JPH0232776B2 - SEKISOGATAFUIRUMUKONDENSANOSEIZOHOHO - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for manufacturing a multilayer film capacitor. In general, the manufacturing method of a multilayer film capacitor is as shown in Fig. 1, in which a pair of metallized films are laminated and wound multiple times around a large-diameter winding core 1 constituting a winding machine (not shown). is formed to form a mother element 3, and as shown in FIG. 2, the mother element 3 is cut in the radial direction with, for example, a hacksaw 4 to obtain unit elements 5. As a result, insulation resistance and capacitance characteristics deteriorate due to thermal melting on the cut surface, scratches due to mechanical stress, etc., and loss increases due to stress on the connection between the metallized electrode and the metallized film. A combination of these conditions led to a drop in breakdown voltage, which naturally resulted in poor reliability. The present invention has been made in view of the above points, and uses a comb-shaped single-sided metallized film consisting of a plurality of vapor-deposited metal parts connected at margin parts, with the margin parts alternately placed on opposite sides, and the vapor-deposited metal parts connected to the margin parts. Deterioration of characteristics can be prevented by stacking a plurality of metal electrodes so as to protrude from the end faces, forming metallicon electrodes on each end face protruding from the end face of the margin part of the vapor-deposited metal part, and then cutting the stacked margin part. It is an object of the present invention to provide a method for manufacturing a multilayer film capacitor that can obtain a multilayer film capacitor with high reliability. An embodiment of the present invention will be described below. That is, the metallized film used in the present invention has a plurality of vapor-deposited metal parts 1 in the margin part 11 as shown in FIG.
It consists of a comb-shaped single-sided metallized film 13 in which 2 are connected. Next, as shown in FIG.
They are stacked so that they are alternately on opposite sides, and then heated and pressurized to form a stacked element group 16 consisting of a plurality of unit stacked elements 15 connected at stacked margins 14. In this case, as a stacking means, for example, as shown in FIG. 5, a plurality of pairs of margin alignment stoppers 17a and 17b are provided facing each other on both end faces in the width direction at regular intervals in the length direction, and the margins are stacked. Part alignment stopper 17
Using a lamination jig 19 having a vapor deposited metal part alignment stopper 18 provided between a and 17b, the vapor deposited metal part 12 of the comb-shaped single-sided metallized film 13 is placed between the vapor deposited metal part alignment stoppers 18 and stacked. By doing so, stacking accuracy can be easily obtained. Metallic electrodes 2 are formed on both end surfaces of the unit laminated elements 15 constituting the laminated element group 16.
0a, 20b, and then, as shown in FIG.
The dotted line portion 4 is cut and subjected to voltage treatment to obtain one multilayer film capacitor as shown in FIG. According to the manufacturing method of the multilayer film capacitor constructed as described above, since the cut portion after stacking and laminating is only the margin portion 11, there is an excellent effect that the vapor-deposited metal portion 12 is not damaged by cutting. has. In the above embodiments, the comb-shaped single-sided metallized film was explained on the assumption that a comb-shaped raw film in which vapor-deposited metal was formed on the necessary parts was used as the comb-shaped single-sided metalized film, but as shown in FIG. Using a single-sided metallized film 23 on which a vapor-deposited metal part 22 is formed leaving margins 21a and 21b, the single-sided metalized film 23 is cut so as to be connected at the margin parts 21a and 21b, respectively, as shown in FIG. metallized film 24a,
The method of obtaining 24b is more efficient than the method of individually obtaining comb-shaped single-sided metallized films by performing vapor deposition on raw films that have been formed into comb shapes in advance, and can greatly contribute to improved workability. Furthermore, in the above embodiment, an example in which an insulating film is not used on the upper and lower surfaces of the laminated element was explained, but if an insulating film layer is provided as necessary, the effect of protecting the laminated element will be even better. ,
If a high melting point film such as epoxy or polysulfon is used, it is possible to protect the laminated element from the temperature caused by fluorescing when used in a hybrid IC. Next, the effects of the present invention will be clarified based on experimental results. That is, the table shows a comparison of characteristics between the present invention (A) and the conventional example (B) explained with reference to FIGS. 1 and 2. The metallized film used in both (A) and (B) is 6μ polyethylene terephthalate film, and the rating is (A).
Both (B) are 200V.DC-0.01μF, and the cutting means in both (A) and (B) is a hacksaw. In addition, a melamine sheet was used as the protective film for both (A) and (B). There are 10 samples each for (A) and (B).

【table】

[Table] As is clear from the above table, the present invention (A) is superior to the conventional example (B) in all characteristics with less variation as well as absolute values. As described above, according to the present invention, a comb-shaped single-sided metallized film consisting of a plurality of vapor-deposited metal parts connected by margin parts is used, and the margin parts are alternately turned to opposite sides so that the vapor-deposited metal parts protrude from the end face of the margin part. By stacking a plurality of films in this way, forming metallicon electrodes on both end faces protruding from the end faces of the margin parts of the vapor-deposited metal parts, and then cutting the stacked margin parts, a multilayer film with high practical value can be obtained. A method for manufacturing a capacitor can be provided.

[Brief explanation of drawings]

1 and 2 are schematic diagrams illustrating a conventional manufacturing method, and FIGS. 3 to 7 relate to an embodiment of the present invention, and FIG. 3 is a plan view of a comb-shaped single-sided metallized film. The figure is a perspective view showing a stacked element group formed by laminating the metallized films shown in Figure 3, Figure 5 is a perspective view showing a lamination jig, and Figure 6 shows a stacked element group with cut points indicated. A perspective view, FIG. 7 is a perspective view showing the multilayer film capacitor after cutting, and FIG.
9 to 9 relate to other embodiments, FIG. 8 is a plan view showing the metallized film before cutting, and FIG. 9 shows a comb-shaped single-sided metallized film formed by cutting the metallized film shown in FIG. 8. FIG. 11, 21a, 21b...margin part, 12,
22... Vapor deposited metal part, 13, 24a, 24b...
Comb-shaped single-sided metallized film, 14... stacking margin section, 15... unit laminated element, 16... laminated element group, 20a, 20b... metallicon electrode.

Claims (1)

[Claims] 1 Using a plurality of comb-shaped single-sided metallized films consisting of a plurality of vapor-deposited metal parts connected at margin parts, the margin parts are alternately turned to opposite sides, and the vapor-deposited metal parts are stacked and stacked so as to protrude from the end face of the margin part to form a stacked margin part. A stacked element group consisting of a plurality of unit stacked elements connected together is formed, then a metallicon electrode is formed on the end face of the vapor deposited metal part protruding from the end face of the stacked margin part, and then a stacked margin part between the unit stacked elements is formed. A method for manufacturing a multilayer film capacitor, which includes cutting.