Solid electrolytic capacitor

Abstract

The utility model provides a solid electrolytic capacitor. This solid electrolytic capacitor is provided with: a capacitor element having an anode part and a cathode part; an anode terminal (20) electrically connected to the anode part; a cathode terminal (30) electrically connected to the cathode part; and an exterior resin covering the capacitor element, the anode terminal (20), and the cathode terminal (30). The anode terminal (20) and the cathode terminal (30) each have: a non-exposed portion (21, 31) disposed inside the exterior resin; and exposed portions (25, 35) exposed from the exterior resin. At least one of the anode terminal (20) and the cathode terminal (30) has at least two holes (26, 36) formed so as to straddle the non-exposed portions (21, 31) and the exposed portions (25, 35).

Description

Technical Field

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

[0002] In the past, electrolytic capacitors using solid electrolytes (solid electrolytic capacitors) are known (for example, Patent Document 1). The solid electrolytic capacitor of Patent Document 1 includes a capacitor element, an anode terminal, a cathode terminal, and an outer resin covering them, and the anode terminal and the cathode terminal each have a hole or a notch extending inside and outside the outer resin.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: JP Patent No. 3543489

[0006] However, the solid electrolytic capacitor of Patent Document 1 may peel off at the interface between each terminal and the outer resin due to stress concentration on a part of each terminal during processing of each terminal. If such peeling occurs, air will intrude into the inner part of the outer resin, and the capacitor element will oxidize and deteriorate. Under such circumstances, one of the purposes of the present disclosure is to improve the airtightness of the solid electrolytic capacitor. Utility Model Content

[0007] One aspect of the present disclosure relates to a solid electrolytic capacitor. The solid electrolytic capacitor comprises: a capacitor element having an anode portion and a cathode portion; an anode terminal electrically connected to the anode portion; a cathode terminal electrically connected to the cathode portion; and an outer resin covering the capacitor element, the anode terminal, and the cathode terminal, wherein the anode terminal and the cathode terminal each have: a non-exposed portion disposed inside the outer resin; and an exposed portion exposed from the outer resin, and at least one of the anode terminal and the cathode terminal has at least two holes formed across the non-exposed portion and the exposed portion.

[0008] Another aspect of the present disclosure relates to a solid electrolytic capacitor. The solid electrolytic capacitor comprises: a capacitor element having an anode portion and a cathode portion; an anode terminal electrically connected to the anode portion; a cathode terminal electrically connected to the cathode portion; and an outer resin covering the capacitor element, the anode terminal, and the cathode terminal, wherein the anode terminal and the cathode terminal each have: a non-exposed portion disposed inside the outer resin; and an exposed portion exposed from the outer resin, a step portion is provided on the non-exposed portion of at least one of the anode terminal and the cathode terminal, and in the non-exposed portion, a portion farther than the step portion is wider than a portion closer to the step portion relative to a boundary between the exposed portion and the non-exposed portion.

[0009] Effect of utility model

[0010] According to the present disclosure, the airtightness of a solid electrolytic capacitor can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a side perspective view schematically showing an example of a solid electrolytic capacitor according to the present disclosure.

[0012] Figure 2 It is a perspective view showing the anode terminal and the cathode terminal of the first embodiment, and the cathode terminal is shown on the front side of the paper.

[0013] Figure 3 This is another perspective view showing the anode terminal and the cathode terminal according to the first embodiment, and the anode terminal is shown on the front side of the paper.

[0014] Figure 4 It is a perspective view showing the anode terminal and the cathode terminal of the second embodiment, and the cathode terminal is shown on the front side of the paper.

[0015] Figure 5 It is a perspective view showing the anode terminal and the cathode terminal of the third embodiment, and the cathode terminal is shown on the front side of the paper.

[0016] Explanation of symbols

[0017] 10: Solid electrolytic capacitor

[0018] 11: Laminated body

[0019] 12: Capacitor elements

[0020] 13: Anode

[0021] 14: Cathode

[0022] 15: Insulation

[0023] 20: Anode terminal

[0024] 21: Non-exposed area

[0025] 22: Loading section

[0026] 23: Bending part

[0027] 23a: Area 1

[0028] 23b: Area 2

[0029] 23c: Zone 3

[0030] 24: Fixed part

[0031] 25: Exposed part

[0032] 26: Hole

[0033] 27: Steps

[0034] 30: Cathode terminal

[0035] 31: Non-exposed area

[0036] 32: Loading section

[0037] 33: Bending part

[0038] 33a: Area 1

[0039] 33b: Area 2

[0040] 33c: Zone 3

[0041] 34: Side wall

[0042] 35: Exposed part

[0043] 36: Hole

[0044] 37: Step

[0045] 40: Exterior resin. DETAILED DESCRIPTION

[0046] The following describes the implementation of the solid electrolytic capacitor involved in the present disclosure by giving examples. However, the present disclosure is not limited to the examples described below. In the following description, specific values ​​and materials are sometimes exemplified, but other values ​​and materials may also be used as long as the effects of the present disclosure can be obtained.

[0047] A solid electrolytic capacitor according to an embodiment of the present disclosure (hereinafter also referred to as a solid electrolytic capacitor A) includes a capacitor element, an anode terminal, a cathode terminal, and an exterior resin.

[0048] The capacitor element has an anode portion and a cathode portion. A plurality of capacitor elements may be provided and stacked one on another. The capacitor element may also have an insulating portion provided between the anode portion and the cathode portion to electrically insulate the two. The insulating portion may be formed of, for example, an insulating tape or an insulating resin.

[0049] The anode portion may be configured to include a portion of the anode body (a portion on one end side based on the insulating portion) of the capacitor element and made of a valve-acting metal. The cathode portion may be configured to include a solid electrolyte layer and a cathode layer sequentially formed on the surface of a cathode forming portion that is the remaining portion of the anode body (a portion on the other end side based on the insulating portion). A dielectric layer is provided between the anode body and the solid electrolyte layer.

[0050] Examples of the valve metal constituting the anode body include aluminum, tantalum, niobium, titanium, etc. The anode body may be a foil of the valve metal or a sintered body of valve metal particles.

[0051] The dielectric layer is formed at least on the surface of the cathode forming portion which is the remainder of the anode body. The dielectric layer may be composed of an oxide (eg, aluminum oxide) formed on the surface of the anode body by a liquid phase method such as anodic oxidation, or a gas phase method such as vapor deposition or atomic layer deposition.

[0052] The solid electrolyte layer is formed on the surface of the dielectric layer. The solid electrolyte layer may contain a conductive polymer. The solid electrolyte layer may further contain a dopant as required.

[0053] As the conductive polymer, known conductive polymers used in solid electrolytic capacitors can be used, for example, π-conjugated conductive polymers can be used. As conductive polymers, for example, polymers with polypyrrole, polythiophene, polyaniline, polyfuran, polyacetylene, polyphenylene, polyphenylene vinylene, polybenzone and polythiophene vinylene as basic skeletons can be cited. Among these, polymers with polypyrrole, polythiophene or polyaniline as basic skeletons are preferred. The above-mentioned polymers also include homopolymers, copolymers of two or more monomers and their derivatives (substituents with substituents, etc.). For example, polythiophene includes poly (3,4-ethylenedioxythiophene) and the like. Conductive polymers can be used alone or in combination of two or more.

[0054] As a dopant, for example, at least one selected from a group consisting of low molecular anions and polyanions is used. As low molecular anions, for example, sulfate ions, nitrate ions, phosphate ions, borate ions, organic sulfonate ions, carboxylate ions, etc. can be cited, but there is no particular limitation. As a dopant that generates organic sulfonate ions, for example, benzenesulfonic acid, p-toluenesulfonic acid and naphthalenesulfonic acid can be cited. As a polyanion, for example, high molecular weight polysulfonic acids and high molecular weight polycarboxylic acids can be cited. As high molecular weight polysulfonic acids, polyethylene sulfonic acid, polystyrene sulfonic acid, polyallyl sulfonic acid, polypropylene sulfonic acid and polymethacrylic acid can be cited. As high molecular weight polycarboxylic acids, polyacrylic acid, polymethacrylic acid, etc. can be cited. Polyanions also include polyester sulfonic acid and phenolsulfonic acid novolac resin. However, polyanions are not limited to these.

[0055] The solid electrolyte layer may further contain known additives and known conductive materials other than the conductive polymer as needed. Such conductive materials include, for example, at least one selected from the group consisting of conductive inorganic materials such as manganese dioxide and TCNQ complex salts.

[0056] The cathode layer may be composed of a carbon layer formed on the surface of the solid electrolyte layer and a conductor layer formed on the surface of the carbon layer. The conductor layer may be composed of a silver paste. As the silver paste, a composition comprising silver particles and a resin component (binder resin) can be used. As the resin component, a thermoplastic resin can be used, but preferably a thermosetting resin such as an imide resin or an epoxy resin is used.

[0057] The anode terminal is electrically connected to the anode portion of the capacitor element. The anode terminal may be made of copper, a copper alloy, aluminum, or an aluminum alloy, and may also be plated. The anode terminal may be electrically connected to the anode portion by riveting, or may be electrically connected to the anode portion by welding (e.g., laser welding or resistance welding).

[0058] The cathode terminal is electrically connected to the cathode portion of the capacitor element. The cathode terminal may be made of copper, copper alloy, aluminum or aluminum alloy, and may be plated. The constituent material of the cathode terminal may be the same as or different from the constituent material of the anode terminal. The cathode terminal may also be electrically connected to the cathode portion via a conductive adhesive.

[0059] The outer coating resin covers the capacitor element, the anode terminal and the cathode terminal. The outer coating resin can cover these elements so that a portion of the anode terminal and the cathode terminal are exposed. The outer coating resin can be composed of an insulating resin material. The outer coating resin can be, for example, a cured product of a thermosetting resin including an epoxy resin, and can also contain fillers as needed.

[0060] The above-mentioned anode terminal and cathode terminal each have: a non-exposed portion arranged inside the outer resin; and an exposed portion exposed from the outer resin. The non-exposed portion of the anode terminal can be electrically connected to the anode portion of the capacitor element. The non-exposed portion of the cathode terminal can be electrically connected to the cathode portion of the capacitor element. The exposed portion of the anode terminal can constitute an external terminal of the solid electrolytic capacitor A. The exposed portion of the cathode terminal can constitute another external terminal of the solid electrolytic capacitor A.

[0061] At least one of the anode terminal and the cathode terminal has at least two holes formed across the non-exposed portion and the exposed portion. For this reason, the portion of at least one of the anode terminal and the cathode terminal that spans the non-exposed portion and the exposed portion branches into more than three parts and extends. According to such a structure, even if a tensile force is applied to each terminal, the stress will be dispersed in the portion that branches into more than three parts in the area spanning the non-exposed portion and the exposed portion (especially the boundary between the non-exposed portion and the exposed portion). Since stress is not easily concentrated in a specific position, it is not easy to cause peeling of each terminal from the outer resin. Therefore, the airtightness of the solid electrolytic capacitor A can be improved. In addition, the number of holes possessed by each terminal is not particularly limited as long as it is more than two.

[0062] A step portion is provided in the area corresponding to the hole portion in the non-exposed portion, and in the non-exposed portion, relative to the boundary between the exposed portion and the non-exposed portion, the portion farther than the step portion is wider than the portion closer than the step portion. In this structure, when a tensile force is applied to each terminal, an anchoring effect is generated between the step portion and the outer coating resin near it, which can suppress the stress generated in the terminal from being transmitted to the capacitor element side closer than the step portion. In addition, when a tensile force is applied to each terminal, since the stress generated in the terminal is concentrated on the step portion, the stress can be suppressed from being transmitted to the capacitor element side closer than the step portion. As a result, when observed from the exposed portion side, even if the terminal and the outer coating resin are peeled off on the front side closer than the step portion, the peeling can be suppressed from progressing to the inner side closer than the step portion.

[0063] The non-exposed portion may include: a loading portion on which the capacitor element is loaded; and a bent portion that is bent and extended in a step-like manner between the loading portion and the exposed portion. The step portion may be provided at the bent portion. According to this structure, compared with a case where a straight line is formed from the loading portion to the exposed portion, the creepage distance from the loading portion to the exposed portion can be extended, thereby further suppressing air from reaching the capacitor element.

[0064] The bent portion may include: a first region adjacent to the mounting portion; a second region adjacent to the exposed portion; and a third region connecting the first region and the second region. The step portion may be provided in the second region, or in the half of the third region on the second region side. By providing the step portion in such a region, the above-mentioned anchoring effect is easily exerted, and air can be further suppressed from reaching the capacitor element.

[0065] The step portion may be provided in the half of the third region on the second region side. In this case, even if there are manufacturing tolerances in the terminals, the exterior resin, etc., the above-mentioned anchoring effect can be surely exerted, and thus the reliability of the solid electrolytic capacitor A can be improved.

[0066] At least one of the anode terminal and the cathode terminal may have only two holes. In other words, the portion of at least one of the anode terminal and the cathode terminal that spans the non-exposed portion and the exposed portion may branch into three portions and extend. In this case, the solid electrolytic capacitor A involved in the present disclosure can be manufactured particularly easily. In addition, it is easy to fill the hole with an external resin, and the equivalent series resistance and equivalent series inductance of the solid electrolytic capacitor A can be reduced.

[0067] The maximum value of the width dimension of the region corresponding to the hole portion in the non-exposed portion (i.e., the dimension in the width direction of the region including the hole portion) can be set to W [mm], and the total dimension of two or more hole portions in the width direction can be set to L [mm], so that 0.1 ≤ L / W ≤ 0.5 holds. When L / W is within such a range, the improvement of the bending strength of the region corresponding to the hole portion in the non-exposed portion and the reduction of the resistance of the region can be achieved at a high level.

[0068] A solid electrolytic capacitor according to another embodiment of the present disclosure (hereinafter also referred to as solid electrolytic capacitor B) includes a capacitor element, an anode terminal, a cathode terminal, and an outer resin. The capacitor element and the outer resin may be the same as those of the solid electrolytic capacitor A.

[0069] The anode terminal and the cathode terminal each have: a non-exposed portion disposed inside the outer resin; and an exposed portion exposed from the outer resin. The non-exposed portion of the anode terminal can be electrically connected to the anode portion of the capacitor element. The non-exposed portion of the cathode terminal can be electrically connected to the cathode portion of the capacitor element. The exposed portion of the anode terminal can constitute an external terminal of the solid electrolytic capacitor B. The exposed portion of the cathode terminal can constitute another external terminal of the solid electrolytic capacitor B.

[0070] At least one of the anode terminal and the cathode terminal has a step portion provided in the non-exposed portion, and in the non-exposed portion, relative to the boundary between the exposed portion and the non-exposed portion, the portion farther than the step portion is wider than the portion closer than the step portion. According to such a structure, when a tensile force is applied to each terminal, an anchoring effect is generated between the step portion and the outer coating resin near it, which can suppress the stress generated in the terminal from being transmitted to the capacitor element side closer to the step portion. In addition, when a tensile force is applied to each terminal, since the stress generated in the terminal is concentrated on the step portion, the stress can be suppressed from being transmitted to the capacitor element side closer to the step portion. As a result, when observed from the exposed portion side, even if the terminal and the outer coating resin are peeled off on the front side closer to the step portion, the peeling can be suppressed from progressing to the inner side closer to the step portion. Therefore, the airtightness of the solid electrolytic capacitor B can be improved.

[0071] The non-exposed portion may include: a loading portion on which the capacitor element is loaded; and a bent portion that is bent and extended in a step-like manner between the loading portion and the exposed portion. The step portion may be provided at the bent portion. According to this structure, compared with a case where a straight line is formed from the loading portion to the exposed portion, the creepage distance from the loading portion to the exposed portion can be extended, thereby further suppressing air from reaching the capacitor element.

[0072] The bent portion may include: a first region adjacent to the mounting portion; a second region adjacent to the exposed portion; and a third region connecting the first region and the second region. The step portion may be provided in the second region, or in the half of the third region on the second region side. By providing the step portion in such a region, the above-mentioned anchoring effect is easily exerted, and air can be further suppressed from reaching the capacitor element.

[0073] The step portion may be provided in the half of the third region on the second region side. In this case, even if there are manufacturing tolerances in the terminals, the exterior resin, etc., the above-mentioned anchoring effect can be surely exerted, and thus the reliability of the solid electrolytic capacitor B can be improved.

[0074] At least one of the anode terminal and the cathode terminal may have at least one hole portion formed across the non-exposed portion and the exposed portion. In other words, the portion of at least one of the anode terminal and the cathode terminal that spans the non-exposed portion and the exposed portion may branch into more than two parts and extend. According to this structure, even if a tensile force is applied to each terminal, in the area spanning the non-exposed portion and the exposed portion (especially the boundary between the non-exposed portion and the exposed portion), the stress is dispersed in the portion that branches into more than two parts. Since stress is not easily concentrated in a specific position, it is not easy for each terminal to peel off from the outer resin. Therefore, the airtightness of the solid electrolytic capacitor B can be improved. In addition, the number of holes possessed by each terminal is not particularly limited as long as it is more than one, and for example, it may be two.

[0075] As described above, according to the present disclosure, by providing two or more holes in the anode terminal and / or the cathode terminal, or by providing a step portion in the anode terminal and / or the cathode terminal, the airtightness of the solid electrolytic capacitor can be improved.

[0076] Hereinafter, an example of a solid electrolytic capacitor involved in the present disclosure will be described in detail with reference to the accompanying drawings. The constituent elements of the solid electrolytic capacitor of the example described below can apply the above-mentioned constituent elements. The constituent elements of the solid electrolytic capacitor of the example described below can be changed based on the above-mentioned description. In addition, the matters described below can be applied to the above-mentioned embodiments. Among the constituent elements of the solid electrolytic capacitor of the example described below, constituent elements that are not necessary for the solid electrolytic capacitor involved in the present disclosure can also be omitted. In addition, the figures shown below are schematic and do not correctly reflect the shape and quantity of the actual components.

[0077] Implementation Method 1

[0078] Embodiment 1 of the present disclosure is described. Figure 1 to Figure 3 As shown, solid electrolytic capacitor 10 of the present embodiment includes: laminate 11 in which a plurality (six in this example) of capacitor elements 12 are laminated; anode terminal 20 ; cathode terminal 30 ; and exterior resin 40 .

[0079] Each of the plurality of capacitor elements 12 has: Figure 1 The anode portion 13 is arranged on the left end side of the anode portion 13; Figure 1 and an insulating portion 15 provided between the anode portion 13 and the cathode portion 14 and electrically insulating the two.

[0080] Anode terminal 20 is electrically connected to anode portion 13 of capacitor element 12. Anode terminal 20 is electrically connected to anode portion 13 by riveting and welding. Anode terminal 20 may be made of copper or a copper alloy.

[0081] Cathode terminal 30 is electrically connected to cathode portion 14 of capacitor element 12. Cathode terminal 30 is electrically connected to cathode portion 14 via a conductive adhesive (not shown). Cathode terminal 30 may be made of copper or a copper alloy.

[0082] The outer resin 40 covers the laminate 11, the anode terminal 20, and the cathode terminal 30, so that a portion of each of the anode terminal 20 and the cathode terminal 30 is exposed. The exposed portion of each of the anode terminal 20 and the cathode terminal 30 functions as an external terminal of the solid electrolytic capacitor 10. The outer resin 40 can be made of an insulating resin material.

[0083] Anode terminal 20 and cathode terminal 30 each have non-exposed portion 21, 31 disposed inside exterior resin 40 and exposed portion 25, 35 exposed from exterior resin 40. Each exposed portion 25, 35 has a shape along the outer surface of exterior resin 40.

[0084] The non-exposed portion 21 of the anode terminal 20 includes: a mounting portion 22 on which the anode portion 13 of the capacitor element 12 is mounted; a bent portion 23 that is bent and extended in a step-like manner between the mounting portion 22 and the exposed portion 25 of the anode terminal 20; and a fixing portion 24 that is provided integrally with the mounting portion 22 and is used to rivet and fix the anode portion 13. The bent portion 23 includes: a first region 23a adjacent to the mounting portion 22; a second region 23b adjacent to the exposed portion 25; and a third region 23c that connects the first region 23a and the second region 23b.

[0085] The non-exposed portion 31 of the cathode terminal 30 includes: a mounting portion 32 on which the cathode portion 14 of the capacitor element 12 is mounted; a bent portion 33 that is bent and extended in a step-like manner between the mounting portion 32 and the exposed portion 35 of the cathode terminal 30; and a side wall portion 34 that is integrally provided with the mounting portion 32 and is electrically connected to the side surface of the cathode portion 14. The bent portion 33 includes: a first region 33a adjacent to the mounting portion 32; a second region 33b adjacent to the exposed portion 35; and a third region 33c that connects the first region 33a and the second region 33b.

[0086] Anode terminal 20 has two holes 26 formed across non-exposed portion 21 and exposed portion 25. The region of anode terminal 20 where two holes 26 are formed branches into three parts and extends. Each hole 26 extends along the extending direction of anode terminal 20. Regarding the portion branched into three parts and extending, the two parts at both ends are respectively set as the first branch part, and the one part in the middle is set as the second branch part, and the second branch part can be thinner than the first branch part.

[0087] Step portion 27 is provided in a region corresponding to hole portion 26 in non-exposed portion 21 of anode terminal 20, and a portion farther from step portion 27 is wider than a portion closer to step portion 27 relative to a boundary between exposed portion 25 and non-exposed portion 21 in non-exposed portion 21. Step portion 27 of the present embodiment is provided in a half portion (upper half portion in each figure) on the second region 23b side of third region 23c of bent portion 23 of anode terminal 20, but the present invention is not limited thereto.

[0088] The cathode terminal 30 has two holes 36 formed across the non-exposed portion 31 and the exposed portion 35. The region of the cathode terminal 30 where the two holes 36 are formed branches into three parts and extends. Each hole 36 extends along the extension direction of the cathode terminal 30.

[0089] The step portion 37 is provided in the area corresponding to the hole portion 36 in the non-exposed portion 31 of the cathode terminal 30, and in the non-exposed portion 31, the portion farther from the step portion 37 is wider than the portion closer to the step portion 37 relative to the boundary between the exposed portion 35 and the non-exposed portion 31. The step portion 37 of the present embodiment is provided in the half portion (the upper half portion in each figure) on the second region 33b side of the third region 33c of the bent portion 33 of the cathode terminal 30, but the present invention is not limited thereto.

[0090] Implementation Method 2

[0091] Embodiment 2 of the present disclosure is described. Figure 4 As shown, the solid electrolytic capacitor 10 of the present embodiment does not have holes 26 and 36 in the anode terminal 20 and the cathode terminal 30. The structure other than this is the same as that of the first embodiment described above.

[0092] Implementation Method 3

[0093] Embodiment 3 of the present disclosure is described. Figure 5 As shown, the solid electrolytic capacitor 10 of the present embodiment has one hole 26 and one hole 36 provided in each of the anode terminal 20 and the cathode terminal 30. The other structures are the same as those of the above-mentioned Embodiment-1.

[0094] Postscript

[0095] The following techniques are disclosed through the description of the above embodiments.

[0096] (Technology 1)

[0097] A solid electrolytic capacitor comprises: a capacitor element having an anode portion and a cathode portion; an anode terminal electrically connected to the anode portion; a cathode terminal electrically connected to the cathode portion; and an outer resin covering the capacitor element, the anode terminal, and the cathode terminal, wherein the anode terminal and the cathode terminal each have: a non-exposed portion arranged inside the outer resin; and an exposed portion exposed from the outer resin, and at least one of the anode terminal and the cathode terminal has at least two holes formed across the non-exposed portion and the exposed portion.

[0098] (Technique 2)

[0099] In the solid electrolytic capacitor described in technology 1, a step portion is provided in the area corresponding to the hole portion in the non-exposed portion, and in the non-exposed portion, a portion farther than the step portion is wider than a portion closer to the step portion relative to a boundary between the exposed portion and the non-exposed portion.

[0100] (Technique 3)

[0101] In the solid electrolytic capacitor according to technology 2, the non-exposed portion includes: a placement portion on which the capacitor element is placed; and a bent portion extending and bent in a stepwise manner between the placement portion and the exposed portion, and the step portion is provided in the bent portion.

[0102] (Technique 4)

[0103] In the solid electrolytic capacitor described in Technology 3, the bent portion has: a first region adjacent to the supporting portion; a second region adjacent to the exposed portion; and a third region connecting the first region and the second region, and the step portion is provided in the second region, or in the half of the third region on the second region side.

[0104] (Technique 5)

[0105] In the solid electrolytic capacitor according to the fourth aspect, the step portion is provided in a half portion of the third region on the second region side.

[0106] (Technique 6)

[0107] In the solid electrolytic capacitor according to any one of techniques 1 to 5, at least one of the anode terminal and the cathode terminal has only two holes.

[0108] (Technique 7)

[0109] A solid electrolytic capacitor comprises: a capacitor element having an anode portion and a cathode portion; an anode terminal electrically connected to the anode portion; a cathode terminal electrically connected to the cathode portion; and an outer resin covering the capacitor element, the anode terminal and the cathode terminal, wherein the anode terminal and the cathode terminal each comprise: a non-exposed portion arranged inside the outer resin; and an exposed portion exposed from the outer resin, a step portion is provided on the non-exposed portion of at least one of the anode terminal and the cathode terminal, and in the non-exposed portion, a portion farther than the step portion is wider than a portion closer to the step portion relative to a boundary between the exposed portion and the non-exposed portion.

[0110] (Technology 8)

[0111] In the solid electrolytic capacitor according to technology 7, the non-exposed portion includes: a placement portion on which the capacitor element is placed; and a bent portion extending and bending in a stepwise manner between the placement portion and the exposed portion, and the step portion is provided in the bent portion.

[0112] (Technique 9)

[0113] In the solid electrolytic capacitor described in Technology 8, the bent portion has: a first region adjacent to the supporting portion; a second region adjacent to the exposed portion; and a third region connecting the first region and the second region, and the step portion is provided in the second region, or in the half of the third region on the second region side.

[0114] (Technology 10)

[0115] In the solid electrolytic capacitor according to technology 9, the step portion is provided in a half portion of the third region on the second region side.

[0116] (Technology 11)

[0117] In the solid electrolytic capacitor according to any one of Techniques 7 to 10, at least one of the anode terminal and the cathode terminal has at least one hole portion formed across the non-exposed portion and the exposed portion.

[0118] Industrial Applicability

[0119] The present disclosure can be utilized in solid electrolytic capacitors.

Claims

1. A solid electrolytic capacitor, characterized in that: have: A capacitor element having an anode portion and a cathode portion; an anode terminal electrically connected to the anode portion; a cathode terminal electrically connected to the cathode portion; and The capacitor element, the anode terminal and the cathode terminal are covered with an outer resin, The anode terminal and the cathode terminal each have: a non-exposed portion disposed inside the exterior resin; and The exposed portion exposed from the exterior resin, At least one of the anode terminal and the cathode terminal has at least two holes formed across the non-exposed portion and the exposed portion.

2. The solid electrolytic capacitor according to claim 1, characterized in that: A step portion is provided in a region of the non-exposed portion corresponding to the hole portion, In the non-exposed portion, a portion farther from the step portion relative to a boundary between the exposed portion and the non-exposed portion is wider than a portion closer to the step portion.

3. The solid electrolytic capacitor according to claim 2, characterized in that: The non-exposed portion has: a mounting portion on which the capacitor element is mounted; and a bent portion extending and bending in a step-like manner between the mounting portion and the exposed portion, The step portion is provided at the bent portion.

4. The solid electrolytic capacitor according to claim 3, characterized in that: The bent portion has: a first area adjacent to the mounting portion; a second region adjacent to the exposed portion; and a third region connecting the first region and the second region, The step portion is provided in the second region, or in a half portion of the third region on the second region side.

5. The solid electrolytic capacitor according to claim 4, characterized in that: The step portion is provided at a half portion of the third region on the second region side.

6. The solid electrolytic capacitor according to any one of claims 1 to 5, characterized in that: At least one of the anode terminal and the cathode terminal has only two holes.

7. A solid electrolytic capacitor, characterized in that: have: A capacitor element having an anode portion and a cathode portion; an anode terminal electrically connected to the anode portion; a cathode terminal electrically connected to the cathode portion; and The capacitor element, the anode terminal and the cathode terminal are covered with an outer resin, The anode terminal and the cathode terminal each have: a non-exposed portion disposed inside the exterior resin; and The exposed portion exposed from the exterior resin, A step portion is provided on the non-exposed portion of at least one of the anode terminal and the cathode terminal, In the non-exposed portion, a portion farther from the step portion relative to a boundary between the exposed portion and the non-exposed portion is wider than a portion closer to the step portion.

8. The solid electrolytic capacitor according to claim 7, characterized in that: The non-exposed portion has: a mounting portion on which the capacitor element is mounted; and a bent portion extending and bending in a step-like manner between the mounting portion and the exposed portion, The step portion is provided at the bent portion.

9. The solid electrolytic capacitor according to claim 8, characterized in that: The bent portion has: a first area adjacent to the mounting portion; a second region adjacent to the exposed portion; and a third region connecting the first region and the second region, The step portion is provided in the second region, or in a half portion of the third region on the second region side.

10. The solid electrolytic capacitor according to claim 9, characterized in that: The step portion is provided at a half portion of the third region on the second region side.

11. The solid electrolytic capacitor according to any one of claims 7 to 10, characterized in that: At least one of the anode terminal and the cathode terminal has at least one hole portion formed across the non-exposed portion and the exposed portion.

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