TWI267883B - Solid electrolytic capacitor and method for producing the same - Google Patents

Abstract

This invention relates to a solid electrolytic capacitor using for various types of electric equipment. The invention provides the capacitor having excellent equivalent series resistance with high reliability and a method for producing the same. The capacitor comprises of a capacitor element laminate consisting of stacked capacitor elements, a positive port, and a negative port both which uphold the laminate, the element having a positive plate made of valve metal foil, a dielectric layer formed on the hole surface of the positive plate except an end portion, a solid electrolyte layer covering the dielectric layer and a negative layer covering the solid electrolyte layer, the negative layers being stacked and fixed on the negative port, the end portions being stacked on the positive port and fixed to two connecting portions of the positive port, wherein the positive port is made of a copper or a copper alloy, and the connecting portions are bent to wrap the stacked end portions, welding metal portion(s) being formed by applying a laser beam, which penetrates the surface areas of the stacked end portions and fusion bonds to the edge of the connecting portions on surface area at the top of the end portions.

Description

1267883 发明, invention description (invention description should be stated: the technical field, prior art, content, embodiment and drawings of the invention are briefly described) [Bright; ^ 贝贝 invention field The present invention relates to a solid used in various electronic machines Electrolytic 5 container and its manufacturing method. L. Prior Art 3 Background of the Invention A solid electrolytic capacitor having a small size, a large capacity, and an equivalent series resistance can be disclosed in Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. Fig. 10 is a perspective view showing the construction of the solid electrolytic capacitor of the prior art, and Fig. 9 is a cross-sectional view of the solid electrolytic capacitor covered with the resin. The solid electrolytic capacitor 100 includes an electric valley 7L laminated body 24 laminated with a multilayer capacitor element 21, an anode terminal 22 connected to the anode body front end portion 21a of the laminated body 24, and a cathode layer connected to the laminated body 24. Cathode terminal 23 of 21匕15. As shown in Fig. 10, the capacitor element 21 is formed by the dielectric oxide film 212, the solid electrolyte layer 217, and the cathode layer 218, and is surrounded by a portion other than the front end portion 21a of the anode||211 which is formed of the valve metal. . The anode body front end portion 21 and the cathode layer 218 of the electric junction 7 are laminated to the terminals. As shown in FIG. 8, the cathode layer 218 is disposed on the cathode flat portion Ua of the cathode terminal 23 having the cathode lead-out portion, and the cathode layer 218 formed on the side surface of the anode body 211 is perpendicularly connected to the cathode plane portion. The sides of the cathode on both sides of 23a are in contact with each other. The cathode layer 218 is adhered and fixed to the cathode flat portion 23a 20 1267883 by a conductive adhesive or the like, and is electrically connected to the cathode side surface portion 23b. The anode body front end portion 21a of the capacitor element 21 has a smaller thickness than the cathode layer 21b, and when a plurality of capacitor elements 21 are laminated, the anode body front end portions 21a are isolated. Therefore, as shown in Fig. 9, each anode body front end portion 521a is bent and the anode body front end portion 21a is tightly joined, whereby the respective anode body front end portions 21a can be electrically connected. The anode body distal end portion 21a that is closely coupled is disposed on the anode flat portion 22a of the anode terminal 22 having the anode lead-out portion, and is surrounded by the connecting portion 22b that protrudes from the anode flat portion 22a. On the other hand, the connecting portion 22b and the respective anode tip end portions 10a are fused and electrically connected to each other through the connecting portion 22b to the welded metal portion of the plurality of anode body leading end portions 26 constituting the laminated body. Moreover, the connecting metal portion is welded by irradiating the laser beam. The capacitor element laminated body 24 that connects the respective terminals is covered with an insulating exterior resin 27, and a solid electrolytic capacitor 15 as shown in Fig. 9 is formed, and the fused connection between the anode terminal 22 and the anode body leading end portion 21a is connected. The region of the surface of the portion 22b is irradiated with a laser beam, and after the irradiation portion is heated by the laser beam, the connection portion 22b and the plurality of stacked anode body end portions 21a are melted and welded. When the laser is welded, the fusion material 20 must be appropriately heated and melted. If the anode terminal 22 is made of copper or a copper alloy having a high thermal conductivity, since the heat generated by the laser is diffused by heat conduction, the irradiation portion cannot be sufficiently heated. Therefore, it is difficult to melt the connection portion 22b of the anode terminal 22 and the anode body front end portion 21a. In order to solve the above problem, if the intensity of the irradiated laser beam is increased, and the connection portion 22b or the anode body tip end portion is heated to a temperature higher than the melting point, the anode terminal 22 is excessively melted. The disadvantage of damaging the front end 邛 21a of the anode body. Therefore, the material of the anode terminal 22 is limited to a material having a low thermal conductivity such as an iron-based metal. Further, in another method for solving the above problem, it is conceivable to directly irradiate the anode body front end portion 21a of the laminate before the anode terminal end portion 21a is surrounded by the anode terminal 22, and perform _. (4) The anode terminal 22 is further surrounded by the anode body front end portion 21a, and the upper anode body front end portion (1) and the anode terminal 22 are dazzled. However, the front surface of the anode body of the upper anode body 21a It is not flat, so it is very difficult to make the anode body front end portion (1) and the anode end + 22# melt and join. If the welding is performed in such an unstable state, there is a fear that the equivalent series resistance (ESR) characteristics of the solid electrolytic capacitor are deteriorated and the reliability is lowered. C SUMMARY OF THE INVENTION The present invention is directed to solving such conventional problems, and an object of the present invention is to provide an anode terminal which is formed by using a copper alloy and which is fused to the anode terminal and the capacitor element by a thunder (four) connection. Solid electrolytic capacitor and its manufacturing method. Another object of the present invention is to provide a solid electrolytic capacitor which does not require melting of an anode terminal and which does not damage the front end portion of an anode body of a capacitive element, and a method of manufacturing the same. It is an object of the progress of the present invention to provide a solid electrolytic capacitor having an equivalent series resistance characteristic or excellent reliability and a method of manufacturing the same. 1267883. In the solid electrolytic capacitor of the present invention, the connection portion of the anode terminal and the front end portion of the anode body stacked by the capacitor element laminate surrounded by the curved connection portion pass through the surface region of the front end portion of the anode body and The surface of the front end portion of the uppermost anode body is fused with a laser beam at the edge of the connecting portion, and 5 is provided with a molten metal portion, and is integrally joined. In the present invention, since the welded metal portion penetrates the end portion of the stacked anode body and the edge of the joint portion is fused, the front end portion of the anode body and the joint portion can be reliably electrically connected. The solid electrolytic capacitor of the present invention reduces the loss of heat by simultaneously irradiating the laser beam on the surface area of the front end portion of the anode body of the uppermost one of the end portions of the connecting portion, and can reduce the loss of heat by the lightning The anode terminal and the anode body tip end portion made of a material having a high thermal conductivity such as copper or copper iridium are melted by a light beam, and excessive melting of the anode terminal or damage of the tip end portion of the anode body can be suppressed. Further, in the electrolytic capacitor of the present invention, since the front end portion can be made to be good and stable (4), it has a good (four) resistance characteristic and can obtain a highly reliable capacitor. The present invention relates to a method of manufacturing the above-described solid electrolytic capacitor, comprising the step of: connecting a connecting portion by bending an end portion of the connecting portion I on a surface region of a front end portion of the upper anode body; forming a dashed metal In the fourth part, the surface of the connecting portion and the surface of the uppermost anode body ί5 are irradiated with a laser beam to form a metallurgical portion. In the manufacturing method of the present invention, when the laser beam is irradiated to the end edge of the connecting portion, the heat dissipating path from the illuminating portion is cut by the end portion to suppress the heat dissipation, and the invention is lost. When the surface region of the end portion is irradiated with the laser beam, the surface region of the front end portion of the laminated anode body can be promoted to be melted. Therefore, even if an anode terminal made of a material having a high thermal conductivity such as copper or a copper alloy is used, the intensity of the laser beam when the welded metal portion is formed can be made small, and the anode serial interface terminal can be suppressed. In the manufacturing method according to the present invention, the anode terminal made of copper or copper metal having a high thermal conductivity can be welded to the tip end portion of the anode body in a good manner, so that it can be provided with good conditions. A capacitor with a series resistance characteristic and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in detail below with reference to the accompanying drawings. Fig. 1 is a perspective view showing a solid electrolytic capacitor of an embodiment of the present invention. 5 Fig. 2 is a side view showing the solid electrolytic capacitor of Fig. 1. The third (A) to (C) drawings show the steps of bending the joint portion of the anode terminal of the solid electrolytic capacitor of one embodiment of the present invention. Fig. 4 is a perspective view showing a solid electrolytic capacitor of another embodiment of the present invention. The fifth (A) to (C) drawings show the steps of bending the joint portion of the anode terminal of the solid electrolytic capacitor according to another embodiment of the present invention. Fig. 6 is a perspective view showing a solid electrolytic capacitor of a still further embodiment of the present invention. Fig. 7 is a view showing the solid state of the other embodiment of the present invention. Ϊ 267883 玖, the invention is a perspective view of an electrolytic capacitor. Figure 8 is a perspective view showing a conventional solid electrolytic capacitor. Fig. 9 is a front view showing a resin-sealed solid electrolytic capacitor. Fig. 1 is a cross-sectional view showing a capacitor element of a solid electrolytic capacitor. Fig. 5 is a detailed description of the embodiment of the vehicle. The solid electrolytic capacitor of the present invention comprises a capacitor element laminated body composed of a plurality of laminated capacitor elements. And a cathode 10 and a cathode terminal for supporting the laminate, wherein each of the capacitor elements comprises: an anode body composed of a metal foil of a wide metal; and the anode is formed in addition to the front end portion of the anode body a dielectric layer film on the surface of the body; a solid electrolyte surrounding the film; and a cathode layer surrounding the solid electrolyte; the capacitor element layering system stacks the cathode layers of the capacitor elements and fixes them on the cathode terminal, and stacks a plurality of A front end portion of the anode body is fixed to the two connection portions of the anode terminal, wherein the anode terminal is made of copper or a copper alloy, and the connection port of the anode terminal is surrounded by a curved layer. a front end portion of the anode body, and the solid electrolytic capacitor has a welded metal portion The beam is formed, and the number of passes through the multilayer 2〇 anode body surface area of the distal end portion, the upper portion of the anode body and the most significant dazzle blade edge portion of the upper surface of the connecting portion of the end region. A method for producing a solid electrolytic capacitor according to the present invention is a method for manufacturing the capacitor described above, and a method for manufacturing a capacitor, characterized in that the anode terminal is made of copper or a copper alloy, and includes a curved connection portion of 1266883 玖In the method of the invention, the connecting portion is bent such that the connecting portion surrounds the front end portion of the stacked anode body, and the edge of the connecting portion is disposed on a surface region of the front end portion of the upper anode body; and a welded metal is formed The step of irradiating the laser beam to the surface 5 of the front end portion of the connecting portion and the uppermost portion of the front end portion of the anode body to form a welded metal portion, which is laminated with the plurality of anode bodies The surface of the front end portion is fused to the end edge of the front end portion of the uppermost anode body. The capacitor of the present invention is disposed at the edge of the connection portion of the anode terminal, and 10 j is located in the surface region of the front end portion of the anode body of the capacitor element at the uppermost portion of the capacitor element laminate, and simultaneously irradiates the laser beam to form a molten metal portion. The end edge is a difficult position for heat dissipation, and the laser beam directly heats the front end portion of the anode body. Compared with the conventional one, the heat loss rate of the laser beam is reduced, and the laser beam irradiation portion can be heated more efficiently. . Thereby, in order to have 15 high thermal conductivity, a steel i steel alloy which is a material which is not suitable for the anode terminal can be used for the anode terminal. Moreover, since the heat of the laser beam is effectively utilized and the acceleration of the illuminating portion is improved, the intensity of the irradiated laser beam can be made small and the molten gold is formed.

^Can be reduced> When the splicing is connected, the anode terminal will excessively smear and damage the anode body, and the capacitor can be obtained with high reliability. Further, since the anode terminal and the anode body tip end portion can be simultaneously melted, the resin is not welded in an unstable state, and a capacitor having excellent efficiency and column resistance characteristics and high reliability can be obtained. X, the step of first welding the front end portion of the anode body can be omitted. 12 1267883 发明, DESCRIPTION OF THE INVENTION The anode terminal of the electric grain of the present invention is formed of copper or a copper alloy. The steel alloy contains a copper alloy containing alloying elements such as Sn, Si, Mg, Zn, Cr, and Fe. The end edge of the two connecting portions formed by the curved anode terminal is 'separated, and the i-finished metal portions can be at the front end of the uppermost anode body: 5 the end of the two connecting portions is fused on the surface area edge. In the capacitor crying of the present invention, since the end edge of the connecting portion is disposed on the surface area of the front end portion of the uppermost anode body, when the end edges of the two connecting portions are separated, the uppermost anode body is exposed by the gap The surface area of the front end portion can easily cause the laser beam to strike simultaneously at the end edge of the connecting portion and the front end portion of the anode body. Further, if one of the 10 portions of the weld gold is used, the time required for the splicing can be shortened, and the manufacturing time of the capacitor can be shortened. To use one of the welded metal portions to fuse the end of the connecting portion, - the distance between the two end edges is set to be smaller than the spot diameter of the laser beam. In particular, it is preferable to appropriately overlap the welded metal portion and the end edge and to stabilize the edge of the fusion to determine the separation distance. 15 The end edge of the two connecting portions of the anode terminal of the capacitor of the present invention is #' and the repeating metal portion on the second (four) can be dazzled by two connections on the surface area of the front end portion of the uppermost anode body. The edge of the ministry. By forming two welded metal portions, the ends can be surely fused, and a capacitor having a high equivalent series resistance characteristic can be obtained. — 0 The metal part of the welded metal can be appropriately changed by the size and structure of the capacitor. For example, it is possible to form one end edge with one of the molten metal portions, and to reliably fuse the end faces. In these capacitors, it is preferable to make 2, and ', and the distance between the turns is long. Further, in another example, a welded metal portion in which two end edges are fused may be formed along the edge portion of the connecting portion, and all of the edges of the invention may be combined with at least one welded metal portion. Strictly melted. The spacing between the two end edges of the capacitors should preferably be less than the laser spot diameter. The through hole or the notch of the capacitor of the present invention is formed on the top

a surface region of the connecting portion on the surface region of the front end portion of the anode body, and the 5 welded metal portion may melt the peripheral portion of the through hole or the edge of the notch at the surface region of the front end portion of the uppermost anode body instead of the connecting portion The above edge. Since the edge of the peripheral portion or the notch portion of the through hole is thicker than the edge of the connecting portion

Since the edge portion is long, when the welded metal portion is fused to the peripheral portion of the through hole or the edge of the notch portion, the joint strength can be improved, and a capacitor having an equivalent series electric resistance can be obtained. (Embodiment 1) In Fig. 1, the capacitor element 1 has the same structure as the capacitor n element of the conventional example shown in Fig. 1 . The anode 15 20 made of a valve metal material is sequentially laminated with a dielectric oxide film layer, a solid electrolyte layer, and a cathode layer lb on both sides and sides except the front end portion U.

The capacitor element laminated body 2 of the capacitor element i in which a plurality of layers are stacked is electrically connected to the two terminals at the pole tip end portion 1a and the cathode layer 1b. The cathode layer 1b of the laminated body 2 is disposed on the cathode tandem interface terminal *cathode flat, and further shaped by the cathode flat portion such as the cathode side portion 4b to support the cathode layer 1b side portion. The front end portion (4) of the anode body of the laminated body 2 is bent so that the laminated body such as the end portion 1 a close to the gentleman.睹 辨 辨 山 家 家 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 The end edge 31 of the two joint portions is connected to the upper end portion of the anode body at the uppermost portion of the upper surface of the anode body 1 1 "the surface region. Therefore, the end edges 31 are freed from the gap 32 and disposed oppositely. • "The core portion la and the connecting portion 3b are borrowed from the two end edges ^ ^ The welded metal portion 6 of the anode body front end portion 1a of the Beton laminate and the other stations are welded to each other. The laser beam having the spot diameter and the output is a beam, and is formed by irradiating the two end edges 31 and the front end portion U of the anode body. The capacitor element laminate 2 of the anode terminal 3 is covered with an insulating exterior resin 5 in a state where the cathode terminal 4 of the anode terminal 3 is exposed as an external electrode for power supply and exposed to the outer surface. Further, the anode terminal 3 and the cathode terminal 4 exposed by the resin 5 are bent along the outer resin by 5 % to form a surface mount type solid electrolytic capacitor. The method of manufacturing the solid electrolytic capacitor will be described below.

When the capacitor element 1 is formed, the anode body made of an aluminum foil is subjected to _ treatment and roughening on both sides of the front end portion. Then, a dielectric oxide film is formed by anodization on the treated surface of the anode body, and then the solid electrolytic layer and the cathode layer are sequentially laminated.

The anode terminal 3 and the cathode terminal 4 are connected to a hoop material in which terminals are provided at regular intervals. The cathode terminal 4 includes a cathode flat portion 4a and cathode side portions 4b provided on both sides of the cathode flat portion 4a, and a cathode layer 1b of the capacitor element laminated body 2 is disposed on the cathode flat portion 20a, and then the cathode The side surface portion 4b is formed as a portion where the curved portion and the flat portion 4 are connected, and is in contact with the cathode layer 1b of all of the laminated body 2, and the cathode side surface portion 4b and the cathode layer are electrically adhered and fixed by the conductive silver paste. The anode terminal 3 includes an anode flat portion 3a, a connecting portion 3b provided on both sides of the anode flat portion 15 1267883 and the invention description a, and an anode body front end portion la of the capacitor element laminated body 2 disposed on the anode flat portion 3a. Then, the connecting portion 3b is bent in accordance with the steps shown in Fig. 3(A) to (Fig. 3b. The connecting portion 3b is bent so that the connecting portion with the anode flat portion 3a faces the plane end portion ia of the flat surface 卩3a. The direction is slightly 90 with respect to the anode flat portion 3a. When t is a crucible, as shown in Fig. 3(A), the anode flat portion on which the anode body J terminal 配la is disposed is placed on the mounting table 71. After pressing the preliminary pressing type 7 having the groove portion of the heart JV shape, the connecting portion 3b is bent along the inclined portion of the groove portion. Then, as shown in Fig. 3(B), the preliminary pressing type 7 and the rectangular portion having the cross section are formed. After the completion of the pressing pattern 8 of the groove portion and the pressing of the pressing portion $ to make the connecting portion 3b more curved, as shown in the third figure (c), the connecting portion % is formed to surround the anode end portion u. The majority of the anode body front end portions 1a are pressed and formed into close mutual bonds when the child connecting portion 3b is formed. Then, The container element laminated body 2 is placed on the laser beam irradiation 襄 15 at a sub-determined position so that the end edge 31 of the two connecting portions 3b is disposed opposite to the surface region of the front end portion of the anode body, and the laser beam can be simultaneously irradiated The illumination intensity and the melting time of the laser beam are adjusted so that the laser beam of the end edge ..., the beam 24, and the front end portion of the laminated majority of the anode body is the same as the surface area. Then the laser beam is stopped. After the irradiation, the refining portion is cooled and solidified to form the refining metal portion 6. The refining metal portion 6 penetrates the surface region of the laminated anode end portion U and is on the surface of the uppermost anode body leading end portion la Two end edges 31 are fused in the region. The capacitor element laminate 2 of each terminal is fixed, and the portion of the anode terminal 3 and the cathode terminal 4 serves as an external electrode for power supply and is exposed at 16 1267883. It is covered by an insulating exterior resin 5. The anode terminal 3 and the cathode terminal 4 exposed by the outer casing 5 are bent along the exterior resin 5 to serve a surface mount type solid electrolytic capacitor. Also 'using the invention The method of manufacturing a fabricated steel using copper anode terminal 3 ° gold [Furukawa Denko (Corp.) · Name CDA C18045 (containing Cr_

Si Zn mouth gold)],! Lu, Lu, and iron solid electrolytic capacitors. Further, the DC resistance values between the front end portion and the anode terminal of the anode body of the capacitor are measured to obtain a judgment material for the equivalent series resistance characteristic. In the comparative example, the surface area of the connection portion of the terminal is irradiated with a laser beam to form a solid-state electrolytic capacitor manufacturing method of the smelting metal, and the DC resistance value is measured in the same manner. Further, 30 capacitors were produced and measured, and the number of DC resistance values of 5 η η Ω or less was shown in Table j. [Table 1] 15 columns of interface materials Copper Surface area refining 2/30 End edge welding 30/30 (Example)

As is apparent from Table 1, all of the solid electrolytic capacitors of the present invention using copper or a copper alloy as the material of the anode terminal have good equivalent series resistance characteristics. The use of aluminum, nickel, and iron in the anode terminal is based on the manufacturing method of the invention described in the specification of the invention, and the number of good products is increased by the conventional example, but the yield is higher than that of the steel or steel alloy. It is not good, and you can't get a capacitor with high reliability. (Embodiment 2) 5 This embodiment is a modification of the shape of the laser irradiation position and the shape of the anode terminal in the first embodiment, and the structure and the manufacturing method are the same as those of the embodiment, and the anode body front end portion of the layer body 2 is immersed. La is the front end of the curved anode body. The end portion tightly joins the adjacent anode body front end portions 1a. The anode body tip end portion 10h is disposed on the flat portion 9a of the anode serial interface terminal 9, and is surrounded by two connecting portions 9b connected to both ends of the flat portion 9a. The outer edge 91 of the wound connecting portion reaches the surface region or the upper end of the anode body leading end portion la of the uppermost layer of the laminated body 2, and the two end edges 91 are opposed to each other with a gap 92 interposed therebetween. ^15 The anode body tip portion U and the connecting portion 9b are connected to each other by the two end edges 91 and the anode body leading end portion la and penetrate the laminated anode body tip end portions by two welding metal portions U. And two dazzling metal parts u are formed in two non-repetitive positions. Further, the material metal portion is formed by irradiating a laser beam which has been adjusted to an appropriate spot diameter and output to the "edge 91 and the front end 20 of the anode body. Hereinafter, in the method for manufacturing an electrolytic capacitor of the present embodiment, a method of forming a positive electrode of the anode (four) will be described. The anode is used in the same manner as the anode comb terminal which is continuously disposed at predetermined intervals. The anode terminal 9 includes a flat portion 9a and a connection provided on both sides of the flat portion %. 18 1267883 玖, the invention describes the joint portion 9b. As shown in Fig. 4, the anode body front end of the capacitor element laminate 2 is disposed on the flat portion 9a. After the portion la, the connecting portion 9b is bent in accordance with the steps shown in the figure. The connecting portion 9b is curved so that the connecting portion with the flat portion 9a is disposed in the plane direction toward the anode body front end portion la of the plane portion 5%, and is slightly 9" from the flat portion 9a. Then, as shown in Fig. 5(A), the flat portion 9a of the anode serial interface terminal 9 on which the anode end portion 1a is disposed is placed on the mounting table 7i, and the groove having the inverted v shape is pressed. After the preliminary press pattern 12, the connecting portion 9b is bent along the inclined portion of the groove portion. Then, as shown in FIG. 5(B), the preliminary pressure type 13 is replaced with the preliminary pressure type 13 of the groove portion having the rectangular cross section of the stopper 14 on the bottom surface, and the pressing portion 13 is pressed to make the connecting portion 3b more curved. Then, as shown in Fig. 5(C), the front end portion of the anode body is surrounded by being formed into a joint portion. Further, a plurality of laminated anode body leading end portions 1a are pressed and deformed to be tightly coupled to each other when the connecting portion 9b is formed. In the forming of the joint 49a, since the end edges of the two joint portions are respectively brought into contact with the stopper 14 of the finished press type 13, the two end edges 91 have the same gap 92 as the width of the support member 14. Further, the majority of the anode body front end portions U are formed to be closely joined to each other when they are formed outside the joint portion. After the 〇, the capacitor element laminate 2 is placed in the laser irradiation device, and the position is determined so as to be placed in the edge 91 of the two connection portions disposed on the surface region of the front end portion u of the anode body. Shoot the beam. The irradiation intensity and the glaze time of the laser beam are adjusted to the laser illuminating portion of the meltable edge 91, and the surface area of the front end portion u of the majority of the anode body can be melted as described in the invention. Then, the laser beam is stopped, the molten portion is cooled and solidified, and the molten metal portion 11 is formed. Then, the laminated body 2 determines the position again to illuminate the laser beam on the other end edge 91 of the connecting portion 9b, and then irradiates the laser beam in the same manner as described above to form the molten metal portion 11. Further, the welded metal portion 5 11 penetrates the surface region of the laminated anode end portion 1a, and the two end edges 91 are fused on the surface region of the uppermost anode body leading portion 1a. In the example of the present invention, in order to facilitate the formation of the two welded metal portions 11 without repeating, the gaps between the two end edges 91 can be appropriately set by the stopper 14 of the completed press pattern 13. 10 (Embodiment 3) This embodiment is a modification of the shape of the laser irradiation position and the shape of the anode terminal in the embodiment. 'The other structure and manufacturing method are the same as those of the embodiment i. 15 20 The anode body front end of the laminated body 2 The portion of the front end portion u of the bent anode body is closely joined to the adjacent anode body end portion la. The anode body tip portion U is disposed on the flat (four) of the anode terminal 15 and is connected to both ends of the flat portion W. Two connecting portions (10) and (4) are formed in each connecting portion (10). The end rails 151 having a diameter (four) and a metal portion are formed. The end edge 151 of the connecting portion (10) of the winding body reaches the anode of the uppermost portion of the laminated body 2: the front end portion U In the surface region, the two end edges i5i are arranged to face each other with a gap 152 therebetween.

The anode body front end portion 1a and each of the connection portions i5b are connected to the peripheral portion of the through hole 18 fixed to the connection portion (5) to be grounded to the anode terminal portion 1^_金"17 (4) of the anode body front end portion ia layer. I 20 1267883发明In the Invention, the two welded metal portions 11 are formed at two non-repetitive positions. Further, the welded metal portion 17 is irradiated to the through holes 18 and the front end of the anode body by the laser beam having the adjusted spot diameter and output. The forming method and the welding method of the positive electrode 5 in the manufacturing method of the electrolytic capacitor of the present embodiment will be described below. The anode terminal 15 is an anode comb terminal which is continuously provided at a predetermined interval. The anode terminal 15 includes a flat surface. The portion 15a and the connecting portion 15b provided on both sides of the flat portion 15& and the connecting portion 15b'' define a through hole 18 having a smaller diameter than the dashed metal portion at a predetermined position. As shown in Fig. 6, The anode body front end portion la' of the capacitor element laminated body 2 is disposed on the 1" plane portion 15a, and then 'the same as the embodiment i', the connecting portion 15b is bent in accordance with the steps shown in the third (8) to (c), and is surrounded and fitted. Provided in the flat portion 15a The front end of the anode body of the laminated body 2 is a. The through hole 18 is disposed on the surface area of the upper end portion 1 a of the anode body. 15 The majority of the anode body end portion la of the laminated layer is formed when the connecting portion 3b is formed. Then, the electric grain element layer 2 is placed in the laser beam irradiation device, and the position is set so that the laser beam can be irradiated to the periphery of the through hole 18 of one of the connecting portions. The irradiation intensity and the correction time of the beam are adjusted to 20% of the laser beam irradiation portion of the peripheral portion of the through hole 18, and the surface region of the front end portion la of the plurality of anode bodies can be melted in the same manner. Then the laser beam is stopped. The molten portion is cooled and solidified to form a molten metal portion 17. Then, the laminated body 2 is again positioned to irradiate the laser beam to the peripheral portion of the other through hole 18, and irradiates the laser beam in the same manner as described above. 21 1267883 玖, description of the invention - the pure metal portion 17 is formed, and the surface portion of the metal portion 17 Μ through layer _ the front end portion la of the pole body is glazed on the surface region of the front end portion la of the uppermost anode body The peripheral portion of the through hole ι8 - The modification of the manufacturing method of the present embodiment is as shown in Fig. 7, after the connecting portion 15b of the through hole is not provided and the front end portion of the anode body is surrounded by the connecting portion 15b The through hole 18 is formed at an appropriate position, and the through hole 18 and the anode body front end portion la are dashed. The through hole 18 can be easily formed by a punching machine or the like. Since the modification can determine the position of the connecting portion 15b, the tenth pass can be determined. Since the position of the hole 18 is formed, the splicing metal portion 17 can be easily formed at the most appropriate position. Therefore, the solid electrolytic capacitor having the characteristics of the available electrolytic capacitor is better. The effect of the invention is the solid electrolytic capacitor of the present invention as described above. In the manufacturing method, the laser beam is simultaneously irradiated to the end edge of the connection portion of the anode serial interface terminal made of copper or a copper alloy, and the anode body front end of the capacitor element laminate body is formed at the same time. A steel active copper alloy of a highly conductive material is used at the anode terminal, thereby providing a solid electrolytic capacitor having excellent equivalent series resistance characteristics. Further, since the capacitor and the method for manufacturing the same according to the present invention are realized by the (4) and 2" metal portions, and the anode terminal and the anode body end portion are stably connected, it is possible to produce a solid electrolytic capacitor having excellent tandem resistance characteristics. 22 1267883 BRIEF DESCRIPTION OF THE DRAWINGS [Brief Description of the Drawings] Fig. 1 is a perspective view showing a solid electrolytic capacitor according to an embodiment of the present invention. Fig. 2 is a side view showing the solid electrolytic capacitor of Fig. 1. 5 (A) to (C) are steps showing a step of bending a connecting portion of an anode terminal of a solid electrolytic capacitor according to an embodiment of the present invention. Fig. 4 is a perspective view showing a solid electrolytic capacitor of another embodiment of the present invention. 5(A) to (Fig. 6 is a view showing a step of bending a connecting portion of an anode terminal of a solid electrolytic device according to another embodiment of the present invention. Fig. 6 is a view showing a still further embodiment of the present invention. A perspective view of a solid electrolytic capacitor. Fig. 7 is a perspective view showing a solid electrolytic capacitor of still another embodiment of the present invention. Fig. 8 is a perspective view showing a conventional solid electrolytic capacitor. Sectional view of a solid electrolytic capacitor which is not resin-sealed. Fig. 10 is a cross-sectional view of a capacitor element of a non-solid electrolytic capacitor. 1267883 玖, description of the invention [Signature table of main components of the drawing] 100.. Solid electrolytic capacitor 1 21, capacitor element 14 ... stopper 18 ···through hole la, 21a, 26... anode body front end portion lb, 218, 21b · · · Yin riding 2.24.. capacitor element laminated body 211 ... anode body 212.. Dielectric Oxide Film 217.. Solid Electrolyte Layer 27." Exterior Resin 3,9,15,22··Anode Terminal 31,91,151...End Edge 32,92,152...Void 3a,9a,15a , 22a··· anode plane part 3b, 9b, 1 5b, 22b···Connection part 4.10.16.23.. cathode terminal 4a, 10a, 16a, 23a·.·cathode plane part 4b, 10b, 16b, 23b···cathode side part 5...outer orange grease 6,11,17···welding metal parts 7,12...pre-formed type Ή...mounting table 8,13...completed molding

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Claims (1)

1267883 Picking up, patent application scope 1. A solid electrolytic capacitor comprising: a capacitor element laminated body composed of a plurality of laminated capacitor elements, and an anode terminal and a cathode terminal for supporting the laminated body, 5 10 15 20 wherein each capacitor The component includes: constituting an anode body from a metal foil of a valve metal; a dielectric layer film formed on a surface of the second electrode body except a front end portion of the anode body; a solid electrolyte surrounding the film; and surrounding a cathode layer of a solid electrolyte in which a cathode layer of each of the capacitor elements is laminated and solidified on the cathode terminal, and a plurality of anode body front end portions are stacked and fixed to the two terminals of the anode terminal And the front part is characterized in that the anode terminal is made of copper or a copper alloy, and the connection portion of the anode terminal is bent and the front end of the anode body is laminated, and the solid electrolytic capacitor has a dashed metal portion. , which is the surface area of the front end portion of the stack of the plurality of anode bodies of the above-mentioned anode body Hyun and the end of the connecting portion of the surface area of the anode upper edge of the front end portion of the upper most member. 2. If the capacitor of the application _ range 帛1 is separated, the end edges of the 2_ junctions of the aforementioned anode terminals are separated, and the i front material metal portions are on the surface area of the front end portion of the upper anode body. The edge of the dissolution department. According to the capacitor of the end of the two connection parts of the patent application scope, the anode terminal is separated, and the two or more of the two are not repeated. 25 1267883 Hand, Shen 5Rf Patent Arrow Explaining Moon 'J In the surface of the front end portion of the anode body of the uppermost portion, the edge portion of the two connecting portions is smelted. 4.: Apply for patent coverage! The capacitor of the present invention, wherein the through hole or the notch core is formed in a surface region of the connecting portion disposed on the surface region 5 of the front end portion of the anode body of the upper portion, and the front portion (four) is connected to the metal portion and the anode portion at the uppermost portion The peripheral portion of the front end portion is fused with the peripheral portion of the through hole or the notched portion edge 126 without the aforementioned edge of the connecting portion. 5. A solid electrolytic electric passenger crying system, raw + Λ electric yoke manufacturing method, which is used for manufacturing a capacitor element laminated body formed by laminating a plurality of capacitor elements, and an anode terminal for supporting the 10 body The cathode terminal is configured (4) the electrolytic capacitor is cried, and each of the capacitor elements includes: an electrode layer formed of a metal foil of a base metal and a front end portion of the anode body H (4); An ID body electrolyte surrounding the film; and a cathode layer surrounding the solid electrolyte, the capacitor element 15 is laminated, and a cathode layer of each of the capacitor elements is laminated and fixed to the cathode terminal, and a plurality of anode body tips are stacked And the method for manufacturing the capacitor is characterized in that the anode terminal is made of copper or a copper alloy, and includes: '° — — f# connection portion. In the step of bending the connecting portion, the connecting portion surrounds the front end portion of the stacked anode body, and the connecting portion is Edges disposed on the distal end portion of the upper surface area of the anode body; and a «step (iv) of the metal portion 'based on the connection portion of 261,267,883 The end edge and the uppermost surface area of the front end portion of the anode body are simultaneously: the laser beam is formed to form a hetero-metal portion, and the wire-bonding metal portion is a surface region of the front end portion of the stack of the plurality of anode bodies, 5 The edge of the 5 hai joint is fused on the surface area of the uppermost anode body. 6. The method of manufacturing a capacitor according to the fifth aspect of the invention, wherein the edge of the second connecting portion of the upper two poles is separated from the surface area of the frontmost front portion of the anode body. 10 7 . The method of manufacturing a capacitor according to the scope of claim 5 further includes a step of forming a through hole or a defect in a surface region of a portion disposed on a surface (4) of the front end portion of the uppermost anode body, and The m-beam is not irradiated on the edge of the connecting portion, and the surface region of the male end portion of the uppermost portion of the material is formed by the through-edge portion. 27