JP2011176219A - Solid electrolytic capacitor and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid electrolytic capacitor which provides low ESR without using a lead frame having a special shape, and also to provide a method of manufacturing the same. <P>SOLUTION: In capacitor elements, a positive electrode portion 6 is formed on one side of a positive electrode element formed of valve metal and a dielectric film and a solid electrolyte layer which becomes a negative electrode portion are formed on the other side. A solid electrolytic capacitor is formed by sealing the capacitor elements C1, C2, and C3 with an exterior resin 12. The solid electrolytic capacitor is equipped with: a metal electrode drawing member 9 which is connected to the solid electrolyte layer via a conductive paste 8, and which includes carbon on the surface; a negative electrode lead 10 connected to the electrode drawing member 9; and a positive electrode lead 11 connected to the positive electrode portion 6. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a solid electrolytic capacitor and a method for manufacturing the same.

  Conventionally, a capacitor element in a solid electrolytic capacitor has an oxide film layer formed on one surface of an anode element 1 made of a valve metal such as aluminum or tantalum as shown in FIG. It is known that the dielectric film 2 is formed, and further, a solid electrolyte layer 3, a carbon layer 4, and a silver layer 5 are sequentially formed on the surface of the dielectric film 2 to form a cathode portion (see, for example, Patent Document 1). . In this capacitor element, a scooping prevention material 7 formed in a ring shape is provided between the anode portion 6 and the solid electrolyte layer 3 to insulate and isolate the anode portion 6 and the solid electrolyte layer 3. Note that manganese dioxide, a TCNQ complex, a conductive polymer, or the like is generally used as the solid electrolyte layer 3.

  In recent years, a solid electrolytic capacitor having a large capacity and a low ESR has been strongly demanded.

  As one method for realizing a large capacity, a method of stacking a plurality of flat capacitor elements so as to have a predetermined capacity is known. In the solid electrolytic capacitor using this method, the anode parts and the cathode parts of the capacitor element are connected to the respective lead frames so as to overlap each other (see, for example, Patent Document 2).

  On the other hand, as one technique for realizing low ESR, there is known a technique for increasing the contact area between the cathode portion and the lead frame by using a lead frame having a special shape subjected to bending or the like. As shown in FIGS. 8 and 9, in the solid electrolytic capacitor using this technique, a lead frame is provided with a bent portion, and a plurality of plate-like capacitor elements are stacked and arranged in the bent portion ( For example, see Patent Document 3). According to this solid electrolytic capacitor, by connecting the side surface of the cathode portion of the capacitor element to the bent portion, the contact area between the cathode portion and the lead frame can be increased to achieve low ESR.

Japanese Patent No. 2996992 JP 2000-68158 A JP 2003-45753 A

  In the capacitor element in the solid electrolytic capacitor described in Patent Documents 1 to 3, the cathode part is configured by sequentially forming the solid electrolyte layer 3, the carbon layer 4, and the silver layer 5 on the surface of the dielectric film 2. The solid electrolyte layer 3 and the lead frame are preferably connected with a member having as low an electric resistance as possible. However, since the solid electrolyte layer 3 and the silver layer 5 have high interface resistance, it is necessary to provide the carbon layer 4 between the two layers. There is. Further, since the interface resistance of the carbon layer 4 and the lead frame is increased, the silver layer 5 and the silver paste are necessary. However, connection resistance occurs at the interface between the solid electrolyte layer 3 and the carbon layer 4 and at the interface between the carbon layer 4 and the silver layer 5. Further, the silver layer 5 is connected to the lead frame via the silver paste that is a conductive paste. Therefore, connection resistance was also generated at the interface between the silver layer 5 and the silver paste and at the interface between the silver paste and the lead frame. That is, between the solid electrolyte layer 3 and the lead frame, the ESR is high because there are four layers-to-layer interfaces that contribute to an increase in resistance.

  In the solid electrolytic capacitor described in Patent Document 2, since only the back surface of the lowermost capacitor element among the plurality of capacitor elements stacked is connected to the lead frame, the cathode portion and the lead frame The contact area was small and the ESR was high.

  In the solid electrolytic capacitor described in Patent Document 3, although the contact area between the cathode portion and the lead frame is increased to achieve low ESR, the shape of the lead frame is complicated and difficult to process. There was a problem.

  In view of the above problems, an object of the present invention is to provide a solid electrolytic capacitor capable of realizing low ESR without using a lead frame having a special shape, and a method for manufacturing the same.

  In order to solve the above-mentioned problems, a solid electrolytic capacitor according to the present invention is a capacitor in which an anode part made of a valve metal is formed on one side with an anode part, and on the other side a dielectric film and a solid electrolyte layer that becomes a cathode part are formed. A solid electrolytic capacitor formed by sealing an element with an exterior resin, connected to a solid electrolyte layer through a conductive paste and made of a metal electrode lead member containing carbon on the surface, and an electrode lead member It is characterized by comprising a connected cathode lead and an anode lead connected to the anode part.

  According to the above configuration, the cathode part of the element is formed substantially only by the solid electrolyte layer without forming the carbon layer and the silver layer in the capacitor element. More specifically, the electrode contains carbon on the surface. Since the lead member is used and the electrode lead member is disposed opposite to the solid electrolyte layer, and the electrode lead member and the solid electrolyte layer are connected via the conductive paste, the number of layers formed in the capacitor element is reduced. be able to. Accordingly, resistance between the layers can be reduced, so that low ESR can be realized.

  The solid electrolytic capacitor according to the present invention includes a plurality of capacitor elements in which a flat anode element made of a valve metal is formed with an anode portion on one side and a dielectric film and a solid electrolyte layer serving as a cathode portion on the other side. A solid electrolytic capacitor in which a laminated body is formed by laminating in the same direction and the laminated body is sealed with an exterior resin, and connected to each of the solid electrolyte layers included in the laminated body via a conductive paste And a plurality of electrode extraction members containing carbon on the surface drawn in the same direction from the laminate, a cathode lead connected to the plurality of electrode extraction members, and an anode part included in the laminate And an anode lead.

  According to the above configuration, since the cathode portion is formed substantially only by the solid electrolyte layer, the number of layers formed in the capacitor element can be reduced. Therefore, the resistance between the layers can be reduced, and the electrode leading member containing carbon on the surface is used and the electrode leading member is disposed opposite to the solid electrolyte layer, so that low ESR can be realized. it can. Further, according to the above configuration, since the electrode extraction member containing carbon on the surface is connected to each of the cathode portions (solid electrolyte layers) included in the laminate, the cathode portion and the electrode extraction member The contact area becomes larger and low ESR can be realized.

  In the above configuration, each of the plurality of capacitor elements preferably has a front surface and a back surface orthogonal to the stacking direction, and the front surface and the back surface are connected to separate electrode lead members.

  According to the above configuration, since the contact area between the cathode portion and the electrode lead member is increased, the ESR can be further reduced.

  Further, in the above configuration, two laminated bodies are provided, and an anode part included in one laminated body and a plurality of electrode lead members drawn out from the one laminated body are connected to the surface side of the anode lead and the cathode lead, respectively. The anode portion included in the other laminate and the plurality of electrode lead members drawn from the other laminate are connected to the back surfaces of the anode lead and the cathode lead, respectively.

  According to the above configuration, since one of the two laminates is connected to the front surface side of the lead frame and the other is connected to the back surface side of the lead frame so as to sandwich the lead frame, the space on the back surface side of the lead frame is reduced. A large-capacity solid electrolytic capacitor that is effectively utilized can be manufactured.

  Further, in the above configuration, the conductive paste is preferably made of carbon paste, and the electrode lead member is preferably made of aluminum foil containing carbon on the surface.

  According to the said structure, since the aluminum foil is used as an electrode extraction member, the connection by resistance welding with respect to a lead frame is attained. Further, since carbon is contained in both the conductive paste and the electrode lead member, the adhesion between the electrode lead member and the carbon paste is improved. Therefore, ESR can be further reduced.

  The method for producing a solid electrolytic capacitor according to the present invention includes a capacitor element in which an anode part made of a valve metal is formed on one side with a solid electrolyte layer serving as a dielectric film and a cathode part on the other side using an exterior resin. A method of manufacturing a solid electrolytic capacitor by sealing, a step of applying a conductive paste to a metal electrode lead member including a carbon layer on the surface, and a step of applying the conductive paste of the solid electrolyte layer and the electrode lead member And a step of connecting the electrode lead member and the cathode lead, and a step of connecting the anode part and the anode lead.

  Further, the method for manufacturing a solid electrolytic capacitor according to the present invention includes a plurality of plate-like anode elements made of a valve metal having an anode portion on one side and a dielectric film and a solid electrolyte layer serving as a cathode portion on the other side. A method for producing a solid electrolytic capacitor in which capacitor elements are laminated in the same direction to form a laminate, and the laminate is sealed with an exterior resin, and a plurality of electrodes made of metal including a carbon layer on the surface The laminate includes a step of applying the conductive paste to the extraction member and a portion where the conductive paste of the plurality of electrode extraction members is applied so that the plurality of electrode extraction members are extracted from the laminate in the same direction. The method includes a step of connecting to each of the solid electrolyte layers, a step of connecting a plurality of electrode lead members to the cathode lead, and a step of connecting an anode portion included in the laminate to the anode lead.

  Furthermore, the method for manufacturing a solid electrolytic capacitor according to the present invention includes a capacitor element in which an anode part is formed on one side of an anode element made of a valve metal and a dielectric film and a solid electrolyte layer serving as a cathode part are formed on the other side. A method for producing a solid electrolytic capacitor encapsulated with a resin, comprising a step of applying a conductive paste to a solid electrolyte layer, a portion of the solid electrolyte layer coated with the conductive paste, and a surface containing carbon The method includes a step of connecting the metal electrode lead member, a step of connecting the electrode lead member and the cathode lead, and a step of connecting the anode portion and the anode lead.

  Further, the method for manufacturing a solid electrolytic capacitor according to the present invention includes a plurality of plate-like anode elements made of a valve metal having an anode portion on one side and a dielectric film and a solid electrolyte layer serving as a cathode portion on the other side. A method of manufacturing a solid electrolytic capacitor in which capacitor elements are laminated in the same direction to form a laminate, and the laminate is sealed with an exterior resin, and a step of applying a conductive paste to the solid electrolyte layer; The portion where the conductive paste of the solid electrolyte layer contained in the laminate is applied is drawn so that a plurality of metal electrode drawing members containing carbon on the surface are drawn from the laminate in the same direction. The method includes a step of connecting to each of the members, a step of connecting a plurality of electrode lead members to a cathode lead, and a step of connecting an anode portion included in the laminate to the anode lead.

  According to the above configuration, since the conductive paste is applied to the electrode extraction member or the solid electrolyte layer including the carbon layer on the surface and the solid electrolyte layer and the electrode extraction member are connected, the interface resistance via the conductive paste Can be lowered. For this reason, since the number of steps can be reduced, it is possible to prevent the dielectric film from being defective and to prevent the leakage current characteristic from deteriorating.

  ADVANTAGE OF THE INVENTION According to this invention, the solid electrolytic capacitor which can implement | achieve low ESR, and its manufacturing method can be provided, without using the lead frame of a special shape.

It is a capacitor | condenser element used with the solid electrolytic capacitor which concerns on 1st Embodiment, Comprising: (a) is a top view, (b) is sectional drawing. It is sectional drawing of the solid electrolytic capacitor which concerns on 1st Embodiment. 2 is an example of a lead frame used in the solid electrolytic capacitor according to the first embodiment. It is a perspective view which shows the internal structure of the solid electrolytic capacitor which concerns on 1st Embodiment. It is sectional drawing of the solid electrolytic capacitor which concerns on 2nd Embodiment. It is sectional drawing of the solid electrolytic capacitor which concerns on 3rd Embodiment. It is a capacitor | condenser element used with the conventional solid electrolytic capacitor, Comprising: (a) is a top view, (b) is sectional drawing. It is an example of the lead frame used with the conventional solid electrolytic capacitor. It is an example of the lead frame used with the conventional solid electrolytic capacitor.

  Preferred embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
FIG. 1A is a plan view of a capacitor element used in the solid electrolytic capacitor according to the first embodiment, and FIG. The capacitor element C according to this embodiment includes an anode element 1, a dielectric film 2, a solid electrolyte layer 3, an anode portion 6, and a creeping prevention material 7, and a carbon layer 4 is formed on the surface of the solid electrolyte layer 3. And the point from which the silver layer 5 is not formed differs from the conventional capacitor | condenser element shown in FIG.

  The anode element 1 is a flat thin plate made of a valve metal having aluminum as a main component, and one side thereof constitutes an anode portion 6. Dielectric film 2 is an oxide film layer formed on the other surface of anode element 1. The solid electrolyte layer 3 is a layer formed on the surface of the dielectric film 2 and constitutes a cathode part. The solid electrolyte layer 3 is formed, for example, by chemical polymerization, electrolytic polymerization, or impregnation of an electrolyte containing a conductive polymer such as polyethylenedioxythiophene (PEDOT). The creeping prevention material 7 is a ring-shaped film that is provided between the anode portion 6 and the solid electrolyte layer 3 and insulates and isolates the anode portion 6 and the solid electrolyte layer 3.

  FIG. 2 is a cross-sectional view of the solid electrolytic capacitor according to the present embodiment. As shown in the figure, the solid electrolytic capacitor according to the present embodiment includes a laminate 13 composed of a plurality of capacitor elements, a conductive paste 8, an electrode lead member 9, a cathode lead 10, an anode lead 11, The exterior resin 12 is comprised.

  The laminated body 13 is obtained by laminating three capacitor elements C1, C2, and C3 in the same direction. The anode portions 6 of the capacitor elements C1, C2, and C3 are joined to each other by welding or the like at their tip portions. Moreover, the length of the anode part 6 is longer as the capacitor element is farther from the junction. Specifically, the length of the anode portion 6 is longer in the capacitor elements C1 and C3 than in the capacitor element C2. Thereby, when joining the anode parts 6, the stress, distortion, etc. concerning each anode part 6 and each cathode part can be relieved.

  The conductive paste 8 is for electrically and physically connecting the solid electrolyte layer 3 and the electrode lead member 9, and a carbon paste obtained by mixing a resin paste and carbon is preferable.

  The electrode lead member 9 has one side connected to the solid electrolyte layer 3 via the conductive paste 8 and the other side connected to the cathode lead 10. In addition, the solid electrolytic capacitor according to the present embodiment includes four electrode extraction members 9, and different electrode extraction members 9 are connected to the front and back surfaces of the capacitor elements C1, C2, and C3, respectively. Thereby, the contact area of the electrode extraction member 9 and the solid electrolyte layer 3 becomes large, and low ESR can be realized. In addition, since the electrode extraction member 9 is connected to the cathode lead 10 by resistance welding or laser welding, for example, an aluminum foil having a thickness of 30 μm is used. Carbon is supported on the surface of the aluminum foil in consideration of adhesion to the carbon paste that is the conductive paste 8. Further, when the electrode lead member 9 is connected to the cathode lead 10 by a method other than welding such as resistance welding, for example, when the electrode lead member 9 is connected by silver paste, a carbon foil made of only carbon may be used as the electrode lead member 9. Good. Further, the electrode lead-out member 9 is made of a material that is relatively soft even in a thin state such as a copper foil and has a small specific resistance, or a hard metal such as 42 alloy that has been processed into a predetermined shape in advance to contain carbon. It may be used.

  As the cathode lead 10 and the anode lead 11, those having a general shape which is not special as shown in FIG.

  As described above, in the solid electrolytic capacitor according to the present embodiment, the cathode portion is formed substantially only by the solid electrolyte layer 3 without forming the carbon layer 4 and the silver layer 5. For this reason, regarding the layer provided between the solid electrolyte layer 3 and the cathode lead 10, the number other than the metal-to-metal junction is the number of solid electrolyte 3 -carbon layer 4, carbon layer 4 -silver in a conventional solid electrolytic capacitor. In contrast to the layer 5, the silver layer 5 -silver paste, and the silver paste-cathode lead, the solid electrolytic capacitor according to this embodiment has the solid electrolyte layer 3 -conductive paste 8, conductive paste 8 -electrode. It becomes two of drawing-out members 9. That is, in the solid electrolytic capacitor according to the present embodiment, the number of interfaces between layers that contributes to an increase in resistance is reduced, and the electrode lead member 9 and the cathode lead 10 are welded. Can be realized.

  Furthermore, in the solid electrolytic capacitor according to the present embodiment, since the plurality of electrode extraction members 6 are connected to each of the solid electrolyte layers 3 via the conductive paste 8, the cathode portion (solid electrolyte layer 3) and the electrode extraction are provided. The contact area with the member 6 is increased, and low ESR can be realized.

  Next, a method for manufacturing the solid electrolytic capacitor according to this embodiment will be described.

  First, an anode element 1 made of a long aluminum foil having a thickness of 120 μm whose surface was electrochemically roughened was anodized for about 60 minutes by applying a voltage of 10 V in an aqueous solution of ammonium adipate. Then, the dielectric film 2 which is an oxide film layer is formed. Next, after the anode element 1 on which the dielectric film 2 is formed is cut into a flat plate shape, an insulating resin is applied around an appropriate position so as to be wound in the circumferential direction to form a scooping prevention material 7, and the anode portion It is divided into a region to be 6 and a region to be the cathode part. Next, the end face portion where the anode element 1 is exposed by the cutting is subjected to an anodic oxidation treatment for about 30 minutes by applying a voltage of 7 V again in an aqueous solution of ammonium adipate to form the dielectric film 2 on the cut surface. Then, the capacitor element C is completed by forming the solid electrolyte layer 3 which becomes a cathode part on the surface of the dielectric film 2.

  Separately from the production of the capacitor element C, the conductive paste 8 is applied to a part of the electrode lead member 9 made of an aluminum foil having a thickness of 30 μm with carbon supported on the surface. As the conductive paste 8, a carbon paste is used in consideration of adhesion to the electrode lead member 9.

  Subsequently, the portion of the electrode extraction member 9 to which the conductive paste 8 is applied is connected to the solid electrolyte layer 3 of the capacitor elements C1, C2, and C3 produced by the above method, and the electrode extraction member 9 is connected to the solid electrolyte layer. 3 is laminated so that the capacitor elements C1, C2, and C3 are pulled out in the same direction and in the same direction. As shown in FIG. 2, separate electrode lead members 9 are connected to the front and back surfaces orthogonal to the direction of lamination of the capacitor elements C1, C2, and C3.

  Subsequently, the electrode extraction members 9 connected to each of the solid electrolyte layers 3 included in the multilayer body 13 are connected by resistance welding, and the anode portions 6 included in the multilayer body 13 are connected by resistance welding. Next, the electrode lead member 9 and the anode portion 6 are connected to the cathode lead 10 and the anode lead 11 shown in FIG. 3 by resistance welding, respectively. Thereafter, as shown in FIG. 4, the solid electrolytic capacitor is completed by sealing with the exterior resin 12 and forming the cathode lead 10 and the anode lead 11 along the side surface of the exterior resin 12.

  Table 1 shows a solid electrolytic capacitor (Example) according to the first embodiment manufactured by the above method, and a conventional solid electrolytic capacitor (conventional solid-state capacitor) having a cathode portion composed of a solid electrolyte layer 3, a carbon layer 4 and a silver layer 5. It is a table comparing the characteristics of Example). The solid electrolytic capacitors according to the example and the conventional example are both rated: 2V-100 μF, dimensions: 7.3 mm × 4.3 mm × 2.8 mm (vertical × horizontal × height), the number of stacked capacitor elements: 3 It is. The capacitance and tan δ (loss angle tangent) in Table 1 are 120 Hz, and ESR is a characteristic value measured at 100 kHz with an impedance analyzer. Further, LC (leakage current) in Table 1 is a value measured after 2 V is applied for 5 minutes.

  As is apparent from Table 1, the ESR and the like in the embodiment are significantly reduced as compared with the conventional example. This is because the cathode part is formed only by the solid electrolyte layer 3 to reduce the resistance of the cathode part, and a plurality of electrode extraction members 6 are connected to each of the solid electrolyte layer 3 via the conductive paste 8. Thus, it is considered that the contact area between the solid electrolyte layer 3 and the electrode lead member 6 is increased.

  As described above, according to the solid electrolytic capacitor according to the present embodiment, low ESR can be realized without using a lead frame having a special shape.

  Further, in the solid electrolytic capacitor according to the present invention, for example, even when the configuration shown in FIGS. 5 and 6 is used, low ESR can be similarly realized.

[Second Embodiment]
FIG. 5 shows a solid electrolytic capacitor according to the second embodiment. The solid electrolytic capacitor according to the present embodiment is obtained by adding a laminate 14 made of capacitor elements C4, C5, and C6 to the solid electrolytic capacitor according to the first embodiment. In the solid electrolytic capacitor according to this embodiment, the anode portion 6 included in one laminated body 13 and the plurality of electrode lead members 9 drawn from the laminated body 13 are connected to the surface side of the anode lead 11 and the cathode lead 10, respectively. The anode portion 6 included in the other laminate 14 and a plurality of electrode lead members 9 drawn from the laminate 14 are connected to the back surfaces of the anode lead 11 and the cathode lead 10, respectively. Thereby, the space on the back surface side of the cathode lead 10 and the anode lead 11 is effectively utilized, so that a large-capacity solid electrolytic capacitor can be manufactured.

  Although it is conceivable to increase the capacity by arranging two laminated bodies 13 and 14 on the front surface side (or back surface side) of the cathode lead 10 and the anode lead 11, such a configuration is maintained while maintaining the chip size. In order to achieve this, it is necessary to move the cathode lead 10 and the anode lead 11 from the center of the exterior resin 12 (in the case of FIG. 2, the cathode lead 10 and the anode lead 11 are moved to the lower side of the exterior resin 12). For this reason, the thickness of the moved exterior resin 12 becomes thin, and the exterior resin 12 is likely to be cracked or chipped. On the other hand, in the solid electrolytic capacitor according to the present embodiment, the cathode lead 10 and the anode lead 11 are arranged at the center of the exterior resin 12, and the laminates 13 and 14 are arranged so as to sandwich the cathode lead 10 and the anode lead 11. Yes. For this reason, since the thickness of the exterior resin 12 does not become extremely thin, it is possible to increase the capacity while reducing the occurrence of cracks and chips in the exterior resin 12.

[Third Embodiment]
FIG. 6 shows a solid electrolytic capacitor according to the third embodiment. The solid electrolytic capacitor according to the present embodiment is the same as the solid electrolytic capacitor according to the first embodiment except that the shapes of the cathode lead 10 and the anode lead 11 are different. In the solid electrolytic capacitor according to the present embodiment, since the back surfaces of the cathode lead 10 and the anode lead 11 are the mounting surfaces as shown in FIG. 6, the electrode lead member 9 and the anode portion 6 are replaced with the cathode lead 10 and the anode lead 11. It is preferable to use a welding method such as laser welding that does not leave a welding mark when connecting to each other.

  The preferred embodiments of the solid electrolytic capacitor according to the present invention have been described above, but the present invention is not limited to these configurations.

  For example, as the anode element 1, tantalum, niobium foil, or a sintered body of these metal powders can be used.

  In the above embodiment, the capacitor element is formed up to the solid electrolyte layer 3, but the same effect can be obtained even if a carbon layer is further formed on the solid electrolyte layer 3 with a carbon paste and connected to the electrode lead member 9. . In this case, the carbon layer functions as the conductive paste 8.

  In addition, the capacitor element can be stacked two or four or more. Of course, when it is not necessary to increase the capacity or when the above sintered body is used as the anode element 1, it is not always necessary to stack a plurality of capacitor elements.

  In addition, it is of course possible to make various design changes and modifications within the scope of the claims attached to this specification.

C, C1-6 Capacitor element 1 Anode element 2 Dielectric film 3 Solid electrolyte layer 4 Carbon layer 5 Silver layer 6 Anode portion 7 Scooping prevention material 8 Conductive paste 9 Electrode extraction member 10 Cathode lead 11 Anode lead 12 Exterior resin 13 , 14 Laminate

Claims (9)

A solid electrolytic capacitor formed by sealing a capacitor element formed with a solid electrolyte layer, which is an anode part on one side and a dielectric film and a cathode part, on the other side of an anode element made of a valve action metal,
A metal electrode lead member connected to the solid electrolyte layer via a conductive paste and containing carbon on the surface;
A cathode lead connected to the electrode lead member;
An anode lead connected to the anode part;
A solid electrolytic capacitor comprising: A laminated body is formed by laminating a plurality of capacitor elements with a solid electrolyte layer formed on one side of a flat anode element made of a valve metal on one side and a dielectric film and a cathode part on the other side in the same direction. And a solid electrolytic capacitor formed by sealing the laminate with an exterior resin,
A plurality of electrode lead members that are connected to each of the solid electrolyte layers included in the laminate via a conductive paste and that contain carbon on the surface drawn in the same direction from the laminate;
A cathode lead connected to the plurality of electrode lead members;
An anode lead connected to each of the anode parts included in the laminate;
A solid electrolytic capacitor comprising:   3. The solid according to claim 2, wherein each of the plurality of capacitor elements has a front surface and a back surface orthogonal to a direction of the lamination, and the front surface and the back surface are connected to different electrode lead members. Electrolytic capacitor. Comprising two laminates,
The anode part included in one laminate and the plurality of electrode lead members drawn from the one laminate are connected to the surface side of the anode lead and the cathode lead, respectively.
The anode part included in the other laminate and the plurality of electrode extraction members drawn out from the other laminate are connected to the back surfaces of the anode lead and the cathode lead, respectively. Item 4. The solid electrolytic capacitor according to Item 2 or 3. The conductive paste is made of carbon paste,
5. The solid electrolytic capacitor according to claim 1, wherein the electrode lead member is made of an aluminum foil containing carbon on the surface. A method for producing a solid electrolytic capacitor in which a capacitor element in which a solid electrolyte layer serving as an anode part on one side and a dielectric film and a cathode part is formed on the other side is sealed with an exterior resin. There,
Applying a conductive paste to a metal electrode lead member containing carbon on the surface;
Connecting the solid electrolyte layer and a portion of the electrode lead member coated with the conductive paste;
Connecting the electrode lead member and the cathode lead;
Connecting the anode part and the anode lead;
The manufacturing method of the solid electrolytic capacitor characterized by including this. A laminated body is formed by laminating a plurality of capacitor elements with a solid electrolyte layer formed on one side of a flat anode element made of a valve metal on one side and a dielectric film and a cathode part on the other side in the same direction. And a manufacturing method of a solid electrolytic capacitor formed by sealing the laminate with an exterior resin,
Applying a conductive paste to a plurality of electrode lead members made of metal containing carbon on the surface;
Each of the solid electrolyte layers included in the laminate is provided with a portion of the plurality of electrode lead members to which the conductive paste is applied so that the plurality of electrode lead members are drawn from the laminate in the same direction. Connecting, and
Connecting the plurality of electrode lead members to the cathode lead;
Connecting the anode part included in the laminate to the anode lead;
The manufacturing method of the solid electrolytic capacitor characterized by including this. A method for producing a solid electrolytic capacitor in which a capacitor element in which a solid electrolyte layer serving as an anode part on one side and a dielectric film and a cathode part is formed on the other side is sealed with an exterior resin. There,
Applying a conductive paste to the solid electrolyte layer;
Connecting the portion of the solid electrolyte layer coated with the conductive paste and a metal electrode lead member containing carbon on the surface;
Connecting the electrode lead member and the cathode lead;
Connecting the anode part and the anode lead;
The manufacturing method of the solid electrolytic capacitor characterized by including this. A laminated body is formed by laminating a plurality of capacitor elements with a solid electrolyte layer formed on one side of a flat anode element made of a valve metal on one side and a dielectric film and a cathode part on the other side in the same direction. And a manufacturing method of a solid electrolytic capacitor formed by sealing the laminate with an exterior resin,
Applying a conductive paste to the solid electrolyte layer;
The portion where the conductive paste of the solid electrolyte layer included in the laminate is applied so that a plurality of metal electrode lead members containing carbon on the surface are drawn in the same direction from the laminate, Connecting to each of the plurality of electrode lead members;
Connecting the plurality of electrode lead members to the cathode lead;
Connecting the anode part included in the laminate to the anode lead;
The manufacturing method of the solid electrolytic capacitor characterized by including this.

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