Film capacitor

Abstract

A film capacitor (1) comprises: a dielectric film (2) having a first surface (201) and a second surface (202) opposite to the first surface (201); a first electrode (31) disposed on the first surface (201); and a second electrode (32) disposed on the second surface (202) and opposed to the first electrode (31) with the dielectric film (2) therebetween. At least one of the first electrode (31) and the second electrode (32) includes a plurality of regions (4) and fuses (5) each connecting two adjacent regions (4) of the plurality of regions (4). At least one of the two adjacent regions (4) has a depression (6) depressed in a direction in which the fuse (5) extends, and the inside of the depression (6) is connected to the fuse (5).

Description

Technical Field

[0001] The present disclosure generally relates to film capacitors, and more particularly to film capacitors having fuses.

Background Art

[0002] Patent Document 1 discloses a metallized film capacitor. This metallized film capacitor includes a pair of vapor-deposited electrodes having insulating margins at different positions from each other and at least two dielectric films, and has metallicon on both end faces. The vapor-deposited electrodes are formed into split electrodes on the side closer to the insulating margin and are connected by fuses.

[0003] However, the metallized film capacitor of Patent Document 1 has a problem that it is difficult to increase the sensitivity of the fuse.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] An object of the present disclosure is to provide a film capacitor capable of increasing the sensitivity of a fuse.

[0006] A film capacitor according to an aspect 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 through the dielectric film. At least one of the first electrode and the second electrode includes a plurality of regions and a fuse connecting two adjacent regions among the plurality of regions. At least one of the two adjacent regions has a recess recessed in a direction in which the fuse extends, and is connected to the fuse inside the recess. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is an explanatory diagram showing a film capacitor according to the first embodiment. [Figure 2] Figure 2A is a schematic plan view of the first metallized film in the film capacitor described above. Figure 2B is a schematic plan view of the second metallized film in the film capacitor described above. [Figure 3] Figure 3A is a magnified view of the main part of the same film capacitor (part X in Figure 1). Figure 3B is a magnified view of the main part of a modified version of the same film capacitor (corresponding to part X in Figure 1). Figure 3C is a diagram for comparison with Figures 3A and 3B. [Figure 4] Figure 4 is an enlarged view of the main part of the film capacitor according to the first embodiment (part Y in Figure 1). [Figure 5] Figure 5 is a schematic cross-sectional view of the ZZ line in Figure 1. [Figure 6] Figure 6A is a schematic perspective view showing an example of a film capacitor. Figure 6B is a schematic perspective view showing the manufacturing process of a film capacitor. [Figure 7] Figure 7A is an enlarged view of the main part of the film capacitor according to the second embodiment (corresponding to part X in Figure 1). Figure 7B is an enlarged view of the main part of the same film capacitor (corresponding to part Y in Figure 1). [Figure 8] Figure 8A is an enlarged view of the main part of the film capacitor according to the third embodiment (corresponding to part P1 in Figure 2A). Figure 8B is an enlarged view of the main part of the same film capacitor (corresponding to part P2 in Figure 2B). [Figure 9] Figure 9 is an explanatory diagram showing a film capacitor according to the fourth embodiment. [Figure 10] Figure 10A is a schematic plan view of the first metallized film in the film capacitor described above. Figure 10B is a schematic plan view of the second metallized film in the film capacitor described above. [Figure 11]Figure 11A is an enlarged view of the main part of the film capacitor according to the fifth embodiment (corresponding to part Q1 in Figure 10A). Figure 11B is an enlarged view of the main part of the same film capacitor (corresponding to part Q2 in Figure 10B). [Modes for carrying out the invention]

[0008] 1. Overview Figure 6A shows an example of a film capacitor 1. The film capacitor 1 is, for example, in the shape of a flattened cylinder.

[0009] Film capacitor 1 is manufactured, for example, as shown in Figure 6B. First, a cylindrical body 100 is formed by overlapping and winding two elongated metallized films 200 (first metallized film 210 and second metallized film 220).

[0010] Here, the first metallized film 210 comprises a dielectric film 2 (first dielectric film 21) and a first electrode 31. The first electrode 31 is arranged on one side of the first dielectric film 21. Although the first electrode 31 is shown in a simplified manner in Figure 6B, in detail, as shown in Figure 2A, the first electrode 31 includes a plurality of regions 4 and a fuse 5. The regions 4 are not particularly limited, but examples include a first small electrode 71 and a first non-divided electrode 81. The fuse 5 connects two adjacent regions 4 among the plurality of regions 4. Specifically, as shown in Figure 2A, the fuse 5 connects the first small electrodes 71 together. The fuse 5 also connects the first small electrode 71 and the first non-divided electrode 81.

[0011] On the other hand, the second metallized film 220 comprises a dielectric film 2 (second dielectric film 22) and a second electrode 32. The second electrode 32 is positioned on one side of the second dielectric film 22. Although the second electrode 32 is simplified in Figure 6B, similar to the first electrode 31, in detail the second electrode 32 includes multiple regions 4 and a fuse 5, as shown in Figure 2B. The regions 4 are not particularly limited, but examples include a second small electrode 72 and a second non-divided electrode 82. The fuse 5 connects two adjacent regions 4 among the multiple regions 4. Specifically, as shown in Figure 2B, the fuse 5 connects the second small electrodes 72 together. The fuse 5 also connects the second small electrode 72 and the second non-divided electrode 82. In the following, the first small electrode 71 and the second small electrode 72 may be collectively referred to as "small electrode 7". Furthermore, the first non-divided electrode 81 and the second non-divided electrode 82 are sometimes collectively referred to as "non-divided electrode 8".

[0012] Next, the sides of the cylindrical body 100 shown in Figure 6B are pressed to flatten it, resulting in a flattened cylindrical body 110 (see Figure 6A). Subsequently, metal is sprayed onto both bottom surfaces (end faces) of the flattened cylindrical body 110 to form end face electrodes 30 (first end face electrode 310 and second end face electrode 320), thereby obtaining a film capacitor 1.

[0013] The film capacitor 1 may contain multiple unit capacitors 10 in the short-side direction S (synonymous with the width direction and one direction) of the dielectric film 2 (see Figure 5). Note that Figure 5 is not a precise cross-sectional view of Figure 6A, but is a schematic illustration to facilitate understanding of the following explanation.

[0014] Hereafter, one side of the short-side direction S may be referred to as the "left side" and the other side as the "right side". The film capacitor 1 shown in Figure 5 includes four unit capacitors 10 connected in parallel in the short-side direction S of the dielectric film 2. The first unit capacitor 10a is formed in the portion where the first non-divided electrode 81 and the left-side second small electrode 72 face each other via the first dielectric film 21. The second unit capacitor 10b is formed in the portion where the first non-divided electrode 81 and the right-side second small electrode 72 face each other via the first dielectric film 21. The third unit capacitor 10c is formed in the portion where the left-side first small electrode 71 and the second non-divided electrode 82 face each other via the first dielectric film 21. The fourth unit capacitor 10d is formed in the portion where the right-side first small electrode 71 and the second non-divided electrode 82 face each other via the first dielectric film 21. Furthermore, each of these four unit capacitors 10 is arranged in multiples along the longitudinal direction L of the dielectric film 2 (the direction perpendicular to the plane of the paper in Figure 5).

[0015] In this way, in the film capacitor 1, the first electrode 31 and the second electrode 32 face each other via the dielectric film 2. End electrodes 30 (first end electrode 310 and second end electrode 320) are present at both ends of the film capacitor 1. The first end electrode 310 is located on one side (left side in Figure 5) in the short direction S of the dielectric film 2. The first electrode 31 is connected to the first end electrode 310. On the other hand, the second end electrode 320 is located on the other side (right side in Figure 5) in the short direction S of the dielectric film 2. The second electrode 32 is connected to the second end electrode 320. By applying a voltage between the first end electrode 310 and the second end electrode 320, the film capacitor 1 (each unit capacitor 10) can be charged.

[0016] Here, the fuse 5 is a part that melts when an excessive current flows and cuts off the circuit. That is, when an excessive current flows through the dielectric film 2 due to dielectric breakdown, the fuse 5 is cut off, thereby protecting the film capacitor 1. And the lower the sensitivity of the fuse 5, the less likely the fuse 5 is to be cut off even when an excessive current flows, so there is a risk of a decrease in the reliability of the film capacitor 1. On the other hand, the higher the sensitivity of the fuse 5, the easier it is for the fuse 5 to be cut off when an excessive current flows, so the reliability of the film capacitor 1 can be enhanced.

[0017] The inventors of the present invention improved the fuse 5 shown in FIG. 3C and developed the fuse 5 as shown in FIGS. 3A and 3B. To increase the sensitivity of the fuse 5, it is conceivable to increase the electrical resistance of the fuse 5. To increase the electrical resistance of the fuse 5, for example, the width W5 of the fuse 5 may be narrowed or the length L5 of the fuse 5 may be lengthened. However, in FIG. 3C, there are limitations in the manufacturing method for narrowing the width W5 of the fuse 5. On the other hand, in FIG. 3C, when the length L5 of the fuse 5 is lengthened, the distance (slit width W2) between two adjacent regions 4 also becomes longer. The larger the slit width W2, the smaller the area of the region 4. As a result, the electrode area of the film capacitor 1 (the area where the first electrode 31 and the second electrode 32 face each other) becomes smaller, so the capacitance (capacitance) of the film capacitor 1 decreases.

[0018] In contrast, in FIGS. 3A and 3B, there is no need to widen the slit width W2, and by lengthening the length L5 of the fuse 5, the electrical resistance of the fuse 5 is increased. That is, at least one of two adjacent regions 4 has a recess 6 that is recessed in the extending direction E of the fuse 5, and is connected to the fuse 5 inside the recess 6. In this way, compared with the distance (slit width W2) between two adjacent regions 4, the length of the fuse 5 can be increased by a length corresponding to the depth L6 (recess amount L6) of the recess 6. Thereby, the electrical resistance of the fuse 5 can be increased. Therefore, the sensitivity of the fuse 5 can be enhanced.

[0019] 2. Details (1) First Embodiment Hereinafter, the film capacitor 1 according to the first embodiment will be described with reference to FIGS. 1 to 6B. Note that the dimensional ratios between the respective components in the figures do not necessarily reflect the actual dimensional ratios. The same applies to embodiments other than the first embodiment.

[0020] FIG. 1 is an explanatory diagram showing the film capacitor 1 according to the present embodiment. Specifically, for the sake of easy understanding of the following description, FIG. 1 shows two metallized films 200 that are not wound but are shifted and overlapped in the longitudinal direction L.

[0021] The film capacitor 1 according to the present embodiment includes a dielectric film 2, a first electrode 31, and a second electrode 32. The second electrode 32 faces the first electrode 31 through the dielectric film 2 (the first dielectric film 21 in the present embodiment). The film capacitor 1 includes a plurality (four in the present embodiment) of unit capacitors 10 connected in parallel in the short-side direction S (see FIG. 5). Hereinafter, the dielectric film 2, the first electrode 31, and the second electrode 32 will be described.

[0022] <Dielectric Film> The dielectric film 2 is a film made of a dielectric. The dielectric is not particularly limited, and examples thereof include polypropylene (PP) and polyethylene terephthalate (PET).

[0023] The dielectric film 2 has an elongated film shape. That is, the dielectric film 2 is a film that extends in the longitudinal direction L perpendicular to the short-side direction S.

[0024] The dielectric film 2 has a first surface 201 and a second surface 202 (see Figure 5). The first surface 201 is the surface facing one side in the thickness direction T of the dielectric film 2. The second surface 202 is the surface opposite to the first surface 201. That is, the second surface 202 is the surface facing the other side in the thickness direction T of the dielectric film 2. The thickness direction T is the direction perpendicular to the short side S and the long side L, in other words, the direction connecting the first surface 201 and the second surface 202.

[0025] In this embodiment, the dielectric film 2 includes a first dielectric film 21 and a second dielectric film 22.

[0026] <1st electrode> The first electrode 31 may be a vapor-deposited electrode, a metal foil electrode, or a plated electrode. The material of the first electrode 31 is not particularly limited, but examples include aluminum.

[0027] The first electrode 31 is positioned on the first surface 201 of the dielectric film 2 (first dielectric film 21 in this embodiment). This forms the metallized film 200 (first metallized film 210 in this embodiment) (see Figure 2A).

[0028] In this embodiment, the first electrode 31 includes a plurality of regions 4 and a fuse 5. The fuse 5 connects two adjacent regions 4 among the plurality of regions 4.

[0029] In the following, the region 4 included in the first electrode 31 may be referred to as the "first region 41." Also, the fuse 5 included in the first electrode 31 may be referred to as the "first fuse 51."

[0030] ≪First area≫ As shown in Figure 2A, the first electrode 31 is divided into a first non-divided electrode 81 and a first divided electrode 91 by a first partition slit 21b. Furthermore, the first divided electrode 91 is divided into a plurality of first small electrodes 71 by a first longitudinal slit 21c and a first short slit 21d.

[0031] Here, each of the first non-divided electrode 81 and the first small electrode 71 corresponds to one first region 41. On the other hand, the first divided electrode 91 contains multiple first small electrodes 71, and therefore contains multiple first regions 41. Consequently, the first divided electrode 91 does not correspond to one first region 41.

[0032] The first partition slit portion 21b is the portion on the first surface 201 of the first dielectric film 21 where the first electrode 31 is not located. Therefore, the dielectric film 2 is exposed in this portion. The first partition slit portion 21b extends in the longitudinal direction L with a constant width, except for the portion where the first fuse 51 is located.

[0033] The first non-divided electrode 81 is a solid electrode extending in the longitudinal direction L. That is, the first non-divided electrode 81 is positioned over the entire area between the first partition slit portion 21b and one end (left side) in the short direction S of the dielectric film 2. The left end of the first non-divided electrode 81 is connected to the first end face electrode 310.

[0034] On the other hand, the first divided electrode 91 is positioned between the first partition slit portion 21b and the first end margin portion 21a.

[0035] Here, the first end margin portion 21a is located at the other end (right side) of the short-side direction S of the dielectric film 2. The first end margin portion 21a, like the first partition slit portion 21b, is a portion where the first electrode 31 is not located. Therefore, the dielectric film 2 is also exposed in this portion. The first end margin portion 21a extends in the longitudinal direction L with a constant width. The presence of the first end margin portion 21a allows the first divided electrode 91 and the second end face electrode 320 to be separated. In this embodiment, the width of the first end margin portion 21a is the same as the width of the first partition slit portion 21b, but it may differ to the extent that it does not impair the effects of this embodiment.

[0036] Furthermore, as described above, the first divided electrode 91 is divided into a plurality of first small electrodes 71 by the first longitudinal slit portion 21c and the first transverse slit portion 21d.

[0037] Here, the first longitudinal slit portion 21c, like the first partition slit portion 21b, is a portion of the first surface 201 of the first dielectric film 21 where the first electrode 31 is not located. Therefore, the dielectric film 2 is also exposed in this portion. The first longitudinal slit portion 21c also extends in the longitudinal direction L with a constant width, except for the location where the first fuse 51 is present. In this embodiment, the width of the first longitudinal slit portion 21c is the same as the width of the first partition slit portion 21b, but it may differ to the extent that it does not impair the effects of this embodiment.

[0038] On the other hand, the first short-direction slit portion 21d, like the first partition slit portion 21b, is a portion of the first surface 201 of the first dielectric film 21 where the first electrode 31 is not located. Therefore, the dielectric film 2 is also exposed in this portion. However, the first short-direction slit portion 21d extends in the short-direction S with a constant width. The first short-direction slit portion 21d intersects with the first longitudinal slit portion 21c and is connected to the first partition slit portion 21b and the first end margin portion 21a. In this embodiment, the width of the first short-direction slit portion 21d is the same as the width of the first partition slit portion 21b, but it may be different within a range that does not impair the effects of this embodiment.

[0039] The multiple first small electrodes 71 are arranged in multiple rows (two rows in this embodiment) along the longitudinal direction L. Each of the multiple first small electrodes 71 in the left row is adjacent to each of the multiple first small electrodes 71 in the right row along the short direction S. Furthermore, each of the multiple first small electrodes 71 in the left row is adjacent to the first undivided electrode 81 along the short direction S. Thus, the first undivided electrode 81 is larger than the first small electrodes 71.

[0040] Viewed from the thickness direction T of the dielectric film 2, the first small electrode 71 has a polygonal shape (rectangular in this embodiment) with three or more sides. In this embodiment, the multiple first small electrodes 71 are the same size, but they may be different in size as long as it does not impair the effects of this embodiment.

[0041] ≪First Fuse≫ The first fuse 51 is the part that melts when an excessive current flows through it, interrupting the circuit. The first fuse 51 is an elongated wire extending in the shorter direction S. Thus, in this embodiment, the direction E in which the first fuse 51 extends is parallel to the shorter direction S.

[0042] As described above, the first fuse 51 connects two adjacent first regions 41 from among the plurality of first regions 41. In this embodiment, at least one of the two adjacent first regions 41 has a recessed portion 6. The recessed portion 6 is recessed in the direction E (short direction S in this embodiment) in which the first fuse 51 extends. In this embodiment, when viewed from the thickness direction T of the dielectric film 2, the recessed portion 6 is rectangular in shape. The recessed portion 6 is connected to the first partition slit portion 21b and the first longitudinal slit portion 21c. The dielectric film 2 is exposed in the recessed portion 6, except where the first fuse 51 is located. In the following, the recessed portion 6 of the first region 41 may be referred to as the "first recessed portion 61".

[0043] The recessed portion 6 has a width W6 and a depth L6 (see Figures 3A and 3B). The width W6 of the recessed portion 6 is the length L in the longitudinal direction of the recessed portion 6. The width W6 of the recessed portion 6 is wider than the width W5 of the first fuse 51. However, from the viewpoint of increasing the electrode area of ​​the film capacitor 1, it is preferable that the width W6 of the recessed portion 6 be as narrow as possible. On the other hand, the depth L6 of the recessed portion 6 is the length of the recessed portion 6 in the direction E (short direction S in this embodiment) in which the first fuse 51 extends.

[0044] Furthermore, at least one of the two adjacent first regions 41 is connected to the first fuse 51 inside the recess 6. That is, both of the two adjacent first regions 41 may be connected to the first fuse 51 inside the recess 6 (see Figure 3A), or only one of the two adjacent first regions 41 may be connected to the first fuse 51 inside the recess 6 (see Figure 3B).

[0045] To illustrate with a specific example, in Figure 3A, the first fuse 51 connects two adjacent first small electrodes 71 in the short-side direction S. Each of these two first small electrodes 71 has a recessed portion 6. The recessed portion 6 is recessed in the direction E (short-side direction S in this embodiment) in which the first fuse 51 extends.

[0046] Furthermore, the recessed portion 6 exists on at least one of the three or more sides of the first small electrode 71. That is, in the left first small electrode 71, recessed portions 6 exist on both the left and right sides. The recessed portion 6 on the left side is used to connect to the region 4 (not shown in Figure 3A) located further to the left via the first fuse 51. The recessed portion 6 on the right side is used to connect to the right first small electrode 71 via the first fuse 51. On the other hand, in the right first small electrode 71, recessed portions 6 exist only on the left side. Each of the two first small electrodes 71 is connected to the first fuse 51 inside the recessed portion 6.

[0047] In Figure 3B, similar to Figure 3A, the first fuse 51 connects two adjacent first small electrodes 71 in the short-side direction S. However, focusing on the two first small electrodes 71, only the right-hand first small electrode 71 has a recess 6, while the left-hand first small electrode 71 does not. The left-hand first small electrode 71 has a recess 6 used to connect to a region 4 (not shown in Figure 3B) located further to the left via the first fuse 51. The recess 6 is recessed in the direction E (short-side direction S in this embodiment) in which the first fuse 51 extends. Focusing on the two first small electrodes 71, only the right-hand first small electrode 71 is connected to the first fuse 51 inside the recess 6.

[0048] Furthermore, the recessed portion 6 is present on at least one of the three or more sides of the first small electrode 71. That is, in each of the two first small electrodes 71, the recessed portion 6 is present only on the left side.

[0049] In Figure 4, the first fuse 51 connects adjacent first non-divided electrodes 81 and a plurality of first small electrodes 71 in the short-side direction S. Each of the first non-divided electrodes 81 and the plurality of first small electrodes 71 has a recess 6. The recess 6 is recessed in the direction E (short-side direction S in this embodiment) in which the first fuse 51 extends. Each of the first non-divided electrodes 81 and the plurality of first small electrodes 71 is connected to the first fuse 51 inside the recess 6.

[0050] Here, from the viewpoint of improving the sensitivity of the first fuse 51, it is preferable that the width W5 of the first fuse 51 be narrower and the length L51 of the first fuse 51 be longer. Unless otherwise specified, in this specification, the length L5 of the fuse 5 includes the length L51 of the first fuse 51. The length L5 of the fuse 5 is the length in the direction E in which the fuse 5 extends.

[0051] Furthermore, from the viewpoint of suppressing a decrease in the capacitance of the film capacitor 1, it is preferable that the distance between two adjacent first regions 41 (slit width W2) be as short as possible.

[0052] <Second electrode> The second electrode 32, like the first electrode 31, may be a vapor-deposited electrode, a metal foil electrode, or a plated electrode. The material of the second electrode 32 is the same as the material of the first electrode 31.

[0053] The second electrode 32 is positioned on the second surface 202 of the dielectric film 2 (the first dielectric film 21 in this embodiment). In other words, in this embodiment, the second electrode 32 is positioned on the first surface 201 of the second dielectric film 22. This forms the metallized film 200 (the second metallized film 220 in this embodiment) (see Figure 2B).

[0054] In this embodiment, the second electrode 32 includes a plurality of regions 4 and a fuse 5. The fuse 5 connects two adjacent regions 4 among the plurality of regions 4.

[0055] In the following, the region 4 included in the second electrode 32 may be referred to as the "second region 42." Also, the fuse 5 included in the second electrode 32 may be referred to as the "second fuse 52."

[0056] ≪Second area≫ As shown in Figure 2B, the second electrode 32 is divided into a second non-divided electrode 82 and a second divided electrode 92 by a second partition slit 22b. Furthermore, the second divided electrode 92 is divided into a plurality of second small electrodes 72 by a second longitudinal slit 22c and a second short slit 22d. In the following, the first divided electrode 91 and the second divided electrode 92 may be collectively referred to as "divided electrode 9".

[0057] Here, each of the second non-divided electrode 82 and the second small electrode 72 corresponds to one second region 42. On the other hand, the second divided electrode 92 contains multiple second small electrodes 72, and therefore contains multiple second regions 42. Consequently, the second divided electrode 92 does not correspond to one second region 42.

[0058] The second partition slit portion 22b is the portion on the first surface 201 of the second dielectric film 22 (the second surface 202 of the first dielectric film 21) where the second electrode 32 is not located. Therefore, the dielectric film 2 is exposed in this portion. The second partition slit portion 22b extends in the longitudinal direction L with a constant width, except where the second fuse 52 is located. In this embodiment, the width of the second partition slit portion 22b is the same as the width of the first partition slit portion 21b, but it may differ to the extent that it does not impair the effects of this embodiment.

[0059] The second non-divided electrode 82 is a solid electrode extending in the longitudinal direction L. That is, the second non-divided electrode 82 is positioned across the entire area between the second partition slit portion 22b and the other end (right side) in the short direction S of the dielectric film 2. The right end of the second non-divided electrode 82 is connected to the second end face electrode 320.

[0060] On the other hand, the second divided electrode 92 is positioned between the second partition slit portion 22b and the second end margin portion 22a.

[0061] Here, the second end margin portion 22a is located at one end (left side) in the short direction S of the dielectric film 2. The second end margin portion 22a, like the second partition slit portion 22b, is a portion where the second electrode 32 is not located. Therefore, the dielectric film 2 is also exposed in this portion. The second end margin portion 22a extends in the longitudinal direction L with a constant width. The presence of the second end margin portion 22a allows the second divided electrode 92 and the first end face electrode 310 to be separated. In this embodiment, the width of the second end margin portion 22a is the same as the width of the second partition slit portion 22b, but it may differ within a range that does not impair the effects of this embodiment.

[0062] Furthermore, as described above, the second divided electrode 92 is divided into a plurality of second small electrodes 72 by the second longitudinal slit portion 22c and the second short slit portion 22d.

[0063] Here, the second longitudinal slit portion 22c, like the second partition slit portion 22b, is a portion of the first surface 201 of the second dielectric film 22 (the second surface 202 of the first dielectric film 21) where the second electrode 32 is not located. Therefore, the dielectric film 2 is also exposed in this portion. The second longitudinal slit portion 22c also extends in the longitudinal direction L with a constant width, except for the location where the second fuse 52 is present. In this embodiment, the width of the second longitudinal slit portion 22c is the same as the width of the second partition slit portion 22b, but it may differ to the extent that it does not impair the effects of this embodiment.

[0064] On the other hand, the second short-direction slit portion 22d, like the second partition slit portion 22b, is a portion of the first surface 201 of the second dielectric film 22 (the second surface 202 of the first dielectric film 21) where the second electrode 32 is not located. Therefore, the dielectric film 2 is also exposed in this portion. However, the second short-direction slit portion 22d extends in the short direction S with a constant width. The second short-direction slit portion 22d intersects with the second longitudinal slit portion 22c and is connected to the second partition slit portion 22b and the second end margin portion 22a. In this embodiment, the width of the second short-direction slit portion 22d is the same as the width of the second partition slit portion 22b, but it may be different within a range that does not impair the effects of this embodiment.

[0065] Multiple second small electrodes 72 are arranged in multiple rows (two rows in this embodiment) along the longitudinal direction L. Each of the multiple second small electrodes 72 in the right-hand row is adjacent to each of the multiple second small electrodes 72 in the left-hand row along the short-side direction S. Furthermore, each of the multiple second small electrodes 72 in the right-hand row is adjacent to the second undivided electrode 82 along the short-side direction S. Thus, the second undivided electrode 82 is larger than the second small electrodes 72.

[0066] Viewed from the thickness direction T of the dielectric film 2, the second small electrode 72 has a polygonal shape (rectangular in this embodiment) with three or more sides. In this embodiment, the multiple second small electrodes 72 are the same size, but they may differ within a range that does not impair the effects of this embodiment. Furthermore, in this embodiment, the size of the second small electrode 72 is the same as the size of the first small electrode 71, but they may differ within a range that does not impair the effects of this embodiment.

[0067] ≪Second Fuse≫ The second fuse 52 is basically the same as the first fuse 51. That is, in Figure 2B, the second fuse 52 connects two adjacent second small electrodes 72 in the short-side direction S. Each of these two second small electrodes 72 has a recess 6. The recess 6 is recessed in the direction E (short-side direction S in this embodiment) in which the second fuse 52 extends. Each of the two second small electrodes 72 is connected to the second fuse 52 inside the recess 6. In the following, the recess 6 of the second region 42 may be referred to as the "second recess 62".

[0068] In Figure 2B, the second fuse 52 connects a second non-divided electrode 82 adjacent to a plurality of second small electrodes 72 in the short-side direction S. Each of the second non-divided electrode 82 and the plurality of second small electrodes 72 has a recessed portion 6. The recessed portion 6 is recessed in the direction E (short-side direction S in this embodiment) in which the second fuse 52 extends. Each of the second non-divided electrode 82 and the plurality of second small electrodes 72 is connected to the second fuse 52 inside the recessed portion 6.

[0069] The second electrode 32 described above faces the first electrode 31 via the dielectric film 2 (first dielectric film 21 in this embodiment) (see Figure 5). The film capacitor 1 may include a plurality (four in this embodiment) of unit capacitors 10 in the short-side direction S of the dielectric film 2.

[0070] Specifically, the second small electrode 72 on the left side of the second electrode 32 faces the first non-divided electrode 81 of the first electrode 31 via the dielectric film 2. The first unit capacitor 10a is formed in this area.

[0071] Furthermore, the second small electrode 72 on the right side of the second electrode 32 faces the first non-divided electrode 81 of the first electrode 31 via the dielectric film 2. A second unit capacitor 10b is formed in this area.

[0072] Furthermore, the second non-divided electrode 82 of the second electrode 32 faces the first small electrode 71 on the left side of the first electrode 31 via the dielectric film 2. A third unit capacitor 10c is formed in this area.

[0073] Furthermore, the second non-divided electrode 82 of the second electrode 32 faces the first small electrode 71 on the right side of the first electrode 31 via the dielectric film 2. A fourth unit capacitor 10d is formed in this area.

[0074] These four unit capacitors 10 are connected in parallel along the short side S of the dielectric film 2. Furthermore, each of these four unit capacitors 10 is arranged in multiples along the long side L of the dielectric film 2.

[0075] <Effects and Effects> According to this embodiment, the sensitivity of the fuse 5 can be increased for the following reasons.

[0076] As mentioned above, one way to increase the sensitivity of fuse 5 is to increase its electrical resistance. To do this, one can either narrow the width W5 of fuse 5 or length L5 of fuse 5.

[0077] However, in Figure 3C, there are limitations in the manufacturing process to narrowing the width W5 of the fuse 5. For example, when forming the first electrode 31 and the second electrode 32 by vapor deposition, the oil mask method is sometimes used. The oil mask method is a method of masking areas where the first electrode 31 and the second electrode 32 are not to be formed by applying oil. However, this oil mask method has limitations in narrowing the width W5 of the fuse 5.

[0078] On the other hand, in Figure 3C, increasing the length L5 of the fuse 5 also increases the distance between two adjacent regions 4 (slit width W2). The wider the slit width W2, the smaller the area of ​​region 4 becomes. Specifically, the area of ​​at least one of the small electrode 7 and the non-divided electrode 8 decreases. As a result, the electrode area of ​​the film capacitor 1 (the area where the first electrode 31 and the second electrode 32 face each other) becomes smaller, and the capacitance of the film capacitor 1 decreases.

[0079] In contrast, in Figures 3A and 3B, there is no need to widen the slit width W2; the electrical resistance of the fuse 5 is increased by lengthening the fuse 5 length L5. That is, at least one of the two adjacent regions 4 has a recessed portion 6 that is recessed in the direction E in which the fuse 5 extends, and the fuse 5 is connected to the inside of the recessed portion 6. In this way, the length L5 of the fuse 5 can be increased by a length corresponding to the depth L6 of the recessed portion 6, compared to the distance between the two adjacent regions 4 (slit width W2). This makes it possible to increase the electrical resistance of the fuse 5.

[0080] Therefore, according to this embodiment, the sensitivity of the fuse 5 can be increased.

[0081] Unless otherwise specified, the length L5 of the fuse 5 in this specification includes the length L52 of the second fuse 52. Also, unless otherwise specified, the depth L6 of the recess 6 in this specification includes both the depth L61 of the first recess 61 and the depth L62 of the second recess 62.

[0082] (2) Second Embodiment Next, the film capacitor 1 according to the second embodiment will be described with reference to Figures 7A and 7B. In the second embodiment, components similar to those in the first embodiment may be given the same reference numerals as in the first embodiment, and detailed descriptions may be omitted.

[0083] In this embodiment, as shown in FIGS. 7A and 7B, the extending direction E of the fuse 5 is inclined with respect to the direction (the short side direction S) in which two adjacent regions 4 are arranged. If the angle formed between the extending direction E of the fuse 5 and the short side direction S is θ (the inclination angle θ), then 0° < θ < 90° and 0 < cosθ < 1. From the perspective of improving the sensitivity of the fuse 5, the closer θ is to 90° and the closer cosθ is to 0, the more preferable it is. Thereby, the length L5 of the fuse 5 can be made longer.

[0084] <Effect> According to this embodiment, the sensitivity of the fuse 5 can be further enhanced for the following reasons.

[0085] As shown in FIGS. 7A and 7B, also in this embodiment, there is no need to widen the slit width W2, and by increasing the length L5 of the fuse 5, the electrical resistance of the fuse 5 is increased. That is, at least one of two adjacent regions 4 has a recess 6 that is recessed in the extending direction E of the fuse 5, and the fuse 5 is connected inside the recess 6. Further, in this embodiment, the extending direction E of the fuse 5 is inclined by an inclination angle θ with respect to the direction (the short side direction S in this embodiment) in which two adjacent regions 4 are arranged. Since it is inclined in this way, even if the recess 6 does not exist, the length (W2 / cosθ) of the inclined fuse 5 is longer than the length (the slit width W2) of the non-inclined fuse 5. In this embodiment, since the recess 6 exists and the fuse 5 is connected inside the recess 6, the length L5 of the inclined fuse 5 is clearly longer than the above W2 / cosθ. Thereby, the electrical resistance of the fuse 5 can be further increased.

[0086] Therefore, according to this embodiment, the sensitivity of the fuse 5 can be further enhanced.

[0087] (3) Third Embodiment Next, the film capacitor 1 according to the third embodiment will be described with reference to Figures 8A and 8B. In the third embodiment, components similar to those in the first and second embodiments may be denoted by the same reference numerals as in the first and second embodiments, and detailed descriptions may be omitted.

[0088] This embodiment differs from the first embodiment in that the length L5 of the fuse 5 increases as it moves away from the end electrode 30 in the short-side direction S of the dielectric film 2 (see Figures 8A and 8B).

[0089] <1st electrode> As shown in Figure 8A, the first electrode 31 includes three or more first regions 41 and a first fuse 51.

[0090] ≪First area≫ Three or more (three in this embodiment) first regions 41 are arranged in the short-side direction S of the dielectric film 2. The three first regions 41 are one first non-divided electrode 81 and two first small electrodes 71. That is, in this embodiment, one first non-divided electrode 81 and two first small electrodes 71 are arranged in the short-side direction S of the dielectric film 2.

[0091] ≪First Fuse≫ The first fuse 51 connects two adjacent first regions 41 out of three or more (three in this embodiment) first regions 41. In this embodiment, two first fuses 51 exist along the short-side direction S of the dielectric film 2. The three first regions 41 are connected by the two first fuses 51. That is, the first first fuse 51 connects the first non-divided electrode 81 and the first small electrode 71 (the left first small electrode 71) adjacent in the short-side direction S. The second first fuse 51 connects the first small electrodes 71 adjacent in the short-side direction S (the left first small electrode 71 and the right first small electrode 71). In the short-side direction S, the position of the second first fuse 51 is further from the first end face electrode 310 than the position of the first first fuse 51.

[0092] The length L51 of the first fuse 51 becomes longer as it moves away from the first end face electrode 310 in the short side direction S. That is, in the present embodiment, the length L51 (particularly, L512) of the second first fuse 51 is longer than the length L51 (particularly, L511) of the first first fuse 51 (L512 > L511).

[0093] Here, the length L51 of the first fuse 51 can be adjusted by the depth L61 of the first recess 61. FIG. 8A shows an example in which the first recesses 61 are present on both the left and right sides of the first fuse 51. In FIG. 8A, if the depths L61 of the first recesses 61 are L611, L612, L613, and L614 in order from the left side, and the slit width W2 is constant, the first recess 61 can be formed such that (L613 + L614) > (L611 + L612), so that the length L512 of the second first fuse 51 can be made longer than the length L511 of the first first fuse 51 (L512 > L511). Note that the depth L61 of the first recess 61 may be increased as it moves away from the first end face electrode 310 in the short side direction S (L611 < L612 < L613 < L614). Also in this case, the length L51 of the first fuse 51 can be made longer as it moves away from the first end face electrode 310 in the short side direction S.

[0094] <Second Electrode> As shown in FIG. 8B, the second electrode 32 includes three or more second regions 42 and a second fuse 52.

[0095] ≪Second Region≫ Three or more (three in the present embodiment) second regions 42 are arranged in the short side direction S of the dielectric film 2. The three second regions 42 are one second non-divided electrode 82 and two second small electrodes 72. That is, in the present embodiment, one second non-divided electrode 82 and two second small electrodes 72 are arranged in the short side direction S of the dielectric film 2.

[0096] ≪Second Fuse≫ The second fuse 52 connects two adjacent second regions 42 out of three or more (three in this embodiment) second regions 42. In this embodiment, two second fuses 52 are present along the short side direction S of the dielectric film 2. The three second regions 42 are connected by the two second fuses 52. That is, the first second fuse 52 connects the second non-divided electrode 82 and the second small electrode 72 (the second small electrode 72 on the right) adjacent to each other in the short side direction S. The second second fuse 52 connects the second small electrodes 72 adjacent to each other in the short side direction S (the second small electrode 72 on the left and the second small electrode 72 on the right). In the short side direction S, the position of the second second fuse 52 is farther from the second end face electrode 320 than the position of the first second fuse 52.

[0097] The length L52 of the second fuse 52 becomes longer as it is farther from the second end face electrode 320 in the short side direction S. That is, in this embodiment, the length L52 (particularly L522) of the second second fuse 52 is longer (L522 > L521) than the length L52 (particularly L521) of the first second fuse 52.

[0098] Here, the length L52 of the second fuse 52 can be adjusted by the depth L62 of the second recess 62. FIG. 8B shows an example where second recesses 62 are present on both the left and right sides of the second fuse 52. In FIG. 8B, when the depths L62 of the second recesses 62 are L621, L622, L623, and L624 in order from the right side, if the second recesses 62 are formed such that (L623 + L624) > (L621 + L622) when the slit width W2 is constant, the length L522 of the second second fuse 52 can be made longer (L522 > L521) than the length L521 of the first second fuse 52. Note that the depth L62 of the second recess 62 may be increased as it is farther from the second end face electrode 320 in the short side direction S (L621 < L622 < L623 < L624). Also in this case, the length L52 of the second fuse 52 can be made longer as it is farther from the second end face electrode 320 in the short side direction S.

[0099] <Effects and Effects> According to this embodiment, the sensitivity of the fuse 5 can be increased for the following reasons.

[0100] When multiple fuses 5 are present along the short-side direction S of the dielectric film 2, applying a voltage between the end electrodes 30 tends to result in a smaller current flowing through fuses 5 located further from the end electrodes 30 compared to fuses 5 located closer to the end electrodes 30. Specifically, the current flowing through the first fuse 51 located further from the first end electrode 310 tends to be smaller than the current flowing through the first fuse 51 located near the first end electrode 310. Similarly, the current flowing through the second fuse 52 located further from the second end electrode 320 tends to be smaller than the current flowing through the second fuse 52 located near the second end electrode 320.

[0101] Therefore, if the lengths L5 of multiple fuses 5 arranged along the short direction S of the dielectric film 2 are uniformly the same, even if the sensitivity of a fuse 5 located near the end electrode 30 is high, the sensitivity of a fuse 5 located far from the end electrode 30 may be low. Specifically, if the lengths L51 of multiple first fuses 51 arranged along the short direction S of the dielectric film 2 are uniformly the same, even if the sensitivity of a first fuse 51 located near the first end electrode 310 is high, the sensitivity of a first fuse 51 located far from the first end electrode 310 may be low. Similarly, if the lengths L52 of multiple second fuses 52 arranged along the short direction S of the dielectric film 2 are uniformly the same, even if the sensitivity of a second fuse 52 located near the second end electrode 320 is high, the sensitivity of a second fuse 52 located far from the second end electrode 320 may be low.

[0102] Therefore, in this embodiment, the length L5 of the fuse 5 is set to increase as it moves away from the end electrode 30 in the short-side direction S of the dielectric film 2. This makes it possible to increase the sensitivity of fuses 5 located far from the end electrode 30, as well as the sensitivity of fuses 5 located near the end electrode 30. In other words, it is possible to reduce the difference in sensitivity among multiple fuses 5 arranged along the short-side direction S of the dielectric film 2. As a result, the overall sensitivity of these fuses 5 can be increased.

[0103] Conversely, in this embodiment, the length L5 of the fuse 5 is designed to decrease as it approaches the end electrode 30 in the short-side direction S of the dielectric film 2. This suppresses heat generation in the fuse 5 located near the end electrode 30.

[0104] (4) Fourth Embodiment Next, the film capacitor 1 according to the fourth embodiment will be described with reference to Figures 9 to 10B. In the fourth embodiment, components similar to those in the first to third embodiments may be denoted by the same reference numerals as in the first to third embodiments, and detailed descriptions may be omitted.

[0105] This embodiment is consistent with the second embodiment in that the direction E in which the fuse 5 extends is inclined with respect to the direction in which the two adjacent regions 4 are aligned (short-side direction S), but differs from the second embodiment in that there are no recesses 6 on either side of the direction E in which the fuse 5 extends.

[0106] In this embodiment, as shown in Figures 9, 10A, and 10B, the direction E in which the fuse 5 extends is inclined with respect to the direction in which two adjacent regions 4 are aligned (short-side direction S). Note that, similar to Figure 1, Figure 9 also illustrates two metallized films 200 not being wound together, but overlapping and offset in the longitudinal direction L.

[0107] Assuming the angle formed between the extending direction E and the short-side direction S of the fuse 5 is θ (tilt angle θ), then 0° < θ < 90° and 0 < cosθ < 1. From the perspective of improving the sensitivity of the fuse 5, the closer θ is to 90° and the closer cosθ is to 0, the more preferable it is. Thereby, the length L5 of the fuse 5 can be increased.

[0108] <Effect> According to the present embodiment, the sensitivity of the fuse 5 can be increased for the following reasons.

[0109] Also in the present embodiment, there is no need to widen the slit width W2, and by increasing the length L5 of the fuse 5, the electrical resistance of the fuse 5 is increased. That is, in the present embodiment, the extending direction E of the fuse 5 is inclined by an inclination angle θ with respect to the direction in which two adjacent regions 4 are arranged (the short-side direction S in the present embodiment). Because of this inclination, even without the presence of the recessed portion 6, the length (W2 / cosθ) of the inclined fuse 5 is longer than the length (slit width W2) of the non-inclined fuse 5. Thereby, the electrical resistance of the fuse 5 can be increased.

[0110] Therefore, according to the present embodiment, the sensitivity of the fuse 5 can be increased. Further, in the present embodiment, since there is no recessed portion 6, it is easy to obtain the electrode area of the film capacitor 1.

[0111] (5) Fifth Embodiment Next, the film capacitor 1 according to the fifth embodiment will be described with reference to FIGS. 11A and 11B. In the fifth embodiment, the same components as those in the first to fourth embodiments may be denoted by the same reference numerals as those in the first to fourth embodiments, and detailed descriptions thereof may be omitted.

[0112] This embodiment is different from the fourth embodiment in that the length L5 of the fuse 5 increases as it moves away from the end surface electrode 30 in the short-side direction S of the dielectric film 2 (see FIGS. 11A and 11B).

[0113] ≪First Fuse≫ As shown in Figure 11A, the length L51 of the first fuse 51 increases in the short-side direction S as it moves away from the first end face electrode 310. That is, in this embodiment, the length L51 of the right-side first fuse 51 (specifically L512) is longer than the length L51 of the left-side first fuse 51 (specifically L511) (L512 > L511).

[0114] Here, the length L51 of the first fuse 51 can be adjusted by the inclination angle θ1. The inclination angle θ1 is the angle between the direction E1 in which the first fuse 51 extends and the direction S in which it is shorter (0° < θ1 < 90°). In Figure 11A, if the inclination angles θ1 of the first fuse 51 are θ11 and θ12 from left to right, then, assuming a constant slit width W2, if the first fuse 51 is formed with an inclination such that θ11 < θ12, the length L512 of the right side of the first fuse 51 can be made longer than the length L511 of the left side of the first fuse 51 (L512 > L511).

[0115] ≪Second Fuse≫ As shown in Figure 11B, the length L52 of the second fuse 52 increases in the short direction S as it moves away from the second end face electrode 320. That is, in this embodiment, the length of the second fuse 52 on the left side L52 (Let's call it L522 in particular) is longer than the length of the second fuse 52 on the right side, L52 (let's call it L521 in particular) (L522 > L521).

[0116] Here, the length L52 of the second fuse 52 can be adjusted by the inclination angle θ2. The inclination angle θ2 is the angle between the direction E2 in which the second fuse 52 extends and the direction S in which it is shorter (0° < θ2 The angle is <90°. In Figure 11B, if the inclination angles θ2 of the second fuse 52 are θ21 and θ22 from right to left, then if the slit width W2 is constant, and the second fuse 52 is formed with an inclination such that θ21 < θ22, then the length L522 of the second fuse 52 on the left side can be made longer than the length L521 of the second fuse 52 on the right side (L522 > L521).

[0117] <Effects and Effects> According to this embodiment, the sensitivity of the fuse 5 can be increased for the same reasons as in the third embodiment.

[0118] In other words, in this embodiment, the length L5 of the fuse 5 is made to increase as it moves away from the end electrode 30 in the short-side direction S of the dielectric film 2. This makes it possible to increase the sensitivity of fuses 5 located far from the end electrode 30, as well as the sensitivity of fuses 5 located near the end electrode 30. In other words, it is possible to reduce the difference in sensitivity among multiple fuses 5 arranged along the short-side direction S of the dielectric film 2. Therefore, the sensitivity of these fuses 5 can be increased overall. Moreover, in this embodiment, there is no recess 6, so it is easy to increase the electrode area of ​​the film capacitor 1.

[0119] Conversely, in this embodiment, the length L5 of the fuse 5 is designed to decrease as it approaches the end electrode 30 in the short-side direction S of the dielectric film 2. This suppresses heat generation in the fuse 5 located near the end electrode 30.

[0120] 3. Variant In the first and second embodiments, both the first electrode 31 and the second electrode 32 include a plurality of regions 4 and a fuse 5, but either the first electrode 31 or the second electrode 32 may include a plurality of regions 4 and a fuse 5.

[0121] In the first and second embodiments, the recessed portion 6 is rectangular when viewed from the thickness direction T of the dielectric film 2, but the shape of the recessed portion 6 is not particularly limited. For example, in addition to a rectangular shape, the recessed portion 6 can be semicircular or the like.

[0122] In the third embodiment, the first recess 61 is present on both sides in the direction E1 in which the first fuse 51 extends (Figure 8A), but the first recess 61 may be present on only one side in the direction E1 in which the first fuse 51 extends. Similarly, in the third embodiment, the second recess 62 is present on both sides in the direction E2 in which the second fuse 52 extends (Figure 8B), but the second recess 62 may be present on only one side in the direction E2 in which the second fuse 52 extends.

[0123] In the second, fourth, and fifth embodiments, the fuse 5 extends from the upper left to the lower right and is inclined, but it may also extend from the lower left to the upper right and be inclined.

[0124] In the first to fifth embodiments, two small electrodes 7 are present along the short direction S of the dielectric film 2, but there may be only one small electrode 7 or three or more small electrodes 7 along the short direction S of the dielectric film 2.

[0125] In the first to fifth embodiments, two fuses 5 are present along the short direction S of the dielectric film 2, but there may be only one fuse 5 or three or more fuses 5 along the short direction S of the dielectric film 2. [Explanation of symbols]

[0126] 1 Film Capacitor 2 Dielectric film 201 Page 1 202 2nd page 31 1st electrode 32 2nd electrode 310 1st end electrode 320 2nd end electrode 4 areas 5 fuses 51 First Fuse 52 Second Fuse 6. Recessed area 61 First depression 62 Second depression 7 small electrode 71 1st small electrode 72 Second small electrode 8 Unsplit electrode 81 1st non-divided electrode 82 2nd undivided electrode E The direction in which the fuse extends E1 Direction of extension of the first fuse E2 Direction of extension of the second fuse S: The direction in which two adjacent regions are aligned (one direction). T Direction connecting the first and second faces L51 Length of the first fuse L52 Second Fuse Length

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; a second electrode disposed on the second surface and facing the first electrode via the dielectric film; and a first end electrode disposed on one side in a direction perpendicular to the direction connecting the first surface and the second surface, and connected to the first electrode. The first electrode includes three or more first regions arranged in one direction, and a first fuse connecting two adjacent first regions among the three or more first regions. At least one of the two adjacent first regions has a first recess that extends in the direction of the first fuse, and is connected to the first fuse inside the first recess. The length of the first fuse increases in the aforementioned direction as it moves away from the first end electrode. Film capacitor.

2. Both of the two adjacent first regions are small electrodes that form a polygonal shape with three or more sides. The film capacitor according to claim 1.

3. One of the two adjacent first regions is a small electrode that has a polygonal shape with three or more sides. The other of the two adjacent first regions is a non-divided electrode that is larger than the small electrode. The film capacitor according to claim 1.

4. The first recess exists on at least one of the three or more sides. The film capacitor according to claim 2.

5. The first recess exists on at least one of the three or more sides. The film capacitor according to claim 3.

6. The direction in which the first fuse extends is inclined with respect to the direction in which the two adjacent first regions are aligned. A film capacitor according to any one of claims 1 to 5.

7. Further comprising a second end face electrode disposed on the other side of the one direction and connected to the second electrode, The second electrode includes three or more second regions aligned in one direction, and a second fuse connecting two adjacent second regions among the three or more second regions. At least one of the two adjacent second regions has a second recess that extends in the direction of the second fuse, and is connected to the second fuse inside the second recess. The length of the second fuse increases in one direction as it moves away from the second end face electrode. The film capacitor according to claim 1.

8. A dielectric film having a first surface and a second surface opposite to the first surface; a first electrode disposed on the first surface; a second electrode disposed on the second surface and facing the first electrode via the dielectric film; a first end electrode disposed on one side of a direction perpendicular to the direction connecting the first surface and the second surface and connected to the first electrode; and a second end electrode disposed on the other side of the same direction and connected to the second electrode. The first electrode includes a first non-divided electrode connected to the first end face electrode, a plurality of first small electrodes arranged in one direction, and a plurality of first fuses connecting adjacent first non-divided electrodes and first small electrodes in one direction, and adjacent first small electrodes in one direction. At least one of the first non-divided electrode and the plurality of first small electrodes has a first recess that extends in the direction of the first fuse, and is connected to the first fuse inside the first recess. The length of the first fuse increases in one direction as it moves away from the first end electrode. The second electrode includes a second non-divided electrode connected to the second end face electrode, a plurality of second small electrodes arranged in one direction, and a plurality of second fuses connecting adjacent second non-divided electrodes and second small electrodes in one direction, and adjacent second small electrodes in one direction. At least one of the second non-divided electrode and the plurality of second small electrodes has a second recess that is recessed in the direction in which the second fuse extends, and is connected to the second fuse inside the second recess. Film capacitor.

9. The length of the second fuse increases in one direction as it moves away from the second end face electrode. The film capacitor according to claim 8.

10. The directions in which the first fuse and the second fuse extend are inclined with respect to the aforementioned one direction. The film capacitor according to claim 8 or 9.

11. A dielectric film having a first surface and a second surface opposite to the first surface; a first electrode disposed on the first surface; a second electrode disposed on the second surface and facing the first electrode via the dielectric film; and a first end electrode disposed on one side in a direction perpendicular to the direction connecting the first surface and the second surface, and connected to the first electrode. The first electrode includes three or more first regions aligned in one direction, and a first fuse that connects two adjacent first regions among the three or more first regions while being inclined with respect to the one direction. The direction in which the first fuse extends is inclined with respect to the direction in which the two adjacent first regions are aligned. The length of the first fuse increases in the aforementioned direction as it moves away from the first end electrode. Film capacitor.

12. Further comprising a second end face electrode disposed on the other side of the one direction and connected to the second electrode, The second electrode includes three or more second regions aligned in one direction, and a second fuse that connects two adjacent second regions among the three or more second regions while being inclined with respect to the one direction. The direction in which the second fuse extends is inclined with respect to the direction in which the two adjacent second regions are aligned. The length of the second fuse increases in one direction as it moves away from the second end face electrode. The film capacitor according to claim 11.

13. A dielectric film having a first surface and a second surface opposite to the first surface; a first electrode disposed on the first surface; a second electrode disposed on the second surface and facing the first electrode via the dielectric film; a first end electrode disposed on one side of a direction perpendicular to the direction connecting the first surface and the second surface and connected to the first electrode; and a second end electrode disposed on the other side of the same direction and connected to the second electrode. The first electrode includes a first non-divided electrode connected to the first end face electrode, a plurality of first small electrodes arranged in one direction, and a plurality of first fuses that are inclined with respect to the one direction and connect adjacent first non-divided electrodes and first small electrodes in that direction, as well as adjacent first small electrodes in that direction. The length of the first fuse increases in one direction as it moves away from the first end electrode. The second electrode includes a second non-divided electrode connected to the second end face electrode, a plurality of second small electrodes arranged in one direction, and a plurality of second fuses that are inclined with respect to that direction and connect adjacent second non-divided electrodes and second small electrodes in that direction, as well as adjacent second small electrodes in that direction. Film capacitor.

14. The length of the second fuse increases in one direction as it moves away from the second end face electrode. The film capacitor according to claim 13.

Images