electrolytic capacitor

Abstract

Disclosed is an electrolytic capacitor 100 comprising: a capacitor element 110 having a bottom surface 100B and an upper surface 100T and including an anode lead 112; an anode lead terminal 120 and a cathode lead terminal 130 which are electrically connected to the capacitor element 110; and an encapsulation resin 101. At least one of the anode lead terminal 120 and the cathode lead terminal 130 includes a terminal portion exposed on the bottom surface, and two anchor portions extending from the terminal portion and buried in the encapsulation resin. The terminal portion has two end sides along a direction D1 along which the anode lead 112 extends. The two anchor portions each include a rising portion rising from the end sides of the terminal portion toward the upper surface, and an extension portion extending and bending from an upper end of the rising portion.

Description

[Technical Field]

[0001] The present disclosure relates to electrolytic capacitors. [Background technology]

[0002] Electrolytic capacitors are installed in various electronic devices. Electrolytic capacitors typically include a capacitor element having an anode portion and a cathode portion, an anode lead terminal, a cathode lead terminal, and an exterior body that covers the capacitor element. The anode lead terminal is electrically connected to the anode portion, and the cathode lead terminal is electrically connected to the cathode portion.

[0003] Lead terminals of various shapes have been proposed in the past (for example, Patent Document 1). Patent Document 1 discloses an anode lead frame having an extension portion that serves to enhance the strength of adhesion to the molding portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-088718 Summary of the Invention [Problem to be solved by the invention]

[0005] Currently, there is a demand for increasing the terminal strength of electrolytic capacitors. In this situation, one of the objects of the present disclosure is to provide an electrolytic capacitor with high terminal strength. [Means for solving the problem]

[0006] One aspect of the present disclosure relates to an electrolytic capacitor having a bottom surface and an upper surface opposite to the bottom surface, the electrolytic capacitor including a capacitor element including an anode lead, an anode lead terminal and a cathode lead terminal electrically connected to the capacitor element, and an exterior resin disposed around the capacitor element, wherein at least one of the anode lead terminal and the cathode lead terminal includes a terminal portion exposed at the bottom surface and two anchor portions extending from the terminal portion and embedded in the exterior resin, and the terminal portion extends in a direction in which the anode lead extends. The end The two anchor portions of each teeth The terminal portion includes an upright portion that rises from the end side toward the upper surface, and an extension portion that bends and extends from the upper end of the upright portion. [Effects of the Invention]

[0007] According to the present disclosure, an electrolytic capacitor with high terminal strength can be obtained. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view schematically illustrating a configuration of an example of an electrolytic capacitor according to the present disclosure. [Figure 2] FIG. 2 is a perspective view schematically showing some members of the electrolytic capacitor shown in FIG. [Figure 3] 2 is a cross-sectional view schematically showing an anode lead terminal of the electrolytic capacitor shown in FIG. 1. [Figure 4] 2 is a cross-sectional view schematically showing a cathode lead terminal of the electrolytic capacitor shown in FIG. 1. [Figure 5] FIG. 2 is a perspective view schematically showing the bottom surface of the electrolytic capacitor shown in FIG. [Figure 6] FIG. 2 is a cross-sectional view schematically showing the electrolytic capacitor shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following describes embodiments of the present disclosure using examples, but the present disclosure is not limited to the examples described below. While specific numerical values ​​and materials are used as examples in the following description, other numerical values ​​and materials may be used as long as the effects of the present disclosure are obtained. Note that components other than those characteristic of the present disclosure may be those of known electrolytic capacitors.

[0010] (electrolytic capacitor) The electrolytic capacitor of the present disclosure has a bottom surface and a top surface opposite the bottom surface. Hereinafter, the bottom surface and the top surface may be referred to as the "bottom surface (B)" and the "top surface (T)." The electrolytic capacitor of the present disclosure includes a capacitor element including an anode lead, an anode lead terminal and a cathode lead terminal electrically connected to the capacitor element, and an exterior resin disposed around the capacitor element.

[0011] At least one of the anode lead terminal and the cathode lead terminal includes a terminal portion exposed on the bottom surface (B) and two anchor portions extending from the terminal portion and embedded in the exterior resin. Hereinafter, the lead terminal including the two anchor portions may be referred to as a "lead terminal (L)." The terminal portions are arranged along the direction D1 in which the anode lead extends. The end Two anchors of each teeth The terminal portion includes an upright portion that rises from the end side of the terminal portion toward the upper surface (T), and an extending portion that bends and extends from the upper end of the upright portion.

[0012] As described above, the anchor portion (the upstanding portion and the extending portion) is embedded in the exterior resin. Furthermore, the metal sheet constituting the lead terminal (L) is bent at two locations: at the boundary between the terminal portion and the upstanding portion, and at the boundary between the upstanding portion and the extending portion. With this configuration, the extending direction of the upstanding portion differs from the extending direction of the extending portion. Therefore, the anchor portion exerts a high anchoring effect. Therefore, according to the present disclosure, it is possible to prevent the lead terminal (L) from being separated from the exterior resin. In other words, according to the present disclosure, an electrolytic capacitor with high terminal strength and reliability can be obtained.

[0013] There is no particular limitation on the size of the anchor portion, as long as it is of a size that can provide an anchoring effect. Examples of the size of the anchor portion will be described in the first embodiment.

[0014] The two anchor portions included in one lead terminal (L) are usually symmetrical with respect to a plane that is perpendicular to the bottom surface (B) and passes through the central axis of the anode lead, but they do not have to be symmetrical. When the anode lead terminal and the cathode lead terminal each include an anchor portion, the shape of the anchor portion of the anode lead terminal and the shape of the anchor portion of the cathode lead terminal may be the same as or different from each other.

[0015] In the electrolytic capacitor of the present disclosure, it is preferable that the entire surface of the extension portion be in contact with the exterior resin. From another perspective, it is preferable that the anchor portion be not in contact with the capacitor element. These configurations provide a high anchor effect.

[0016] The two anchor portions may be bent in different directions (opposite rotation directions) at the boundary between the terminal portion and the upstanding portion and at the boundary between the upstanding portion and the extending portion. Here, "bending in different directions" means that the metal sheet constituting the lead terminal (L) is bent so that one surface (the surface on the upper surface (T) side) of the metal sheet forms a valley at the boundary between the terminal portion and the upstanding portion, and is bent so that the one surface forms a peak at the boundary between the upstanding portion and the extending portion. More specifically, the extending portions of the two anchor portions may be bent from the upper ends of the upstanding portions and extend in directions away from each other. That is, the extending portions of the two anchor portions may be bent from the upper ends of the upstanding portions and extend in directions away from each other in a direction perpendicular to the extension direction of the anode lead. An anchor portion having this configuration is easy to form. Furthermore, when an anchor portion having this configuration is used, it is easy to fill the exterior resin material (such as a molded resin). The two anchor portions may be bent in the same direction (same rotation direction) at the boundary between the terminal portion and the standing portion and at the boundary between the standing portion and the extending portion, respectively.

[0017] In the electrolytic capacitor of the present disclosure, each of the anode lead terminal and the cathode lead terminal may include two anchor portions. This configuration results in an electrolytic capacitor with particularly high terminal strength and reliability. Alternatively, only the anode lead terminal may include two anchor portions, or only the cathode lead terminal may include two anchor portions.

[0018] An example of the components of the electrolytic capacitor of the present disclosure will be described below.

[0019] (Anode lead terminal) The anode lead terminal may be formed by processing a single metal sheet using a known metal processing method. The material of the anode lead terminal may be any material that can be used as a material for the anode lead terminal of an electrolytic capacitor. For example, a known anode lead terminal material used in electrolytic capacitors may be used. The anode lead terminal may be formed by processing a metal sheet (including a metal plate and a metal foil) made of a metal (copper, copper alloy, etc.). The surface of the metal sheet may be plated with nickel, gold, or the like. The thickness of the metal sheet constituting the anode lead terminal is 25 mm ~200 mm range (e.g., 25 mm ~100 mm The range may be within the range of

[0020] The anode lead terminal may include an anode terminal portion exposed on the bottom surface (B) and a wire connection portion rising from the anode terminal portion toward the top surface (T). As described above, two anchor portions may extend from the anode terminal portion. The anode lead of the capacitor element is connected to the wire connection portion. The wire connection portion may have a wire receiving portion at its tip that is bent to be approximately parallel to the bottom surface (B). The wire receiving portion may be bent toward the front surface of the capacitor element, or may be bent in the opposite direction. Here, the front surface of the capacitor element means Anode Lead The end of the capacitor element where On the surfaceThe wire receiving portion allows for easy and reliable connection between the wire connection portion and the anode lead.

[0021] (cathode lead terminal) The cathode lead terminal may be formed by processing a single metal sheet using a known metal processing method. The material of the cathode lead terminal may be any material that can be used as a cathode lead terminal material for electrolytic capacitors. For example, a known cathode lead terminal material used in electrolytic capacitors may be used. The cathode lead terminal may be formed from a metal sheet exemplified as a material for an anode lead terminal.

[0022] The cathode lead terminal may include a cathode terminal portion exposed at the bottom surface (B) and a connection portion electrically connected to the cathode portion of the capacitor element. The cathode portion of the capacitor element is electrically connected to the cathode terminal portion via the connection portion. As described above, two anchor portions may extend from the cathode terminal portion.

[0023] (Capacitor element) The capacitor element is not particularly limited. The capacitor element may be a capacitor element used in a known solid electrolytic capacitor or a capacitor element having a similar configuration. The electrolytic capacitor of the present disclosure may include a plurality of capacitor elements. In this case, the plurality of capacitor elements may be element The anode portion is electrically connected to an anode lead terminal.

[0024] An example capacitor element includes an anode portion and a cathode portion. The anode portion includes an anode body having a dielectric layer formed on its surface and an anode lead, and the cathode portion includes an electrolyte layer and a cathode layer. The electrolyte layer is disposed between the dielectric layer formed on the surface of the anode body and the cathode layer. These components are not particularly limited, and components used in known solid electrolytic capacitors may be applied. Examples of these components are described below.

[0025] (anode body) The anode body may be, for example, a columnar (e.g., rectangular parallelepiped) porous sintered body obtained by sintering particles of the material. Examples of the particles include particles of valve metals, particles of alloys containing valve metals, and particles of compounds containing valve metals. These particles may be used alone or in combination of two or more. Examples of valve metals include titanium ( Ti ),tantalum( Ta ),niobium( Nb Alternatively, the anode body may be formed by roughening the surface of a substrate (such as a foil-shaped or plate-shaped substrate) containing a valve metal by etching or the like.

[0026] The anode part may be fabricated by the following method. First, a portion of the anode lead is embedded in metal powder, which is the material of the anode body, and the metal powder is pressure-molded into a columnar shape (e.g., a rectangular parallelepiped shape). The metal powder is then sintered to form the anode body. In this manner, an anode part including the anode body and the anode lead, part of which is embedded in the anode body, can be fabricated.

[0027] The dielectric layer formed on the surface of the anode body is not particularly limited and may be formed by a known method. For example, the dielectric layer may be formed by immersing the anode body in a chemical conversion solution to anodize the surface of the anode body. Alternatively, the dielectric layer may be formed by heating the anode body in an oxygen-containing atmosphere to oxidize the surface of the anode body.

[0028] (anode lead) The anode lead may be a wire (anode wire) made of metal. Examples of materials for the anode lead include the valve metals mentioned above, copper, aluminum, and aluminum alloys. A portion of the anode lead is embedded in the anode body, and the remaining portion protrudes from the anode body. The anode lead is usually rod-shaped, but may also be plate-shaped.

[0029] (electrolyte layer) The electrolyte layer is not particularly limited, and an electrolyte layer used in a known solid electrolytic capacitor may be applied. In this specification, the term "electrolyte layer" may be read as a "solid electrolyte layer," and the term "electrolytic capacitor" may be read as a "solid electrolytic capacitor." The electrolyte layer may be a laminate of two or more different electrolyte layers.

[0030] The electrolyte layer is disposed so as to cover at least a portion of the dielectric layer. The electrolyte layer may be formed using a manganese compound or a conductive polymer. Examples of conductive polymers include polypyrrole, polythiophene, polyaniline, and derivatives thereof. These may be used alone or in combination. The conductive polymer may also be a copolymer of two or more types of monomers. Note that a derivative of a conductive polymer refers to a polymer having a conductive polymer as its basic skeleton. For example, an example of a polythiophene derivative is poly(3,4-ethylenedioxythiophene).

[0031] A dopant may be added to the conductive polymer. The dopant can be selected depending on the conductive polymer, and known dopants may be used. Examples of dopants include naphthalene sulfonic acid, p -toluenesulfonic acid, polystyrenesulfonic acid, and salts thereof. An example electrolyte layer is formed using poly(3,4-ethylenedioxythiophene) (PEDOT) doped with polystyrenesulfonic acid (PSS).

[0032] The electrolyte layer containing the conductive polymer may be formed by polymerizing raw material monomers on the dielectric layer, or by applying a liquid containing the conductive polymer (and optionally a dopant) to the dielectric layer and then drying it.

[0033] (cathode layer) The cathode layer may be a conductive layer formed on the electrolyte layer, for example, a conductive layer formed so as to cover the electrolyte layer. The cathode layer may include a carbon layer formed on the electrolyte layer and a metal paste layer formed on the carbon layer. The carbon layer may be formed of a conductive carbon material such as graphite and a resin. The metal paste layer may be formed of metal particles (e.g., silver particles) and a resin, for example, a silver paste.

[0034] The cathode layer is electrically connected to a cathode lead terminal. The cathode layer may be electrically connected to the cathode lead terminal via a conductive member. The conductive member may be formed of metal particles (e.g., silver particles) and a resin, for example, a silver paste.

[0035] (exterior resin) The exterior resin is disposed around the capacitor element so that the capacitor element is not exposed on the surface of the electrolytic capacitor. Furthermore, the exterior resin insulates the anode lead terminal from the cathode lead terminal. The exterior resin may be a known exterior resin used in electrolytic capacitors. For example, the exterior resin may be formed using an insulating resin material used to seal the capacitor element. Examples of exterior resin materials include epoxy resin, phenolic resin, silicone resin, melamine resin, urea resin, alkyd resin, polyurethane, polyimide, and unsaturated polyester. The exterior resin may contain a substance other than resin (such as an inorganic filler). The electrolytic capacitor may include a case disposed on at least a portion of the surface of the exterior resin.

[0036] An example of an electrolytic capacitor according to the present disclosure will be specifically described below with reference to the drawings. The components described above can be applied to the components of the example electrolytic capacitor described below. Furthermore, the components of the example electrolytic capacitor described below can be modified based on the above description. That's all explanation did Matters, Explained belowIn the embodiments described below, components that are not essential to the electrolytic capacitor of the present disclosure may be omitted.

[0037] (Embodiment 1) FIG. 1 is a schematic perspective view of an electrolytic capacitor 100 according to a first embodiment. FIG. 2 is a schematic perspective view of the anode lead terminal 120 and the cathode lead terminal 130 of the electrolytic capacitor 100 shown in FIG. 1. FIG. 3 is a cross-sectional view of the anchor portion of the anode lead terminal 120. FIG. 4 is a cross-sectional view of the anchor portion of the cathode lead terminal 130. Note that in FIGS. 3 and 4, the position of the capacitor element 110 is indicated by a dotted line. FIG. 5 is a schematic bottom view of the electrolytic capacitor 100 shown in FIG. 1. In FIG. 5, the portion embedded in the exterior resin 101 is indicated by a dotted line. FIG. 6 is a schematic cross-sectional view of the electrolytic capacitor 100 shown in FIG. 1. The cross-sectional view in FIG. 6 is a cross-sectional view passing through the central axis of the anode lead (anode wire) 112. Note that, for ease of understanding, some components may be shown only by outline in the following figures. For example, in FIG. 1, the exterior resin 101 is shown only by outline, indicated by a dotted line.

[0038] The electrolytic capacitor 100 has a bottom surface 100 b and bottom 100 b The top surface opposite to the t Electrolytic capacitor 100 includes a capacitor element 110, an anode lead terminal 120, a cathode lead terminal 130, a conductive member 141, and an exterior resin 101. Anode lead terminal 120 and cathode lead terminal 130 are each electrically connected to capacitor element 110.

[0039] 2 and 5, the anode lead terminal 120 includes an anode terminal portion 121, a wire connection portion 122, and two anchor portions 123. The anode terminal portion 121 is attached to the bottom surface 100. b The wire connection portion 122 is exposed from the anode terminal portion 121 to the upper surface 100. tThe groove in the wire connection portion 122 for receiving the tip of the anode lead 112 is formed by resistance welding the anode lead 112 and the wire connection portion 122. The anode lead 112 and the wire connection portion 122 may be connected by welding, soldering, or the like.

[0040] 1 and 2, the two anchor portions 123 are respectively connected to the two end edges 121. e Extending from the two edges 121 e are end sides of the anode terminal portion 121, and are a pair of end sides along the direction D1 in which the anode lead 112 extends.

[0041] 1 and 3, the two anchor portions 123 are respectively attached to the end edges 121. e From top 100 t Standing part 123 a and, Standing Section 123 a An extension portion 123 that bends and extends from the upper end of the b In the example shown in the first embodiment, the two anchor portions 123 are respectively an anode terminal portion 121 and an upright portion 123. a The boundary with, and the upright part 123 a and extension 123 b Specifically, the anode lead terminal 120 is bent in a different direction at the boundary between the upper surface 100 and the lower surface 110. t The surface of the anode terminal 121 and the rising portion 123 a The boundary between the two is a valley fold, and the upright part 123 a and extension 123 b As a result, the extension portion 123 b is the standing part 123 a The extensions 123 of the two anchor portions 123 extend from the upper ends of the electrolytic capacitor 100 toward the outside of the electrolytic capacitor 100. b are the upright portions 123 a and extend in directions away from each other in a direction (D2) perpendicular to the direction (D1) in which the anode lead 112 extends. bThe direction of extension is the bottom surface 100 b and the angle therebetween may be in the range of -20° to 20°, for example.

[0042] The cathode lead terminal 130 includes a cathode terminal portion 131, a connection portion 132, and two anchor portions 133. The cathode terminal portion 131 is attached to the bottom surface 100. b The connection portion 132 is exposed from the anode terminal portion 121 to the upper surface 100. t The connecting portion 132 is electrically connected to the cathode portion 115 (cathode layer 117) described later via the conductive member 141. That is, the cathode terminal portion 131 is electrically connected to the capacitor element 110 via the connecting portion 132 and the conductive member 141. There are no particular limitations on the conductive member 141, and a known conductive member may be used. For example, the conductive member 141 may be formed from a metal paste or the like.

[0043] The two anchor portions 133 are respectively attached to the two end edges 131 e Extending from the two edges 131 e are end sides of the cathode terminal portion 131, and are a pair of end sides along the direction D1 in which the anode lead 112 extends.

[0044] 1 and 4, the two anchor portions 133 are respectively attached to the end edges 131. e From top 100 t Standing part 133 a and, Standing Section 133 a An extension portion 133 that bends and extends from the upper end of the b In one example shown in embodiment 1, The two anchor parts are Cathode terminal portion 131 and rising portion 133 a The boundary with, and the upright part 133 a and extension 133 b In other words, the extensions 133 of the two anchor portions 133 are bent in different directions at the boundary between the two. b are the upright portions 133 aand extend in directions away from each other in a direction (D2) perpendicular to the direction (D1) in which the anode lead 112 extends. b The direction of extension is the bottom surface 100 b and the angle therebetween may be in the range of -20° to 20°, for example.

[0045] Referring to FIG. 3, the anode terminal portion 121 bottom Extending portion 123 from the surface b of bottom The distance L1 to the surface is 50 mm or more (e.g. 75 mm More than 100 mm The distance L1 may be 50 mm or more (e.g. 75 mm More than 100 mm or more), the extension portion 123 Between b and the bottom surface 100b 3, the extension portion 123 is easily filled with the exterior resin 101. b The upper surface of the capacitor element 110 bottom Although it is located below the surface, the extension 123 b As long as the extension 123 does not interfere with the capacitor element 110, b may be at a higher position.

[0046] Referring to FIG. 4, extending from the surface of cathode terminal portion 131 to extension portion 133 b of bottom The distance L3 to the surface is 50 mm or more (e.g. 75 mm More than 100 mm or more), and mm ~500 mm range (e.g., 75 mm ~200 mm The extension portion 133 may be in the range of 133. b From the top surface of the capacitor element 110 bottom The distance L4 to the surface is 50 mm or more (e.g. 75 mm More than 100 mm or more), and mm ~500 mm range (e.g., 75 mm ~200 mm The distance L1 and the distance L3 may be within 50 mm or more (e.g. 75 mm More than 100 mm or more), the extension portion 133 Between b and the bottom surface 100b and Between the extending portion 133b and the capacitor element 110 This makes it easier to fill the exterior resin 101 into the cavity.

[0047] Edge 121 e From extension 123 b The horizontal distance W1 (distance along the direction D2) to the tip of the edge 131 e Extending portion 133 b The horizontal distance W2 (distance along the direction D2) to the tip of each mm or more (e.g. 75 mm More than 100 mm Horizontal distance W1 and W2 By setting the horizontal distances W1 and W2 in this range, a high anchor effect can be obtained. In addition, from the viewpoint of shape stability and workability, the horizontal distances W1 and W2 are set to 200 mm It may be more than this.

[0048] The shapes of the anode lead terminal 120 and the cathode lead terminal 130 described above are merely examples and are not limited to the above shapes. For example, either the anode lead terminal 120 or the cathode lead terminal 130 may not include an anchor portion. Furthermore, the connection portion of the cathode lead terminal 130 does not have to be located at the position shown in the figure, and does not have to have the shape shown in the figure, as long as it is electrically connected to the cathode portion 115 (cathode layer 117).

[0049] 6, capacitor element 110 includes an anode portion 111 and a cathode portion 115. Anode portion 111 includes an anode body 113 having a dielectric layer 114 formed on its surface, and an anode lead 112. Cathode portion 115 includes an electrolyte layer 116 disposed so as to cover dielectric layer 114, and a cathode layer 117. Cathode layer 117 includes, for example, a carbon layer formed on electrolyte layer 116 and a metal particle layer formed on the carbon layer. The metal particle layer is a layer formed using, for example, a metal paste.

[0050] As described above, anode portion 111 of capacitor element 110 is electrically connected to anode lead terminal 120, and cathode portion 115 of capacitor element 110 is electrically connected to cathode lead terminal 130. When electrolytic capacitor 100 is mounted on a substrate or the like of an electronic device, anode terminal portion 121 and cathode terminal portion 131 may be mounted by soldering them together.

[0051] An example of a method for manufacturing the electrolytic capacitor 100 is described below. First, the capacitor element 110, the anode lead terminal 120, and the cathode lead terminal 130 are prepared. There are no particular limitations on the method for manufacturing the capacitor element 110, and it can be manufactured by a known method. The anode lead terminal 120 and the cathode lead terminal 130 can be formed by a known metal processing method.

[0052] Next, the anode lead 112 and the anode lead terminal 120 are connected, and the cathode layer 117 and the cathode lead terminal 130 are connected. The anode lead 112 and the anode lead terminal 120 can be connected by welding (e.g., laser welding) or the like. The cathode layer 117 and the cathode lead terminal 130 can be connected, for example, by the following method. First, a metal paste that becomes the conductive member 141 is applied to the surface of the connection portion 132 of the cathode lead terminal 130 and / or the surface of the cathode layer 117. Next, the cathode layer 117 and the connection portion 132 are bonded together via the metal paste, and the metal paste is hardened to become the conductive member 141. In this manner, the cathode layer 117 and the cathode lead terminal 130 can be connected.

[0053] Next, the capacitor element is sealed with a material (e.g., a molding resin) for exterior resin 101. The sealing process can be performed by a known method. In this manner, electrolytic capacitor 100 can be manufactured. Note that other electrolytic capacitors of the present disclosure can also be manufactured by a similar manufacturing method. [Industrial Applicability]

[0054] The present disclosure can be used for electrolytic capacitors. [Explanation of symbols]

[0055] 100: Electrolytic capacitor 100B: Bottom 100T:Top surface 101: Exterior resin 110: Capacitor element 112: Anode lead 120: Anode lead terminal 121:Anode terminal part 121E, 131E: Edge 123, 133: Anchor part 123A: Standing part 123B: Extension part 130: Cathode lead terminal 131: Cathode terminal 131E: Edge 133A: Standing part 133B: Extension part D1, D2: Direction

Claims

1. An electrolytic capacitor having a bottom surface and a top surface opposite to the bottom surface, a capacitor element including an anode lead; an anode lead terminal and a cathode lead terminal electrically connected to the capacitor element; an exterior resin disposed around the capacitor element, the anode lead terminal includes a terminal portion exposed on the bottom surface and two anchor portions extending from the terminal portion and embedded in the exterior resin, the terminal portion has two end sides along the direction in which the anode lead extends, each of the two anchor portions includes an upright portion that rises from the end side of the terminal portion toward the upper surface and an extending portion that bends and extends from an upper end of the upright portion; only the exterior resin is present between the upper surface of the exterior resin and the upright portion and the extending portion; the entire surface of the extension portion is in contact with the exterior resin.

2. 2. The electrolytic capacitor according to claim 1, wherein the extension portion of one of the two anchor portions and the extension portion of the other of the two anchor portions are bent from the upper end of the upright portion and extend in directions away from each other.

3. The cathode lead terminal includes a terminal portion exposed on the bottom surface and two anchor portions extending from the terminal portion and embedded in the exterior resin, the terminal portion of the cathode lead terminal has two end sides along the extending direction of the anode lead, 3. The electrolytic capacitor according to claim 1, wherein each of the two anchor portions of the cathode lead terminal includes an upright portion that rises from the end edge of the terminal portion of the cathode lead terminal toward the top surface of the electrolytic capacitor, and an extending portion that extends in a bent state from an upper end of the upright portion.

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