JP2001230152A - Coaxial film capacitor and method of manufacturing it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial film capacitor which is increased in density and reduced in size, can store more capacitance, and has a simple structure and, at the same time, for which the characteristics, such as the capacitance, rated voltage, etc., required for capacitors can be adjusted easily and a method of manufacturing the capacitor. SOLUTION: This coaxial film capacitor is formed in a film pipe 5 by winding first electrode layers 3a and 6a, a first dielectric film 4a, second electrode layers 3b and 6b, and a second dielectric film 4b together around a center rod 2 in an overlapping state. Electric charges are taken in and out of the first electrode layers 3a and 6a on one plane side of the pipe 5 and also taken in and out of the second electrode layers 3b and 6b on the other plane side of the pipe 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feedthrough type film capacitor and a method of manufacturing the same, and more particularly, not only to a very simple structure, but also to characteristics required for a capacitor such as capacitance and rated voltage. The present invention relates to a feed-through type film capacitor that can be easily adjusted and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a feedthrough capacitor has been frequently used as an element for constituting a noise filter. The feedthrough capacitor has a structure in which a dielectric layer is formed on the outer surface of a through conductor such as a tube, a rod, or a disk, and electrodes are formed on the outer peripheral surface of the dielectric layer. In conventional feedthrough capacitors,
The dielectric layer was generally made of dielectric ceramics.

[0003] Ceramics are subject to mechanical stress, impact,
And not only breaks easily by electric shock,
Raw materials vary widely, and their formation requires an unstable process such as molding and firing. Therefore, in the conventional feedthrough capacitor, the variation in shape and capacitance was relatively large.

Further, in the case of ceramic capacitors, components for determining characteristics such as the capacitance thereof often rely on machined components. For this reason, variations in characteristics (especially, capacitance) are likely to occur, and components corresponding to the capacitance width are required. As a result, it is difficult to suppress the capacitance width and the required capacitance accuracy within a certain range. In addition, since the withstand voltage per unit thickness is low, when a feedthrough capacitor capable of withstanding a high voltage is formed, the entire shape has to be considerably large. In addition, dielectric ceramics are very expensive, and there has been a demand for a more inexpensive feedthrough capacitor.

Therefore, a feedthrough capacitor in which the dielectric layer is formed using an inexpensive organic material, particularly a synthetic resin, has been devised (for example, Japanese Patent Application Laid-Open Nos. 1-114014 and 1-1-140).
225109). According to these publications, by configuring the dielectric layer using a thermoplastic resin or the like,
Attempts have been made to solve the problems when using the above ceramics.

[0006] These feedthrough capacitors are formed by injection molding a composition containing a thermoplastic resin or insert molding an engineering plastic. Therefore, when it is desired to change the capacitance, it must be changed from the mold, and there is a problem that it is difficult to quickly and inexpensively supply feedthrough capacitors having various capacitance values.

In order to solve this problem, a through-type film capacitor obtained by winding an organic synthetic resin film around an outer peripheral surface of a through conductor and further forming an electrode formed on an outer peripheral surface of the dielectric layer is disclosed in Japanese Patent Laid-Open Publication No. HEI 9-163702. It is disclosed in Japanese Patent Publication No. 5-146771.

[0008]

However, the electrodes in this feed-through type film capacitor are only a through-hole conductor passing through the center and an electrode on the outermost peripheral surface. Therefore, even when trying to change the characteristics such as capacitance, rated voltage, and insulation resistance required for a capacitor, other than appropriately changing the length, thickness, and the like of the organic synthetic resin film wound around the outer peripheral surface of the through conductor. There is no means. In particular, if the organic synthetic resin film is wound many times, the capacitance will be reduced accordingly. Therefore, in order to increase the capacitance of the feedthrough type film capacitor, it is necessary to increase the size of the electrode on the outermost peripheral surface, and there is a problem that the size of the capacitor is increased.

Further, in the feedthrough type film capacitor described in Japanese Patent Application Laid-Open No. 5-146771, one electrode is formed on the outer periphery of a cylindrical shape. Therefore, when a plurality of feed-through film capacitors are arranged in parallel, if the outer peripheries of two adjacent feed-through film capacitors come into contact with each other, a current may flow between them.
It is easy to cause malfunction of the circuit.

In particular, when a plurality of penetrating film capacitors are arranged in parallel in a case, and then the case is filled with an injection resin and hardened, a penetrating film capacitor device is prepared. When capacitors are arranged in parallel, these capacitors are not fixed, and the outer peripheries of two adjacent penetrating film capacitors are likely to come into contact with each other due to vibration or the like. Therefore,
If the injection resin is filled and cured while the outer peripheries of two adjacent penetrating film capacitors are in contact with each other,
Not only is a defective capacitor device manufactured, but it is difficult to visually check whether the outer peripheries of two adjacent through-type film capacitors are in contact with each other in a case filled with the injected resin. In addition, there is a problem that it is very difficult to eliminate defective capacitor devices by visual inspection.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention is not only capable of increasing the density and reducing the size of a feedthrough type film capacitor, and is capable of storing more capacitance but also having a simple structure. It is an object of the present invention to provide a feedthrough type film capacitor capable of easily adjusting characteristics required for a capacitor such as capacitance, rated voltage, and the like, and a method for manufacturing the same.

[0012]

According to the present invention, there is provided a feed-through type film capacitor which solves the above-mentioned problems. The first electrode layers 3a and 6a, the first dielectric film 4
a, a second electrode layer 3b, 6b, and a second dielectric film 4b are superposed and wound to form a film cylinder 5, and the first electrode layer 3a, 6 is formed from one plane side of the film cylinder 5.
In addition to the transfer of charges to and from the a, the charges are transferred to and from the second electrode layers 3b and 6b from the other plane side of the film cylinder 5.

In a specific embodiment, the first and second electrode layers each comprise a metal foil 3, and the first metal foil 3
a and the second metal foil 3 b are shifted in the axial direction of the center rod 2. The first metal foil 3a and the center rod 2 are insulated from each other because the peripheral surface of the center rod 2 is made of the metal 21 and a part thereof is surrounded by the cylindrical insulator 22. One plane of the film cylinder 5 is sealed so that one side edges of the first metal foil 3a constituting one plane of the cylinder 5 are electrically connected to each other, and the other plane of the film cylinder 5 is constituted. The other plane of the film cylinder 5 is sealed so that one side edge of the second metal foil 3b is also electrically connected to each other.

One side edge of the first metal foil 3a is sealed with solder or conductive paste, and the other side edge of the second metal foil 3b is sealed with solder or conductive paste. Then, the second metal foil 3b is electrically connected to the metal 21 on the peripheral surface of the center rod 2. It is preferable that a plurality of plain dielectric films 4 are sandwiched between the metal foils 3.

In another embodiment, the first electrode layer 6
a is laminated on the first dielectric film 4a, the second electrode layer 6b is laminated on the second dielectric film 4b, and an insulating portion 7 is provided on one end side of the first dielectric film 4a. Is provided, and the second dielectric film 4b is provided.
Is also provided with an insulating portion 7 on the other end side. In this case, the first and second electrode layers 6 are preferably formed by applying a conductive paste on the first and second dielectric films 4, respectively.

Specifically, the peripheral surface of the center rod 2 is made of metal 2
The first electrode layer 6a and the center rod 2 are insulated from each other by being partly surrounded by the insulator 22, and the first electrode layer One surface of the film cylinder 5 is sealed so that one side edges of the film cylinder 6a are electrically connected to each other, and
The other plane of the film cylinder 5 is sealed so that one side edge of the second electrode layer 6b constituting the other plane of the film cylinder 5 is also electrically connected to each other. Preferably, one side edge of the first electrode layer 6a is sealed with a conductive paste or solder, and the other side edge of the second electrode layer 6b is sealed with a conductive paste or solder. More specifically, the second electrode layer 6b is formed of a metal 21 on the peripheral surface of the center rod 2.
Is electrically connected to At least one first plain dielectric film 4b is wound so as to sandwich the first dielectric film 4a between the first electrode layer 6a and the second dielectric film 4c. Preferably, at least one second plain dielectric film 4d is wound so as to be sandwiched between the second plain dielectric film 4d and the second plain dielectric film 4d.

By inserting the above-described through-type film capacitor into the metal plate 9 provided with the through-hole 92, one plane of the film cylinder 5 and the bottom surface of the metal plate 9 are brought into contact with each other. The scope of the present invention also includes a penetration type film capacitor device in which the one electrode layers 3a and 6a and the metal plate 9 are electrically connected.

In this case, the metal plate 9 has a concave portion 91, and the through hole 92 is preferably provided in the concave portion 91. The case 93 is formed in a direction opposite to the direction in which the concave portion 91 projects. The through-type film capacitor 1 is mounted inside the case 93 and the case 93
Is preferably filled with a casting resin. Also,
The metal plate 9 is provided with a plurality of through holes 92, and it is also preferable that a plurality of through-type film capacitors 1 are inserted into the through holes 92.

In the method for manufacturing a feedthrough type film capacitor as described above, a part is surrounded by a cylindrical insulator 22,
The first metal foil 3a, the first dielectric film 4a, the second metal foil 3b, and the second dielectric film 4b are provided on the peripheral surface of the central rod 2 having a peripheral surface excluding a part made of the metal 21 by the first metal. The foil 3a and the second metal foil 3b are shifted in the axial direction of the center rod 2, and the first metal foil 3a is superimposed on the cylindrical insulator 22 so that the first metal foil 3a is removed from the metal 21 on the peripheral surface of the center rod 2. At the same time, it is wound around the center rod 2
Metal foil 3a, first dielectric film 4a, second metal foil 3
b, and a foil / film winding step of forming the film cylinder 5 made of the second dielectric film 4b, and sealing one plane of the film cylinder 5 with solder or conductive paste to form one plane of the film cylinder 5 Are electrically connected to each other, and the other plane of the film cylinder 5 is sealed with solder or conductive paste to form another plane of the film cylinder 5. A side sealing step of electrically connecting the other side edges of the second metal foil 3b to each other and electrically connecting the other end edge of the second metal foil 3b to the metal 21 on the peripheral surface of the center rod 2 is included. .

A part is surrounded by a tubular insulator 22,
As a method for producing the center rod 2 whose peripheral surface is partially made of metal 21, a part of the peripheral surface of the center rod 2 whose peripheral surface is formed of metal 21 is made of an insulator before the foil / film winding step. 22; a method of applying a resin around the metal rod 2; a method of inserting the center rod 2 whose peripheral surface is made of metal 21 into the cylindrical insulator 22; A winding method can be given.
In addition, before the foil / film winding step, the longitudinal end of any one of the foil 3 and the film 4 may be adhered to the peripheral surface of the tubular insulator with an adhesive tape.

Another method of manufacturing the above-described feed-through type film capacitor includes a first metal foil 3a, a first dielectric film 4a, a second metal foil 3b, and a second dielectric film 4b.
And the first metal foil 3a and the second metal foil 3b
A foil / film winding step of forming a film cylinder 5 having a through-hole in the axial direction by simultaneously winding in a state shifted in the axial direction, inserting the tubular insulator 22 into the through-hole,
The cylindrical insulator 22 is projected from only one plane in the axial direction, and the central rod 2 whose peripheral surface is made of metal 21 is inserted into the cylindrical insulator 22 so that the central rod 2 is inserted from both ends of the cylindrical insulator 22. The first metal foil 3a constituting one plane of the film cylinder 5 is electrically connected to one side edge of the first cylinder 5 by forming a coating / shaft inserting step of projecting the first metal foil 3a and sealing one plane of the film cylinder 5 with solder or conductive paste. The other side edges of the second metal foil 3b forming the other plane of the film cylinder 5 are electrically connected to each other by sealing the other planes of the film cylinder 5 with solder or conductive paste. In addition, a side sealing step of electrically connecting the other end of the second metal foil 3b to the metal 21 on the peripheral surface of the center rod 2 is included.

A first metal foil 3a, a first dielectric film 4a, a second metal foil 3b, and a second dielectric film 4b are provided around the cylindrical insulator 22, and the first metal foil 3a and the second metal The foil 3b is simultaneously wound in a state shifted in the axial direction of the center rod 2 to form a film cylinder 5 in which the cylindrical insulator 22 protrudes from only one plane in the axial direction around the cylindrical insulator 22. A film winding step, a covering / shaft inserting step in which the center rod 2 whose peripheral surface is made of metal 21 is inserted into the cylindrical insulator 22 and the center rod 2 projects from both ends of the cylindrical insulator 22;
And a method including the aforementioned side surface sealing step.

A first electrode having a part surrounded by a cylindrical insulator 22 and a peripheral part excluding a part formed on the peripheral surface of the central rod 2 made of metal 21 and an insulating part 7 formed on one side edge. Layer 6
A film in which a first dielectric film 4a on which a is laminated and a second dielectric film 4b on which a second electrode layer 6b having an insulating portion 7 formed on the other side edge is laminated are simultaneously wound to form a film cylinder 5 A method of manufacturing a through-type film capacitor including the winding step and the above-described side sealing step is also included in the gist of the present invention.

A part is surrounded by a cylindrical insulator 22,
As a method of manufacturing the center rod 2 whose peripheral surface 21 is partially made of metal, a part of the peripheral surface of the center rod 2 whose peripheral surface is made of metal 21 is made of an insulator 22 before the film winding step.
, A method of applying an insulating resin, a method of inserting the center rod 2 whose peripheral surface is made of metal 21 into the insulator 22, and a method of winding an insulating film around the peripheral surface of the center rod 2. Can be. Further, the leading end of the first dielectric film 4 a in the longitudinal direction of the film may be adhered to the peripheral surface of the insulator 22 with the adhesive tape 8.

As another manufacturing method included in the gist of the present invention, the first electrode layer 6 having an insulating portion 7 formed on one side edge is provided.
a and a second dielectric film 4b on which a second electrode layer 6b having an insulating portion 7 formed on the other side edge is simultaneously wound to form a through hole in the axial direction. In the film winding step for forming the film cylinder 5 having the cylindrical insulator 22, the cylindrical insulator 22 is inserted into the through hole so that the cylindrical insulator protrudes from only one plane of the film cylinder 5 in the axial direction. Includes a covering / shaft inserting step of inserting the center rod 2 whose peripheral surface is made of metal 21 and projecting the center rod 2 from both ends of the cylindrical insulator 22, and the above-described side surface sealing step.

A first dielectric film 4a on which a first electrode layer 6a having an insulating portion 7 formed on one side edge is laminated around the cylindrical insulator 22, and an insulating portion 7 is formed on the other side edge. Second
A film in which the second dielectric film 4b on which the electrode layer 6b is laminated is simultaneously wound to form a film tube 5 in which the cylindrical insulator 22 protrudes from only one plane in the axial direction around the cylindrical insulator 22. In the winding step, the peripheral surface of the cylindrical insulator 22 is made of metal 21
The present invention also provides a method of manufacturing a through-type film capacitor including a covering / shaft inserting step of inserting the center rod 2 made of a material and projecting the center rod 2 from both ends of the cylindrical insulator 22 and the above-described side sealing step. It is included in the purport of.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. (Embodiment 1) As shown in FIG. 1, a feedthrough type film capacitor 1 according to the present invention (hereinafter simply referred to as "capacitor 1")
) Passes through the center rod 2. Around the center rod 2, a first metal foil 3a, a first dielectric film 4a, a third dielectric film 4c, a second metal foil 3b, a second dielectric film 4b, and a fourth dielectric film 4d are provided. It is wound in this order from inside to outside. Thus, the film cylinder 5 is formed around the center rod 2. Although the widths of these foils 3 and film 4 are almost the same, only the first metal foil 3a is wound so as to be shifted from the other foils and films in the axial direction of the center rod 2.

As shown in FIG. 1, the peripheral surface of the center rod 2 is made of a metal 21. In order to insulate the metal 21 from the first metal foil 3a, an insulator 22 covers the peripheral surface of the center rod 2. Surrounding. The cylindrical insulator 22 protrudes from the upper surface of the film cylinder 5 but does not protrude from the lower surface of the film cylinder 5. When the film cylinder 5 is viewed from the lower surface, the lower end of the insulator 22 and the film cylinder 5 are concentrically surrounding the center rod 2 in this order.

As will be described in detail later, the insulator 22 may be formed by winding an organic synthetic film around the peripheral surface of the center rod 2 or by fitting a cylindrical plastic to the center rod 2. Alternatively, it may be formed. In addition, it is also conceivable to form the resin by applying an insulating resin around the center rod 2 and then curing the resin.

As will be described later, the metal 21 on the peripheral surface of the center rod 2 is electrically connected to the second metal foil 3b. However, the center rod 2 may be a so-called metal rod made of only metal. Alternatively, a metal sprayed on the surface of a rod made of a non-conductive material such as plastic may be used.

The upper and lower surfaces of the film cylinder 5 are sealed with solder or conductive paste applied to these surfaces, respectively. It is preferable that the solder or the conductive paste is applied flat and perpendicular to the axial direction of the center rod 2. In particular, as will be described later, when a capacitor device is manufactured by inserting a through-type film capacitor obtained upside down into a metal plate having a concave portion having a through-hole formed therein, the concave portion and the film are formed. Since the metal plate and the first metal foil 3a are electrically connected to each other by contact with the upper surface of the cylinder 5, the upper surface of the film cylinder 5 is flat to secure these electrical connections. This is because it is desirable. Comparing solder or conductive paste,
In the present embodiment, a metal foil is used as the electrode thin film, and from the viewpoint that the upper and lower surfaces of the film cylinder 5 can be more securely and easily sealed with the metal foil, it is possible to use solder. preferable.

One end (upper end) of the first metal foil 3a constituting the upper surface of the film cylinder 5 is electrically connected to the lower surface of the film cylinder 5 by sealing with the solder and the conductive paste. The other edge (lower edge) of the second metal foil 3b is also electrically connected. Further, on the lower surface of the film cylinder 5, since the solder or the conductive paste is applied around the center rod 2, as a result, the second metal foil 3b and the periphery of the center rod 2 around the center rod 2 via the solder or the conductive paste. The metal is electrically connected. Accordingly, electric charges enter and exit from the upper surface of the film cylinder 5 to the first metal foil 3a, and electric charges enter and exit from the lower surface of the film cylinder 5 to the second metal foil 3b.

As described above, in the present invention, the metal foil 3
In addition, since the dielectric film 4 is wound around the center rod 2, the lengths of the metal foil 3 and the dielectric film 4 are appropriately adjusted according to the characteristics such as capacitance, rated voltage, and insulation resistance required for a capacitor. By adjusting, a through-type film capacitor having desired characteristics can be obtained. In addition, such a through-type film capacitor has an advantage that its structure is extremely simple and therefore easy to make. The method for manufacturing the feedthrough film capacitor according to the present invention will be described later.

Even when a feedthrough film capacitor having a high capacitance is desired, unlike the above-mentioned conventional example, a very thin metal foil 3 and a dielectric film 4 are wound around the center rod 2. Because it only needs to be turned, even a feedthrough film capacitor with high capacitance,
Smaller (ie smaller) compared to the conventional example
A feed-through film capacitor is obtained. Of course, the capacitance can also be increased by reducing the thickness of the dielectric film 4. When the center rod 2 is made of a metal rod, the metal foil 3 is wound therearound, so that noise generated from the center rod 2 can be removed.

In the conventional example, in order to increase the capacitance of the feedthrough film capacitor, it is necessary to increase the size of the electrode on the outermost surface. Therefore, the size of the electrode on the outermost surface depends on the required capacitance. Must be changed. Therefore, it is necessary to increase or decrease the electrodes on the outermost peripheral surface according to the product, and as a result, it is difficult to handle them in a unified manner, but in the present invention, the capacitance of the feedthrough film capacitor is increased. In order to make the foil 3
Since it is only necessary to adjust the length of the film 4, uniform handling is extremely easy.

Further, a film cylinder 5 is provided on the first metal foil 3a.
The electric charge is taken in and out from the upper surface of the first metal foil 3b, and the electric charge is taken in and out from the lower surface of the film cylinder 5 in the second metal foil 3b.
The first dielectric film 4a, the second metal foil 3b, and the second
Since the dielectric film 4b is formed in this order, the outer peripheral surface of the side surface of the film cylinder 5 must be in contact with the dielectric film 4 (second
It is composed of a dielectric film 4b). That is, in the present invention, unlike the conventional example, the electric charges are taken in and out from the upper and lower surfaces of the film cylinder 5 without providing the metal electrodes on the side surfaces of the film cylinder 5, and the side surfaces of the film 5 are formed of the dielectric film 4. Therefore, when a plurality of feedthrough film capacitors are arranged in parallel, even if the outer peripheries of two adjacent feedthrough film capacitors are in contact with each other, current is prevented from flowing between them. You.

It should be noted that, in FIG.
Although the two dielectric films 4a and 4c are sandwiched, the number of the dielectric films sandwiched between the metal foils 3 may be one, or three or more. Further, by setting the number of dielectric films sandwiched between the metal foils 3 to two or more, the capacitance stored in the capacitor 1 can be easily increased or decreased.

Although the metal foil constituting the metal foil 3 is not particularly limited, it is preferable to use an aluminum foil as the metal foil 3 from the viewpoint of easy availability and low cost. The dielectric film 4 is made of a plain dielectric film having no metal electrode deposited on any of its surfaces, and it is preferable to use a polyester film and a polyolefin film as in the case of the metal foil 3. As the polyester film, a polyethylene naphthalate film is preferable, and as the polyolefin film, a polypropylene film is preferable.

(Manufacturing Method) Next, a method of manufacturing the above-described feed-through film capacitor will be described. As shown in FIG. 2, first, a first metal foil 3a, a first dielectric film 4a,
The second metal foil 3b and the second dielectric film 4a are superposed and wound to form a film cylinder 5 having a cavity in the center. Next, after inserting the separately prepared center rod 2 into the cylindrical insulator 22, the insulator is inserted into the cavity of the film cylinder 5. Finally, both planes of the film cylinder 5 are sealed with solder or dielectric paste. The method as shown in FIG. 2 has the advantage that the winding of the metal foil 3 and the film 4 is very simple.

As another manufacturing method, as shown in FIG. 3, first, a cylindrical insulator 22 is prepared, and a first metal foil 3a, a first dielectric film 4a, a second
The metal foil 3b and the second dielectric film 4a are overlapped and wound. Next, the separately prepared center rod 2 is inserted into the cylindrical insulator 22. Finally, both planes of the film cylinder 5 are sealed with solder or dielectric paste. In the method as shown in FIG. 3, the metal foil 3 is wrapped around the cylindrical insulator 22.
In order to wind up the film 4, the center rod 2 can be directly inserted into the center of the obtained film cylinder 5. In the method shown in FIG. 2, when forming the film tube 5, the metal foil 3 and the film 4 are wound around a shaft separate from the cylindrical insulator 22, and after forming the film tube 5, It is necessary to remove the core from the film cylinder 5,
Since the method shown in FIG. 3 does not require such a method, it is possible to save the time and effort for the creation.

As still another manufacturing method, as shown in FIG. 4, a method of directly winding the metal foil 3 and the film 4 around the center rod 2 can be mentioned. In FIGS. 2 and 3, the cylindrical insulator 22 is prepared in advance as a separate component, but in FIG. 4, an insulating resin is applied to the center rod 2 whose peripheral surface is made of metal. An insulator 22 is formed. The insulator 22 may be formed by winding an insulating film around the center rod 2 in advance instead of applying the insulating resin.

Next, the first metal foil 3a, the first dielectric film 4a,
The second metal foil 3b and the second dielectric film 4a are superposed and wound. Finally, both planes of the film cylinder 5 are sealed with solder or dielectric paste. In such a method, the insulator 22 and the metal foil 3
In addition, since the film 4 is wound, there is no need to insert the center rod 2 into the cylindrical insulator 22. Therefore, the penetration type film capacitor can be easily formed as compared with the manufacturing method shown in FIGS. Can be created.

(Embodiment 2) As shown in FIG. 5, in a capacitor 1 according to another embodiment of the present invention, the center rod 2 penetrates the center of the capacitor 1 according to Embodiment 1. , But the film cylinder 5 formed by being wound around the center rod 2 is different. In this embodiment, the film cylinder 5 is formed by winding a plurality of dielectric films 4 without using a metal foil, and as shown in FIG. Layer 6 is laminated.

As a method of laminating the electrode layer 6 on the dielectric film 4, a method of applying and curing a conductive paste on the dielectric film 4 and a method of depositing a metal on the dielectric film 4 can be mentioned. Preferably, a method of applying a conductive paste to the dielectric film 4 and curing the paste is used. This is because, when a metal is formed on the dielectric film 4 by vapor deposition, the thickness of the metal is at most 0.1 μm, so that when the upper and lower surfaces of the film cylinder 5 are sealed, breakage of the metal occurs. In some cases, it is difficult to ensure electrical connection, and the thickness of the electrode layer 6 formed by applying and curing a conductive paste on the dielectric film 4 is approximately 2 to 30 μm. Because
This is because breakage and the like hardly occur in the electrode layer 6, and electrical connection can be ensured. Such a conductive paste is, for example, a product name “S-5000” manufactured by Mitsui Kinzoku Paint Chemical Co., Ltd., a product name “DW manufactured by Toyobo Co., Ltd.”
-114L-1 ".

As shown in FIG. 5, in the present embodiment, the first dielectric film 4a on which the first electrode layer 6a is laminated, and the solid color without the electrode layer 6 are laminated around the center rod 2. Third dielectric film 4c, second electrode layer 6b
And a second dielectric film 4b on which the
Are not laminated, the fourth dielectric film 4d is
It is wound multiple times in this order from inside to outside. Thus, the film cylinder 5 is formed around the center rod 2. The central rod 2 is the same as in the first embodiment, and the peripheral surface of the central rod 2 is made of a metal 21. In order to insulate the metal 21 from the first electrode layer 6a, the peripheral surface of the central rod 2 is formed. Is surrounded by an insulator 22. Although the insulator 22 is as described in Embodiment 1, in this embodiment, a manufacturing method different from that described in Embodiment 1 can be used. This will be described later.

Although the widths of these dielectric films 4 are almost the same, one end of the first dielectric film 4a (lower side in the drawing) and the other end of the second dielectric film 4b (upper side in the drawing).
Is provided with an insulating portion 7 on which the electrode layer 6 is not laminated. As a method of providing the insulating portion 7, when a conductive paste is applied and cured to laminate the electrode layer 6, a method in which the conductive paste is not applied to a portion where the insulating portion 7 is formed is given. When the layer 6 is formed by vapor deposition, a method of applying oil to a portion where the insulating portion 7 is formed (oil margin method) or a method of vapor-depositing metal in a state where tapes are overlapped (tape margin method) is used. No.

The sealing of the upper and lower surfaces of the film cylinder 5 is the same as in the first embodiment, but in this embodiment, the electrode layer 6 is formed on the dielectric film 4 as described above. It is preferable to laminate by applying and curing a conductive paste. For this reason, when comparing solder or a conductive paste used for sealing, in the present embodiment, an electrode layer formed from the conductive paste is used. It is preferable to use a conductive paste from the viewpoint that the upper and lower surfaces of the film cylinder 5 can be more reliably and easily sealed by being familiar with 6.

The sealing of the upper and lower surfaces of the film cylinder 5 is the same as that of the first embodiment in that the solder or the conductive paste is preferably applied flat.

Also in the present embodiment, one end (upper end) of the first electrode layer 6a forming the upper surface of the film cylinder 5 is electrically connected by sealing with solder and conductive paste. The other end (lower end) of the second electrode layer 6b constituting the lower surface of the film cylinder 5 is also electrically connected. Further, on the lower surface of the film cylinder 5, since the solder or the conductive paste is applied around the center rod 2, as a result, the second electrode layer 6b and the periphery of the center rod 2 around the center rod 2 via the solder or the conductive paste. The metal is electrically connected. Therefore, electric charges enter and exit from the upper surface of the film cylinder 5 to the first gold layer 6a, and electric charges enter and exit from the lower surface of the film cylinder 5 to the second electrode layer 6b.

As described above, also in the present embodiment, the desired characteristics can be obtained by appropriately adjusting the length of the dielectric film 4 in accordance with the characteristics such as the capacitance, rated voltage, and insulation resistance required for the capacitor. Is obtained. In addition, such a through-type film capacitor has an advantage that its structure is extremely simple and therefore easy to make. The method for manufacturing the feedthrough film capacitor according to the present invention will be described later.

Further, even with a feedthrough film capacitor having a high capacitance, a feedthrough film capacitor smaller (ie, downsized) as compared with the conventional example can be obtained. This is similar to the first embodiment in that noise can be removed.
Furthermore, it is extremely easy to perform unified handling, and when the capacitors 1 are arranged next to each other, even when the outer circumferences come into contact with each other, it is possible to prevent current from flowing between them. Same as in the first embodiment.

In FIG. 5, one plain dielectric film 4 c is sandwiched between the dielectric films 4 a and 4 b on which the electrode layers 6 are laminated, but the dielectric film 4 c is sandwiched between the metal foils 3. The body film may be two or more. By setting the number of the plain dielectric films to two or more, the capacitance stored in the capacitor 1 can be easily increased or decreased. The material of the dielectric film 4 is the same as in the first embodiment.

(Manufacturing Method) Next, a method of manufacturing the feedthrough film capacitor according to the present embodiment will be described. The feedthrough film capacitor according to the present embodiment can be manufactured by the manufacturing method described in the first embodiment as shown in FIGS. 2 to 4, but the method described below is used. Can also be created.
The method described below can also be used when manufacturing the feedthrough film capacitor described in the first embodiment.

As shown in FIG. 6, first, a resin is applied to the peripheral surface of the central rod 2 and cured, or an insulating film is wound around the central rod 2 to form an insulator 22. Further, a conductive paste is applied to the dielectric film 4 and cured, and the electrode layer 6 is laminated. And the first
First dielectric film 4a on which electrode layer 6a is laminated, plain third dielectric film 4 on which electrode layer 6 is not laminated
c, the first dielectric film 4 on which the second electrode layer 6b is laminated
b and a plain fourth dielectric film 4d on which the electrode layer 6 is not laminated. After the longitudinal end of the first dielectric film 4 a of the superposed films 4 is attached to the insulator 22 using the adhesive tape 8, the film 4 is wound around the center rod 2.

After winding, one plane side of the film cylinder 5 obtained by winding the film 4 around the center rod 2 is soldered or conductive paste in the same manner as in the manufacturing method described in the first embodiment. By sealing with (as described above, in this case, preferably a conductive paste), the electrode layers 6a constituting one plane of the film cylinder 5 are electrically connected to each other. Similarly, by sealing the other plane side of the film cylinder 5, the electrode layer 6 forming the other plane of the film cylinder 5 is sealed.
b are electrically connected to each other. Furthermore, the film cylinder 5
On the other plane side, the conductive paste is
As a result, the second electrode layer 6b and the metal around the center rod 2 are electrically connected via the conductive paste.

(Regarding the Capacitor Device) The feedthrough film capacitors according to Embodiments 1 and 2 obtained as described above are used as one mode of use for assembling a capacitor device as described below. .

As shown in FIG. 7, the obtained feedthrough film capacitor 1 is
1 is placed from above on a metal plate 9 provided with. Recess 91
Is provided with a through hole 92 such that the tip of the center rod 2 protrudes from the metal plate 9. Also, so that a plurality of feed-through film capacitors 1 can be placed in the concave portions 91,
The recess 91 is provided with a plurality of through holes 92. In addition, by using a plurality of through holes 92 in this way, the characteristics such as the capacitance of the entire through-type film capacitor device can be freely changed. The unused holes 92 (that is, the holes in which the tip of the center rod 2 of the capacitor 1 does not protrude from the metal plate 9) are appropriately closed.

Next, the case 93 is erected in the direction opposite to the direction in which the recess 91 projects. Here, the case 93 is first attached to the metal plate 9 after the capacitor 1 is inserted into the concave portion 91, but the capacitor 1 may be inserted into the concave portion 91 after the case 93 is first attached to the metal plate 9. That is, as a result, the capacitor 1 is provided inside the case 93.

Next, the casting resin is filled in the case 93. Examples of such a casting resin include an epoxy resin and a urethane resin. The through-type film capacitor device thus obtained (hereinafter simply referred to as “capacitor device”) has a first metal foil 3 a and a first electrode layer 6 a as first electrode layers electrically connected to a metal plate 9. And a second metal foil 3 as a second electrode layer
b. The second electrode layer 6b is electrically connected to the metal on the peripheral surface of each center rod 2. As described above, even when the outer peripheries of adjacent capacitors 1 are in contact with each other, current is prevented from flowing between them. After the casting resin is filled and cured, the metal plate 9 may be attached in the same manner by turning upside down (that is, turning the top and bottom of the through-type film capacitor 1 upside down). That is, the capacitor 1 may be interposed between the two metal plates 9.

[0060]

According to the present invention, the metal foil 3 and the dielectric film 4, or the conductive paste is applied on the surface.
Since the cured dielectric film 4 is wound around the center rod 2, the capacitance required as a capacitor,
By appropriately adjusting the lengths of the foil 3 and the film 4 constituting the film cylinder 5 according to the characteristics such as the rated voltage and the insulation resistance, a through-type film capacitor having desired characteristics can be obtained. In addition, such a through-type film capacitor has an advantage that its structure is extremely simple and therefore easy to make.

Even when a feedthrough film capacitor having a high capacitance is desired, unlike the above-described conventional example, a very thin metal foil 3 and a dielectric film 4,
Alternatively, since it is only necessary to wind the dielectric film 4 in which the conductive paste is applied and cured on the surface around the center rod 2, even a through-type film capacitor having a high capacitance can be compared with the conventional example. And smaller (ie,
A (through miniaturized) feedthrough type film capacitor is obtained. Of course, the capacitance can also be increased by reducing the thickness of the dielectric film 4. When the center rod 2 is made of a metal rod, the metal foil 3 is wound therearound, so that noise generated from the center rod 2 can be removed.

In the conventional example, in order to increase the capacitance of the feedthrough type film capacitor, it is necessary to increase the size of the electrode on the outermost peripheral surface. Must be changed. Therefore, it is necessary to increase or decrease the electrodes on the outermost peripheral surface according to the product, and as a result, it is difficult to handle them in a unified manner, but in the present invention, the capacitance of the feedthrough film capacitor is increased. In order to make the foil 3
Since it is only necessary to adjust the length of the film 4, uniform handling is extremely easy.

In the present invention, unlike the conventional example, the electric charges are taken in and out from the upper and lower surfaces of the film cylinder 5 without providing the metal electrodes on the side surfaces of the film cylinder 5, and the side surfaces of the film 5 are covered with the dielectric film 4. With this configuration, when a plurality of feed-through film capacitors are arranged in parallel, even if the outer peripheries of two adjacent feed-through film capacitors come into contact with each other, current does not flow between them. Is done. This corresponds to the capacitor 1 as shown in FIG.
Are particularly useful in a capacitor device in which a plurality of are arranged in parallel. This is because one through-type film capacitor 1 falls down so as to lean on the adjacent capacitor 1 before filling with the casting resin, and the outer peripheries of two adjacent through-type film capacitors are in contact with each other. Even if the casting resin is filled in this state, the adjacent two through-type film capacitors are insulated because the side surfaces of the film 5 are formed of the dielectric film 4, so that the characteristics of the capacitors such as the capacitance change. Because there is nothing.

By adjusting the number of plain dielectric films, the capacitance stored in the capacitor 1 can be easily increased or decreased.

[Brief description of the drawings]

FIG. 1 is a diagram showing a feed-through film capacitor 1 according to a first embodiment.

FIG. 2 is a diagram illustrating a method of manufacturing the feedthrough film capacitor 1 according to the first embodiment.

FIG. 3 is a diagram showing another method of manufacturing the feedthrough film capacitor 1 according to the first embodiment.

FIG. 4 is a diagram showing still another method of manufacturing the feedthrough film capacitor 1 according to the first embodiment.

FIG. 5 is a diagram showing a feed-through film capacitor 1 according to a second embodiment.

FIG. 6 is a diagram illustrating a method of manufacturing the feedthrough film capacitor 1 according to the second embodiment.

FIG. 7 is a diagram showing a method of manufacturing a feed-through film capacitor device.

[Explanation of symbols]

 1: Penetration type film capacitor 2: Center rod 21: Metal 22: Insulator 3: Metal foil 3a: First metal foil 3b: Second metal foil 4: Dielectric film 4a: First dielectric film 4b: Second dielectric Body film 4c: Third dielectric film 4d: Fourth dielectric film 5: Film cylinder 6: Electrode layer 6a: First electrode layer 6b: Second electrode layer 7: Insulating part 8: Adhesive tape 9: Metal plate 91: Recess 92: Through hole 93: Case

Continued on the front page (72) Inventor Mikio Sakata 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Reference) 5E082 AB06 BC11 BC39 CC09 EE03 EE04 EE07 EE35 FG06 FG35 FG36 JJ06 JJ26 JJ27 LL11

Claims (32)

[Claims] 1. A first electrode layer (3a, 6a), a first dielectric film (4a), a second electrode layer (3b, 6b), and a second dielectric film (3) are provided on a peripheral surface of a center rod (2). 4
b), a film tube (5) formed by overlapping and winding the film tube is formed, and charges are taken in and out of the first electrode layers (3a and 6a) from one plane side of the film tube (5); (5) A feed-through film capacitor in which electric charges are transferred into and out of the second electrode layer (3b, 6b) from the other plane side. 2. The first and second electrode layers are each made of a metal foil (3), and the first metal foil (3a) and the second metal foil (3b) are connected to an axis of the center rod (2). 2. The feed-through film capacitor according to claim 1, wherein the film capacitor is shifted in a direction. 3. The peripheral surface of the center rod (2) is made of metal (2).
1), and a part of the first metal foil (3a) is surrounded by the cylindrical insulator (22).
And the center rod (2) are insulated from each other, and the first metal foil (3
a) one surface of the film cylinder (5) is sealed so that one side edge is electrically connected to each other, and a second metal foil ( 3
3. The feedthrough film capacitor according to claim 2, wherein the other surface of the film cylinder is sealed so that one side edge of b) is also electrically connected to each other. 4. One side edge of the first metal foil (3a) is sealed with solder or conductive paste, and the other side edge of the second metal foil (3b) is sealed with solder or conductive paste. The feed-through film capacitor according to claim 3, wherein 5. The feed-through film capacitor according to claim 3, wherein the second metal foil (3b) is electrically connected to a metal (21) on a peripheral surface of the center rod (2). 6. A plurality of plain dielectric films (4) sandwiched between said metal foils (3).
The feed-through film capacitor according to any one of the above. 7. The first electrode layer (6a) is laminated on the first dielectric film (4a), and the second electrode layer (6b) is laminated on the second dielectric film (4b). And the first dielectric film (4
An insulating portion (7) is provided at one end of the first dielectric film (a), and an insulating portion (7) is also provided at the other end of the second dielectric film (4b).
The feed-through film capacitor according to claim 1, further comprising: 8. The method according to claim 7, wherein the first and second electrode layers are formed by applying a conductive paste on the first and second dielectric films, respectively. The penetration type film capacitor according to the above. 9. The peripheral surface of the central rod (2) is made of metal (2).
The first electrode layer (6a) and the center rod (2) are insulated from each other by being partially surrounded by an insulator (22), and the film cylinder (1) 5) First electrode layer (6a) constituting one plane
The one surface of the film cylinder (5) is sealed so that one side edges of the film cylinder are electrically connected to each other, and the second electrode layer (6b) constituting the other plane of the film cylinder (5) The through-type film capacitor according to claim 7, wherein the other surface of the film cylinder (5) is sealed so that one side edge is also electrically connected to each other. 10. One side edge of the first electrode layer (6a) is sealed with a conductive paste or solder, and
The feed-through film capacitor according to claim 9, wherein the other side edge of the electrode layer (6b) is also sealed with a conductive paste or solder. 11. The feed-through film capacitor according to claim 9, wherein the second electrode layer (6b) is electrically connected to a metal (21) on a peripheral surface of the center rod (2). 12. At least one first plain dielectric film (4b) is wound so as to sandwich the first dielectric film (4a) between the first dielectric film (4a) and the first electrode layer (6a). At least one of the second dielectric films (4c) is sandwiched between the second dielectric film (4c) and the second electrode layer (6b).
The feed-through film capacitor according to any one of claims 7 to 11, wherein a plurality of second plain dielectric films (4d) are wound. 13. The film cylinder (5) wherein the through-type film capacitor (1) according to claim 1 is inserted into a metal plate (9) provided with a through hole (92). A through-type film capacitor device in which the first electrode layers (3a, 6a) and the metal plate (9) are electrically connected by bringing one plane of the metal plate (9) into contact with the bottom surface of the metal plate (9). . 14. The feed-through type film capacitor according to claim 13, wherein the metal plate (9) has a concave portion (91), and the concave portion (91) is provided with the through hole (92). apparatus. 15. A case (93) is provided upright in a direction opposite to a direction in which the recess (91) protrudes, and the through-type film capacitor (1) is provided inside the case (93). The through-type film capacitor device according to claim 13, wherein the case (93) is filled with a casting resin. 16. The metal plate (9) has a plurality of through holes (9).
The through-type film capacitor device according to any one of claims 13 to 15, wherein 2) is provided, and a plurality of through-type film capacitors (1) are inserted into the through holes (92). 17. A first metal foil (3a) which is partially surrounded by a cylindrical insulator (22) and whose peripheral surface excluding said part is formed on the peripheral surface of a central rod (2) made of metal (21). , The first dielectric film (4a), the second metal foil (3b), and the second dielectric film (4b) by the first metal foil (3a).
And the second metal foil (3b) are shifted in the axial direction of the center rod (2), and the first metal foil (3a) is superimposed on the cylindrical insulator (22). 3a) is simultaneously wound while being insulated from the metal (21) on the peripheral surface of the center rod (2), and the first metal foil (3a) and the first dielectric are wound around the center rod (2). Film (4
a), a foil / film winding step of forming a film cylinder (5) composed of the second metal foil (3b) and the second dielectric film (4b), and one plane of the film cylinder (5). By sealing with a solder or a conductive paste, a first surface constituting one plane of the film cylinder (5) is formed.
One side edges of the metal foil (3a) are electrically connected to each other, and the other plane of the film cylinder (5) is sealed with solder or a conductive paste to thereby connect the other plane of the film cylinder (5). The other side edges of the constituent second metal foil (3b) are electrically connected to each other, and the second metal foil (3b) is electrically connected to each other.
b) and the metal (2) on the peripheral surface of the center rod (2).
1) A method for producing a feedthrough film capacitor, comprising a side sealing step of electrically connecting the film capacitor. 18. A part of a peripheral surface of a center rod (2) having a peripheral surface made of a metal (21) is covered with an insulator (22) before the foil / film winding step, thereby forming a part. 18. The penetration type according to claim 17, which comprises a step of forming an insulative coated center rod in which a central rod (2) is formed by surrounding an insulator (22) and a peripheral surface excluding the part is made of a metal (21). Manufacturing method of film capacitor. 19. The insulator (22) is made of a resin,
The method for manufacturing a feed-through film capacitor according to claim 18, wherein a part of the peripheral surface of the central rod (2) whose peripheral surface is made of a metal (21) is coated by applying the resin. 20. Inserting a central rod (2) whose peripheral surface is made of a metal (21) into said cylindrical insulator (22), whereby the central rod (2) whose peripheral surface is made of a metal (21) is formed. The method for manufacturing a feed-through film capacitor according to claim 18, wherein a part of the peripheral surface is covered. 21. By winding an insulating film around the peripheral surface of a center rod (2) whose peripheral surface is made of metal (21),
The method for manufacturing a feed-through film capacitor according to claim 18, wherein a part of the peripheral surface of the center rod (2) whose peripheral surface is made of metal (21) is coated. 22. Before the foil / film winding step, a first metal foil (3a), a first dielectric film (4a), a second
Affixing an adhesive tape for attaching one of the foil / film lengthwise ends of the metal foil (4a) and the second dielectric film (4b) to the peripheral surface of the cylindrical insulator with an adhesive tape. The method for manufacturing a feed-through film capacitor according to claim 17, further comprising a mounting step. 23. A first metal foil (3a), a first dielectric film (4a), a second metal foil (3b), and a second dielectric film (4b) are combined with the first metal foil (3a). A foil / film winding step of simultaneously winding the second metal foil (3b) in a state shifted in the axial direction of the center rod (2) to form a film cylinder (5) having a through hole in the axial direction. A cylindrical insulator (22) is inserted into the through-hole, and the cylindrical insulator (2) is axially inserted from only one plane of the film cylinder (5).
2) is projected, and a center rod (2) whose peripheral surface is made of metal (21) is inserted into the tubular insulator (22), and the central rod (2) is inserted from both ends of the tubular insulator (22). A first metal foil forming one surface of the film cylinder (5) by covering the shaft and inserting the shaft to protrude 2), and sealing one surface of the film cylinder (5) with solder or conductive paste; (3a) One side edge is electrically connected to each other, and the other plane of the film cylinder (5) is sealed with a solder or a conductive paste to form another plane of the film cylinder (5). Second metal foil (3
b) a side surface electrically connecting the other side edges to each other and electrically connecting the other end edge of the second metal foil (3b) and the metal (21) on the peripheral surface of the center rod (2). A method for producing a through-type film capacitor including a sealing step. 24. A first metal foil (3a), a first dielectric film (4a), a second metal foil (3b), and a second dielectric film (4b) are provided around a cylindrical insulator (22). The first metal foil (3a) and the second metal foil (3b) are simultaneously wound while being shifted in the axial direction of the center rod (2), and the cylindrical insulator is axially formed only from one plane. A foil / film winding step of forming a film cylinder (5) from which the (22) protrudes around the cylindrical insulator (22); a center of the cylindrical insulator (22) having a peripheral surface made of a metal (21); A coating / shaft inserting step of inserting the rod (2) to project the center rod (2) from both ends of the cylindrical insulator (22); and soldering or conducting paste on one plane of the film cylinder (5). The first metal forming one plane of the film cylinder (5) by sealing with Foil (3a)
Are electrically connected to each other, and the other surface of the film cylinder (5) is sealed with solder or conductive paste to form a second metal forming the other plane of the film cylinder (5). The other side edges of the foil (3b) are electrically connected to each other, and the other end edge of the second metal foil (3b) is electrically connected to the metal (21) on the peripheral surface of the center rod (2). A method for producing a through-type film capacitor including a side sealing step. 25. A part surrounded by a cylindrical insulator (22), and a peripheral surface excluding said part is formed on a peripheral surface of a center rod (2) made of a metal (21), and an insulating portion is formed on one side edge. A first dielectric film (4a) on which the first electrode layer (6a) on which (7) is formed is laminated, and a second dielectric film (7) on which the other side edge is formed.
The second dielectric film (4) on which the electrode layer (6b) is laminated
b) simultaneously winding a film to form a film cylinder (5), and sealing one surface of the film cylinder (5) with a conductive paste or solder to form the film cylinder (5). The first electrode layer (6
a) electrically connecting one side edge to each other and sealing the other plane of the film cylinder (5) with a conductive paste or solder to form another plane of the film cylinder (5); A side surface that electrically connects the other side edges of the two-electrode layer (6b) to each other and electrically connects the other end edge of the second electrode layer (6b) to the metal on the peripheral surface of the center rod (2). A method for producing a through-type film capacitor including a sealing step. 26. Prior to the film winding step, a part of the peripheral surface of a center rod (2) having a peripheral surface made of metal (21) is covered with an insulator (22) so that a part thereof is formed into a cylinder. 26. The through-type according to claim 25, comprising the step of making an insulatively coated center rod surrounded by a fibrous insulator (22) and forming a center rod (2) whose peripheral surface (21) excluding said part is made of metal. Manufacturing method of film capacitor. 27. The insulator (22) is made of a resin,
The method for manufacturing a feed-through film capacitor according to claim 26, wherein a part of the peripheral surface of the center rod (2) whose peripheral surface is made of metal is coated by applying the resin. 28. The insulator (22) has a peripheral surface formed of a metal (2).
By inserting the center rod (2) consisting of 1)
The method for manufacturing a feed-through type film capacitor according to claim 26, wherein a part of the peripheral surface of the center rod (2) whose peripheral surface is made of metal (21) is coated. 29. By winding an insulating film around the central rod (2) whose peripheral surface is made of metal (21),
The method for manufacturing a feed-through type film capacitor according to claim 26, wherein a part of the peripheral surface of the center rod (2) whose peripheral surface is made of metal (21) is covered with an insulator. 30. Before the film winding step, a longitudinal end of the first dielectric film (4a) is attached to the peripheral surface of the insulator (22) with an adhesive tape (8). 26. The method according to claim 25, further comprising a step of attaching a pressure-sensitive adhesive tape.
3. The method for producing a feedthrough type film capacitor according to item 1. 31. A first structure in which an insulating portion (7) is formed on one side edge.
The first dielectric film (4) on which the electrode layer (6a) is laminated
a) and a second dielectric film (4b) on which a second electrode layer (6b) having an insulating portion (7) formed on the other side edge is simultaneously wound to form a film cylinder having a through hole in the axial direction. (5)
A cylindrical insulator (22) is inserted into the through-hole so that the cylindrical insulator protrudes in an axial direction from only one plane of the film cylinder (5). A covering / shaft inserting step of inserting a center rod (2) whose peripheral surface is made of metal (21) into the insulator (22) and projecting the center rod (2) from both ends of the tubular insulator (22). By sealing one plane of the film cylinder (5) with a conductive paste or solder, one side edge of the first electrode layer (6a) constituting one plane of the film cylinder (5) is electrically connected to each other. The other side of the second electrode layer (6b) that forms the other plane of the film cylinder (5) by sealing the other plane of the film cylinder (5) with a conductive paste or solder. The edges are electrically connected to each other and the second A method for manufacturing a feed-through type film capacitor, comprising a side sealing step of electrically connecting the other end of the electrode layer (6b) to the metal (21) on the peripheral surface of the center rod (2). 32. A first dielectric film (4a) in which a first electrode layer (6a) having an insulating portion (7) formed on one side edge is laminated around a cylindrical insulator (22), and another. A second electrode layer (6b) having an insulating portion (7) formed on a side edge thereof;
A film tube (5) is formed around the cylindrical insulator (22) by simultaneously winding the dielectric film (4b) and projecting the cylindrical insulator (22) from only one plane in the axial direction. A film winding step, a center rod (2) whose peripheral surface is made of metal (21) is inserted into the tubular insulator (22), and the central rod (2) is inserted from both ends of the tubular insulator (22). A first electrode layer (6a) that forms one plane of the film cylinder (5) by projecting a covering / shaft inserting step and sealing one plane of the film cylinder (5) with a conductive paste or solder;
Are electrically connected to each other, and the other surface of the film cylinder (5) is sealed with a conductive paste or solder to form a second electrode constituting the other plane of the film cylinder (5). The other side edges of the layer (6b) are electrically connected to each other, and the other edge of the second electrode layer (6b) is electrically connected to the metal (21) on the peripheral surface of the center rod (2). A method for producing a through-type film capacitor including a side sealing step.