A thin film capacitor

Abstract

The application discloses a film capacitor which comprises a capacitor core, at least one first metal shell, at least one second metal shell, a first connecting sheet and a second connecting sheet; the first metal shell and the second metal shell are spliced together through an insulator to jointly define a containing cavity; a first leading terminal is arranged on the first metal shell, and a second leading terminal is arranged on the second metal shell; the first connecting sheet is connected with the capacitor core and the first metal shell; the second connecting sheet is connected with the capacitor core and the second metal shell; the capacitor core, the first connecting sheet and the second connecting sheet are arranged in the containing cavity and are sealed through potting glue; the capacitor has good heat dissipation capacity while improving current resistance capacity, and the thermal resistance of the product is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of capacitors, in particular to a thin-film capacitor. BACKGROUND

[0002] Thin-film capacitors are widely used in electronic devices, industrial control, automobiles and other fields. At present, the thin-film capacitors on the market are mainly composed of a capacitor core, a busbar, a packaging shell and a filling resin.

[0003] With the development and progress of technology, thin-film capacitors need to have small size, high current-carrying capacity and high power density. However, when the size of the thin-film capacitor is reduced, its heat dissipation area will correspondingly become smaller; when the current of the thin-film capacitor is increased and the power density is improved, its heat generation will correspondingly increase. Thus, the heat dissipation of the thin-film capacitor becomes a prominent problem. SUMMARY

[0004] The present application aims to at least solve one of the above technical problems in the technical field. To this end, the purpose of the present application is to propose a thin-film capacitor which, while improving the current-carrying capacity, has good heat dissipation capacity, so that the thermal resistance of the product is greatly reduced.

[0005] To achieve the above-mentioned purpose, an embodiment of the present application proposes a thin-film capacitor comprising a capacitor core, at least one first metal shell, at least one second metal shell, a first connecting sheet and a second connecting sheet.

[0006] The first metal shell and the second metal shell are spliced together by an insulator to jointly define a receiving cavity.

[0007] The first metal shell is provided with a first lead terminal, and the second metal shell is provided with a second lead terminal.

[0008] The first connecting sheet is connected with the capacitor core and the first metal shell.

[0009] The second connecting sheet is connected with the capacitor core and the second metal shell.

[0010] The capacitor core, the first connecting sheet and the second connecting sheet are arranged in the receiving cavity and sealed by potting glue.

[0011] According to the film capacitor provided by the embodiment of the present application, the metal shell serves as both the shell and the lead electrode, so that the ripple current resistance of the capacitor is increased to 1.2 A / μF or above; when the metal shell is cooled by the heat-conducting insulating pad, the metal shell also serves as the electrode, so that the heat dissipation path is shorter, and the influence of the current heat on the capacitor core is minimized; in addition, compared with the plastic shell, the metal shell has a high heat conductivity, so that the thermal resistance of the capacitor can be greatly reduced; and the metal is water-proof, so that the moisture-proof performance of the capacitor is improved.

[0012] In addition, the film capacitor provided by the above embodiment of the present application can also have the following additional technical features.

[0013] Optionally, the first lead terminal comprises a first current input terminal and a first current output terminal, and the first current input terminal and the first current output terminal are arranged on two sides of the first metal shell; the second lead terminal comprises a second current input terminal and a second current output terminal, and the second current input terminal and the second current output terminal are arranged on two sides of the second metal shell.

[0014] Further, the first current output terminal extends from a specified edge of the first metal shell to the thickness direction of the first metal shell and is bent to form, and the first current input terminal extends from the specified edge of the first metal shell to a direction perpendicular to the thickness direction of the first metal shell; the second current output terminal extends from a specified edge of the second metal shell to the thickness direction of the second metal shell and is bent to form, and the second current input terminal extends from the specified edge of the second metal shell to a direction perpendicular to the thickness direction of the second metal shell.

[0015] Optionally, the insulator has a first groove and a second groove facing each other, the first metal shell is embedded in the first groove near the edge of the insulator, and the second metal shell is embedded in the second groove near the edge of the insulator.

[0016] Optionally, the first connecting piece and the second connecting piece are opposite to each other, and the capacitor core is arranged between the first connecting piece and the second connecting piece.

[0017] Further, the first connecting piece comprises a first connecting piece body and a first connecting terminal, the first connecting piece body is connected with the capacitor core, and the first connecting terminal penetrates the potting glue and is connected with the first current output terminal; the second connecting piece comprises a second connecting piece body and a second connecting terminal, the second connecting piece body is connected with the capacitor core, and the second connecting terminal penetrates the potting glue and is connected with the second current output terminal.

[0018] Further, the first connecting sheet body and the second connecting sheet body are each provided with a third connecting terminal connected to an end surface of the capacitor core.

[0019] Further, the first connecting sheet body and the second connecting sheet body each have a protruding portion toward an end surface of the capacitor core, and the protruding portion is fitted to the end surface of the capacitor core.

[0020] Further, the third connecting terminal is provided on the protruding portion.

[0021] Optionally, the first metal shell is integrally formed with the first lead-out terminal; and the second metal shell is integrally formed with the second lead-out terminal.

[0022] Further, the first current output terminals are a plurality of and are provided at a prescribed edge of the first metal shell at intervals; and the second current output terminals are a plurality of and are provided at a prescribed edge of the second metal shell at intervals.

[0023] Further, the first current output terminals and the second current output terminals are each a plurality of to constitute a plurality of pairs, and the first current output terminal and the second current output terminal in each pair are adjacent. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Fig. 1 is a structure diagram of a film capacitor according to an embodiment of the present application;

[0025] Figure 2 Fig. 2 is an exploded view of the film capacitor according to the embodiment of the present application;

[0026] Figure 3 Fig. 3 is another perspective exploded view of the film capacitor according to the embodiment of the present application;

[0027] Figure 4 Fig. 4 is a sectional view of the film capacitor according to the embodiment of the present application;

[0028] Figure 5 Fig. 5 is an exploded view of a film capacitor according to another embodiment of the present application;

[0029] Figure 6 Fig. 6 is another perspective exploded view of the film capacitor according to the other embodiment of the present application.

[0030] REFERENCE NUMERALS:

[0031] Capacitor core 10;

[0032] First metal shell 20, first lead-out terminal 21, first current input terminal 211, first current output terminal 212;

[0033] the second metal shell 30, the second lead terminal 31, the second current input terminal 311, the second current output terminal 312;

[0034] the first connecting sheet 40, the first connecting sheet body 41, the first connecting terminal 42;

[0035] the second connecting sheet 50, the second connecting sheet body 51, the second connecting terminal 52, the third connecting terminal (43; 53), the protruding part (44; 54);

[0036] the insulator 60, the first recess 61, the second recess 62;

[0037] the potting glue 70. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0039] The following detailed description of the application will be made with reference to the accompanying drawings. Figures 1-6 Specifically, the thin film capacitor according to the embodiments of the present application is described below.

[0040] Embodiment One

[0041] As shown in the drawings, the thin film capacitor according to the embodiments of the present application comprises a capacitor core 10, at least one first metal shell 20, at least one second metal shell 30, a first connecting sheet 40 and a second connecting sheet 50. Figures 1 to 4 Specifically, the first metal shell 20 and the second metal shell 30 are spliced together by the insulator 60 to jointly define a receiving cavity H; the first metal shell 20 is provided with a first lead terminal 21, and the second metal shell 30 is provided with a second lead terminal 31; the first connecting sheet 40 is connected with the capacitor core 10 and the first metal shell 20; the second connecting sheet 50 is connected with the capacitor core 10 and the second metal shell 30; the capacitor core 10, the first connecting sheet 40 and the second connecting sheet 50 are arranged in the receiving cavity H and are sealed by the potting glue 70.

[0042] In other words, as shown in the drawings, the first metal shell 20 and the second metal shell 30 are spliced together by the insulator 60 to jointly define a receiving cavity H; the first metal shell 20 is provided with a first lead terminal 21, and the second metal shell 30 is provided with a second lead terminal 31; the first connecting sheet 40 is connected with the capacitor core 10 and the first metal shell 20; the second connecting sheet 50 is connected with the capacitor core 10 and the second metal shell 30; the capacitor core 10, the first connecting sheet 40 and the second connecting sheet 50 are arranged in the receiving cavity H and are sealed by the potting glue 70.

[0043] Figure 4 ​As shown, the first metal shell 20, the second metal shell 30 and the insulator 60 are spliced into a complete shell, and the shell is provided with a containing cavity for containing the capacitor core 10, the first connecting sheet 40, the second connecting sheet 50 and the pouring glue 70; wherein the first metal shell 20 and the second metal shell 30 are connected by the insulator 60, and the first metal shell 20 and the second metal shell 30 are not in contact, so that the electrode terminals (i.e. the first lead-out terminal 21 and the second lead-out terminal 31) of the first metal shell 20 and the second metal shell 30 can be made; it should be noted that if the first lead-out terminal 21 is a positive terminal, the second lead-out terminal 31 is a negative terminal, and if the first lead-out terminal 21 is a negative terminal, the second lead-out terminal 31 is a positive terminal.

[0044] Therefore, compared with the film capacitor on the market, the capacitor according to the embodiment of the application directly makes electrodes on the metal shell, reduces the use of the plastic shell, reduces the arrangement of the busbar, and reduces the volume of the capacitor as a whole. The metal shell serves as both the shell and the lead-out electrode, so that the ripple current capacity of the capacitor is improved to 1.2A / μF (according to the capacity of the capacitor, the ripple current that can be borne by each μF is generally <0.5A. Taking a 300μF film capacitor as an example, the ripple current that can be borne is not higher than 150A, while the ripple current that can be borne by the film capacitor of the embodiment can reach more than 360A or even higher); when the metal shell is cooled by the heat-conducting insulating pad, the metal shell also serves as the electrode, so that the heat dissipation path is shorter, and the influence of current heating on the capacitor core 10 can be minimized; in addition, compared with the plastic shell, the metal shell has a high thermal conductivity, so that the thermal resistance of the capacitor can be greatly reduced; the metal is water-tight, and the moisture-proof performance of the capacitor can also be improved.

[0045] According to one embodiment of the application, the number of the first metal shell 20 and the second metal shell 30 can be multiple, but the number of the two should be set to be consistent, for example, two first metal shells 20 and two second metal shells 30 are set, and when splicing, the first first metal shell 20 is spliced with the first second metal shell 30 through the first insulator 60, the second metal shell 30 is spliced with the second first metal shell 20 through the second insulator 60, and the first metal shell 20 is spliced with the second second metal shell 30 through the third insulator 60, thereby forming a complete shell.

[0046] According to one embodiment of the present application, the first lead terminal 21 comprises a first current input terminal 211 and a first current output terminal 212, and the first current input terminal 211 and the first current output terminal 212 are arranged on two sides of the first metal shell 20; the second lead terminal 31 comprises a second current input terminal 311 and a second current output terminal 312, and the second current input terminal 311 and the second current output terminal 312 are arranged on two sides of the second metal shell 30. Wherein, the current input terminal and the current output terminal can be arranged on opposite sides of the metal shell.

[0047] That is, for the positive and negative electrode current, the metal shell has both input terminal and output terminal, so that the metal shell is used as both shell and electrode. When the metal shell generates heat, the influence of the current heat on the capacitor core 10 can be minimized by cooling the metal shell with a heat-conducting insulating pad.

[0048] Wherein, for the metal shell, including the first metal shell 20 and the second metal shell 30, when used as both shell and electrode, the surface area and thickness of the shell are larger than the conventional electrode, so that aluminum or aluminum alloy can be used as the shell (electrode) material.

[0049] According to a further embodiment of the present application, the first current output terminal 212 extends from a specified edge of the first metal shell 20 to the thickness direction of the first metal shell 20 and is bent to form, and the first current input terminal 211 extends from the specified edge of the first metal shell 20 to the direction perpendicular to the thickness direction of the first metal shell 20; the second current output terminal 312 extends from a specified edge of the second metal shell 30 to the thickness direction of the second metal shell 30 and is bent to form, and the second current input terminal 311 extends from the specified edge of the second metal shell 30 to the direction perpendicular to the thickness direction of the second metal shell 30.

[0050] That is, the first current input terminal 211 and the second current input terminal 311 are directly extended outward from the edge of the metal shell, and the extended terminals are flush with the metal shell in the horizontal direction; the first current output terminal 212 and the second current output terminal 313 are extended from the edge of the metal shell to the thickness direction of the metal shell and are bent. Understandably, the first current output terminal 212 and the second current output terminal 313 are both L-shaped.

[0051] When the first metal case 20 and the second metal case 30 are both one, the first metal case 20, the insulator 60, and the second metal case 30 are arranged from top to bottom for the entire housing of the film capacitor, and the first current output terminal 212 is bent downward after extending from a prescribed edge of the first metal case 20, and the second current output terminal 312 is bent upward after extending from a prescribed edge of the second metal case 30. Here, the first current output terminal 212 and the second current output terminal 312 are arranged offset from each other.

[0052] According to an embodiment of the present application, the first current output terminal 212 is a plurality and is arranged spaced apart from each other at a prescribed edge of the first metal case 20, and the second current output terminal 312 is a plurality and is arranged spaced apart from each other at a prescribed edge of the second metal case 30.

[0053] Further, the first current output terminal 212 and the second current output terminal 312 are both a plurality to constitute a plurality of pairs, and the first current output terminal 212 and the second current output terminal 312 in each pair are arranged adjacent to each other.

[0054] According to an embodiment of the present application, the insulator 60 has a first recess 61 and a second recess 62 facing in opposite directions, and the first metal case 20 has an edge adjacent to the insulator 60 embedded in the first recess 61, and the second metal case 30 has an edge adjacent to the insulator 60 embedded in the second recess 62.

[0055] Here, when only two metal cases are provided, the first metal case 20 and the second metal case 30 can be in a cap shape, and the bottom edge of the cap-shaped first metal case 20 is embedded in the first recess 61, and the top edge of the cap-shaped second metal case 30 is embedded in the second recess 62, so that the first metal case 20 and the second metal case 30 are spliced together by the insulator 60.

[0056] Further, the first recess 61 and the second recess 62 of the insulator 60 can be completely sealed and covered for the edges of the metal cases.

[0057] According to an embodiment of the present application, the first connecting tab 40 and the second connecting tab 50 are opposite to each other, and the capacitor core 10 is arranged between the first connecting tab 40 and the second connecting tab 50. That is, the first connecting tab 40 and the second connecting tab 50 are used as internal electrodes, and the lead terminals on the metal cases are used as external electrodes.

[0058] According to a further embodiment of the present application, the first connecting sheet 40 comprises a first connecting sheet body 41 connected with the capacitor core 10 and a first connecting terminal 42 protruding from the potting glue 70 and connected with the first current output terminal 212; the second connecting sheet 50 comprises a second connecting sheet body 51 connected with the capacitor core 10 and a second connecting terminal 52 protruding from the potting glue 70 and connected with the second current output terminal 312.

[0059] That is, the first connecting sheet 40 is connected with the capacitor core 10 through the first connecting sheet body 41 and connected with the first current output terminal 212 of the first metal shell 20 through the first connecting terminal 42. Similarly, the second connecting sheet 50 is connected with the capacitor core 10 through the second connecting sheet body 51 and connected with the second current output terminal 312 of the second metal shell 30 through the second connecting terminal 52.

[0060] Further, the first connecting sheet body 41 and the second connecting sheet body 51 are both provided with a third connecting terminal (43; 53) connected with the end face of the capacitor core 10. Wherein, the structure of the capacitor core 10 can be multiple cores arranged side by side, and the number of the third connecting terminal (43; 53) corresponds to the number of the cores.

[0061] In combination with Figure 2 and Figure 3 When the arrangement of the multiple cores in the capacitor core 10 is horizontal and side by side with the end faces upward and downward, the first connecting sheet body 41 and the second connecting sheet body 51 both have a protruding part (44; 54) facing the end face of the capacitor core 10, and the protruding part (44; 54) is attached to the end face of the capacitor core 10. Wherein, the end face of the capacitor core 10 is provided with a gold-plated surface, and the protruding part (44; 54) can ensure that the first connecting sheet body 41 or the second connecting sheet body 51 is attached to the gold-plated surface of the capacitor core 10. Further, the third connecting terminal (43; 53) is arranged on the protruding part (44; 54), so that the protruding part (44; 54) has a hollow structure. Wherein, the third connecting terminal (43; 53) can be connected with the end face of the capacitor core 10 by soldering. Thus, the protruding part (44; 54) is designed as a hollow structure, the connecting terminal in the hollow structure is relatively soft and has a certain plasticity, and is not easy to accumulate stress. When the connecting terminal is soldered with the gold-plated surface, the soldering point is on the connecting terminal, which can solve the problem of large stress when the traditional busbar is directly soldered with the core.

[0062] The structure and number of the first connecting terminal 42 and the second connecting terminal 43 can be the same as the first current output terminal 212 and the second current output terminal 312; the first connecting terminal 42 is stacked on the first current output terminal 212 after penetrating the potting glue and connected with the first current output terminal 212; the second connecting terminal 52 is stacked on the second current output terminal 312 after penetrating the potting glue and connected with the second current output terminal 312.

[0063] According to one embodiment of the present application, the first metal shell 20 is integrally formed with the first lead-out terminal 21; the second metal shell 30 is integrally formed with the second lead-out terminal 31. In this way, the assembly process can be simplified and the production efficiency can be improved.

[0064] Embodiment two

[0065] The structure and principle of the present embodiment are basically the same as those of the embodiment, and the same parts will not be described in detail. The difference lies in that, in combination with Figure 5 and Figure 6 , the arrangement of the plurality of capacitor cores 10 is that the end faces are forward and backward and horizontally side by side, the first connecting piece body 41 of the first connecting piece 40 is in the shape of L, the first connecting terminal 42 is arranged on the short limb of the first connecting piece body 41 in the shape of L, and the long limb of the first connecting piece body 41 in the shape of L is arranged horizontally, so that the first connecting terminal 42 can be welded with the plated surface of the capacitor core 10, and the connecting terminal is relatively soft and has a certain plasticity, so it is not easy to accumulate stress. When the connecting terminal is welded with the plated surface, the welding point is on the connecting terminal, which can solve the problem of large stress when the traditional busbar is directly welded with the core. Similarly, the second connecting piece body 51 of the second connecting piece 50 is in the shape of L, the second connecting terminal 52 is arranged on the short limb of the second connecting piece body 51 in the shape of L, and the long limb of the second connecting piece body 51 in the shape of L is arranged horizontally, so that the second connecting terminal 52 can be welded with the plated surface of the capacitor core 10, and the connecting terminal is relatively soft and has a certain plasticity, so it is not easy to accumulate stress. When the connecting terminal is welded with the plated surface, the welding point is on the connecting terminal, which can solve the problem of large stress when the traditional busbar is directly welded with the core.

[0066] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0067] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include one or more of the technical features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0068] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0070] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A thin film capacitor, characterized by, The capacitor core, the first metal shell, the second metal shell, the first connecting sheet and the second connecting sheet are arranged in the accommodating cavity and sealed by the potting glue. The first metal shell and the second metal shell are spliced together by the insulator to jointly define the accommodating cavity; the first metal shell is provided with a first lead-out terminal, and the second metal shell is provided with a second lead-out terminal; the insulator has a first groove and a second groove facing each other, the first metal shell is embedded in the first groove near the edge of the insulator, and the second metal shell is embedded in the second groove near the edge of the insulator. The first connecting sheet is connected with the capacitor core and the first metal shell. The second connecting sheet is connected with the capacitor core and the second metal shell. The capacitor core, the first connecting sheet and the second connecting sheet are arranged in the accommodating cavity and sealed by the potting glue.

2. The thin film capacitor of claim 1, wherein The first lead-out terminal comprises a first current input terminal and a first current output terminal, and the first current input terminal and the first current output terminal are arranged on two sides of the first metal shell; the second lead-out terminal comprises a second current input terminal and a second current output terminal, and the second current input terminal and the second current output terminal are arranged on two sides of the second metal shell.

3. The thin film capacitor of claim 2, wherein The first current output terminal extends from a specified edge of the first metal shell to the thickness direction of the first metal shell and is bent to form, and the first current input terminal extends from the specified edge of the first metal shell to a direction perpendicular to the thickness direction of the first metal shell; the second current output terminal extends from a specified edge of the second metal shell to the thickness direction of the second metal shell and is bent to form, and the second current input terminal extends from the specified edge of the second metal shell to a direction perpendicular to the thickness direction of the second metal shell.

4. The thin film capacitor of claim 2, wherein The first connecting sheet and the second connecting sheet are opposite to each other, and the capacitor core is arranged between the first connecting sheet and the second connecting sheet.

5. The thin film capacitor of claim 4, wherein The first connecting sheet comprises a first connecting sheet body and a first connecting terminal, the first connecting sheet body is connected with the capacitor core, and the first connecting terminal penetrates the potting glue and is connected with the first current output terminal; the second connecting sheet comprises a second connecting sheet body and a second connecting terminal, the second connecting sheet body is connected with the capacitor core, and the second connecting terminal penetrates the potting glue and is connected with the second current output terminal.

6. The thin film capacitor of claim 5, wherein The first connecting sheet body and the second connecting sheet body are both provided with a third connecting terminal connected with the end face of the capacitor core.

7. The thin film capacitor of claim 6 wherein, The first connecting sheet body and the second connecting sheet body both have a protruding part facing the end face of the capacitor core, and the protruding part is attached to the end face of the capacitor core.

8. The thin film capacitor of claim 7 wherein, The third connecting terminal is arranged on the protruding part.

9. The thin film capacitor of claim 1 wherein, The first metal shell and the first lead-out terminal are integrally formed; and the second metal shell and the second lead-out terminal are integrally formed.

10. The thin film capacitor of claim 2, wherein The first current output terminals are multiple and are arranged at prescribed edges of the first metal case at intervals from each other; the second current output terminals are multiple and are arranged at prescribed edges of the second metal case at intervals from each other.

11. The thin film capacitor of claim 10, wherein The first current output terminals and the second current output terminals are both multiple to constitute multiple pairs, and the first current output terminal and the second current output terminal in each pair are adjacent.

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