JP2001319826A - Metallized film capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a metallized film capacitor capable of securing an enough contact area between an electrode film and an outer electrode and therefore having a large current carrying capacity and excellent current-resistant characteristics. SOLUTION: A first electrode film is formed by deposition metal material on the surface of a resin film 12 so as to keep a margin 14 along the one side of the resin film 12, and a second electrode film is formed by depositing metal material on the rear of the resin film 12 so as to keep a margin 14 along the same side of the resin film 12 with the margin 14 on the front surface for the formation of a double-sided metallized film 20. A pair of the double-sided metallized films 20 and a pair of dielectric films 22 are alternately laminated and rolled up into a capacitor element 24, so as to arrange the margins 14 of the metallized films 20 on the opposed sides. Outer electrodes 26a and 26b are each provided to the edge faces of the capacitor element 24 by metal sputtering.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metallized film capacitor, and more particularly to a metallized film capacitor having excellent current resistance.

[0002]

2. Description of the Related Art As shown in FIGS. 9 and 10, a conventional metallized film capacitor 100 has an electrode film 104 made of aluminum, zinc or the like having a thickness of 10 nm on a surface of a dielectric film 102 made of polypropylene or polyethylene. ~ 8
After laminating a pair of metallized films 106 deposited with a thickness of 0 nm, winding is performed by a winder (not shown) to fix the end portion, and a heating and pressurizing process is performed thereon to form a capacitor element 108. External electrodes (metallicon electrodes) 110a and 110b for connecting lead terminals are formed by spraying a metal material on both end surfaces of the capacitor element 108. On the surface of the dielectric film 102, a margin portion 112 (that is, a portion not covered by the electrode film 104) is secured with a predetermined width along one side. Also, on the surface of the other dielectric film 102, a similar margin portion is formed along the side opposite to the above.
112 are secured.

[0003] Inside this metallized film capacitor 110, each electrode film 104 is formed of a dielectric film 102.
Are arranged so as to overlap each other. One end 104a of each laminated electrode film 104 is alternately connected to left and right external electrodes 110a and 110b, respectively. Further, a margin space 114 is formed between the other end 104b of each electrode film 104 and one of the left and right external electrodes 110a, 110b.

[0004] The metallized film capacitor 100 having the above-described configuration is excellent in self-healing property for restoring the insulating property even if a partial dielectric breakdown occurs in the dielectric film 102. Various electric products and other products
It is widely used in electronic devices and the like.

[0005]

The thickness of the electrode film 104 deposited on the surface of the dielectric film 102 of the metallized film capacitor 100 is at most 10 nm to 80 nm as described above.
Therefore, the contact area between each electrode film 104 functioning as a capacitor electrode and the external electrodes 110a and 110b could not be sufficiently ensured. For this reason, the current capacity of the metallized film capacitor 100 cannot be increased, and the self-heating generated when a high current flows causes the dielectric film 102 to be thermally deformed, causing a change in capacitance and a decrease in dielectric strength. There has been a situation in which various characteristics of the capacitor are adversely affected.

The present invention has been devised in order to solve the above-mentioned problems of the conventional example, and can sufficiently secure a contact area between an electrode film and an external electrode.
An object is to realize a metallized film capacitor having a large current capacity and excellent current resistance characteristics.

[0007]

In order to achieve the above-mentioned object, a metallized film capacitor according to the present invention comprises a metal material such that a margin is left on one surface of a resin film along one side thereof. A first electrode film formed by vapor deposition, and a metal material is vapor-deposited on the back surface of the resin film such that a margin portion is left along one side of the same side as the margin portion on the front surface. A plurality of double-sided metallized films formed by forming a second electrode film and a plurality of dielectric films are alternately arranged such that a margin portion between the plurality of double-sided metallized films is disposed on the opposite side. The capacitor element is formed by laminating or laminating the capacitor element, and external electrodes are formed by applying metallikon to both end surfaces of the capacitor element.

In another metallized film capacitor according to the present invention, a first margin portion and a second margin portion are left on front and back surfaces of a first resin film along both side edges thereof. A first double-sided metallized film on which a first electrode film and a second electrode film each formed by evaporating a metal material are formed, and a second resin film, on the front and back surfaces thereof, in the central longitudinal direction. , A third electrode film, a fourth electrode film, a fifth electrode film, and a sixth electrode film each formed by depositing a metal material so as to leave a third margin portion extending along. A second double-sided metallized film and a plurality of dielectric films are sandwiched between both ends of the first electrode film and the second electrode film of the first double-sided metallized film. The third of the second double-sided metallized film Electrode film and the fourth electrode layer, the fifth
The capacitor element is formed by alternately laminating or laminating and winding the capacitor element so as to overlap with the electrode film and the sixth electrode film, and metallicon is applied to both end surfaces of the capacitor element to form external electrodes. I do.

In the metallized film capacitor of the present invention, the electrode films formed on the front and back surfaces of each double-sided metallized film function as capacitor electrodes, and the electrode film on the front surface and the electrode film on the back surface are on the same side. , The contact area between the electrode film and the external electrode can be doubled as compared with the conventional metallized film capacitor. For this reason, the current capacity of the capacitor can be improved as compared with the conventional one, and a capacitor having excellent current resistance characteristics can be realized.

It is desirable that the resin film and the dielectric film are made of the same material. That is,
If the materials of the resin film and the dielectric film are different, the thermal shrinkage ratios of the two are also different. Therefore, when used at a high temperature, the dielectric film may thermally shrink more than the resin film. In this case, the electrode films of the double-sided metallized film that are arranged to face each other via the dielectric film directly face each other without the dielectric film therebetween. As a result, the electrode films of the upper and lower double-sided metallized films intervene. Corona discharge may occur, leading to destruction of the element. On the other hand, as described above, if the materials of the resin film and the dielectric film are the same, the thermal shrinkage of both becomes the same, and the degree of thermal shrinkage of the dielectric film and the resin film when used at a high temperature is also increased. Will be the same. Therefore, the electrode films of the upper and lower double-sided metallized films opposed to each other with the dielectric film interposed therebetween do not directly oppose each other without the dielectric film, thereby preventing the occurrence of corona discharge between the electrode films. Is done.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a first metallized film capacitor 10 according to the present invention is a strip-shaped resin film made of polypropylene, polyethylene or the like.
A first electrode film 16 formed by depositing a metal material such as aluminum or zinc on the surface of the metal layer 12 so as to leave a margin portion 14 (a region where an electrode film described later is not formed) along one side thereof. And at the back of the resin film 12,
A pair of electrodes formed by forming a second electrode film 18 formed by evaporating a metal material such as aluminum or zinc so that the margin portion 14 is left along one side of the surface on the same side as the margin portion 14 A double-sided metallized film 20 and a pair of strip-shaped dielectric films 22 made of polypropylene or the like were alternately laminated such that the margin portions 14 of the pair of double-sided metallized films 20 were arranged on opposite sides. Thereafter (FIG. 1), the end portion is fixed by winding by a winder (not shown), and a flattened capacitor element 24 is formed by applying heat and pressure thereto, and both end faces of the capacitor element 24 are formed. Metallicon for spraying metal materials such as copper and solder is applied to the external electrodes 26a,
26b (FIG. 2).

As a result, as shown in FIG. 2, the double-sided metallized film 20 is arranged to face the dielectric film 22 therebetween. The outer ends 16a, 18a of the first electrode film 16 and the second electrode film 18 of each double-sided metallized film 20 are connected to the left and right external electrodes 26, respectively.
a and 26b, which are connected to external electrodes 26a and 26b on the same side, and the inner ends of the first electrode film 16 and the second electrode film 18
16b and 18b are the first electrode film 16 and the second electrode film 18 respectively.
The external electrodes 26a, 26b opposite to the external electrodes 26a, 26b to which the outer ends 16a, 18a are connected face each other with a margin space 28 therebetween. External electrodes 26a and 26b to which the outer ends 16a and 18a of the first electrode film 16 and the second electrode film 18 of the double-sided metallized film 20 are connected are alternately arranged between the upper and lower double-sided metallized films 20. Has become.

In FIG. 2, 30 is a double-sided metallized film.
An insulating oil such as silicon oil impregnated from both end surfaces of the capacitor element 24 after laminating and winding the 20 and the dielectric film 22. 2, the insulating oil 30 is shown only in the margin space 28 in FIG. 2, but in practice, the insulating oil 30 is also provided between the double-sided metallized film 20 and the dielectric film 22. Existing. As described above, by impregnating the insulating oil 30, air existing between the double-sided metallized film 20 and the dielectric film 22 is rejected to the outside. In addition, it is possible to prevent the occurrence of partial discharge caused by a high electric field in the gap. In addition, the thickness of the dielectric film 22 is not uniform due to an impact applied to the dielectric film 22 during the manufacturing process of the metalized film capacitor 10 or an impact applied to the dielectric film 22 by applying a high voltage to the metalized film capacitor 10. As a result, a portion having a weak dielectric strength may be formed in the dielectric film 22. However, the presence of the insulating oil 30 can sufficiently maintain the insulating property.

In the first metallized film capacitor 10, the first electrode film 16 on the front surface and the second electrode film 18 on the back surface of each double-sided metallized film 20 function as a capacitor electrode. Since the outer end portions 16a and 18b of the first electrode film 16 and the second electrode film 18 are both connected to the same external electrodes 26a and 26b, the electrode films and The contact area with the external electrode can be doubled. For this reason, the current capacity of the capacitor can be improved as compared with the conventional one, and a capacitor having excellent current resistance characteristics can be realized.

In the above, after a pair of double-sided metallized films 20 and a pair of dielectric films 22 are alternately laminated,
Although the example in which the capacitor element 24 is formed by winding is shown, the capacitor element 24 may be formed by alternately laminating a large number of double-sided metallized films 20 and a large number of dielectric films 22.

The resin film 12 and the dielectric film 22 constituting the double-sided metallized film 20 are preferably made of the same material. That is, if the materials of the resin film 12 and the dielectric film 22 are different, the thermal shrinkage ratios of the two are also different. Therefore, when used at a high temperature, the dielectric film 22 may thermally shrink more than the resin film 12. is there. In this case, the electrode films 16 and 18 of the double-sided metallized film 20 opposed to each other with the dielectric film 22 interposed therebetween are directly opposed without the dielectric film 22 therebetween. Corona discharge occurs between the electrode films 16 and 18 of the film 20, which may lead to destruction of the element. On the other hand, if the same material is used for the resin film 12 and the dielectric film 22, the heat shrinkage of both becomes the same, and the dielectric film 22 and the resin film 22 when used at a high temperature are used.
The degree of heat shrinkage of 12 is the same. Therefore, the electrode films 16 and 18 of the upper and lower double-sided metallized films 20 opposed to each other via the dielectric film 22 do not directly face each other without the dielectric film 22 therebetween. This can prevent the occurrence of corona discharge between them.

Further, in order to improve the heat resistance of the capacitor, it is preferable to select a material having excellent heat resistance as the resin film 12 and the dielectric film 22 constituting the double-sided metallized film 20, for example, about 110 degrees. High-density polypropylene, whose electrical properties are kept constant up to a certain point, and PPS, which has a slightly higher dielectric loss tangent but has heat resistance up to 180 degrees
(Polyphenylene sulfide) is suitable.

FIGS. 3 and 4 show a second metallized film capacitor 32 according to the present invention. The second metallized film capacitor 32 is obtained by applying the present invention to a metallized film capacitor having a so-called series structure in which two capacitors are connected in series. This second
The metallized film capacitor 32 of the first resin film
The first electrode film 40 and the second electrode film 40, each of which is formed by depositing a metal material, such that a first margin portion 36 and a second margin portion 38 are left on the front surface and the back surface along both sides thereof. A third margin portion 48 extending along the central longitudinal direction is left on the front and back surfaces of the first double-sided metallized film 44 on which the electrode film 42 is formed and the second resin film 46. A second double-sided metallized film 58 on which a third electrode film 50 and a fourth electrode film 52 each formed by evaporating a metal material, a fifth electrode film 54 and a sixth electrode film 56, The pair of dielectric films 22 are separated from each other by the first electrode film 40 and the second electrode film 42 of the first double-sided metallized film 44 at both ends with the dielectric film 22 interposed therebetween. The third electrode film 50 and the fourth electrode film 52 of the double-sided metallized film 58,
After alternately laminating so as to overlap with the fifth electrode film 54 and the sixth electrode film 56 (FIG. 3), this is wound, and subjected to heat and pressure treatment to form the capacitor element 24. Metallicon is applied to both end faces of the capacitor element 24, and the external electrodes 26
a and 26b are formed (FIG. 4). The third electrode film 50 and the fifth electrode film 54 of the second double-sided metallized film 58, the fourth
The third margin portion 48 electrically insulates the electrode film 52 and the sixth electrode film 56 from each other.

As a result, as shown in FIG. 4, the first electrode film 40 and the second electrode film 42 of the first double-sided metallized film 44 and the second double-sided metal Third electrode film 50 and fourth electrode film in oxidized film 58
52, the first electrode film 40 and the second electrode film 42 in the first double-sided metallized film 44, and the fifth electrode film 54 and the sixth electrode film in the second double-sided metallized film 58. film
Two capacitors connected in series with each other are formed in the overlapping portion with 56. The outer end portions 50a and 52a of the third electrode film 50 and the fourth electrode film 52 in the second double-sided metallized film 58 are both connected to the left external electrode 26a, and the fifth electrode film 54 and the Outer ends 54a, 56 of the electrode film 56 of No. 6
b is connected to the right external electrode 26b. Further, both ends of the first electrode film 40 and the second electrode film 42 in the first double-sided metallized film 44 are separated by left and right external electrodes by a first margin space 60 and a second margin space 62.
26a, 26b, the inner ends 50b, of the third electrode film 50 and the fifth electrode film 54 in the second double-sided metallized film 58.
Between 54b, the inner end 52 of the fourth electrode film 52 and the sixth electrode film 56
The third margin space 64 insulates between b and 56b.

Further, insulating oil 30 impregnated from both end surfaces of the capacitor element 24 is provided between the first to third margin spaces 60, 62, 64 and between the double-sided metallized films 44, 58 and the dielectric film 22. Exists.

In this second metallized film capacitor 32, the first double-sided metallized film 44 has a first electrode film 40 on the front surface, a second electrode film 42 on the back surface, and a second double-sided metallized film 44. The third electrode film 50 on the front surface and the fourth electrode film 52 on the back surface of the film 58, the fifth electrode film 54 on the front surface and the sixth electrode film 56 on the back surface function as a capacitor electrode, and the third electrode film The outer ends 50a, 52a of the 50 and fourth electrode films 52 are both connected to the same left outer electrode 26a, and the outer ends 54a, 56a of the fifth electrode film 54 and the sixth electrode film 56. Are both connected to the same external electrode 26b on the right side, so that the contact area between the electrode film and the external electrode can be doubled. For this reason, the current capacity of the capacitor can be improved, and a capacitor having excellent current resistance characteristics can be realized.

The above-mentioned first metallized film capacitor
For the same reason as in the case of 10, also in the second metallized film capacitor 32, the resin films 34, 46
It is desirable that the dielectric film 22 and the dielectric film 22 be made of the same material and have the same heat shrinkage.

The second metallized film capacitor 32 also includes a first double-sided metallized film 44, a second double-sided metallized film 58, and a pair of dielectric films 22, which are alternately laminated and then wound. Instead of rotating to form the capacitor element 24, a large number of first double-sided metallized films 44 and second double-sided metallized films 58 and a large number of dielectric films 22 are alternately laminated to form the capacitor element 24. Can be formed.

FIG. 5 shows the first metallized film capacitor 10 or the second metallized film capacitor formed by connecting lead terminals 68 to external electrodes 26a and 26b via solder 66.
32, is housed in a substantially rectangular parallelepiped case 70 made of an insulating material such as resin or ceramic, and one end of the lead terminal 68 is led out of the case 70. Further, a resin material such as urethane resin is placed in the case 70. FIG. 7 is a schematic cross-sectional view showing a state in which 72 is filled and a bottom opening of a case 70 is sealed.

The lead terminal 68 has a substantially L-shaped cross section, and includes a first plate-shaped portion 74 connected to the external electrodes 26a and 26b of the metallized film capacitors 10 and 32; A second plate-shaped portion 76 extends outward from the lower end of the plate-shaped portion 74 at an angle of 90 degrees and is connected to a printed circuit board (not shown) or the like.

The first plate-shaped portion 74 has an area which completely covers the entire outer electrodes 26a, 26b of the metallized film capacitors 10, 32, and has a length greater than the depth of the case 70. ing. The distal end of the first plate-shaped portion is fitted into a concave portion 78 formed on the case upper surface 70a. Further, the first plate portion 74 is formed with a through hole 80 for making a solder connection with the external electrodes 26a and 26b of the metallized film capacitors 10 and 32. As shown in FIG. 6, the through-holes 80 are connected to external electrodes of the metallized film capacitors 10 and 32.
26a and 26b, the two solder introduction portions 80a having a substantially rectangular shape are provided at the upper end thereof, and the two solder pool portions 80b having a substantially rectangular shape are provided at the lower end thereof.
Are provided, and the solder introduction part 80a and the solder pool part are provided.
It is connected to 80b by a substantially rectangular solder flow path 80c. The shapes of the solder introduction part 80a, the solder pool part 80b, and the solder flow path part 80c are not limited to a substantially rectangular shape, but may be any shapes.

With the through-hole 80 of the first plate-shaped portion 74 disposed inside the outer shape of the external electrodes 26a and 26b, the solder 66 is poured from the solder introduction portion 80a of the through-hole 80. When,
The solder 66 flows into the solder pool portion 80b through the solder flow channel portion 80c, and the solder 66 fills the solder introduction portion 80a, the solder flow channel portion 80c, and the solder pool portion 80b. When the pouring of the solder 66 is further continued from this state, the solder 66 overflowing from the solder introduction part 80a, the solder flow path part 80c, and the solder pool part 80b forms the first plate-shaped part 74, the external electrodes 26a, 26b, and Between the lead terminals 68 as a result.
Is completely connected to the entire surface of the external electrodes 26a and 26b via the solder 66. In addition, the solder flow path portion 80c
Is formed narrower than the solder introduction part 80a, so that the solder 66 introduced from the solder introduction part 80a can easily flow into the solder pool part 80b.

A circular through-hole 82 is formed in the second plate-shaped portion 76. The solder 66 flows through the circular through-hole 82 so that the second plate-like portion 76 can be attached to a printed circuit board or the like.

As described above, the first plate-shaped portion of the lead terminal 68
74 and the external electrodes 26 of the metallized film capacitors 10 and 32
As a result of connecting the entire surfaces a and 26b via the solder 66, it is possible to prevent the current from intensively flowing to a part of the inside of the metallized film capacitors 10 and 32. That is, as shown in FIG. 7 and FIG. 8, the lead terminal 84 generally used in the prior art also has the first
Is formed in a substantially L-shaped cross section including a plate-shaped portion 86 and a second plate-shaped portion 88, but the lead terminal 84 and the external electrodes 26a, 26b are formed.
Is connected to the external electrodes 26a and 26b with solder 66 by fixing the convex portion 90 formed at the tip of the first plate-shaped portion 86 to the external electrodes 26a and 26b. Therefore, the lead terminal 84 and the external electrode 26a,
26b is only electrically and mechanically firmly connected by solder 66 only at the above-mentioned protrusion 90, and as a result, the current flowing inside the capacitor is connected to the protrusion 90 of the lead terminal 84. Intensively flows between the external electrodes 26a and 26b of the
The self-heating inside the capacitor was large due to the current concentration. On the other hand, in the present invention, as described above, the first plate portion 74 of the lead terminal 68 and the external electrode 26
Since the entire surfaces a and 26b are electrically and mechanically firmly connected via the solder 66, the current flows between the left and right external electrodes 26a and 26b without concentrating on a part, and as a result, In addition, self-heating inside the capacitor can be suppressed. For this reason, it is possible to prevent deterioration of the characteristics of the capacitor such as a change in capacitance and a decrease in dielectric strength caused by deformation of the dielectric film due to self-heating.

Since the first plate portion 74 of the lead terminal 68 is connected to the entire surface of the external electrodes 26a and 26b of the metallized film capacitors 10 and 32, the lead terminal 68 and the metallized film capacitor 10 and 32 are connected. In addition to the increased strength of the connection with the metal plate 32, the heat generated inside the metallized film capacitors 10 and 32 is radiated to the outside through the first plate portion 74 and the second plate portion 76 of the lead terminal 68. can do. Further, since the tip of the first plate-shaped portion 74 of the lead terminal 68 is fitted into the concave portion 78 formed on the case upper surface 70a,
The metallized film capacitors 10 and 32 are firmly fixed in the case 70, and have high mechanical strength.

[0031]

According to the metallized film capacitor of the present invention, compared with the conventional metallized film capacitor,
Since the contact area between the electrode film and the external electrode can be doubled, the current capacity of the capacitor can be improved by that much, and a capacitor excellent in current resistance can be realized. .

[Brief description of the drawings]

FIG. 1 is an exploded sectional view showing a laminated state of a double-sided metallized film and a dielectric film in a first metallized film capacitor.

FIG. 2 is a sectional view showing a first metallized film capacitor.

FIG. 3 is an exploded cross-sectional view showing a laminated state of a first double-sided metallized film, a second double-sided metallized film, and a dielectric film in a second metallized film capacitor.

FIG. 4 is a sectional view showing a second metallized film capacitor.

FIG. 5 is a schematic cross-sectional view showing a state where lead terminals are connected to external electrodes of the first metallized film capacitor or the second metallized film capacitor and housed in a case.

FIG. 6 is a side view showing a connection state between an external electrode and a lead terminal of the first metallized film capacitor or the second metallized film capacitor.

FIG. 7 is a schematic cross-sectional view showing a state where a conventional lead terminal is connected to an external electrode of a first metallized film capacitor or a second metallized film capacitor and housed in a case.

FIG. 8 is a side view showing a connection state between an external electrode of the first metallized film capacitor or the second metallized film capacitor and a conventional lead terminal.

FIG. 9 is an exploded cross-sectional view showing a laminated state of a metallized film in a conventional metallized film capacitor.

FIG. 10 is a sectional view showing a conventional metallized film capacitor.

[Explanation of symbols]

 10 First metallized film capacitor 12 Resin film 14 Margin 16 First electrode film 18 Second electrode film 20 Double-sided metallized film 22 Dielectric film 24 Capacitor element 30 Insulating oil 32 Second metallized film capacitor 34 First resin film 36 First margin portion 38 Second margin portion 40 First electrode film 42 Second electrode film 44 First double-sided metallized film 46 Second resin film 48 Third margin portion 50 Third electrode film 52 Fourth electrode film 54 Fifth electrode film 56 Sixth electrode film

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01G 4/24 301J (72) Inventor Kenji Kawamura 3-20-32 Tenryucho, Okaya City, Nagano Prefecture Okaya Electric Industrial Co., Ltd. F-term (reference) in Nagano Manufacturing Co., Ltd.

Claims (3)

[Claims] A first electrode film formed by depositing a metal material on a front surface of the resin film so as to leave a margin along one side of the resin film; A plurality of double-sided metallized films formed by forming a second electrode film formed by evaporating a metal material so as to leave the margin along one side of the same side as the margin on the surface; Body film and, so that the margins of the plurality of double-sided metallized films are disposed on opposite sides, alternately laminated or laminated and wound to form a capacitor element, and subjected to metallikon on both end faces of the capacitor element. A metallized film capacitor characterized in that external electrodes are formed on the film. 2. The method according to claim 1, further comprising:
A first surface on which a first electrode film and a second electrode film are formed by depositing a metal material, respectively, such that a first margin portion and a second margin portion are left along both sides thereof. A third electrode film formed by depositing a metal material on each of the front and back surfaces of the metallized film and the second resin film such that a third margin portion extending along the central longitudinal direction is left. And a second double-sided metallized film on which the fourth electrode film, the fifth electrode film, and the sixth electrode film are formed, and a plurality of dielectric films. Both end portions of the electrode film and the second electrode film are sandwiched between the dielectric film and the third and fourth electrode films of the second double-sided metallized film, and the fifth electrode film and the fifth electrode film.
The capacitor element is formed by alternately laminating or laminating and winding the capacitor element so as to overlap with the electrode film and the sixth electrode film, and metallicon is applied to both end surfaces of the capacitor element to form external electrodes. Metallized film capacitors. 3. The metallized film capacitor according to claim 1, wherein the resin film and the dielectric film are made of the same material.