Showa Denko K.k.

Ryuichi Mitsumoto

Kazumi Naito

Akihiko Shirakawa

Koji Tokita

When forming a conductive polymer layer serving as a cathode of a solid electrolytic capacitor, in order to obtain a high capacitance even with a small number of times of polymerization treatments, a capacitor anode according to the present invention includes a tungsten sintered body () and is provided with a dielectric film (), and in which vanadium oxide is deposited on the surface of the dielectric film ().

Capacitor anode, solid electrolytic capacitor element, solid electrolytic capacitor, and method for producing capacitor anode

An anode body for an electrolytic capacitor, prepared by sintering a tungsten powder to obtain a sintered body and subjecting the obtained sintered body to chemical conversion to form a dielectric layer comprising a tungsten trioxide compound on the surface of the sintered body, wherein the ratio of the hydration water in the tungsten trioxide compound becomes one molecule or less to 10 molecules of the tungsten trioxide compound. Use of the anode body of the present invention enables production of a tungsten capacitor, which is reduced in the capacitance change due to DC voltage (bias dependency).

Anode body for tungsten capacitors

The capacitor material of the present invention is comprised by laminating a titanium dioxide layer and a titanate compound layer having perovskite crystals.

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Tokyo, Japan

Ryuichi Mitsumoto