JPS6050915A - Method of producing laminated solid electrolytic condenser - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a nonpolar multilayer solid electrolytic capacitor manufactured by laminating a plurality of comb-shaped electrode foils.

Conventional non-polar electrolytic capacitors were constructed by creating an anode and cathode missing for each element, such as an aluminum electrolytic capacitor element or a Kuntal solid electrolytic capacitor element, and connecting the cathodes with each other. Alternatively, only one electrode was connected to the other side within the case, but this had the problem of requiring an element with twice the required capacity, resulting in a large size.

There is also a method of constructing a non-polar electrolytic capacitor by winding two pieces of aluminum electrolytic anode foil with a spacer interposed and providing a lead-out terminal from each electrode foil, but this involves winding two pieces of expensive anode foil. The drawer terminals had to be connected to the anode and cathode foils and special care was required to draw out the drawers, resulting in large size and high price.

The present invention has been made in view of the above points, and provides a method for manufacturing a non-polar multilayer solid electrolytic capacitor that is small, thin, and inexpensive, and is an aluminum tank. This will be explained below using examples. As shown in Figures 1 and 2, Q, 1
After roughening the surface of aluminum foil (1) with a thickness of m by known means, a chemical conversion treatment is performed to form an oxide film (2), and the aluminum foil is punched into a comb shape to form a base (3) and a plurality of teeth (4). )
A comb-shaped electrode foil is provided. Alternatively, the chemical conversion treatment 7 may be performed by punching out a comb shape after the rough surface is finished. An insulating coating film (5) is formed by applying a heat-resistant insulating coating such as silicone, polyamide, or fluorine-based resin so as to extend slightly from the base (3) of the comb-shaped electrode foil to the roots of the teeth (4). After being immersed in a manganese nitrate solution, it is pulled up and fired for 7 minutes at 2500°C to form a semiconductor layer such as a manganese dioxide layer (6). It catches fire. The desired manganese dioxide layer (6) is removed by repeating immersion in the manganese nitrate solution, calcination, and reconversion several times. In this way, the carbon dioxide layer (6
)) Dip the teeth (4) of the comb-shaped electrode foil produced into a carbon blank or carbon graphite suspension to eliminate carbon adhesion. In this state, the comb-shaped electrode foil is formed.As shown in FIG.
5) Laminate the teeth (4) alternately so that the coated parts overlap and the bases (3) face each other, and then dry and bake to form the carbon layer (7). At the same time, the laminated insulating coating film (5) or the coating film on the insulating coating film (5) is bonded and integrated.

Conductive paint is applied to both ends of each base portion (3) of the laminated comb-shaped electrode foil separated by the insulating coating film (5) to form lead terminal electrode portions +81 to +91. In this way, one or both opposing bases (
3) Cut along the width of the missing tooth (4) to form a missing common terminal (10) on one base (4) and a terminal (11) on each of the other cut pieces as shown in Figure 4, Alternatively, as shown in FIG. 5, it is possible to obtain a nonpolar multilayer solid electrolytic capacitor having a structure in which terminals (20) are formed by cutting along the width of both the base (3) and the missing teeth (4).

Since the present invention is constructed as described above, it is possible to easily obtain a plurality of capacitors by laminating them by making the electrodes interdigitated, and the insulating coating (5) is provided on the base (3).
) is not provided, and the insulating coating (5) is laminated and bonded in a fire-like manner, so that carbon does not enter the lead terminal electrode part (8) +91, and the laminated part of the tooth (4) forming the capacitor. It is completely separated from the lead-out terminal electrode portion t81(9) and no insulation defects occur. In addition, since methods such as winding are not used as a means of constructing the element, the stress caused by winding is 2.
Therefore, it is possible to obtain a capacitor with stable characteristics without damage to the oxide film. Furthermore, since the capacitor configured as shown in Figure 5 can be used as a non-polar chip capacitor, there is no need to check the polarity when mounting it on the board, so the loading process can be carried out more efficiently. In the above description, valve metals such as tantalum, niobium, and titanium may be used, and instead of the manganese dioxide layer, organic semiconductors such as N-normalprobylquinoline-TCNQ salt and N-inoprobylquinoline may be used. -TCNQ salt, ) Chirki/
IJ y-T CNQ salt, ethylquinoly-TCNQ
salt, 'r:T, F-T CNQ salt, etc. may also be used.

[Brief explanation of drawings]

The drawings all show embodiments of the present invention; Fig. 1 is a side sectional view of the aluminum foil, Fig. 2 is a plan view of the aluminum foil, and Fig. 3 is a plan view of the aluminum foil.
The figure shows a side sectional view of laminated aluminum foil, Figure 4 is a perspective view of a laminated solid electrolytic capacitor with one base cut off, and Figure 5 shows a laminated solid electrolytic capacitor with both bases cut off. FIG. 7 is a perspective view showing another embodiment of the invention. (1)...Aluminum foil (2)...Oxide film (3)...Base (4)...Teeth (5)...
...Insulating coating film (6) ...Manganese dioxide layer
(7)...Carbon layer (81 (91...Output terminal electrode part (10)...Common terminal (11) (20)...Terminal patent applicant Marcon Electronics Kunimi Electronics Co., Ltd.

Claims (3)

[Claims] (1) A step of forming an insulating coating film on both sides of the bases and roots of the teeth of a plurality of comb-shaped electrode foils, a step of forming a semiconductor layer on the teeth of the comb-shaped electrode foils, and a step of forming a semiconductor layer on the semiconductor layer with carbon black or a step of applying a carbon graphite suspension, and a step of laminating the comb-shaped electrode foils alternately so that the insulating coating films overlap each other and the bases thereof face each other, and then attaching the insulating coating films to each other. A method for manufacturing a multilayer solid electrolytic capacitor, comprising the steps of: forming lead terminal electrodes on both ends of the base; and cutting the base to a tooth width. (2) The method for manufacturing a multilayer solid electrolytic capacitor according to claim (1), wherein the insulating coating film is formed by further forming a missing coating on the insulating coating film. (3) A method for manufacturing a multilayer solid electrolytic capacitor according to claim 1 or claim 21, characterized in that the method is carried out by heating the insulating coating film in a non-adhesive manner. A method for manufacturing a laminated solid electrolytic content according to any one of claims (1) to (3), characterized in that both bases are cut off.