Solid electrolytic capacitor and method for production thereof
A technology of solid electrolysis and solid electrolyte layer, applied in the direction of solid electrolytic capacitors, electrolytic capacitors, capacitors, etc., can solve the problems of increasing the number of processes, increasing the number of conductive powders, and increasing the size of capacitors.
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no. 1 approach
[0024] Such as figure 1 As shown, the solid electrolytic capacitor of the first embodiment has a capacitive element 8 in which a dielectric coating 2 and a solid electrolyte layer are sequentially formed on an anode body 1 made of a valve metal in which an anode lead 10 is implanted. 3. The first cathode extraction layer 4 and the second cathode extraction layer 5 . In addition, the anode lead 10 is connected to the anode lead frame 20 , and the second cathode lead-out layer 5 is connected to the cathode lead frame 21 . Furthermore, the surroundings of the capacitive element 8 are coated with an exterior resin, and the ends of the anode lead frame 20 and the cathode lead frame 21 are drawn out to the outside. As described above, the solid electrolytic capacitor of the first embodiment is configured. In addition, the cathode extraction layer formed on the solid electrolyte layer 3 may have a single-layer structure instead of a laminated structure of the first cathode extracti...
no. 2 approach
[0037] Such as image 3 As shown, the solid electrolyte layer 3 in the solid electrolytic capacitor of the second embodiment has: an electrolytically polymerized conductive polymer layer 31 containing an electrolytically polymerized conductive polymer (first electrolytically polymerized conductive polymer); A conductive polymer mixed layer 32 of a conductive polymer (second electrolytically polymerized conductive polymer) and a chemically polymerized conductive polymer. Specifically, the solid electrolyte layer 3 is composed of the conductive precoat layer 30 formed on the dielectric coating 2, the above-mentioned electrolytically polymerized conductive polymer layer 31 formed on the conductive precoat layer 30, and the electrolytically polymerized conductive polymer layer 31 formed on the electrolytically polymerized layer. The above-mentioned conductive polymer mixed layer 32 in contact with the first cathode lead-out layer 4 on the conductive polymer layer 31 is constituted...
Embodiment 1-1
[0053] An anode body element 1A was produced in which a dielectric coating 2 was formed on the peripheral surface of a sintered body (anode body) 1 having an anode lead 10 , and a conductive precoat layer 30 was formed on the dielectric coating 2 . Then, in containing pyrrole (0.018mol / l) as monomer, containing alkyl naphthalenesulfonic acid (alkyl naphthalenesulfonic acid) salt (0.004mol / l) as supporting electrolyte, and ferrous sulfate (generates 2.5×10 -5 The anode body element 1A was impregnated in the electrolytic polymerization solution (10 L) of the amount of ferrous ions electrolytically oxidized in mol / l. Then, conduct electricity between the anode element 1A and the cathode plate in the electrolytic polymerization solution, and form a mixture of electrolytically polymerized conductive polymers and chemically polymerized conductive polymers on the conductive precoat 30 of the anode element 1A. The conductive polymer mixed layer 32. Solid electrolyte layer 3 was forme...
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