated body in a state in which the anode comb terminal 6 and the cathode comb terminal 7 of the capacitor element laminated body constructed in this manner are partially exposed to the outer surface. The anode comb terminal 6 and the cathode comb terminal 7 exposed from the exterior resin 8 are bent along the exterior resin 8 (not shown) to form a surface mount type solid electrolytic capacitor. It is a thing.

The solid electrolytic capacitor according to the first embodiment having the above-described structure has a structure in which the anode portion 3 is anodized by resistance welding through the through hole 5 provided in the anode portion 3, as shown in detail in FIG. Since the structure is such that it is bonded to the comb terminal 6, the dielectric oxide film layer 1b formed on the surface of the anode part 3 is eliminated in the through hole 5 portion so that the aluminum foil 1 is not formed.
Since a is exposed, the molten aluminum foil 1a is concentrated inside the through hole 5, and resistance welding can be performed extremely easily and reliably.

As a result, not only the welding workability and reliability are stabilized, but also the molten aluminum foil 1 as in the conventional case 1
Since "a" is not scattered to the outside, it is possible to stably perform excellent bonding, in which airtightness is not deteriorated and a short circuit is not generated at all. In FIG. 5, reference numeral 9 is a welding electrode.

The ESR characteristics of the solid electrolytic capacitor (four-layer laminated product in which four capacitor elements 1 are laminated) according to the first embodiment thus constituted are measured and compared with the conventional product (Table 1). Shown in.

[0029]

[Table 1]

As is clear from this (Table 1), the solid electrolytic capacitor according to the first embodiment has a small variation in ESR and a low average level, and the anode part 3 and the anode comb terminal 6 are welded. It can be seen that is performed extremely well and stably.

6 (a) and 6 (b) show another example of the through hole 5 provided in the anode portion 3. A plurality of circular through holes 5a may be provided, or an oval through hole may be provided. The purpose is to increase the area of the welded portion by using 5b or the like, and the optimum shape may be set appropriately depending on the shape and size of the anode portion 3.

(Second Embodiment) The second embodiment of the present invention will be described below, particularly the invention described in claim 2.

The second embodiment has a structure in which spacers for height adjustment are arranged between the respective anode parts of the solid electrolytic capacitor shown in the first embodiment, and other structures are the same as those of the first embodiment. 1 is the same as the first embodiment, the same reference numerals are given to the same portions, and the description thereof will be omitted. Only different portions will be described below with reference to the drawings.

FIG. 7 is a sectional view showing a structure of a solid electrolytic capacitor according to a second embodiment of the present invention, and FIG. 8 is a perspective view showing a spacer joined to the same capacitor element.

In FIGS. 7 and 8, 10 is a metal spacer, and this spacer 10 is formed to have substantially the same size as the anode part 3 of the capacitor element 1 and through the through hole 5 provided in the anode part 3. Is joined to the anode part 3 by resistance welding,
The total thickness of the spacer 10 and the anode portion 3 after joining is configured to be substantially the same as the thickness of the cathode portion 4 of the capacitor element 1. In this way, a plurality of capacitor elements 1 in which the spacers 10 are joined to the anode part 3 are laminated on both sides of the anode comb terminal 6 and the cathode comb terminal 7, respectively, and the cathode part 4 side is coated with a conductive adhesive (not shown). Joining is performed, and the anode portion 3 side is joined by resistance welding to be assembled.

The solid electrolytic capacitor according to the second embodiment having the above-described structure has the anode portion 3 of the capacitor element 1.
By providing a height adjusting spacer 10 on the anode so that the thickness on the side of the anode part 3 is approximately the same as the thickness of the cathode part 4, a plurality of capacitor elements 1 are laminated to form the anode part 3. The anode part 3 is not bent and crushed when it is joined to the anode comb terminal 6 by resistance welding, so that the dielectric oxide film layer formed on the surface of the anode part 3 is not cracked or destroyed. Therefore, it becomes possible to stably produce a product with a small leakage current.

The results of measuring the leakage current characteristics of the solid electrolytic capacitor according to the second embodiment thus constructed are shown in Table 2 in comparison with the conventional product and the solid electrolytic capacitor according to the first embodiment.

[0038]

[Table 2]

As is clear from (Table 2), the solid electrolytic capacitor according to the second embodiment has a structure in which the stress applied to the anode part 3 is eliminated as much as possible, so that the leakage current is greatly reduced. Since the effect is remarkably exhibited when the number of laminated elements 1 is increased, it can be said that the method is suitable as a means for realizing a solid electrolytic capacitor having an increased capacity by increasing the number of laminated capacitor elements 1. It is a thing.

(Third Embodiment) The third embodiment of the present invention will be described below with reference to the present invention.

The third embodiment has a structure in which the shape of the spacer for height adjustment arranged between the anode parts of the solid electrolytic capacitor shown in the second embodiment is changed, and other structures are used. Since the second embodiment is similar to the second embodiment, the same parts are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described below with reference to the drawings.

FIG. 9 is a perspective view showing a structure of a solid electrolytic capacitor according to a third embodiment of the present invention. In FIG. 9, 11 is a spacer, 11a is a recess provided in this spacer 11, and this recess 11a is shown. Is configured such that the anode portion 3 of the capacitor element 1 having a convex tip is fitted.

Then, the spacer 1 thus constructed
The anode part 3 of the capacitor element 1 is fitted into the recess 11a of the capacitor 1 and the spacer 11 is joined to the anode part 3 by resistance welding through the through hole 5 provided in the anode part 3.

The solid electrolytic capacitor according to the third embodiment having the above-described structure has the concave portion 1 provided in the spacer 11.
Since the capacitor element 1 is reliably positioned with respect to the spacer 11 in a state where the anode part 3 of the capacitor element 1 is fitted in 1a, a more reliable welding work is performed to produce a highly reliable solid electrolytic capacitor. You will be able to do that.

(Embodiment 4) Hereinafter, the invention of claim 4 of the present invention will be described with reference to Embodiment 4.

The fourth embodiment has a structure in which the shape of the spacer for height adjustment arranged between the anode parts of the solid electrolytic capacitor shown in the second embodiment is changed, and a structure other than this is adopted. Since the second embodiment is similar to the second embodiment, the same parts are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described below with reference to the drawings.

FIG. 10 is a perspective view showing the structure of a solid electrolytic capacitor according to a fourth embodiment of the present invention. In FIG. 10, 12 is a spacer, and 12a are both ends of the spacer 12 excluding the contact surface with the anode part 3. The bent portions each having a double-layered structure are shown by folding back the portions, and the anode portion 3 of the capacitor element 1 having a convex tip is disposed between the bent portions 12a formed so as to face each other. It is configured as follows.

Then, the spacer 1 thus constructed
The anode part 3 of the capacitor element 1 is provided between the two bent parts 12a.
And the spacer 12 is joined to the anode part 3 by resistance welding through the through hole 5 provided in the anode part 3.

The thus constructed solid electrolytic capacitor according to the fourth embodiment has a structure in which the both ends of the spacer 12 are respectively folded back to provide the bent portion 12a having a two-layer structure. The same effect as that of No. 3 can be obtained.

(Fifth Embodiment) The fifth embodiment of the present invention will be described below with reference to the present invention.

In the fifth embodiment, the structure of the spacer for height adjustment arranged between the anode parts of the solid electrolytic capacitor shown in the second embodiment and the method of joining the anode part and the anode comb terminal are described. Since the other configurations are the same as those of the second embodiment, the same reference numerals are given to the same portions and the description thereof will be omitted. Only the different portions will be described below with reference to the drawings. explain.

FIG. 11 is a sectional view showing the structure of a solid electrolytic capacitor according to the fifth embodiment of the present invention, and FIGS.
FIG. 13C is a perspective view showing a spacer used in the solid electrolytic capacitor, and FIGS.
b, 13c are spacers for height adjustment, 14a, 14b,
Reference numeral 14c is a through hole provided at a position corresponding to the through hole 5 provided in the anode portion 3 of the capacitor element 1 of these spacers 13a, 13b, 13c.
Through holes 5a and spacers provided in each anode part 3 in a state in which a plurality of capacitor elements 1 are stacked on the anode comb terminal 6 by providing the through holes 14a, 14b, 14c in a, 13b, 13c. All the through holes 14a, 14b, 14c provided in 13a, 13b, 13c communicate with each other to form a single through hole (it is necessary to provide the through hole also in the corresponding portion of the anode comb terminal 6). The rivet 15 is inserted into the one through hole, and the rivet 1
The anode part 3 and the anode comb terminal 6 are joined by crimping 5.

With such a structure, it is possible to obtain a high-performance and highly reliable solid electrolytic capacitor with a simple manufacturing apparatus and manufacturing method because the joining can be performed without using a resistance welding machine. It is a thing.

(Sixth Embodiment) The sixth embodiment of the present invention will be described below.

The sixth embodiment has a structure in which the method of joining the anode part and the anode comb terminal of the solid electrolytic capacitor shown in the fifth embodiment is changed, and the other structures are the same as those of the fifth embodiment. For this reason, the same parts are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described below with reference to the drawings.

FIG. 13 is a sectional view showing the structure of a solid electrolytic capacitor according to a sixth embodiment of the present invention. In FIG. 13, 13a is a height adjusting spacer. In the same manner as in the fifth embodiment, the through hole 14a (not shown) is provided at a position corresponding to the through hole 5 provided in the anode portion 3 of the capacitor element 1.

In this way, with the plurality of capacitor elements 1 laminated on the anode comb terminal 6, the through hole 5 provided in each anode part 3 and the through hole 14a provided in each spacer 13a are all communicated to form one through hole. With holes formed (anode comb terminal 6
It is necessary to provide a through hole also in the corresponding portion of No. 3), and the conductive adhesive 16 is filled into the one through hole so that the anode part 3 and the anode comb terminal 6 are joined. It was done.

With such a structure, it is possible to obtain a high-performance and highly reliable solid electrolytic capacitor with a simple manufacturing apparatus and manufacturing method because the joining can be performed without using a resistance welding machine. It is a thing.

(Embodiment 7) In the following, Embodiment 7 will be used to explain the invention of claim 10 of the present invention.

The seventh embodiment has a configuration in which the method of joining the anode portion and the anode comb terminal of the solid electrolytic capacitor shown in the second embodiment is changed, and other configurations are the same as those of the second embodiment. For this reason, the same parts are designated by the same reference numerals and the description thereof will be omitted. Only different parts will be described below with reference to the drawings.

FIG. 14 is a sectional view showing the structure of a solid electrolytic capacitor according to a seventh embodiment of the present invention, FIG. 15 is a perspective view showing the same capacitor element, and in FIGS. 14 and 15, 17 is a height adjustment. The spacer 17 for height adjustment has a through hole 18 formed therein, and the anode part 3 of the capacitor element 1 is joined by caulking through the through hole 18. It was done.

With such a structure, it is possible to obtain a high-performance and highly reliable solid electrolytic capacitor by a simple manufacturing apparatus and manufacturing method because the joining can be performed without using a resistance welding machine. It is a thing.

[0063]

As described above, the solid electrolytic capacitor according to the present invention has a structure in which a through hole is provided in the anode part of the capacitor element, and a plurality of anode parts are joined to the anode comb terminal by resistance welding through the through hole. By doing so, it becomes possible to perform stable welding work without the aluminum foil scattering, and it is possible to obtain a solid electrolytic capacitor having excellent welding strength and reliability and reduced ESR. .

Further, by providing a spacer for height adjustment between the respective anode parts of the capacitor element,
When a plurality of anode parts are joined to the anode comb terminals by resistance welding, the anode parts are crushed and bent, which breaks the dielectric oxide film layer and causes leakage current (LC) defects. Therefore, it is possible to stably obtain an excellent solid electrolytic capacitor having low ESR and no LC defects.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a solid electrolytic capacitor according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a capacitor element used in the solid electrolytic capacitor.

FIG. 3 is a perspective view showing an anode / cathode comb terminal used in the solid electrolytic capacitor.

FIG. 4 is a perspective view showing a state in which a plurality of the same capacitor elements are stacked and mounted on an anode / cathode comb terminal.

FIG. 5 is a sectional view of an essential part showing a state in which the same anode part is joined to an anode comb terminal

6A and 6B are perspective views showing another example of a through hole in the anode part.

FIG. 7 is a sectional view showing a configuration of a solid electrolytic capacitor according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing a spacer joined to the capacitor element.

FIG. 9 is a perspective view showing a configuration of a solid electrolytic capacitor according to a third embodiment of the present invention.

FIG. 10 is a perspective view showing a configuration of a solid electrolytic capacitor according to a fourth embodiment of the present invention.

FIG. 11 is a sectional view showing the structure of a solid electrolytic capacitor according to a fifth embodiment of the present invention.

FIG. 12 (a) to (c) are perspective views showing spacers used in the solid electrolytic capacitor.

FIG. 13 is a sectional view showing the structure of a solid electrolytic capacitor according to a sixth embodiment of the present invention.

FIG. 14 is a sectional view showing the structure of a solid electrolytic capacitor according to a seventh embodiment of the present invention.

FIG. 15 is a perspective view showing a capacitor element used in a solid electrolytic capacitor according to a seventh embodiment of the present invention.

FIG. 16 is a sectional view showing the configuration of a conventional solid electrolytic capacitor.

FIG. 17 is a perspective view showing a capacitor element used in the solid electrolytic capacitor.

FIG. 18 is a perspective view showing a state in which a plurality of the same capacitor elements are stacked and mounted on an anode / cathode comb terminal.

FIG. 19 is a cross-sectional view of an essential part showing a state in which the anode part is joined to an anode comb terminal.

[Explanation of symbols]

1 Capacitor element 1a Aluminum foil 1b Dielectric oxide film layer 2 Resist part 3 Anode part 4 Cathode part 5, 5a, 5b, 14a, 14b, 14c Through hole 6 Anode comb terminal 7 Cathode comb terminal 7a Connection part 8 Exterior resin 9 Welding Electrodes 10, 11, 12, 13a, 13b, 13c, 17 Spacer 11a Recessed portion 12a Bent portion 15 Rivet 16 Conductive adhesive 18 Through hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yukihiro Utaki             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Masahiro Yabushita             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Izuo Kojima             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd.

Claims (10)

[Claims] 1. An anode body made of a valve metal is separated into an anode section and a cathode section, and a dielectric oxide film layer is formed on the surface of the cathode section.
A solid electrolyte layer and a cathode layer are sequentially laminated, and a capacitor element laminated body in which a plurality of capacitor elements having a through hole formed in the anode portion is laminated, and a capacitor element laminated body is disposed between the anode portion laminated layers. Anode comb terminal connected by
A cathode comb terminal arranged and connected between the cathode layers and the anode comb terminal and a part of the cathode comb terminal are exposed on the outer surface of the capacitor element laminated body in an insulating state. Solid electrolytic capacitor made of exterior resin. 2. The solid electrolytic capacitor according to claim 1, wherein spacers for height adjustment are arranged between the respective anode parts of the capacitor element laminate. 3. The solid electrolytic capacitor according to claim 2, wherein the spacer provided between the anode parts of the capacitor element laminate is provided with a recess into which the anode part is fitted. 4. The solid electrolytic capacitor according to claim 2, wherein a part of the spacer provided between the anode parts of the capacitor element laminate except for a contact surface with the anode part is folded back to form a two-layer structure. 5. The solid electrolytic capacitor according to claim 2, wherein a through hole is provided at a position corresponding to a through hole provided in the anode part of the capacitor element of the spacer provided between the anode parts of the capacitor element laminate. . 6. The solid electrolytic capacitor according to claim 1, wherein the cathode comb terminal is provided with a connecting portion for integrally connecting the cathode portion of the capacitor element laminate on the side surface in the thickness direction of the capacitor element by bending and raising. 7. The solid electrolytic capacitor according to claim 1, wherein the respective anode parts of the capacitor element laminate are joined by resistance welding through a through hole provided in the anode part. 8. A through hole is provided at a position corresponding to the through hole provided in the anode part of the capacitor element of the spacer provided between the anode parts of the capacitor element laminate, and is inserted so as to penetrate each through hole. 3. The solid electrolytic capacitor according to claim 2, wherein the respective anode parts are joined via the rivets. 9. Instead of a rivet for joining each anode part,
The solid electrolytic capacitor according to claim 8, wherein the respective anode parts are joined by a conductive adhesive. 10. The solid electrolytic capacitor according to claim 2, wherein the anode parts of the capacitor element laminate are joined together by caulking with the spacer through a through hole provided in the anode part.