JP2019145696A - Electrolytic capacitor - Google Patents

Abstract

To reduce ESR of electrolytic capacitor.SOLUTION: An electrolytic capacitor includes a capacitor element having an anode body of porous sintered compact, a dielectric layer formed on the anode body, and a solid electrolyte layer formed on the dielectric layer, an anode wire planted from the planting face of the capacitor element, electrolyte, a bottomed metal case having an opening, and an insulating end-sealing component closing the opening. The metal case receives the capacitor element placed while directing the planting face toward the opening side, and the electrolyte, and the anode wire penetrates the end-sealing component and is derived from the opening.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electrolytic capacitor including an anode body that is a porous sintered body.

  In recent years, along with the reduction in size and weight of electronic devices, there has been a demand for small-sized and large-capacity high-frequency capacitors. For such a capacitor, for example, a capacitor element including a porous sintered body as an anode body is used. The capacitor element includes, for example, a porous sintered body as an anode body, a dielectric layer formed on the surface of the anode body, and a solid electrolyte layer formed on the surface of the dielectric layer. An anode wire is implanted in the anode body (Patent Document 1, etc.).

JP 2005-79357 A

  There is a need to further reduce the equivalent series resistance (ESR) of a capacitor having a solid electrolyte layer.

  A first aspect of the present invention is a capacitor comprising an anode body that is a porous sintered body, a dielectric layer formed on the anode body, and a solid electrolyte layer formed on the dielectric layer An element, an anode wire that is planted from the planting surface of the capacitor element, an electrolyte, a bottomed metal case having an opening, and an insulating sealing member that closes the opening. The capacitor element disposed with the planting surface facing the opening and the electrolytic solution are accommodated, and the anode wire penetrates the sealing member and is led out from the opening. It relates to an electrolytic capacitor.

  According to the present invention, the ESR of the electrolytic capacitor is reduced.

1 is a perspective view of an electrolytic capacitor according to an embodiment of the present invention. It is sectional drawing which cut | disconnected the electrolytic capacitor shown in FIG. 1 by the XX line. It is sectional drawing of the electrolytic capacitor which concerns on other one Embodiment of this invention. It is sectional drawing of the electrolytic capacitor which concerns on another one Embodiment of this invention.

  The electrolytic capacitor according to the present embodiment includes a capacitor element, an anode wire that is planted from the planting surface of the capacitor element, an electrolyte, a bottomed metal case having an opening, and an insulating sealing member that closes the opening. . The capacitor element includes an anode body that is a porous sintered body, a dielectric layer formed on the anode body, and a solid electrolyte layer formed on the dielectric layer. The capacitor element is accommodated in a metal case together with the electrolytic solution. The planting surface of the capacitor element is arranged so as to face the opening of the metal case sealed with the sealing member. The anode wire planted from the planting surface penetrates the sealing member and is led out from the opening.

  The electrolytic capacitor includes an electrolytic solution in addition to the solid electrolyte layer as an electrolyte. Therefore, the ESR of the electrolytic capacitor of this embodiment (hereinafter referred to as a combined electrolytic capacitor) is lower than that of a solid electrolytic capacitor having only a conventional solid electrolyte layer. Furthermore, since the electrolytic solution is housed in the metal case together with the capacitor element, leakage is suppressed.

  Since the electrolytic solution substantially functions as a cathode, the metal case that accommodates the electrolytic solution functions as a terminal for pulling out the cathode to the outside. Therefore, mounting on an electronic device becomes easy. Since the sealing member is insulative, a short circuit between the metal case and the anode wire is suppressed.

  The size of the combined electrolytic capacitor is not significantly different from that of a capacitor element used in a conventional sintered solid electrolytic capacitor, despite having a metal case and a sealing member. This is because a porous sintered body is used as the anode body. For example, most of the electrolytic solution can penetrate into the gaps derived from the holes provided in the porous sintered body inside the capacitor element. Therefore, it is not necessary to fill the periphery of the capacitor element with the electrolytic solution. In addition, the porous sintered body is excellent in hardness. Therefore, the sealing member that closes the opening of the metal case can be arranged in contact with the planting surface of the capacitor element. That is, according to the combined electrolytic capacitor, it is possible to realize a low ESR while securing the same capacity without excessively increasing the size as compared with the solid electrolytic capacitor.

  In a preferred embodiment, the sealing member is disposed in contact with the planting surface of the capacitor element. Thereby, the movement of the capacitor element inside the metal case is suppressed. Therefore, damage to the anode wire is suppressed. Moreover, since the movement of the electrolytic solution accompanying the movement of the capacitor element is also suppressed, the effect of suppressing leakage is also improved. Furthermore, since the sealing member is brought into contact with the planting surface, the inflow of air into the capacitor element is easily suppressed. Therefore, an increase in ESR due to oxidation of the solid electrolyte layer is suppressed. Usually, a gap is easily generated between the anode wire and the porous sintered body, and air may flow into the capacitor element from the gap. When oxygen in the atmosphere comes into contact with the solid electrolyte layer, it is oxidized and deteriorates, and ESR tends to increase.

  In another preferred embodiment, the sealing member is formed from a cured product of a thermosetting resin. In this case, the sealing member can be formed by, for example, directly applying or potting a sealing material containing a thermosetting resin to the planting surface and then curing the sealing material. Therefore, the process is extremely simple and can be easily sealed regardless of the shape of the opening of the metal case. Further, the gap between the sealing member and the anode wire can be filled without any gap. Therefore, the leakage of the electrolytic solution is further easily suppressed, and the inflow of air into the capacitor element is easily suppressed.

  The porous sintered body used as the anode body is usually a rectangular parallelepiped, and the planting surface is rectangular. Considering the size of the electrolytic capacitor to be obtained, it is preferable that the outer shape of the metal case accommodating the capacitor element is also a rectangular parallelepiped. In this case, the opening of the metal case is naturally rectangular. Here, a wound-type capacitor element obtained by winding a sheet-like anode and cathode is usually used for an electrolytic capacitor using an electrolytic solution. The metal case that houses the wound capacitor element is cylindrical, and the shape of the opening is circular. In this case, the sealing member is fixed by caulking to the opening end of the metal case. However, when the opening is rectangular, it is difficult to fix the sealing member to the metal case by caulking. According to this embodiment, even if the opening is rectangular, the sealing member can be easily fixed to the metal case.

  The winding type capacitor element is accommodated in the metal case in a direction in which the winding shaft extends from the opening. Therefore, when an external load is applied from the opening side, the anode and the cathode may be bent. Therefore, the wound-type capacitor element is usually accommodated in the case with a margin particularly on the opening side, and the sealing member is sealed so as not to contact the capacitor element.

  In another preferred embodiment, the sealing member covers at least a part of the end surface thereof together with the opening of the metal case. The electrolytic solution can leak through the gap between the inner surface of the metal case and the sealing member. By covering at least a part of the opening end surface with the sealing member, the leakage route through which the electrolytic solution leaks becomes long. Furthermore, since the leakage route includes a portion that bends from the inner surface of the metal case to the end surface of the opening, the leakage of the electrolytic solution is further easily suppressed.

  In another preferred embodiment, the sealing member covers at least a part of the outer surface at the end thereof together with the opening. This further increases the leakage route. In addition, the sealing member is strongly fixed by the metal case. Further, even when the sealing member and the metal case have different coefficients of thermal expansion, the sealing member is prevented from being detached from the metal case during the manufacturing process or during use. It is preferable that the sealing member is in contact with the planting surface and covers at least a part of the opening end surface and at least a part of the outer surface at the opening end in that the leakage route becomes longer.

  In another preferred embodiment, the capacitor element, the anode wire, and the sealing member housed in the metal case are covered with a resin sheathing body.

  In general, a solid electrolytic capacitor including a solid electrolyte layer is sealed (resin-sealed) by a resin sheathing body. However, when an electrolyte is used in combination as an electrolyte, it is difficult to prevent leakage of the electrolyte by resin sealing. In the present embodiment, since the capacitor element and the electrolytic solution are accommodated and the sealed metal case is resin-sealed, leakage of the electrolytic solution is prevented. Further, as described above, the size of the capacitor element is not greatly changed by the metal case and the sealing member. Therefore, the combined electrolytic capacitor of this embodiment can be used in place of a conventional solid electrolytic capacitor.

  A combined electrolytic capacitor according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a combined electrolytic capacitor according to this embodiment. FIG. 2 is a cross-sectional view of the electrolytic capacitor shown in FIG. 1 cut along line XX.

<Electrolytic capacitor>
The combined electrolytic capacitor 100 includes a capacitor element 10 (see FIG. 2), a metal case 30 that stores the capacitor element 10 and an electrolytic solution, a sealing member 40 that closes an opening of the metal case 30, and an anode wire 20. ing. The anode wire 20 is planted from the capacitor element 10, penetrates the sealing member 40, and is led out from the opening side of the metal case 30.

  As shown in FIG. 2, the capacitor element 10 includes an anode body 1 that is a porous sintered body, a dielectric layer 3 formed on the anode body 1, and a solid electrolyte layer formed on the dielectric layer 3. 4. The capacitor element 10 and the inner surface of the metal case 30 may be in contact or may not be in contact. In any case, since the electrolytic solution is accommodated in the metal case 30, the capacitor element 10 and the metal case 30 are electrically connected by the electrolytic solution, and the metal case 30 can function as a terminal for extracting the cathode to the outside. .

(Metal case)
As a material of the metal case 30, a metal such as aluminum, stainless steel, copper, iron, brass, nickel, titanium, or an alloy thereof can be used.

  The thickness of the metal case 30 is not particularly limited. The thickness of the metal case 30 may be 0.05 mm to 0.5 mm from the viewpoint of suppressing leakage of the electrolytic solution and downsizing. The shape of the metal case 30 is not particularly limited, but is preferably the same shape (similar shape) as the outer shape of the capacitor element 10 from the viewpoint of miniaturization. The opening of the metal case 30 may be rectangular.

(Sealing member)
The sealing member 40 closes the opening of the metal case 30. The sealing member 40 is made of an insulating material. The anode wire 20 and the metal case 30 are electrically insulated by the sealing member 40.

  The sealing member 40 may contain a resin material. As a resin material, the hardened | cured material of a thermosetting resin is mentioned, for example. Examples of the thermosetting resin include epoxy resin, phenol resin, silicone resin, melamine resin, urea resin, alkyd resin, polyurethane, polyimide, unsaturated polyester, and the like.

  The sealing member 40 is arrange | positioned so that the planting surface 10X of the capacitor | condenser element 10 may be contacted, for example. From the viewpoint of suppressing leakage, the sealing member 40 may be disposed so as to fill a space from the planting surface 10X to the opening end surface 30a. The sealing member 40 preferably covers at least a part of the opening end surface 30 a of the metal case 30. Thereby, the leakage of the electrolytic solution is more easily suppressed. The sealing member 40 may further cover at least a part of the outer surface of the open end 30b of the metal case 30. Thereby, the sealing member 40 is firmly fixed to the metal case 30. Therefore, even when the sealing member 40 and the metal case 30 have different coefficients of thermal expansion, the sealing member 40 is prevented from being detached from the metal case 30 during the manufacturing process or during use.

  The opening end 30b of the metal case 30 is a region including the opening end surface 30a and the vicinity of the opening end surface 30a. The opening end surface 30 a is a region that connects the inner surface and the outer surface of the metal case 30. The outer surface at the opening end 30b is, for example, a region that occupies 10% of the area of the outer surface of the metal case 30 from the opening end on the outer surface side. The sealing member 40 preferably covers at least a part of this region. The opening end is a boundary (edge) between the opening end surface 30a and the inner surface or the outer surface. The thickness of the sealing member 40 may not be constant.

(Anode wire)
The anode wire 20 is made of a conductive material. The material of the anode wire 20 is not specifically limited, For example, copper, aluminum, aluminum alloy etc. other than the said valve action metal are mentioned. The materials constituting the anode body 1 and the anode wire 20 may be the same or different. The cross-sectional shape of the anode wire 20 is not particularly limited, and is a circle or a shape obtained by crushing a circle (a shape composed of straight lines parallel to each other and two curves connecting ends of these straight lines. Hereinafter, referred to as a track shape. .), Oval, rectangular, polygonal and the like. The diameter of the anode wire 20 (long diameter in the case of a track shape and an elliptical shape) is not particularly limited, but is, for example, 0.1 mm to 1.0 mm.

(Electrolyte)
The electrolytic solution may be a non-aqueous solvent or a mixture of a non-aqueous solvent and an ionic substance (solute) dissolved therein. The non-aqueous solvent may be an organic solvent or an ionic liquid. As the non-aqueous solvent, for example, ethylene glycol, propylene glycol, sulfolane, γ-butyrolactone, N-methylacetamide and the like can be used.

  Examples of the solute include an organic salt in which at least one of an anion and a cation contains an organic substance. Examples of organic salts include mono (trimethylamine) maleate, mono (triethylamine) borodisalicylate, mono (ethyldimethylamine) phthalate, mono (1,2,3,4-tetramethylimidazolinium) phthalate, Mono (1,3-dimethyl-2-ethylimidazolinium) phthalate may be used.

(Capacitor element)
Capacitor element 10 includes anode body 1, dielectric layer 3 formed on anode body 1, and solid electrolyte layer 4 formed on dielectric layer 3.

  The anode body 1 is a porous sintered body obtained by sintering metal particles. Although the shape of the anode body 1 is not specifically limited, For example, it is a rectangular parallelepiped. Valve metal particles such as titanium (Ti), tantalum (Ta), and niobium (Nb) are used as the metal particles. One type or two or more types of metal particles are used for the anode body 1. The metal particles may be an alloy composed of two or more metals. For example, an alloy containing a valve action metal and silicon, vanadium, boron, or the like can be used. A compound containing a valve metal and a typical element such as nitrogen may be used. The alloy of the valve action metal preferably contains the valve action metal as a main component and contains 50 atom% or more of the valve action metal.

  A dielectric layer 3 is formed on the surface of the anode body 1. The dielectric layer 3 is made of, for example, a metal oxide. As a method for forming a layer containing a metal oxide on the surface of the anode body 1, for example, a method of anodic oxidation of the surface of the anode body 1 by immersing the anode body 1 in a chemical conversion solution, The method of heating in the atmosphere containing is mentioned. The dielectric layer 3 is not limited to the layer containing the metal oxide, and may have an insulating property.

The solid electrolyte layer 4 is formed so as to cover at least a part of the dielectric layer 3.
For example, a manganese compound or a conductive polymer is used for the solid electrolyte layer 4. Examples of the conductive polymer include polypyrrole, polythiophene, polyfuran, polyaniline, polyacetylene, polyphenylene, polyparaphenylene vinylene, polyacene, polythiophene vinylene, polyfluorene, polyvinyl carbazole, polyvinyl phenol, polypyridine, and derivatives of these polymers. Can be mentioned. These may be used alone or in combination of two or more. The conductive polymer may be a copolymer of two or more monomers. Among these, polythiophene, polyaniline, polypyrrole, and the like are preferable in terms of excellent conductivity. Of these, polypyrrole is preferred because of its excellent water repellency.

  The solid electrolyte layer 4 may be composed of two or more solid electrolyte layers. In this case, the composition and formation method of the conductive polymer used for each layer may be different.

  A conductive layer 5 may be formed between the solid electrolyte layer 4 and the inner surface of the metal case 30 (see FIG. 3). The conductive layer 5 plays a role of pulling out the cathode to the outside together with the metal case 30. The resistance is lowered by the conductive layer 5. The conductive layer 5 may be interposed at least at a part between the solid electrolyte layer 4 and the inner surface of the metal case 30. FIG. 3 is a cross-sectional view of the electrolytic capacitor according to the present embodiment.

  The conductive layer 5 has, for example, at least one of a carbon layer and a metal (for example, silver) paste layer. The carbon layer is composed of a composition containing a conductive carbon material such as graphite. A metal paste layer is comprised by the composition containing silver particle and resin, for example. When the conductive layer 5 includes both the carbon layer and the metal paste layer, for example, after forming the carbon layer so as to cover at least part of the solid electrolyte layer 4, the metal paste layer so as to cover at least part of the carbon layer. Form. In addition, the structure of the conductive layer 5 is not restricted to this, What is necessary is just a structure which has electroconductivity. The conductive layer 5 is preferably not formed at least around the anode wire 20 on the planting surface 10X. This is to prevent a short circuit.

(Resin exterior)
As shown in FIG. 4, the combined electrolytic capacitor 100 may include a resin sheathing body 70 that covers the capacitor element 10, the anode wire 20, and the sealing member 40 accommodated in the metal case 30.

  The combined electrolytic capacitor 100 including the resin sheathing body 70 is electrically connected to the anode lead terminal 50 electrically connected to the anode body 1 through the portion led out from the capacitor element 10 of the anode wire 20, and the metal case 30. A cathode lead terminal 60 connected to the terminal.

  A part of the anode lead terminal 50 is sealed with a resin sheathing body 70, and the remaining part is exposed from an arbitrary main surface of the resin sheathing body 70. A part of the cathode lead terminal 60 is sealed with a resin sheathing body 70, and the remaining part is exposed from the same main surface as the anode lead terminal 50 of the resin sheathing body 70. The exposed portion of each terminal on the main surface is used for solder connection with a substrate (not shown) on which the combined electrolytic capacitor 100 is to be mounted.

  The combined electrolytic capacitor 100 including the resin outer package 70 includes a metal case 30 inside, and the appearance and outer shape thereof are the same as those of a sintered solid electrolytic capacitor that does not include a conventional electrolytic solution. Therefore, the combined electrolytic capacitor according to this embodiment can be used in place of a conventional product.

  The resin sheathing body 70 is made of an insulating material, and electrically insulates the anode lead terminal 50 and the cathode lead terminal 60 from each other. Similar to the sealing member 40, the resin sheathing body 70 may include a cured product of a thermosetting resin. The resin armor 70 and the sealing member 40 may be formed of the same material. This is because even when the combined electrolytic capacitor 100 is heated, the interface peeling between the resin sheathing body 70 and the sealing member 40 hardly occurs.

(Anode lead terminal)
The anode lead terminal 50 is electrically connected to the anode body 1 through the anode wire 20. The material of the anode lead terminal 50 is not particularly limited as long as it is electrochemically and chemically stable and has conductivity, and may be a metal or a nonmetal. The shape is not particularly limited, and is, for example, a flat plate shape. In this case, the thickness of the anode lead terminal 50 (distance between the main surfaces of the anode lead terminal 50) is preferably 25 to 200 μm and more preferably 25 to 100 μm from the viewpoint of reducing the height.

  The anode lead terminal 50 may be joined to the anode wire 20 by a conductive adhesive or solder, or may be joined to the anode wire 20 by resistance welding or laser welding. The conductive adhesive is, for example, a mixture of a thermosetting resin and carbon particles or metal particles.

(Cathode lead terminal)
The cathode lead terminal 60 is electrically connected to the metal case 30. The material of the cathode lead terminal 60 is not particularly limited as long as it is electrochemically and chemically stable and has conductivity, and may be a metal or a nonmetal. The shape is not particularly limited, and is, for example, a flat plate shape. In this case, the thickness of the cathode lead terminal 60 is preferably 25 to 200 μm and more preferably 25 to 100 μm from the viewpoint of reducing the height. The cathode lead terminal 60 is joined to the metal case 30 via, for example, a conductive adhesive.

An example of the method for manufacturing the electrolytic capacitor according to this embodiment will be described.
≪Method for manufacturing electrolytic capacitor≫
(1) Production process of anode body The metal particles and the anode wire 20 are placed in a mold so that a part of the anode wire 20 is embedded in the metal particles, pressed, and then sintered in vacuum. Anode body 1 in which a part of anode wire 20 is embedded in the porous sintered body is produced. The pressure at the time of pressure molding is not specifically limited, For example, it is about 10-100N. If necessary, the metal particles may be mixed with a binder such as polyacrylic carbonate.

(2) Dielectric Layer Formation Step Dielectric layer 3 is formed on anode body 1. Specifically, the anode body 1 is immersed in a chemical conversion tank filled with an aqueous electrolytic solution (for example, phosphoric acid aqueous solution), and a portion from which the anode wire 20 is led out is connected to the anode body of the chemical conversion tank. By performing oxidation, the dielectric layer 3 made of an oxide film of a valve metal can be formed on the surface of the anode body 1. The electrolytic aqueous solution is not limited to a phosphoric acid aqueous solution, and nitric acid, acetic acid, sulfuric acid, and the like can be used.

(3) Formation process of solid electrolyte layer In this embodiment, the formation process of the solid electrolyte layer 4 containing a conductive polymer is demonstrated.
The solid electrolyte layer 4 containing a conductive polymer is, for example, a method of impregnating a monomer or oligomer into the anode body 1 on which the dielectric layer 3 is formed, and then polymerizing the monomer or oligomer by chemical polymerization or electrolytic polymerization. Alternatively, the anode body 1 on which the dielectric layer 3 is formed is impregnated with a conductive polymer solution or dispersion and dried to form at least part of the dielectric layer 3.

(4) Formation process of conductive layer A conductive layer 5 composed of a carbon layer and a metal paste layer is formed by sequentially applying a carbon paste and a metal paste on the surface of the solid electrolyte layer 4.
Thereby, the capacitor element 10 including the anode wire 20 is obtained.

(5) Housing process in metal case Capacitor element 10 is housed in metal case 30 together with the electrolyte.
The electrolytic solution may be stored in the metal case 30 in advance and the capacitor element 10 may be stored therein, or the capacitor element 10 may be stored in the metal case 30 in advance and the electrolytic solution may be dropped. Alternatively, the capacitor element 10 may be impregnated with an electrolytic solution before being accommodated in the metal case 30.

  Next, the material resin of the sealing member 40 is applied to the planting surface 10X. The material resin may be applied to the extent that it overflows from the metal case 30. The material resin overflowing from the metal case 30 covers at least a part of the open end 30b together with the planting surface 10X. In this state, the material resin is cured.

  The viscosity of the material resin is not particularly limited. The viscosity at 20 ° C. measured according to JIS Z 8803 of the material resin may be, for example, 1 mPa · s or more. If the viscosity of the material resin is within this range, even when there is a gap between the capacitor element 10 and the metal case 30, the material resin can be prevented from entering the gap.

  A mold surrounding the opening end 30b may be disposed in the vicinity of the opening of the metal case 30, and the mold may be filled with the material resin. Also in this case, at least a part of the planting surface 10X and the open end 30b is covered with the material resin. In this state, the material resin is cured.

  The metal paste layer may be formed after the capacitor element 10 is inserted into the metal case 30 and before the opening is sealed. For example, the capacitor element 10 in which the dielectric layer 3, the solid electrolyte layer 4, and the carbon layer are formed is inserted into a metal case 30 that contains a metal paste. The metal paste is spread between the capacitor element 10 and the inner surface of the metal case 30 to form a metal paste layer.

(6) Joining process of anode lead terminal The anode wire 20 planted from the anode body 1 is joined to the anode lead terminal 50 by laser welding, resistance welding or the like.

(7) Joining Step of Cathode Lead Terminal The cathode lead terminal 60 is joined to the metal case 30 via a conductive adhesive.

(8) Resin Sealing Step with Resin Armor Body Next, the metal case 30 containing the capacitor element 10 and the electrolytic solution and sealed, the anode wire 20, and the resin (material of the resin armor body 70. For example, not yet used. (Curing thermosetting resin and filler) are housed in a mold, and the metal case 30 and the anode wire 20 are resin-sealed with the resin sheathing body 70 by a transfer molding method, a compression molding method, or the like. At this time, at least a part of the anode lead terminal 50 and the cathode lead terminal 60 is exposed from the mold. The molding conditions are not particularly limited, and the time and temperature conditions may be appropriately set in consideration of the curing temperature of the thermosetting resin used.
By the above method, the combined electrolytic capacitor 100 including the resin outer package 70 is manufactured.

  Since the electrolytic capacitor according to the present invention has high quality, it can be used for various applications.

DESCRIPTION OF SYMBOLS 100: Combined type electrolytic capacitor 10: Capacitor element 10X: Planting surface 1: Anode body 3: Dielectric layer 4: Solid electrolyte layer 5: Conductive layer 20: Anode wire 30: Metal case 30a: Open end surface 30b: Open end 40: Sealing member 50: Anode lead terminal 60: Cathode lead terminal 70: Resin sheath

Claims (8)

A capacitor element comprising: an anode body that is a porous sintered body; a dielectric layer formed on the anode body; and a solid electrolyte layer formed on the dielectric layer;
An anode wire planted from the planting surface of the capacitor element;
An electrolyte,
A bottomed metal case with an opening;
An insulating sealing member that closes the opening;
The metal case accommodates the capacitor element arranged with the planting surface facing the opening, and the electrolytic solution,
The electrolytic capacitor, wherein the anode wire penetrates the sealing member and is led out from the opening.   The electrolytic capacitor according to claim 1, wherein the sealing member is in contact with the planting surface.   The electrolytic capacitor according to claim 1, wherein the sealing member includes a cured product of a thermosetting resin.   The said sealing member is an electrolytic capacitor as described in any one of Claims 1-3 which covers at least one part of the end surface of the said opening with the said opening.   The said sealing member is an electrolytic capacitor as described in any one of Claims 1-4 which covers at least one part of the outer surface in the edge part of the said opening with the said opening.   The electrolytic capacitor according to claim 1, wherein the opening has a rectangular shape.   The electrolytic capacitor according to claim 1, further comprising a conductive layer between the solid electrolyte layer and an inner surface of the metal case. The electrolytic capacitor as described in any one of Claims 1-7 provided with the resin exterior body which covers the said capacitor | condenser element accommodated in the said metal case, the said anode wire, and the said sealing member.

Images