JP2787626B2 - Manufacturing method of multilayer film capacitor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a multilayer film capacitor, and more particularly to a technique for manufacturing a small-sized capacitor mother element.

[0002]

2. Description of the Related Art As is well known, in the field of film capacitors, as electronic devices are becoming smaller and thinner, it is desired to make them smaller as with other electronic components. It is becoming necessary.

[0003] Under such circumstances, the winding method in the case of manufacturing the mother element of the laminated film capacitor is described in the following. The metallized film used as the internal electrode is placed on the opposite side of the margin (non-deposited portion). A method of winding and laminating a core in two layers so that the metallized film is processed once using a single metallized film so as to have the same margin position as in the case of the above two layers. There is a so-called single-winding method in which the layers are wound and laminated.

In order to manufacture a small laminated film capacitor, it is necessary to use a metallized film having a narrow width corresponding to the width of the film capacitor. In recent years, attention has been paid to the single-winding method because of the fact that it is easy to shift when turning, and it is difficult to set overlapping.

[0005] Generally, as a method of manufacturing a laminated film capacitor in a single-winding system, for example, there is a method shown in FIG. This is because when a single-sided metallized film A is laminated and wound around a cylindrical or flat core a, the position of the margin is opposite to the width direction of the film A every turn as shown in FIG. The non-evaporated portions c are formed by laser light b or the like so as to alternately appear on the side. Note that, as shown in FIG.
Are formed at the same time before or around the core a. And FIG.
0, as shown in FIG.
By applying metallikon to both sides of the substrate and arranging external electrodes, a mother element is formed. Thereafter, the mother element is finely cut to form a unit capacitor as shown in FIG.

As described above, the non-deposition portion c is irradiated with the laser beam b.
Is formed, a plurality of non-evaporated portions c can be simultaneously formed at a time. Therefore, conventionally, as shown in FIG. In general, a method of arranging a plurality of pieces in parallel with the width direction and simultaneously starting and stopping the irradiation at the same time is performed.

[0007]

As described above, in order to arrange the irradiating means g so as to be parallel to the width direction of the metallized film A, the film width is sufficiently larger than the lateral width occupied by the irradiating means g. In some cases it is certainly possible. However, as recently, the film width has to be extremely narrow in order to cope with miniaturization of the element.
However, at present, the irradiation means g, especially the condensing lens close to the film cannot be made small, and if the condensing lens groups are arranged side by side, a space larger than the film width is required. Therefore, it was extremely difficult to form a plurality of non-evaporated portions c.

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and has an advantage that a plurality of margins are formed efficiently and continuously at a narrow interval without being cut off in the middle thereof, which is effective for manufacturing a small-sized laminated film capacitor. It aims to provide technology.

[0009]

In order to achieve the above object, the present invention provides a method for forming a non-deposited portion on a continuous deposited metal layer on a single-sided metallized film by means of irradiating electricity or light energy. A method of manufacturing a laminated film capacitor in which the metallized films are overlapped by a winding means so that margins are alternately arranged on opposite sides, wherein the irradiation means comprises a plurality of irradiation means along the metallized film. The irradiation means were set obliquely with an interval of, and each irradiation means was set to be movable in the lateral direction.

[0010]

When the irradiating means is operated, the irradiation is started from the leading irradiating means on the front side with respect to the direction in which the metallized film is moved, and when the non-deposited portion formed by this irradiation reaches the position of the next irradiating means, The next irradiation means also starts irradiation and sequentially forms a non-deposited portion.

After the non-evaporated portion is formed by each irradiation means from the first irradiation means to the last irradiation means, the non-evaporated portion is moved from the first irradiation means in a horizontal or oblique direction, and the above steps are repeated again.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 schematically shows an example of an element forming system used in the manufacturing method of the present invention.
The element forming system 1 includes a margin forming device 2, a winding device 3, and a margin pitch measuring device 4.

The margin forming device 2 includes a rotating drum 5 that continuously hangs the metallized film A and sends it to the winding device 3, and a laser condensing lens group (hereinafter referred to as a laser condensing lens group) along the outer periphery of the rotating drum 5. , A condenser lens group) 6 is provided. This laser light irradiation device includes a laser oscillator (not shown) and the condenser lens group (irradiation means) 6 and the like, and is configured to be capable of irradiating a YAG laser.

As shown in FIG. 2, the condensing lens group 6 is provided with a required number of condensing lenses for forming a margin obliquely along a longitudinal direction on the metallized film A at predetermined intervals. I have. The distance between the condenser lens group 6 and the film surface is adjusted by the focal length of the lens. Also,
The condensing lens group 6 has a mechanism for shifting in the width direction of the film surface. The operation thereof corresponds to the rotation angle of the winding core 8, for example, the non-deposition portion 9 is formed in accordance with the length of one rotation. It moves sideways every time. In this way, by synchronizing the timing of the movement with the rotation angle of the winding core 8, the film can be formed so that the margins are alternately opposite on both sides of the film.

The winding device 3 is provided with a plate-shaped winding core 8, whereby the metallized film A passing through the margin forming device 2 and the margin pitch measuring device 4 is provided.
Can be continuously wound and laminated.

The margin pitch measuring device 4 is installed between the margin forming device 2 and the winding device 3. Then, each pitch dimension of the non-evaporated portion 9 formed by the condenser lens group 6, that is, the dimension from the reference surface (one end) of the film to the edge of each non-evaporated portion 9 is constantly read and set. The condenser lens can be finely moved and adjusted until the edge of each non-deposition section 9 coincides with the optical base line. Further, the margin pitch measuring device 4 is configured so that the length of each non-evaporated portion 9 can be adjusted.

The element forming system 1 thus constructed
The operation of the margin forming apparatus 2 will be described with reference to FIGS.

First, in a process before forming a mother element,
When the single-sided metallized film A is sequentially passed over the rotating drum 5, the condenser lens group 6 (here, three units are provided for easy explanation), Laser light 1 from lens (head irradiation means) 10
Irradiation 3 starts. Meanwhile, the other condenser lenses 11 and 12
Do not irradiate. Then, as shown in FIG. 3, when the non-evaporated portion 9 formed by the first irradiation reaches the position of the next condenser lens 11, the condenser lens 1 is immediately turned on.
The laser light 13 is irradiated from 1 on. Further, the non-evaporation section 9
Is formed, and as shown in FIG.
Irradiation. At the same time or almost simultaneously with the start of irradiation of the rearmost condenser lens 12, the leading condenser lens 10 is shifted laterally or obliquely (indicated by a broken line in the figure). In the meantime, the other condenser lenses 11 and 12 are continuously irradiating in the same state, and then the other condenser lenses are sequentially shifted in the same horizontal direction (see FIGS. 5 to 7).

As shown in FIG. 1, the metallized film A on which the non-evaporated portion 9 is formed is continuously wound by the winding core 8 of the winding device 3 in the next step, and is turned for one turn. The film laminate 7 can be formed such that the margins are alternately provided every time. Then, by applying metallikon to the winding side of the film laminate 7, a mother element can be formed. If the mother element is cut finely, a laminated unit capacitor is basically obtained.

<Embodiment 2> In the first embodiment, when the head condenser lens 10 is moved laterally, the rearmost condenser lens 12 is moved simultaneously with the start of irradiation. When the core 8 having a length dimension longer than the irradiation range of the group 6 is used, for example, if the core 8 having a length twice as long is used, even if the last condenser lens 12 starts irradiation,
The top condenser lens 10 does not immediately move, but starts moving when it reaches a length substantially equal to the length of the core 8. With this setting, the irradiation area of the condenser lens group 6 is
No matter how long the length is. In the above-described embodiment, the condenser lens group 6 is arranged so that the metallized film A is irradiated with the laser beam 13 on the rotating drum 5, but the metallized film A is placed on a plane, The laser beam 13 may be emitted from the condenser lens group 6 from above. The irradiation means is not limited to the laser beam 13 but may be electric energy, and various design changes are possible within the scope of the technical idea described in the claims.

[0022]

As described above, according to the method for manufacturing a laminated film capacitor of the present invention, a plurality of means for irradiating electricity or light energy are obliquely arranged on one continuous single-sided metallized film, and irradiation is performed. Sometimes irradiation is performed from the front irradiation means on the front side with respect to the direction in which the metallized film advances, and when the non-evaporated portion formed by this reaches the next irradiation means, the next irradiation means also starts irradiation and irradiates sequentially. At the same time, the irradiation means is set to shift laterally according to the rotation angle of the core, so even if the film width is narrower than the size of the condenser lens group, it is not vapor-deposited. Parts can be formed. Further, since the condenser lens groups are arranged obliquely, the interval between the non-evaporated portions can be reduced as much as possible. Furthermore, by sequentially shifting the condenser lens group side by side in order to change the position of the non-evaporated part,
Since the metallized films are overlapped by the winding means so that the margins are alternately arranged on opposite sides, therefore, a film laminate similar to the case where two sheets are wound can be formed and cut off halfway. There is an advantage that a small-sized multilayer film capacitor can be manufactured efficiently and continuously without using the same.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of an element forming system used in a manufacturing method of the present invention.

FIG. 2 is a plan view showing a state where a non-evaporated portion is formed on the single-sided metallized film by irradiation means.

FIG. 3 is an enlarged perspective view showing a process in which a non-evaporation section is formed with the operation of the irradiation unit.

FIG. 4 is an enlarged perspective view showing a process of forming a non-evaporated portion with the operation of the irradiation unit.

FIG. 5 is an enlarged perspective view showing a process in which a non-evaporation section is formed with the operation of the irradiation unit.

FIG. 6 is an enlarged perspective view showing a process of forming a non-evaporated portion with the operation of the irradiation unit.

FIG. 7 is an enlarged perspective view showing a process of forming a non-evaporated portion with the operation of the irradiation unit.

FIG. 8 is a perspective view showing a method for manufacturing a laminated film capacitor by a conventional single-sheet winding method.

FIG. 9 is a partially cutaway perspective view showing a state where non-evaporated portions are alternately formed on both sides of the metallized film.

FIG. 10 is a side view showing a state where a metallized film is wound and laminated on a winding core in a single-sheet winding system to form a film laminate.

FIG. 11 is a perspective view showing an external shape of a laminated film capacitor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Element formation system 2 ... Margin forming apparatus 3 ... Winding apparatus 4 ... Margin pitch measuring apparatus 5 ... Rotating drum 6 ... Laser condensing lens group 7 ... Film lamination Body 8: Core 9: Non-evaporated part 10: First condenser lens 11: Next condenser lens 12: Last condenser lens 13: Laser light

Claims (2)

(57) [Claims] 1. A non-deposited portion is formed on a continuous metallized metal layer on a single-sided metallized film by means of irradiation of electricity or light energy, and the metallized film is superposed by a winding means. A method of manufacturing a laminated film capacitor in which margins are alternately arranged on opposite sides, wherein the irradiation unit is disposed at a predetermined interval diagonally along the metallized film, and at the time of irradiation, Start irradiation from the front irradiation means on the near side with respect to the direction in which the metallized film advances,
When the non-deposited portion formed by the irradiation reaches the position of the next irradiating means, the next irradiating means also starts irradiating and sequentially forms the non-deposited portion, whereby a method for manufacturing a laminated film capacitor is provided. 2. A non-evaporated portion is formed by each of the irradiation means from the top irradiation means to the last irradiation means, and then moved in a horizontal or oblique direction from the top irradiation means, and the above steps are repeated again. 2. A structure according to claim 1, wherein
Manufacturing method of the laminated film capacitor described above.