JP2004289142A - Laminated solid electrolytic capacitor and laminated transmission line element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated solid electrolytic capacitor and a laminated transmission line element, and these manufacturing method, which prevent the deformation of an anode part and the deterioration of element characteristics thereby, even in the case of a large number of lamination. <P>SOLUTION: In the laminated solid electrolytic capacitor element and the laminated transmission line element, the anode parts of adjacent elements are connected electrically and mechanically by a connector by conductive adhesives or a metal which can be soldered, through metal plates connected so as to pinch the upper and lower surfaces of the anode parts. On the other hand, cathode parts are connected electrically and mechanically by the conductive adhesives, or are connected electrically and mechanically by adhesive insulating sheet having a hollowed portion and the conductive adhesives with which the hollowed portion is filled, or are adhered by the adhesive insulating sheet and, after being laminated, are connected electrically by the conductive adhesives on the side surfaces of the cathode parts. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a multilayer solid electrolytic capacitor and a multilayer transmission line element.

  Conventionally, there is a solid electrolytic capacitor of this type shown in FIG. Referring to FIG. 10, a conventional solid electrolytic capacitor element 13 is obtained by roughening the surface of a metal plate made of a simple substance or an alloy thereof having a valve action such as aluminum, tantalum, niobium, and titanium by etching. Alternatively, an oxide film is formed on the surface of a valve metal body 15 formed by sintering and integrating a metal plate having a valve action and a metal powder having a valve action, and an insulating resin 17 is formed to form two regions. The solid electrolyte layer, the graphite layer, and the silver paste layer, or the solid electrolyte layer, the graphite layer, and the metal plating layer, or the solid electrolyte layer and the metal plating layer are sequentially formed in a region to be the cathode portion 19. ing.

  FIG. 11 is a sectional view showing a conventional transmission line element. Referring to FIG. 11, a conventional transmission line element 21 is obtained by roughening the surface of a metal plate made of a simple substance or a metal alloy having a valve action such as aluminum, tantalum, niobium, or titanium by etching. An oxide film is formed on the surface of a valve metal body 15 formed by sintering and integrating a metal plate having a valve action and a metal powder having a valve action, and an insulating resin 17 is formed to divide the region into three parts. It has a structure in which a solid electrolyte layer, a graphite layer and a silver paste layer, or a solid electrolyte layer, a graphite layer and a metal plating layer, or a solid electrolyte layer and a metal plating layer are sequentially formed in a region to be the central cathode portion 19. .

  In these solid electrolytic capacitor elements or transmission line elements, a plurality of solid electrolytic capacitor elements or transmission line elements are laminated in the thickness direction and electrically connected to each other in order to reduce the size, increase the capacity, and reduce the impedance. Is effective.

  A conventional laminating technique is disclosed in, for example, Patent Document 1. FIG. 12 is a sectional view showing a conventional multilayer solid electrolytic capacitor disclosed in Patent Document 1. As shown in FIG.

  Referring to FIG. 12, a conventional multilayer solid electrolytic capacitor 23 has a configuration in which a cathode portion 19 is connected with a conductive adhesive 25 and anodes are individually joined to a lead frame 27 by resistance welding.

  However, in the conventional technology, since the anode of each element is connected to the lead frame, when the number of stacked layers is increased, the deformation of the anode portion of the outermost stacked element becomes large, and the characteristics of the element deteriorate. And the limit was practically up to two laminations.

JP-A-11-135367

  Accordingly, it is an object of the present invention to provide a multilayer solid electrolytic capacitor and a multilayer transmission line element that prevent deformation of an anode portion and deterioration of characteristics due to the deformation even in a large number of layers.

  According to the present invention, a plurality of substantially flat solid electrolytic capacitor elements each having a plate-shaped anode portion forming one end and a cathode portion separated from the anode portion by an insulator are stacked and integrated. In the laminated solid electrolytic capacitor, having a conductive member connected to sandwich the two main surfaces of the anode portion of the solid electrolytic capacitor element, the conductive members of adjacent solid electrolytic capacitor elements, A multilayer solid electrolytic capacitor characterized by being electrically and mechanically connected and laminated by any one of a conductive adhesive, a solderable metal, and welding is obtained.

  According to the invention, in the multilayer solid electrolytic capacitor, the conductive member is any one of a metal plate, a metal plating layer, and a conductive paste layer. Is obtained.

  Further, according to the present invention, in any one of the multilayer solid capacitors, the cathode portions of adjacent solid electrolytic capacitor elements are connected and laminated by a conductive adhesive. An electrolytic capacitor is obtained.

  Further, according to the present invention, in any one of the multilayer solid capacitors, the cathode portion of the adjacent solid electrolytic capacitor element includes an adhesive insulating sheet having a hollow portion, and a conductive adhesive filling the hollow portion. And a laminated solid electrolytic capacitor characterized by being connected by an agent and laminated.

  Further, according to the present invention, in the multilayer solid capacitor, the cathode portions of adjacent solid electrolytic capacitor elements are laminated by being bonded by an adhesive insulating sheet, and the side surfaces of the cathode portion are electrically connected by a conductive adhesive. Thus, a multilayer solid electrolytic capacitor characterized in that electrical connection is made is obtained.

  Further, according to the present invention, in any one of the stacked solid electrolytic capacitors, the solid electrolytic capacitor element is a flat metal having a valve action whose surface is roughened, or on a valve action metal plate. An oxide film is formed on the formed sintered body made of the valve metal powder, a solid electrolyte layer is formed on a predetermined portion serving as a cathode, and a graphite layer, a silver paste layer, and a metal plating layer are formed on the solid electrolyte layer. And a multilayer solid electrolytic capacitor characterized by being formed with any one of the above.

  Further, according to the present invention, in any one of the stacked solid electrolytic capacitors, the solid electrolytic capacitor element is a flat metal having a valve action whose surface is roughened, or on a valve action metal plate. An oxide film is formed on a sintered body made of the formed valve metal powder, a solid electrolyte layer is formed on a predetermined portion serving as a cathode portion, and a metal plating layer is formed on the solid electrolyte layer. Is obtained.

  Further, according to the present invention, a plurality of transmission line elements having a substantially flat plate shape and having two anode portions forming both end portions and one cathode portion provided between the anode portions are stacked and integrated. A stacked transmission line element having a conductive member connected so as to sandwich two main surfaces of an anode portion of the transmission line element, wherein the conductive members of adjacent transmission line elements are electrically conductive. A laminated transmission line element characterized by being electrically and mechanically connected and laminated by an adhesive, a solderable metal or welding is obtained.

  Further, according to the present invention, in the multilayer transmission line element, the conductive member is made of any one of a metal plate, a metal plating layer, and a conductive paste layer. Is obtained.

  Further, according to the present invention, in the laminated transmission line element, the stacked transmission line element is characterized in that the cathode portions of adjacent transmission line elements are laminated by being connected by a conductive adhesive. can get.

  Further, according to the present invention, in the stacked transmission line element, the cathode portions of adjacent transmission line elements are connected by an adhesive insulating sheet having a hollow portion and a conductive adhesive filled in the hollow portion. Thus, a stacked transmission line element characterized by being stacked is obtained.

  Further, according to the present invention, in the stacked transmission line element, the cathode portions of adjacent transmission line elements are laminated by being adhered by an adhesive insulating sheet, and the side surfaces of the cathode portion are electrically connected by a conductive adhesive. A stacked transmission line element characterized in that the connection is established.

  Further, according to the present invention, in any one of the stacked transmission line elements, the transmission line element is formed on a flat metal plate having a valve action whose surface is roughened, or on a valve action metal plate. An oxide film is formed on the formed sintered body made of the valve metal powder, a solid electrolyte layer is formed on a predetermined portion serving as a cathode, and a graphite layer, a silver paste layer, and a metal plating layer are formed on the solid electrolyte layer. And a stacked transmission line element characterized by forming any one of the above.

  According to the invention, in any one of the stacked transmission line elements, the transmission line element is formed on a flat metal having a valve action whose surface is roughened, or formed on a valve action metal plate. The oxide film is formed on a sintered body made of the valve action metal powder, the solid electrolyte layer is formed on a predetermined portion serving as a cathode portion, and a metal plating layer is formed on the solid electrolyte layer. Thus, a laminated transmission line element can be obtained.

  Further, according to the present invention, a plurality of transmission line elements having a substantially flat plate shape and having two anode portions forming both end portions and one cathode portion provided between the anode portions are stacked and integrated. In a method for manufacturing a laminated transmission line element having a simplified structure, at least two transmission line elements each having a conductive member are prepared, and two main surfaces of an anode portion of the transmission line element are sandwiched therebetween. The conductive members are connected, and the conductive members of adjacent transmission line elements are electrically and mechanically connected to each other by a conductive adhesive, a solderable metal or welding, and laminated. Is obtained.

  Further, according to the present invention, a plurality of substantially flat solid electrolytic capacitor elements each having a plate-shaped anode portion forming one end and a cathode portion separated from the anode portion by an insulator are stacked. In a method of manufacturing a multilayer solid electrolytic capacitor having an integrated structure, at least two solid electrolytic capacitor elements each including a conductive member are prepared, and two main surfaces of the anode section of the solid electrolytic capacitor element are provided. The conductive members are connected so as to be sandwiched therebetween, and the conductive members of adjacent solid electrolytic capacitor elements are electrically and mechanically connected by one of a conductive adhesive, a solderable metal, and welding. And a method for manufacturing a multilayer solid electrolytic capacitor characterized by stacking.

  As described above, according to the present invention, even when the number of stacked layers is large, the stacked solid electrolytic capacitor and the stacked transmission line element which prevent the deformation of the anode portion and the deterioration of the element characteristics due to the deformation, and the manufacturing thereof. And methods can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1A to 9B.

(First Embodiment)
FIG. 1A is a cross-sectional view of a transmission line element according to the first embodiment, FIG. 1B is a cross-sectional view of a stacked transmission line element according to the first embodiment, and FIG. 2 is a first embodiment. FIG. 3 is a front view of a transmission line element according to another mounting method of a metal plate in the embodiment, FIG. 3 is a front view of a transmission line element according to another mounting method of a metal plate in the first embodiment, FIG. FIG. 5 is a plan view of a transmission line element before bending according to yet another method of attaching a metal plate in the first embodiment. 4 (b) is a side view of the transmission line element of FIG. 4 (a) viewed from the direction A, FIG. 4 (c) is a side view of the transmission line element after bending, and FIG. 5 (a) is according to the present invention. FIG. 5B is a cross-sectional view of the laminated transmission line element of the first embodiment using the adhesive insulating sheet of FIG. 5A. FIG. 6A is a plan view of an adhesive insulating sheet having no cutout according to the present invention, and FIG. 6B is a first embodiment using the adhesive insulating sheet of FIG. 6A. FIG. 4 is a cross-sectional view of a stacked transmission line element according to an embodiment.

  Referring to FIG. 1A, this cross-sectional view is drawn on a cross section of the transmission line element 29 whose overall appearance is substantially flat, passing through two anode portions and perpendicular to the main surface. . Here, a metal plate 31 is connected to the anode portion of the transmission line element 29 by resistance welding, ultrasonic welding, or the like so as to sandwich the anode portion from above and below. Note that the same reference numerals are used for substantially the same portions as those in FIG. 11 showing the conventional example.

  Referring to FIG. 1B, this cross-sectional view is drawn on a cut surface similar to that of FIG. 1A with respect to a laminated transmission line element 33 having a rectangular parallelepiped overall appearance. .

  In FIG. 1B, four transmission line elements 29 are stacked. Although the number of layers is four for the sake of explanation, four or more layers can be stacked in the same manner as in the first embodiment.

  The cathode portions 19 of the transmission line elements 29 are connected by a conductive adhesive 25. In the lowermost layer, an anode terminal 35 made of a metal plate at both ends and a cathode terminal 37 made of a metal plate at the center are connected by a conductive adhesive 25.

  At this time, the connection between the adjacent upper and lower anode portions (between the metal plates 31) is made by a connection body 39 made of a conductive adhesive or a solderable metal. The metal plate 31 used here is a metal having good conductivity such as copper. At this time, the surface to be welded to the anode may be plated with a metal having a low melting point such as tin.

  When the surfaces to which the metal plates 31 are connected to each other are connected by a conductive adhesive, the surfaces may be plated with a metal such as silver having good adhesion to the conductive adhesive. When connecting with a possible metal, the surface may be plated with a metal compatible with the metal.

  As a method of connecting the metal plate 31 to the anode, besides a method of connecting the anode by two metal plates so as to sandwich the anode from the upper and lower surfaces, a method of connecting the anode by the metal plate 31 bent as shown in FIG. There is also a method in which the anode part and the metal plate 31 are electrically connected by fitting each other as shown by an arrow 41 and performing ultrasonic welding and electric resistance welding. When the metal plate 31 thus bent is used, the cross-sectional shape at the anode portion is slightly different from FIG. 1A or FIG.

  Alternatively, as shown in FIG. 3, there is a method in which a strip-shaped metal plate 31 having a width substantially equal to the width of the anode portion is connected so as to protrude in the longitudinal direction, and then bent as shown by an arrow 43.

  Further, as shown in a plan view in FIG. 4A, a band-shaped metal plate 31 longer than the width of the anode portion is electrically connected by ultrasonic welding, electric resistance welding, or the like, and is a side view. As shown in FIG. 4 (b), as shown by an arrow 51, the anode part may be bent so as to wrap around the anode part, and a method shown in FIG. 4 (c) shown in a side view is also possible. Note that the arrow A in FIG. 4A indicates the direction in which the element is viewed when FIGS. 4B and 4C are drawn.

  The connection between the two vertically adjacent metal plates 31 can be made by welding in addition to the connection by the connecting body 39 made of a conductive adhesive or a solderable metal as described above.

  As the connection method between the cathode portions 19, the connection method using the conductive adhesive 25 has already been described. In addition to this, an adhesive insulating sheet having a hollow portion 45 having a predetermined shape as shown in FIG. A method of using 47 and filling the hollow portion 45 with a conductive adhesive to establish a connection between the cathode portions is also effective. As shown in the cross-sectional view of FIG. 5B, a stacked transmission line element 53 is formed.

  Further, as shown in FIG. 6A, the cathode portions are adhered to each other with an adhesive insulating sheet 55 having no hollow portion, and as shown in FIG. It is also possible to form a laminated transmission line element 57 by applying a conductive adhesive on a side surface parallel to the paper surface of FIG.

  As described above, the multilayer transmission line element has been described, but the multilayer solid electrolytic capacitor is also different in whether the anode portion is on both sides or one side, and the same structure can be applied.

(Second embodiment)
Next, a second embodiment of the present invention will be described.

  FIG. 7A is a sectional view of a transmission line element according to the second embodiment, and FIG. 7B is a sectional view of a stacked transmission line element according to the second embodiment.

  Referring to FIG. 7A, a metal plating layer 59 is formed on both main surfaces of the anode part of the transmission line element 61 on the anode part.

  Referring to FIG. 7B, the stacked transmission line element 63 has four transmission line elements 61 stacked. Although the number of laminations is four for the sake of explanation, four or more laminations are also possible in the same manner as in the second embodiment.

  The cathode portions of two vertically adjacent transmission line elements 61 are connected by the conductive adhesive 25. In the lowermost layer, an anode terminal 35 made of a metal plate at both ends and a cathode terminal 37 made of a metal plate at the center are connected by a conductive adhesive 25.

  On the other hand, the connection between the anode portions (between the metal plating layers 59) is made by a connection body 39 made of a conductive adhesive or a solderable metal. In addition, the connection between the metal plating layers 59 can be connected by welding.

  In the second embodiment, the same connection method between the cathode parts as in the first embodiment can be applied.

  The same structure as the multilayer transmission line element described in the second embodiment can be applied to the multilayer solid electrolytic capacitor.

(Third embodiment)
Next, a third embodiment of the present invention will be described.

  FIG. 8A is a cross-sectional view of a transmission line element according to the third embodiment, and FIG. 8B is a cross-sectional view of a stacked transmission line element according to the third embodiment.

  Referring to FIG. 8A, a conductive paste layer 65 is formed on both surfaces of the anode part of the transmission line element 67 used in the third embodiment.

  FIG. 8B shows a stacked transmission line element 69 according to the third embodiment in which four transmission line elements 67 are stacked. Although the number of laminations is four for the sake of explanation, four or more laminations are possible if the same as in the third embodiment.

  The cathodes of two vertically adjacent transmission line elements 67 are connected by the conductive adhesive 25. In the lowermost layer, an anode terminal 35 made of a metal plate at both ends and a cathode terminal 37 made of a metal plate at the center are connected by a conductive adhesive 25.

  On the other hand, the connection between the anode portions (between the conductive paste layers 65) is made by a connection body 39 made of a conductive adhesive or a solderable metal.

  Also in the third embodiment, the same connection method between the cathode portions as in the first embodiment and the second embodiment can be applied. The same structure as that of the third embodiment can be applied to the multilayer solid electrolytic capacitor.

(Fourth embodiment)
FIG. 9A is a sectional view of a solid electrolytic capacitor element according to the fourth embodiment, and FIG. 9B is a sectional view of a multilayer solid electrolytic capacitor according to the fourth embodiment.

  Referring to FIG. 9A, this cross-sectional view is drawn on a cut surface passing through one anode portion and perpendicular to the main surface of a solid electrolytic capacitor element 71 whose overall appearance is substantially flat. I have. Here, the metal plate 31 is connected to the anode of the solid electrolytic capacitor element 71 by resistance welding, ultrasonic welding, or the like so as to sandwich the anode from upper and lower surfaces. Note that the same reference numerals are used for substantially the same portions as those in FIG. 10 showing the conventional example.

  Referring to FIG. 9B, this cross-sectional view is drawn on a cut surface similar to FIG. 9A with respect to a multilayer solid electrolytic capacitor 73 having a rectangular parallelepiped overall shape. .

  In FIG. 9B, four solid electrolytic capacitor elements 71 are stacked. Note that, for the sake of explanation, the number of laminations is four, but four or more laminations are possible as in the present embodiment.

  The cathode portions 19 of the solid electrolytic capacitor elements 71 are connected by a conductive adhesive 25. In the lowermost layer, an anode terminal 35 made of a metal plate at both ends and a cathode terminal 37 made of a metal plate at the center are connected by a conductive adhesive 25.

  At this time, the connection between the adjacent upper and lower anode portions (between the metal plates 31) is made by a connection body 39 made of a conductive adhesive or a solderable metal. The metal plate 31 used here is a metal having good conductivity such as copper. At this time, the surface to be welded to the anode may be plated with a metal having a low melting point such as tin. When the surfaces to which the metal plates 31 are connected to each other are connected by a conductive adhesive, the surfaces may be plated with a metal such as silver having good adhesion to the conductive adhesive. When connecting with a possible metal, the surface may be plated with a metal compatible with the metal.

  As a method of connecting the metal plate 31 to the anode, besides a method of connecting the anode by two metal plates so as to sandwich the anode from the upper and lower surfaces, a method of connecting the anode by the metal plate 31 bent as shown in FIG. There is also a method in which the anode part and the metal plate 31 are electrically connected by fitting each other as shown by an arrow 41 and performing ultrasonic welding and electric resistance welding. When the metal plate 31 thus bent is used, the cross-sectional shape at the anode portion is slightly different from FIG. 9A or FIG. 9B, and is U-shaped.

  Alternatively, as shown in FIG. 3, there is a method in which a strip-shaped metal plate 31 having a width substantially equal to the width of the anode portion is connected so as to protrude in the longitudinal direction, and then bent as shown by an arrow 43.

  Further, as shown in a plan view in FIG. 4A, a band-shaped metal plate 31 longer than the width of the anode portion is electrically connected by ultrasonic welding, electric resistance welding, or the like, and is a side view. As shown in FIG. 4 (b), as shown by an arrow 51, the anode part may be bent so as to wrap around the anode part, and a method shown in FIG. 4 (c) shown in a side view is also possible.

  The connection between the two vertically adjacent metal plates 31 can be made by welding in addition to the connection by the connecting body 39 made of a conductive adhesive or a solderable metal as described above.

  As the connection method between the cathode portions 19, the connection method using the conductive adhesive 25 has already been described. In addition to this, an adhesive insulating sheet having a hollow portion 45 having a predetermined shape as shown in FIG. A method of using 47 and filling the hollow portion 45 with a conductive adhesive to establish a connection between the cathode portions is also effective. Note that a multilayer solid-state capacitor 73 similar to that shown in the cross-sectional view of the multilayer transmission line element 53 in FIG. 5B is formed.

  Further, as shown in FIG. 6A, the cathode portions are adhered to each other with an adhesive insulating sheet 55 having no hollow portion, and as shown in FIG. It is also possible to form a laminated solid electrolytic capacitor 73 by applying a conductive adhesive to a side surface parallel to the paper surface of FIG.

  As described above, the difference between the stacked transmission line element and the stacked solid electrolytic capacitor is whether the anode portion is on both sides or one side, and the same structure can be applied.

  As described above, in each of the first to fourth embodiments, a small, large-capacity, low-impedance solid electrolytic capacitor element or transmission line element is realized, and stress is not concentrated on the anode part. It has a structure.

  As described above, the multilayer solid electrolytic capacitor and the multilayer transmission line element according to the present invention can be used for a power supply circuit of a central information processing device of a personal computer (PC), such as a power supply circuit of an electronic device and an electric device. The present invention can be applied to a power supply capacitor, a backup device of various electronic devices or a mobile phone.

FIG. 2A is a cross-sectional view of a transmission line element according to the first embodiment, and FIG. 2B is a cross-sectional view of a stacked transmission line element according to the first embodiment. It is a front view of the transmission line element by the other mounting method of the metal plate in the first embodiment of the present invention. It is a front view of the transmission line element by the other attachment method of the metal plate in the first embodiment of the present invention. (A) is a plan view of the transmission line element according to the first embodiment before bending the transmission line element by yet another mounting method, and (b) is a view of the transmission line element of (a) viewed from the A direction. FIG. 3C is a side view of the transmission line element after bending. (A) is a plan view of an adhesive insulating sheet having a hollow portion according to the present invention, and (b) is a laminated transmission line element of the first embodiment using the adhesive insulating sheet of (a). FIG. (A) is a plan view of an adhesive insulating sheet having no cutout according to the present invention, and (b) is a laminated transmission line of the first embodiment using the adhesive insulating sheet of (a). It is sectional drawing of an element. (A) is a cross-sectional view of the transmission line element according to the second embodiment, and (b) is a cross-sectional view of the stacked transmission line element of the second embodiment. (A) is a cross-sectional view of the transmission line element according to the third embodiment, and (b) is a cross-sectional view of the stacked transmission line element of the third embodiment. (A) is a sectional view of a solid electrolytic capacitor element according to the fourth embodiment, and (b) is a sectional view of a multilayer solid electrolytic capacitor according to the fourth embodiment. It is sectional drawing of the conventional solid electrolytic capacitor element. It is sectional drawing of the conventional transmission line element. It is sectional drawing of the conventional laminated type solid electrolytic capacitor.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 13 Solid electrolytic capacitor element 15 Valve action metal body 17 Insulating resin 19 Cathode part 21 Transmission line element 23 Laminated solid electrolytic capacitor 25 Conductive adhesive 27 Lead frame 29 Transmission line element 31 Metal plate 33 Laminated transmission line element 35 Anode terminal 37 Cathode Terminal 39 Connector 41,43 Arrow 45 Cutout 47 Adhesive Insulating Sheet 51 Arrow 53 Laminated Transmission Line Element 55 Adhesive Insulating Sheet 57 Laminated Transmission Line Element 59 Metal Plating Layer 61 Transmission Line Element 63 Laminated Transmission Line Element 65 Conductive paste layer 67 Transmission line element 69 Laminated transmission line element 71 Solid electrolytic capacitor element 73 Laminated solid electrolytic capacitor

Claims (16)

  A multilayer solid electrolytic capacitor obtained by stacking and integrating a plurality of substantially plate-shaped solid electrolytic capacitor elements each having a plate-shaped anode portion forming one end and a cathode portion separated from the anode portion by an insulator. A conductive member connected so as to sandwich the two main surfaces of the anode portion of the solid electrolytic capacitor element, wherein the conductive members of adjacent solid electrolytic capacitor elements are electrically conductive adhesive, A multilayer solid electrolytic capacitor characterized by being electrically and mechanically connected and laminated by any one of a metal that can be attached and a weld.   2. The multilayer solid electrolytic capacitor according to claim 1, wherein the conductive member is any one of a metal plate, a metal plating layer, and a conductive paste layer.   3. The multilayer solid electrolytic capacitor according to claim 1, wherein said cathode portions of adjacent solid electrolytic capacitor elements are connected and laminated by a conductive adhesive.   3. The multilayer solid electrolytic capacitor according to claim 1, wherein the cathode portions of adjacent solid electrolytic capacitor elements are connected by an adhesive insulating sheet having a hollow portion and a conductive adhesive filled in the hollow portion. A multilayer solid electrolytic capacitor characterized by being laminated.   3. The multilayer solid electrolytic capacitor according to claim 1, wherein the cathode portions of adjacent solid electrolytic capacitor elements are laminated by being bonded by an adhesive insulating sheet, and are electrically connected by a conductive adhesive on a side surface of the cathode portion. 4. A multilayer solid electrolytic capacitor characterized by being connected.   The multilayer solid electrolytic capacitor according to any one of claims 1 to 5, wherein the solid electrolytic capacitor element is a plate-like metal having a valve action whose surface is roughened, or a valve action metal plate. An oxide film is formed on a sintered body made of a valve action metal powder formed in the above, a solid electrolyte layer is formed on a predetermined portion serving as a cathode portion, and a graphite layer, a silver paste layer and metal plating are formed on the solid electrolyte layer. A multilayer solid electrolytic capacitor characterized by forming any one of layers.   The multilayer solid electrolytic capacitor according to any one of claims 1 to 5, wherein the solid electrolytic capacitor element is a plate-like metal having a valve action whose surface is roughened, or a valve action metal plate. An oxide film is formed on a sintered body made of a valve action metal powder formed as described above, a solid electrolyte layer is formed on a predetermined portion serving as a cathode portion, and a metal plating layer is formed on the solid electrolyte layer. Characteristic multilayer solid electrolytic capacitor.   A stacked transmission line element in which a plurality of transmission line elements having a substantially flat plate shape and having two anode portions forming both ends and one cathode portion provided between the anode portions are stacked and integrated. A conductive member connected so as to sandwich the two main surfaces of the anode part of the transmission line element, wherein the conductive members of adjacent transmission line elements are connected by a conductive adhesive, a solderable metal, Alternatively, the stacked transmission line element is electrically and mechanically connected and stacked by welding.   9. The multilayer transmission line device according to claim 8, wherein the conductive member is made of one of a metal plate, a metal plating layer, and a conductive paste layer.   10. The stacked transmission line device according to claim 8, wherein the cathode portions of adjacent transmission line devices are connected and stacked by a conductive adhesive.   10. The stacked transmission line device according to claim 8, wherein the cathode portions of adjacent transmission line devices are connected by an adhesive insulating sheet having a hollow portion and a conductive adhesive filling the hollow portion. A laminated transmission line element characterized by being laminated.   10. The stacked transmission line device according to claim 8, wherein said cathode portions of adjacent transmission line devices are laminated by being bonded by an adhesive insulating sheet, and are electrically connected by a conductive adhesive on a side surface of said cathode portion. A stacked transmission line element characterized in that:   13. The laminated transmission line element according to claim 8, wherein the transmission line element is a plate-shaped metal having a valve action whose surface is roughened, or a valve action metal layer plate. An oxide film is formed on the sintered body made of the valve metal powder formed above, a solid electrolyte layer is formed on a predetermined portion serving as a cathode portion, and a graphite layer, a silver paste layer, and a metal layer are formed on the solid electrolyte layer. A laminated transmission line element, wherein the laminated transmission line element is formed by forming one of the plating layers.   The laminated transmission line element according to any one of claims 8 to 12, wherein the transmission line element is a plate-shaped metal having a valve action whose surface is roughened, or a valve action metal plate. An oxide film is formed on a sintered body made of a valve action metal powder formed as described above, a solid electrolyte layer is formed on a predetermined portion serving as a cathode portion, and a metal plating layer is formed on the solid electrolyte layer. Characteristic laminated transmission line element.   A laminated type having a structure in which a plurality of transmission line elements having a substantially flat plate shape and having two anode portions forming both ends and one cathode portion provided between the anode portions are stacked and integrated. In the method for manufacturing a transmission line element, at least two transmission line elements each having a conductive member are prepared, and the conductive members are connected so as to sandwich two main surfaces of an anode part of the transmission line element, The conductive members of adjacent transmission line elements are electrically and mechanically connected to each other by a conductive adhesive, a solderable metal or welding, and are laminated. Production method. A laminated structure having a structure in which a plurality of substantially flat solid electrolytic capacitor elements each having a plate-shaped anode part forming one end and a cathode part separated by an insulator are stacked and integrated. In the method for manufacturing a solid electrolytic capacitor, at least two solid electrolytic capacitor elements each including a conductive member are prepared, and the conductive member is sandwiched between two main surfaces of the anode section of the solid electrolytic capacitor element. Connected, the conductive members of adjacent solid electrolytic capacitor elements are electrically and mechanically connected and laminated by any one of conductive adhesive, solderable metal and welding. Of manufacturing a multilayer solid electrolytic capacitor to be manufactured.

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