Film capacitor and metalization film

Abstract

To provide a film capacitor capable of suppressing deterioration of an electrostatic capacitance.SOLUTION: A film capacitor 1 comprises: a dielectric film 2 that includes a first surface 2a and a second surface 2b that is opposite to the first surface 2a; a first electrode 31 that is arranged on the first surface 2a; and a second electrode 32 that is arranged on the second surface 2b, and is opposite to the first electrode 31 via the dielectric film 2. The first electrode 31 contains: two adjacent small electrodes 4; and a fuse 5 that connects the two adjacent small electrodes 4. The fuse 5 includes a plurality of current paths P, and each of the plurality of current paths P connects the two adjacent small electrodes 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE This disclosure relates generally to film capacitors and metallized films, and more particularly to film capacitors and metallized films utilizing the film as a dielectric. [Background technology]

[0002] Patent Document 1 discloses a film capacitor. This film capacitor includes a dielectric film, a first electrode, and a second electrode. The dielectric film has a first surface and a second surface opposite to the first surface. The first electrode is disposed on the first surface of the dielectric film. The second electrode is disposed on the second surface of the dielectric film and faces the first electrode via the dielectric film. At least one of the first electrode and the second electrode includes a plurality of regions and a fuse. The fuse connects two adjacent regions of the plurality of regions.

[0003] In the film capacitor of Patent Document 1, if dielectric breakdown occurs during current flow, the fuse melts to restore the insulating state. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2023 / 013385 Summary of the Invention [Problem to be solved by the invention]

[0005] In the film capacitor of Patent Document 1, there is only one fuse connecting two adjacent regions among the multiple regions. In addition, the width of the fuse is usually narrow. Therefore, there is a risk that the fuse may be missing due to some cause other than dielectric breakdown before dielectric breakdown occurs. Although such missing fuses are acceptable as a manufacturing tolerance, they lead to a decrease in capacitance, so there is a demand to reduce them as much as possible.

[0006] An object of the present disclosure is to provide a film capacitor and a metallized film that can suppress a decrease in capacitance. [Means for solving the problem]

[0007] A film capacitor according to one embodiment of the present disclosure includes a dielectric film having a first surface and a second surface opposite to the first surface, a first electrode disposed on the first surface, and a second electrode disposed on the second surface and facing the first electrode via the dielectric film. The first electrode includes two adjacent small electrodes and a fuse connecting the two adjacent small electrodes. The fuse has a plurality of current paths, and each of the plurality of current paths connects the two adjacent small electrodes.

[0008] A film capacitor according to an embodiment of the present disclosure includes a dielectric film having a first surface and a second surface opposite to the first surface, a first electrode disposed on the first surface, and a second electrode disposed on the second surface and facing the first electrode via the dielectric film. The first electrode includes a first divided electrode divided into a plurality of first small electrodes arranged in a first direction and a second direction perpendicular to the first direction, a first undivided electrode arranged in the first direction with the first divided electrode, and a plurality of first fuses connecting two first small electrodes adjacent to each other in the first direction among the plurality of first small electrodes. Each of the plurality of first fuses has a plurality of current paths, and each of the plurality of current paths connects two first small electrodes adjacent to each other in the first direction.

[0009] A metallized film according to one embodiment of the present disclosure includes a dielectric film and an electrode disposed on the dielectric film. The electrode includes two adjacent small electrodes and a fuse connecting the two adjacent small electrodes. The fuse has a plurality of current paths, each of which connects the two adjacent small electrodes. Effect of the Invention

[0010] According to the present disclosure, the decrease in capacitance can be suppressed. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is an explanatory diagram showing a film capacitor according to a first embodiment. [Diagram 2] FIG. 2 is an explanatory diagram showing a main part of the film capacitor. [Diagram 3] FIG. 3 is an explanatory diagram showing a film capacitor according to a second embodiment. [Figure 4] FIG. 4 is an explanatory diagram showing a film capacitor according to a third embodiment. [Diagram 5] FIG. 5 is an explanatory diagram showing a main part of the film capacitor. [Figure 6] FIG. 6 is an explanatory diagram showing a film capacitor according to a fourth embodiment. [Figure 7] 7A and 7B are explanatory diagrams showing variations of the fuse. [Figure 8] 8A and 8B are explanatory diagrams showing other variations of the fuse. [Figure 9] 9A and 9B are explanatory diagrams showing still another variation of the fuse. [Figure 10] Fig. 10A is a schematic perspective view showing an example of the film capacitor according to the first embodiment, and Fig. 10B is a schematic perspective view showing a state in the middle of manufacturing the film capacitor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] 1. Overview 10A shows an example of the film capacitor 1 according to this embodiment. The film capacitor 1 has, for example, a flattened cylindrical shape.

[0013] The above-mentioned film capacitor 1 is manufactured, for example, as shown in Fig. 10B. First, two elongated metallized films 10 (first metallized film 11 and second metallized film 12) are overlapped and wound to form a cylindrical body 100.

[0014] Here, first metallized film 11 includes dielectric film 2 (first dielectric film 21) and electrode 3 (first electrode 31). First electrode 31 is disposed on one side of first dielectric film 21. First electrode 31 is illustrated in a simplified manner in FIG. 10B, but in detail, first electrode 31 includes a plurality of small electrodes 4 (first small electrodes 41) and a fuse (first fuse 51) as shown in FIG. 1. First fuse 51 connects two adjacent first small electrodes 41 to each other. Specifically, as shown in FIG. 2, first fuse 51 has a plurality of current paths P, and each of the plurality of current paths P connects two adjacent first small electrodes 41 to each other.

[0015] On the other hand, second metallized film 12 includes dielectric film 2 (second dielectric film 22) and electrode 3 (second electrode 32). Second electrode 32 is disposed on one side of second dielectric film 22. Like first electrode 31, second electrode 32 is also illustrated in a simplified manner in FIG. 10B, but in detail, second electrode 32 includes a plurality of small electrodes 4 (second small electrodes 42) and fuse 5 (second fuse 52) as shown in FIG. 1. Second fuse 52 connects two adjacent second small electrodes 42 together. Specifically, like first fuse 51, second fuse 52 also has a plurality of current paths P, and each of the plurality of current paths P connects two adjacent second small electrodes 42 together.

[0016] Next, the side surface of the cylinder 100 shown in Fig. 10B is pressed and flattened to obtain a flat cylinder 110 (see Fig. 10A). After that, a metal is sprayed onto both bottom surfaces (both end surfaces) of the flat cylinder 110 to form a first end surface electrode 91 and a second end surface electrode 92, thereby obtaining a film capacitor 1.

[0017] In the above-described film capacitor 1, the first electrode 31 and the second electrode 32 face each other via the dielectric film 2. A first end surface electrode 91 and a second end surface electrode 92 are present at both ends of the film capacitor 1. The first end surface electrode 91 is connected to the first electrode 31. Meanwhile, the second end surface electrode 92 is connected to the second electrode 32. By applying a voltage between the first end surface electrode 91 and the second end surface electrode 92, the film capacitor 1 can be charged.

[0018] 2, in this embodiment, the fuse 5 has a plurality of current paths P, and each of the plurality of current paths P connects two adjacent small electrodes 4. Here, when a dielectric breakdown occurs in any of the small electrodes 4, the fuse 5 melts to recover the insulating state. At this time, all of the current paths P of the fuse 5 are cut off.

[0019] Furthermore, even if some of the current paths P (e.g., current path P1) are lost due to some cause other than dielectric breakdown before dielectric breakdown occurs, the remaining current path P (e.g., current path P2) connects two adjacent small electrodes 4 to each other.

[0020] Therefore, according to this embodiment, the decrease in capacitance of the film capacitor 1 can be suppressed.

[0021] 2.Details (1) First embodiment <Film capacitor> Hereinafter, a film capacitor 1 according to a first embodiment will be described with reference to Fig. 1 and Fig. 2. Each figure is a schematic diagram, and the ratio of the size and thickness of each component in each figure does not necessarily reflect the actual dimensional ratio.

[0022] The arrows indicating the directions in each figure are not intended to define the directions when the film capacitor 1 is used, but are merely depicted to facilitate understanding of the description, and have no substance. The first direction D1, the second direction D2, and the third direction D3 are mutually perpendicular (see FIG. 10B). The first direction D1 is the short-side direction (width direction) of the dielectric film 2, and may be referred to as the "left-right direction". One side of the first direction D1 means "left", and the other side of the first direction D1 means "right". The second direction D2 is the longitudinal direction of the dielectric film 2, and may be referred to as the "front-rear direction". One side of the second direction D2 means "front", and the other side of the second direction D2 means "rear". The third direction D3 is the thickness direction of the dielectric film 2, and may be referred to as the "up-down direction". One side of the third direction D3 means "up", and the other side of the third direction D3 means "down". A view along the third direction D3 is referred to as a planar view. The same applies to embodiments other than the first embodiment.

[0023] Fig. 1 is an explanatory diagram showing a film capacitor 1 according to the present embodiment. Specifically, in order to facilitate understanding of the following description, Fig. 1 illustrates two metallized films 10 (first metallized film 11 and second metallized film 12) that are not wound but are stacked with a shift in the front-to-rear direction.

[0024] The film capacitor 1 according to this embodiment includes a dielectric film 2, a first electrode 31, and a second electrode 32. The film capacitor 1 may further include a first end surface electrode 91 and a second end surface electrode 92 (see FIG. 10A). Note that the first end surface electrode 91 and the second end surface electrode 92 are not shown in FIG.

[0025] The dielectric film 2, the first electrode 31, the second electrode 32, the first end surface electrode 91, and the second end surface electrode 92 will be described in order below.

[0026] <Dielectric film> The dielectric film 2 is a film made of a dielectric material, which is not particularly limited, but examples thereof include polypropylene (PP) and polyethylene terephthalate (PET).

[0027] The dielectric film 2 is in the form of an elongated film. That is, the dielectric film 2 is a film having a width in the left-right direction, extending in the front-rear direction, and having a thickness in the up-down direction.

[0028] The dielectric film 2 has a first surface 2a and a second surface 2b (see FIG. 10B). The first surface 2a is the upper surface. The second surface 2b is the surface opposite to the first surface 2a. In other words, the second surface 2b is the lower surface.

[0029] The thickness of the dielectric film 2 is the distance between the first surface 2a and the second surface 2b. The thickness of the dielectric film 2 is not particularly limited, but is, for example, not less than 1.0 μm and not more than 10.0 μm.

[0030] In this embodiment, the dielectric film 2 includes a first dielectric film 21 and a second dielectric film 22. The first dielectric film 21 and the second dielectric film 22 have approximately the same shape and size. As shown in FIG. 1, the first dielectric film 21 and the second dielectric film 22 are misaligned in the left-right direction. Specifically, the left edge 21L of the first dielectric film 21 is located to the left of the left edge 22L of the second dielectric film 22. On the other hand, the right edge 22R of the second dielectric film 22 is located to the right of the right edge 21R of the first dielectric film 21.

[0031] First dielectric film 21 constitutes a part of first metallized film 11, and second dielectric film 22 constitutes a part of second metallized film 12.

[0032] ≪First electrode≫ The first electrode 31 may be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode. The material of the first electrode 31 is not particularly limited, but may be, for example, aluminum (Al), magnesium (Mg), or an alloy thereof. The thickness of the first electrode 31 is not particularly limited, but may be, for example, 5 nm or more and 100 nm or less.

[0033] The first electrode 31 is disposed on the first surface 2a of the dielectric film 2 (the first dielectric film 21 in this embodiment). Specifically, as shown in Fig. 1, the first electrode 31 is disposed on the first surface 2a except for the first margin portion 20a. As described above, the left side edge 21L of the first dielectric film 21 is located to the left of the left side edge 22L of the second dielectric film 22, thereby strengthening the connection between the first electrode 31 and the first end surface electrode 91.

[0034] The first margin portion 20a is present at the right end portion on the first surface 2a of the first dielectric film 21. The first margin portion 20a is a narrow strip-shaped portion. That is, the first margin portion 20a has a width in the left-right direction and extends in the front-rear direction.

[0035] First electrode 31 includes a first divided electrode 61, a first undivided electrode 71, and a plurality of first fuses 51. First electrode 31 forms a part of first metallized film 11.

[0036] [First divided electrode] The first split electrode 61 occupies approximately the right half of the first surface 2a of the dielectric film 2 (first dielectric film 21 in this embodiment). The first split electrode 61 is present between the first margin portion 20a and the first non-split electrode 71. The first split electrode 61 includes a plurality of first small electrodes 41. In this manner, the first split electrode 61 is split into a plurality of first small electrodes 41.

[0037] The multiple first small electrodes 41 are arranged in a matrix. That is, the multiple first small electrodes 41 are lined up in a first direction D1 (left-right direction) and a second direction D2 (front-back direction). In this embodiment, four first small electrodes 41 are lined up in the left-right direction. The number of first small electrodes 41 lined up in the left-right direction is not particularly limited as long as it is more than one.

[0038] In this embodiment, each of the first small electrodes 41 has a rectangular shape of approximately the same size. In the first small electrodes 41, two sides (left and right sides) opposing each other in the left-right direction extend in the front-rear direction, and two sides (front and rear sides) opposing each other in the front-rear direction extend in the left-right direction.

[0039] [First non-divided electrode] The first undivided electrode 71 occupies approximately the left half of the first surface 2a of the dielectric film 2 (first dielectric film 21 in this embodiment). As such, the first undivided electrode 71 is aligned with the first divided electrode 61 in the first direction D1 (left-right direction). The first undivided electrode 71 is solid and extends in the front-rear direction. As such, the first undivided electrode 71 is not divided.

[0040] [First fuse] The first fuse 51 is a part that melts when an excessive current flows to break the circuit. In this embodiment, the first fuse 51 connects two first small electrodes 41 adjacent to each other in the first direction D1 (left-right direction) among the multiple first small electrodes 41.

[0041] 2, the first fuse 51 has multiple (two in this embodiment) current paths P. A current path P is a path through which a current flows. The multiple current paths P have approximately the same width. The specific width of the current path P can be set appropriately as necessary. Each of the multiple current paths P connects two first small electrodes 41 adjacent to each other in the first direction D1 (left-right direction).

[0042] Specifically, as shown in FIG. 2, the current path P1 is a straight line extending in the left-right direction in a plan view. A left end L1 of the current path P1 is on the right side of the first small electrode 41 on the left side. A right end R1 of the current path P1 is on the left side of the first small electrode 41 on the right side. Meanwhile, the current path P2 is also a straight line extending in the left-right direction in a plan view. A left end L2 of the current path P2 is on the right side of the first small electrode 41 on the left side. A right end R2 of the current path P2 is on the left side of the first small electrode 41 on the right side. The current path P2 is parallel to the current path P1.

[0043] 1, the first fuse 51 connects the first small electrodes 41, among the multiple first small electrodes 41, adjacent to each other in the first direction D1 (left-right direction) to the first undivided electrode 71. In this case, the first fuse 51 also has multiple (two in this embodiment) current paths P. Each of the multiple current paths P connects the first small electrodes 41 and the first undivided electrode 71 adjacent to each other in the first direction D1 (left-right direction). The shape of the first fuse 51 in this case is the same as the shape of the first fuse 51 shown in FIG. 2.

[0044] Thus, this embodiment includes cases where the connection targets of the first fuse 51 are two adjacent first small electrodes 41, and cases where the connection targets are two adjacent first small electrodes 41 and a first non-divided electrode 71.

[0045] ≪Second electrode≫ The second electrode 32 may be any one of a vapor deposition electrode, a metal foil electrode, and a plated electrode, similar to the first electrode 31. The material and thickness of the second electrode 32 are the same as those of the first electrode 31.

[0046] The second electrode 32 is disposed on the second surface 2b of the dielectric film 2 (the first dielectric film 21 in this embodiment). The second electrode 32 faces the first electrode 31 with the dielectric film 2 interposed therebetween.

[0047] However, it can also be said that the second electrode 32 is disposed on the first surface 2a of the second dielectric film 22. Therefore, hereinafter, unless otherwise specified, this case will be described. As shown in Fig. 1, the second electrode 32 is disposed on the first surface 2a of the second dielectric film 22, except for the second margin portion 20b. As described above, the right edge 22R of the second dielectric film 22 is located to the right of the right edge 21R of the first dielectric film 21, thereby strengthening the connection between the second electrode 32 and the second end surface electrode 92.

[0048] The second margin portion 20b is present at the left end portion on the first surface 2a of the second dielectric film 22. The second margin portion 20b is a narrow strip-shaped portion. That is, the second margin portion 20b has a width in the left-right direction and extends in the front-rear direction.

[0049] Second electrode 32 includes a second divided electrode 62, a second undivided electrode 72, and a plurality of second fuses 52. Second electrode 32 forms a part of second metallized film 12.

[0050] [Second split electrode] The second split electrode 62 occupies approximately the left half of the first surface 2a of the dielectric film 2 (the second dielectric film 22 in this embodiment). The second split electrode 62 is present between the second margin portion 20b and the second non-split electrode 72. The second split electrode 62 includes a plurality of second small electrodes 42. In this manner, the second split electrode 62 is split into a plurality of second small electrodes 42.

[0051] The second small electrodes 42 are arranged in a matrix. That is, the second small electrodes 42 are lined up in a first direction D1 (left-right direction) and a second direction D2 (front-back direction). In this embodiment, four second small electrodes 42 are lined up in the left-right direction. The number of second small electrodes 42 lined up in the left-right direction is not particularly limited as long as there is more than one. In this embodiment, the second small electrodes 42 have approximately the same shape and size as the first small electrodes 41, but are not particularly limited.

[0052] The second divided electrode 62 faces the first undivided electrode 71 via the dielectric film 2. More specifically, the multiple second small electrodes 42 face the first undivided electrode 71 via the dielectric film 2.

[0053] A portion of the second divided electrode 62 faces the first divided electrode 61 via the dielectric film 2. Specifically, the second small electrode 42 adjacent to the second undivided electrode 72 faces the first small electrode 41 adjacent to the first undivided electrode 71 via the dielectric film 2.

[0054] [Second non-divided electrode] The second undivided electrode 72 occupies approximately the right half of the first surface 2a of the dielectric film 2 (the second dielectric film 22 in this embodiment). As such, the second undivided electrode 72 is aligned with the second divided electrode 62 in the first direction D1 (left-right direction). The second undivided electrode 72 is solid and extends in the front-rear direction. As such, the second undivided electrode 72 is not divided.

[0055] The second undivided electrode 72 faces the first divided electrode 61 via the dielectric film 2. More specifically, the second undivided electrode 72 faces the multiple first small electrodes 41 included in the first divided electrode 61 via the dielectric film 2. However, the second undivided electrode 72 does not face the first undivided electrode 71 via the dielectric film 2.

[0056] [Second fuse] Like the first fuse 51, the second fuse 52 is a part that melts and breaks the circuit when an excessive current flows. As shown in Fig. 1, in this embodiment, the second fuse 52 connects two second small electrodes 42 adjacent to each other in the first direction D1 (left-right direction) among the multiple second small electrodes 42. While the above-mentioned first fuse 51 connects two adjacent first small electrodes 41 to each other, the second fuse 52 connects two adjacent second small electrodes 42 to each other.

[0057] Like the first fuse 51, the second fuse 52 has a plurality of (two in this embodiment) current paths P. Each of the plurality of current paths P connects two second small electrodes 42 adjacent to each other in the first direction D1 (left-right direction). In this case, the shape of the second fuse 52 is the same as the shape of the first fuse 51 shown in FIG.

[0058] 1, the second fuse 52 connects adjacent second small electrodes 42 in the first direction D1 (left-right direction) to the second undivided electrode 72 among the multiple second small electrodes 42. In this case, the second fuse 52 also has multiple (two in this embodiment) current paths P. Each of the multiple current paths P connects adjacent second small electrodes 42 in the first direction D1 (left-right direction) to the second undivided electrode 72. The shape of the second fuse 52 in this case is also the same as the shape of the first fuse 51 shown in FIG.

[0059] Thus, this embodiment includes a case where the connection targets of the second fuse 52 are adjacent second small electrodes 42, and a case where the connection targets are adjacent second small electrodes 42 and second non-divided electrodes 72.

[0060] ≪First end electrode≫ 10A, the first end surface electrode 91 is disposed on the left side of the film capacitor 1. The first end surface electrode 91 is connected to the first electrode 31. Specifically, the first end surface electrode 91 is connected to the first non-divided electrode 71 included in the first electrode 31. The first end surface electrode 91 is not connected to the second electrode 32. This is because the second margin portion 20b exists between the first end surface electrode 91 and the second electrode 32.

[0061] The material of the first end surface electrode 91 is not particularly limited, but may be, for example, zinc (Zn), tin (Sn), or an alloy thereof. The thickness of the first end surface electrode 91 is not particularly limited, but may be, for example, 0.5 mm or more and 1.5 mm or less. The method of forming the first end surface electrode 91 is not particularly limited, but may be, for example, metal spraying.

[0062] ≪Second end electrode≫ 10A, the second end surface electrode 92 is disposed on the right side of the film capacitor 1. The second end surface electrode 92 is connected to the second electrode 32. Specifically, the second end surface electrode 92 is connected to the second non-divided electrode 72 included in the second electrode 32. The second end surface electrode 92 is not connected to the first electrode 31. This is because the first margin portion 20a exists between the second end surface electrode 92 and the first electrode 31.

[0063] The material, thickness and formation method of the second end surface electrode 92 are similar to the material, thickness and formation method of the first end surface electrode 91.

[0064] <Metallized film> Next, a description will be given of metallized film 10 according to the present embodiment. Metallized film 10 is suitable for use in producing film capacitor 1 described above.

[0065] Metallized film 10 includes dielectric film 2 and electrode 3 (see FIG. 10B). Here, metallized film 10 is a general term for first metallized film 11 and second metallized film 12. First metallized film 11 and second metallized film 12 are in a left-right reversed relationship (see FIG. 1). Therefore, by flipping first metallized film 11 left-right, second metallized film 12 can be substituted for first metallized film 11.

[0066] <Dielectric film> Dielectric film 2 is a general term for first dielectric film 21 and second dielectric film 22. As described above, first dielectric film 21 forms a part of first metallized film 11, and second dielectric film 22 forms a part of second metallized film 12.

[0067] ≪Electrode≫ Electrode 3 is disposed on dielectric film 2. Here, electrode 3 is a collective term for first electrode 31 and second electrode 32. Therefore, for first metallized film 11, first electrode 31 is disposed on first dielectric film 21. On the other hand, for second metallized film 12, second electrode 32 is disposed on second dielectric film 22.

[0068] The electrode 3 includes two adjacent small electrodes 4 and a fuse 5. Here, the small electrodes 4 are a collective term for a first small electrode 41 and a second small electrode .

[0069] 〔fuse〕 The fuse 5 is a general term for the first fuse 51 and the second fuse 52. The fuse 5 connects two adjacent small electrodes 4 together. As described above, the first fuse 51 connects the first small electrodes 41 together. Furthermore, the first fuse 51 connects the first small electrodes 41 and the first non-split electrode 71. Meanwhile, the second fuse 52 connects the second small electrodes 42 together. Furthermore, the second fuse 52 connects the second small electrodes 42 and the second non-split electrode 72.

[0070] Fuse 5 has multiple current paths P, and each of the multiple current paths P connects two adjacent small electrodes 4. In first metallized film 11, first fuse 51 has multiple current paths P, and each of the multiple current paths P connects two adjacent first small electrodes 41, and between adjacent first small electrodes 41 and first unsplit electrodes 71. In second metallized film 12, second fuse 52 has multiple current paths P, and each of the multiple current paths P connects two adjacent second small electrodes 42, and between adjacent second small electrodes 42 and second unsplit electrodes 72.

[0071] <Action and effect> 2, in this embodiment, the fuse 5 has a plurality of current paths P, and each of the plurality of current paths P connects two adjacent small electrodes 4. Here, when a dielectric breakdown occurs in any of the small electrodes 4, the fuse 5 melts to recover the insulating state. At this time, all of the current paths P in the fuse 5 are cut off.

[0072] Even if some of the current paths P (for example, current path P1) are lost due to some cause other than dielectric breakdown before the occurrence of dielectric breakdown, the remaining current paths P (for example, current path P2) connect two adjacent small electrodes 4 to each other. Therefore, according to this embodiment, it is possible to suppress a decrease in the capacitance of the film capacitor 1.

[0073] Furthermore, compared to when the fuse 5 has only a single current path P, when the fuse 5 has multiple current paths P, the electrical resistance of the fuse 5 as a whole is more likely to be smaller. Therefore, heat generation in the film capacitor 1 during current flow can be reduced.

[0074] (2) Second embodiment <Film capacitor> Next, a film capacitor 1 according to a second embodiment will be described with reference to FIG. 3. In the second embodiment, components similar to those in the first embodiment are given the same reference numerals as in the first embodiment, and detailed description thereof may be omitted. Components in the second embodiment that are not specifically mentioned are similar to those in the first embodiment. Note that the first end surface electrode 91 and the second end surface electrode 92 are not shown in FIG. 3.

[0075] The second embodiment differs from the first embodiment in that the first electrode 31 further includes a plurality of third fuses 53, and the second electrode 32 further includes a plurality of fourth fuses .

[0076] [Third fuse] As shown in FIG. 3, the third fuse 53 connects two of the multiple first small electrodes 41 that are adjacent to each other in the second direction D2 (front-rear direction).

[0077] Like the first fuse 51 and the second fuse 52, the third fuse 53 also has a plurality of (two in this embodiment) current paths P. Each of the plurality of current paths P connects two first small electrodes 41 adjacent to each other in the second direction D2 (front-rear direction). The shape of the third fuse 53 in this case is the same as the shape of the first fuse 51 shown in FIG. 2, except for the orientation.

[0078] [Fourth fuse] As shown in FIG. 3, the fourth fuse 54 connects two of the multiple second small electrodes 42 that are adjacent to each other in the second direction D2 (front-rear direction).

[0079] Like the third fuse 53, the fourth fuse 54 also has a plurality of (two in this embodiment) current paths P. Each of the plurality of current paths P connects two second small electrodes 42 adjacent to each other in the second direction D2 (front-rear direction). The shape of the fourth fuse 54 in this case is the same as the shape of the first fuse 51 shown in FIG. 2, except for the orientation.

[0080] <Metallized film> Metallized film 10 according to the present embodiment differs from metallized film 10 according to the first embodiment in the following respects. That is, first metallized film 11 according to the present embodiment differs from first metallized film 11 according to the first embodiment in that first electrode 31 further includes a plurality of third fuses 53. Meanwhile, second metallized film 12 according to the present embodiment differs from second metallized film 12 according to the first embodiment in that second electrode 32 further includes a plurality of fourth fuses 54. Other respects are similar to those of the first embodiment.

[0081] <Action and effect> This embodiment also has the same effects as the first embodiment.

[0082] Furthermore, according to this embodiment, it is possible to suppress an excessive decrease in the capacitance of the film capacitor 1 upon dielectric breakdown for the following reasons.

[0083] For example, consider the case where dielectric breakdown occurs in one small electrode 4 surrounded by dashed line X1 in Fig. 1. In this case, the first fuses 51 on both the left and right sides of the small electrode 4 surrounded by dashed line X1 may melt. This may result in the three small electrodes 4 surrounded by dashed line Y1 becoming isolated. This may result in a decrease in capacitance corresponding to these three small electrodes 4.

[0084] In contrast, in this embodiment, as shown in Fig. 3, a third fuse 53 is provided for each small electrode 4. Therefore, even if a dielectric breakdown occurs in a portion of one small electrode 4 surrounded by the dashed dotted line X2, and the first fuses 51 on both the left and right sides of this small electrode 4 and the third fuses 53 in front and behind are blown, the isolation of the three small electrodes 4 surrounded by the dashed dotted line Y2 is suppressed. This is because each of these three small electrodes 4 is connected to the small electrodes 4 adjacent in the front-rear direction by the third fuses 53. As a result, the capacitance is reduced only by an amount equivalent to one small electrode 4 surrounded by the dashed dotted line X2.

[0085] Therefore, according to this embodiment, it is possible to prevent an excessive decrease in the capacitance of the film capacitor 1 when a dielectric breakdown occurs.

[0086] (3) Third embodiment <Film capacitor> Next, a film capacitor 1 according to a third embodiment will be described with reference to Figs. 4 and 5. In the third embodiment, components similar to those in the first and second embodiments are given the same reference numerals as in the first and second embodiments, and detailed description thereof may be omitted. Components in the third embodiment that are not mentioned in particular are similar to those in the first and second embodiments. Note that the first end surface electrode 91 and the second end surface electrode 92 are not shown in Fig. 4.

[0087] The first fuse 51 and the second fuse 52 of the third embodiment differ from the first fuse 51 and the second fuse 52 of the first embodiment in that a branch point B is shared by a plurality of current paths P.

[0088] [First fuse] 4 and 5, the first fuse 51 has an X-shape in a plan view. The first fuse 51 has a plurality of (four in this embodiment) current paths P. The plurality of current paths P share a branch point B. The plurality of current paths P branch off at the branch point B. Each of the plurality of current paths P connects two first small electrodes 41 adjacent to each other in the first direction D1 (left-right direction).

[0089] The four current paths P will be described with reference to FIG. 5. On the right side of the first small electrode 41 on the left side, the left end L1 and the left end L2 are located in this order from the rear to the front. On the left side of the first small electrode 41 on the right side, the right end R1 and the right end R2 are located in this order from the rear to the front. An imaginary line passing through the left end L1 and the right end R1, and an imaginary line passing through the left end L2 and the right end R2 are parallel to the left-right direction. A branch point B is located at a position equidistant from the left end L1, L2 and the right end R1, R2. In other words, the branch point B is located at a position where a straight path connecting the left end L1 and the right end R2 and a straight path connecting the left end L2 and the right end R1 intersect.

[0090] The first current path P is a path that passes through the left end L1, the branch point B, and the right end R1, and is V-shaped in plan view. The second current path P is a path that passes through the left end L1, the branch point B, and the right end R2, and is a straight line that slopes downward to the right in plan view. The third current path P is a path that passes through the left end L2, the branch point B, and the right end R1, and is a straight line that slopes upward to the right in plan view. The fourth current path P is a path that passes through the left end L2, the branch point B, and the right end R2, and is an inverted V-shaped in plan view.

[0091] [Second fuse] 4, like the first fuse 51, the second fuse 52 also has an X-shape in a plan view. That is, the second fuse 52 also has a plurality of current paths P (four in this embodiment). The plurality of current paths P share a branch point B. The plurality of current paths P branch off at the branch point B. Each of the plurality of current paths P connects two second small electrodes 42 adjacent to each other in the first direction D1 (left-right direction). The shape of the second fuse 52 in this case is the same as the shape of the first fuse 51 shown in FIG.

[0092] <Metallized film> Metalized film 10 according to the present embodiment differs from metalized film 10 according to the first embodiment in that first fuse 51 and second fuse 52 are X-shaped in plan view. Specifically, metalized film 10 according to the present embodiment differs from metalized film 10 according to the first embodiment in that multiple current paths P in each of first fuse 51 and second fuse 52 share branch point B. Other points are similar to those of the first embodiment.

[0093] <Action and effect> This embodiment also has the same effects as the first embodiment.

[0094] Furthermore, in this embodiment, the multiple current paths P of the fuse 5 share the branch point B. Here, when a dielectric breakdown occurs, the current flows in a dispersed manner through the multiple current paths P, but the current may join and increase at the branch point B. In this way, the presence of the branch point B makes it easier to increase the current locally. Therefore, when a dielectric breakdown occurs, the fuse 5 is more likely to melt at the branch point B.

[0095] (4) Fourth embodiment <Film capacitor> Next, a film capacitor 1 according to a fourth embodiment will be described with reference to FIG. 6. In the fourth embodiment, components similar to those in the first to third embodiments are given the same reference numerals as in the first to third embodiments, and detailed description thereof may be omitted. Components in the fourth embodiment that are not specifically mentioned are similar to those in the first to third embodiments. Note that the first end surface electrode 91 and the second end surface electrode 92 are not shown in FIG. 6.

[0096] The fourth embodiment is common to the second embodiment and different from the third embodiment in that the first electrode 31 further includes a plurality of third fuses 53 and the second electrode 32 further includes a plurality of fourth fuses 54.

[0097] [Third fuse] The shape of third fuse 53 is the same as that of first fuse 51 shown in FIG. 5, except for the orientation.

[0098] [Fourth fuse] The shape of the fourth fuse 54 is also the same as the shape of the first fuse 51 shown in FIG. 5, except for the orientation.

[0099] <Metallized film> Metallized film 10 according to the present embodiment differs from metallized film 10 according to the third embodiment in the following respects. That is, first metallized film 11 according to the present embodiment differs from first metallized film 11 according to the third embodiment in that first electrode 31 further includes a plurality of third fuses 53. Meanwhile, second metallized film 12 according to the present embodiment differs from second metallized film 12 according to the third embodiment in that second electrode 32 further includes a plurality of fourth fuses 54. Other respects are similar to those of the third embodiment.

[0100] <Action and effect> This embodiment also has the same effects as the first to third embodiments.

[0101] (5) Fuse variations 7A to 9B, variations of the fuse 5 will be described. The fuse 5 described below can be used in place of the first fuse 51, the second fuse 52, the third fuse 53, and the fourth fuse 54 of the first to fourth embodiments.

[0102] <1> The fuse shown in FIG. First, the fuse 5 shown in Fig. 7A will be described. The fuse 5 has a sideways V shape in a plan view. The fuse 5 has two current paths P.

[0103] The first current path P1 is a path that passes through the left end L1 and the right end R, and forms a straight line sloping downward to the right in a plan view. On the other hand, the second current path P2 is a path that passes through the left end L2 and the right end R, and forms a straight line sloping upward to the right in a plan view.

[0104] Here, the left end L1 and the left end L2 are located in that order from the rear to the front on the right side of the left small electrode 4. The right end R is located on the left side of the right small electrode 4 at a position equidistant from the left end L1 and the left end L2.

[0105] As described above, the two current paths P share one branch point B. This branch point B is located at the same position as the right end R. In this manner, the branch point B may be located on the periphery of the small electrode 4.

[0106] <2> The fuse shown in FIG. 7B will be described. The fuse 5 has a sideways Y shape in a plan view. The fuse 5 has two current paths P.

[0107] The first current path P1 is a path that passes through the left end L1, the branch point B, and the right end R. On the other hand, the second current path P2 is a path that passes through the left end L2, the branch point B, and the right end R.

[0108] Here, the left end L1 and the left end L2 are located in that order from rear to front on the right side of the left small electrode 4. The branch point B is located at a position equidistant from the left end L1 and the left end L2 between the right side of the left small electrode 4 and the left side of the right small electrode 4. The right end R is located at a position equidistant from the left end L1 and the left end L2 on the left side of the right small electrode 4.

[0109] As described above, the two current paths P share one branch point B. Furthermore, the two current paths P share not only the branch point B, but also the section connecting the branch point B and the right end portion R. In this way, the two current paths P are distinguished even if they share some sections.

[0110] <3> The fuse shown in FIG. Next, the fuse 5 shown in Fig. 8A will be described. The fuse 5 is H-shaped in a plan view. The fuse 5 has four current paths P.

[0111] The first current path P is a path that passes through the left end L1, the branch point B1, the branch point B2, and the right end R1. The second current path P is a path that passes through the left end L1, the branch point B1, the branch point B2, and the right end R2. The third current path P is a path that passes through the left end L2, the branch point B1, the branch point B2, and the right end R1. The fourth current path P is a path that passes through the left end L2, the branch point B1, the branch point B2, and the right end R2.

[0112] Here, the left end L1 and the left end L2 are located on the right side of the left small electrode 4 in order from the rear to the front. The right end R1 and the right end R2 are located on the left side of the right small electrode 4 in order from the rear to the front. The imaginary line passing through the left end L1 and the right end R1, and the imaginary line passing through the left end L2 and the right end R2 are parallel to the left-right direction. The branch point B1 is located at a position equidistant from the left end L1 and the left end L2 between the right side of the left small electrode 4 and the left side of the right small electrode 4. The branch point B2 is located to the right of the branch point B1 between the right side of the left small electrode 4 and the left side of the right small electrode 4, and is located at a position equidistant from the right end R1 and the right end R2. The branch points B1 and B2 are lined up in the left-right direction.

[0113] As described above, the four current paths P share two branch points B (branch point B1 and branch point B2). Furthermore, the four current paths P share not only branch point B1 and branch point B2, but also a linear section that passes through branch point B1 and branch point B2 and extends in the left-right direction in a plan view.

[0114] <4> The fuse shown in FIG. Next, the fuse 5 shown in Fig. 8B will be described. The fuse 5 has four current paths P.

[0115] The first current path P is a path that passes through the left end L1, the branch point B, and the right end R1. The second current path P is a path that passes through the left end L1, the branch point B, and the right end R2. The third current path P is a path that passes through the left end L2, the branch point B, and the right end R1, and forms a straight line extending in the left-right direction in a plan view. The fourth current path P is a path that passes through the left end L2, the branch point B, and the right end R2.

[0116] Here, the left end L1 and the left end L2 are present on the right side of the left small electrode 4 in order from the rear to the front. The right end R1 and the right end R2 are present on the left side of the right small electrode 4 in order from the rear to the front. A virtual line passing through the left end L2 and the right end R1 extends in the left-right direction. The left end L1 is located behind the virtual line passing through the left end L2 and the right end R1. The right end R2 is located ahead of the virtual line passing through the left end L2 and the right end R1. The section connecting the left end L1 and the branch point B forms an inverted L shape in a plan view. In this way, the section connecting the left end L1 and the branch point B is not linear, but is bent halfway. On the other hand, the section connecting the branch point B and the right end R2 forms an L shape in a plan view. In this way, the section connecting the branch point B and the right end R2 is also not linear, but is bent halfway.

[0117] As described above, the four current paths P share one branch point B. The branch point B is located at a position equidistant from the left end L2 and the right end R1. Furthermore, the branch point B is located at a position equidistant from the left end L1 and the right end R2.

[0118] <5> The fuse shown in FIG. Next, the fuse 5 shown in Fig. 9A will be described. The fuse 5 has a sideways asterisk ("*") shape in a plan view. The fuse 5 has nine current paths P.

[0119] The first current path P is a path that passes through the left end L1, the branch point B, and the right end R1, and is V-shaped in plan view. The second current path P is a path that passes through the left end L1, the branch point B, and the right end R2. The third current path P is a path that passes through the left end L1, the branch point B, and the right end R3, and is a straight line that slopes downward to the right in plan view. The fourth current path P is a path that passes through the left end L2, the branch point B, and the right end R1. The fifth current path P is a path that passes through the left end L2, the branch point B, and the right end R2, and is a straight line that extends in the left-right direction in plan view. The sixth current path P is a path that passes through the left end L2, the branch point B, and the right end R3. The seventh current path P is a path that passes through the left end L3, the branch point B, and the right end R1, and is a straight line that slopes upward to the right in plan view. The eighth current path P is a path that passes through the left end L3, the branch point B, and the right end R2. The ninth current path P is a path that passes through the left end L3, the branch point B, and the right end R3, and forms an inverted V shape in plan view.

[0120] Here, the left end L1, the left end L2, and the left end L3 are located on the right side of the first small electrode 41 on the left side, in that order, from the rear to the front. The right end R1, the right end R2, and the right end R3 are located on the left side of the first small electrode 41 on the right side, in that order, from the rear to the front. The imaginary line passing through the left end L1 and the right end R1, the imaginary line passing through the left end L2 and the right end R2, and the imaginary line passing through the left end L3 and the right end R3 are parallel to the left-right direction. The branch point B is located at a position equidistant from the left end L1, L3, and the right end R1, R3. The branch point B is located at a position equidistant from the left end L2 and the right end R2 on the imaginary line passing through the left end L2 and the right end R2.

[0121] As described above, the nine current paths P share one branch point B.

[0122] <6> The fuse shown in FIG. Next, the fuse 5 shown in Fig. 9B will be described. The fuse 5 has nine current paths P.

[0123] The first current path P is a path that passes through the left end L1, the branch point B2, and the right end R1. The second current path P is a path that passes through the left end L1, the branch point B2, and the right end R2, and forms a straight line extending in the left-right direction in a plan view. The third current path P is a path that passes through the left end L1, the branch point B2, the branch point B1, and the right end R3, and forms a Z-shape in a plan view. The fourth current path P is a path that passes through the left end L2, the branch point B1, the branch point B2, and the right end R1. The fifth current path P is a path that passes through the left end L2, the branch point B1, the branch point B2, and the right end R2. The sixth current path P is a path that passes through the left end L2, the branch point B1, and the right end R3, and forms a straight line extending in the left-right direction in a plan view. The seventh current path P is a path that passes through the left end L3, the branch point B1, the branch point B2, and the right end R1, and forms a straight line that rises to the right in a plan view. The eighth current path P is a path that passes through the left end L3, the branch point B1, the branch point B2, and the right end R2. The ninth current path P is a path that passes through the left end L3, the branch point B1, and the right end R3.

[0124] Here, the left end L1, the left end L2, and the left end L3 are located on the right side of the first small electrode 41 on the left side in order from the rear to the front. The right end R1, the right end R2, and the right end R3 are located on the left side of the first small electrode 41 on the right side in order from the rear to the front. The imaginary line passing through the left end L1 and the right end R2 and the imaginary line passing through the left end L2 and the right end R3 are parallel to the left-right direction. The left end L3 is located forward of the imaginary line passing through the left end L2 and the right end R3. The right end R1 is located rearward of the imaginary line passing through the left end L1 and the right end R2. The branch point B1 is located at the position where the straight path passing through the left end L2 and the right end R3 and the straight path passing through the left end L3 and the right end R1 intersect. Branch point B2 is located at a position where a straight path passing through left end L1 and right end R2 intersects with a straight path passing through left end L3 and right end R1.

[0125] As described above, the nine current paths P share at least one branch point B (branch point B1 and / or branch point B2).

[0126] 3. Variations In the first to fourth embodiments, the small electrodes 4 are rectangular, but the shape of the small electrodes 4 is not particularly limited.

[0127] In the second and fourth embodiments, the first electrode 31 may not include the third fuse 53. Similarly, in the second and fourth embodiments, the second electrode 32 may not include the fourth fuse .

[0128] 4. Aspects As is apparent from the above-described embodiment and modified examples, the present disclosure includes the following aspects. In the following, reference symbols are given in parentheses only to clarify the correspondence with the embodiment.

[0129] The first aspect is a film capacitor (1) including a dielectric film (2) having a first surface (2a) and a second surface (2b) opposite to the first surface (2a), a first electrode (31) disposed on the first surface (2a), and a second electrode (32) disposed on the second surface (2b) and facing the first electrode (31) via the dielectric film (2). The first electrode (31) includes two adjacent small electrodes (4) and a fuse (5) connecting the two adjacent small electrodes (4). The fuse (5) has a plurality of current paths (P), and each of the plurality of current paths (P) connects the two adjacent small electrodes (4).

[0130] According to this aspect, it is possible to suppress a decrease in capacitance and reduce heat generation during energization.

[0131] The second aspect is a film capacitor (1) based on the first aspect. In the second aspect, the multiple current paths (P) share a branch point (B), and the multiple current paths (P) branch off at the branch point (B).

[0132] According to this embodiment, the fuse (5) is more likely to melt at the branch point (B) when a dielectric breakdown occurs.

[0133] A third aspect is a film capacitor (1) comprising a dielectric film (2) having a first surface (2a) and a second surface (2b) opposite to the first surface (2a), a first electrode (31) disposed on the first surface (2a), and a second electrode (32) disposed on the second surface (2b) and facing the first electrode (31) via the dielectric film (2). The first electrode (31) includes a first divided electrode (61) divided into a plurality of first small electrodes (41) arranged in a first direction (D1) and a second direction (D2) perpendicular to the first direction (D1), a first undivided electrode (71) arranged in the first direction (D1) with the first divided electrode (61), and a plurality of first fuses (51) connecting two first small electrodes (41) adjacent to each other in the first direction (D1) among the plurality of first small electrodes (41). Each of the plurality of first fuses (51) has a plurality of current paths (P), and each of the plurality of current paths (P) connects two first small electrodes (41) adjacent to each other in the first direction (D1).

[0134] According to this aspect, it is possible to suppress a decrease in capacitance and reduce heat generation during energization.

[0135] A fourth aspect is a film capacitor (1) based on the third aspect. In the fourth aspect, the multiple current paths (P) share a branch point (B), and the multiple current paths (P) branch off at the branch point (B).

[0136] According to this embodiment, the first fuse (51) is more likely to melt at the branch point (B) when a dielectric breakdown occurs.

[0137] A fifth aspect is a film capacitor (1) based on the third or fourth aspect. In the fifth aspect, the first electrode (31) further includes a plurality of first fuses (51) that connect adjacent first small electrodes (41) of the plurality of first small electrodes (41) in the first direction (D1) to the first non-divided electrode (71). Each of the plurality of first fuses (51) has a plurality of current paths (P), and each of the plurality of current paths (P) connects adjacent first small electrodes (41) in the first direction (D1) to the first non-divided electrode (71).

[0138] According to this aspect, it is possible to suppress a decrease in capacitance and reduce heat generation during energization.

[0139] A sixth aspect is a film capacitor (1) based on the fifth aspect. In the sixth aspect, the multiple current paths (P) share a branch point (B), and the multiple current paths (P) branch off at the branch point (B).

[0140] According to this embodiment, the first fuse (51) is more likely to melt at the branch point (B) when a dielectric breakdown occurs.

[0141] A seventh aspect is a film capacitor (1) based on any one of the third to sixth aspects. In the seventh aspect, the film capacitor (1) includes a second divided electrode (62) in which the second electrode (32) is divided into a plurality of second small electrodes (42) arranged in the first direction (D1) and the second direction (D2), a second undivided electrode (72) arranged in the first direction (D1) and the second divided electrode (62) and the first direction (D1) and not divided, and a plurality of second fuses (52) connecting two second small electrodes (42) adjacent to each other in the first direction (D1) among the plurality of second small electrodes (42). Each of the plurality of second fuses (52) has a plurality of current paths (P), and each of the plurality of current paths (P) connects two second small electrodes (42) adjacent to each other in the first direction (D1).

[0142] According to this aspect, it is possible to suppress a decrease in capacitance and reduce heat generation during energization.

[0143] An eighth aspect is a film capacitor (1) based on the seventh aspect. In the eighth aspect, the multiple current paths (P) share a branch point (B), and the multiple current paths (P) branch off at the branch point (B).

[0144] According to this embodiment, the second fuse (52) is more likely to melt at the branch point (B) when a dielectric breakdown occurs.

[0145] A ninth aspect is a film capacitor (1) based on any one of the third to eighth aspects. In the ninth aspect, the second electrode (32) further includes a plurality of second fuses (52) that connect the second small electrodes (42) adjacent to each other in the first direction (D1) among the plurality of second small electrodes (42) to the second non-divided electrode (72). Each of the plurality of second fuses (52) has a plurality of current paths (P), and each of the plurality of current paths (P) connects the second small electrodes (42) adjacent to each other in the first direction (D1) to the second non-divided electrode (72).

[0146] According to this aspect, it is possible to suppress a decrease in capacitance and reduce heat generation during energization.

[0147] A tenth aspect is a film capacitor (1) based on the ninth aspect. In the tenth aspect, the multiple current paths (P) share a branch point (B), and the multiple current paths (P) branch off at the branch point (B).

[0148] According to this embodiment, the second fuse (52) is more likely to melt at the branch point (B) when a dielectric breakdown occurs.

[0149] An eleventh aspect is a film capacitor (1) based on any one of the third to tenth aspects. In the eleventh aspect, the first electrode (31) further includes a plurality of third fuses (53) that connect two first small electrodes (41) adjacent to each other in the second direction (D2) among the plurality of first small electrodes (41). Each of the plurality of third fuses (53) has a plurality of current paths (P), and each of the plurality of current paths (P) connects two first small electrodes (41) adjacent to each other in the second direction (D2).

[0150] According to this embodiment, it is possible to suppress an excessive decrease in the capacitance of the film capacitor (1) upon dielectric breakdown.

[0151] A twelfth aspect is a film capacitor (1) based on any one of the seventh to eleventh aspects. In the twelfth aspect, the second electrode (32) further includes a plurality of fourth fuses (54) that connect two second small electrodes (42) adjacent to each other in the second direction (D2) among the plurality of second small electrodes (42). Each of the plurality of fourth fuses (54) has a plurality of current paths (P), and each of the plurality of current paths (P) connects two second small electrodes (42) adjacent to each other in the second direction (D2).

[0152] According to this embodiment, it is possible to suppress an excessive decrease in the capacitance of the film capacitor (1) upon dielectric breakdown.

[0153] A thirteenth aspect is a metallized film (10) comprising a dielectric film (2) and an electrode (3) disposed on the dielectric film (2). The electrode (3) includes two adjacent small electrodes (4) and a fuse (5) connecting the two adjacent small electrodes (4). The fuse (5) has a plurality of current paths (P), each of which connects two adjacent small electrodes (4).

[0154] According to this embodiment, it is possible to manufacture a film capacitor (1) capable of suppressing a decrease in capacitance.

[0155] A fourteenth aspect is a metallized film (10) based on the thirteenth aspect. In the fourteenth aspect, the multiple current paths (P) share a branch point (B), and the multiple current paths (P) branch off at the branch point (B).

[0156] According to this embodiment, when a dielectric breakdown occurs in the film capacitor (1) manufactured using the metallized film (10), the fuse (5) is more likely to melt at the branch point (B). [Explanation of symbols]

[0157] 1. Film capacitor 10 Metallized Film 2. Dielectric film 2a 1st page 2b 2nd side 3 electrodes 31 1st electrode 32 2nd electrode 4 small electrodes 41 1st small electrode 42 2nd small electrode 5. Fuse 51 First Fuse 52 Second Fuse 53 Third Fuse 54 4th Fuse 61 1st divided electrode 62 Second split electrode 71 1st undivided electrode 72 2nd undivided electrode P current path P1 current path P2 current path B Junction B1 Junction B2 Junction D1 1st direction D2 2nd direction

Claims

1. a dielectric film having a first surface and a second surface opposite to the first surface, a first electrode disposed on the first surface, and a second electrode disposed on the second surface and facing the first electrode with the dielectric film interposed therebetween; the first electrode includes two adjacent small electrodes and a fuse connecting the two adjacent small electrodes to each other; The fuse has a plurality of current paths, and each of the plurality of current paths connects two adjacent small electrodes. Film capacitor.

2. The plurality of current paths share a branch point, and the plurality of current paths branch at the branch point. The film capacitor according to claim 1 .

3. a dielectric film having a first surface and a second surface opposite to the first surface, a first electrode disposed on the first surface, and a second electrode disposed on the second surface and facing the first electrode with the dielectric film interposed therebetween; the first electrode includes a first divided electrode divided into a plurality of first small electrodes aligned in a first direction and a second direction perpendicular to the first direction, a first undivided electrode aligned in the first direction with the first divided electrode, and a plurality of first fuses connecting two first small electrodes adjacent to each other in the first direction among the plurality of first small electrodes, Each of the plurality of first fuses has a plurality of current paths, and each of the plurality of current paths connects two first small electrodes adjacent to each other in the first direction. Film capacitor.

4. The plurality of current paths share a branch point, and the plurality of current paths branch at the branch point. The film capacitor according to claim 3 .

5. the first electrode further includes a plurality of first fuses connecting adjacent first small electrodes of the plurality of first small electrodes in the first direction to the first non-divided electrode, Each of the plurality of first fuses has a plurality of current paths, and each of the plurality of current paths connects a first small electrode and the first non-split electrode adjacent to each other in the first direction. The film capacitor according to claim 4.

6. The plurality of current paths share a branch point, and the plurality of current paths branch at the branch point. The film capacitor according to claim 5 .

7. the second electrode includes a second divided electrode divided into a plurality of second small electrodes aligned in the first direction and the second direction, a second undivided electrode aligned in the first direction with the second divided electrode, and a plurality of second fuses connecting two second small electrodes adjacent to each other in the first direction among the plurality of second small electrodes, Each of the second fuses has a plurality of current paths, and each of the current paths connects two second small electrodes adjacent to each other in the first direction. The film capacitor according to claim 6.

8. The plurality of current paths share a branch point, and the plurality of current paths branch at the branch point. The film capacitor according to claim 7.

9. the second electrode further includes a plurality of second fuses connecting adjacent second small electrodes of the plurality of second small electrodes in the first direction to the second non-divided electrode, Each of the second fuses has a plurality of current paths, and each of the plurality of current paths connects a second small electrode and the second non-split electrode adjacent to each other in the first direction. The film capacitor according to claim 8.

10. The plurality of current paths share a branch point, and the plurality of current paths branch at the branch point. The film capacitor according to claim 9.

11. the first electrode further includes a plurality of third fuses connecting two first small electrodes adjacent to each other in the second direction among the plurality of first small electrodes, each of the third fuses has a plurality of current paths, and each of the plurality of current paths connects two first small electrodes adjacent to each other in the second direction; The film capacitor according to claim 10.

12. the second electrode further includes a plurality of fourth fuses connecting two second small electrodes adjacent to each other in the second direction among the plurality of second small electrodes, each of the plurality of fourth fuses has a plurality of current paths, and each of the plurality of current paths connects two second small electrodes adjacent to each other in the second direction; The film capacitor according to claim 11.

13. A dielectric film and an electrode disposed on the dielectric film, the electrodes include two adjacent small electrodes and a fuse connecting the two adjacent small electrodes to each other; The fuse has a plurality of current paths, and each of the plurality of current paths connects two adjacent small electrodes. Metallized film.

14. The plurality of current paths share a branch point, and the plurality of current paths branch at the branch point.

14. The metallized film of claim 13.

Images