Capacitor and production method therefor

Details Capacitor and production method therefor Capacitor and production method therefor

2006-05-23

2006-05-23

Fourson, George (Department: 2823)

Active solid-state devices (e.g., transistors, solid-state diode

Integrated circuit structure with electrically isolated...

Passive components in ics

C257S534000, C257S632000, C257S761000, C257S763000

Reexamination Certificate

active

07049679

ABSTRACT:
A solid electrolytic capacitor is obtained in which a sintered metal serves as an anode and a silver layer serves as a cathode. A surface of sintered metal made of tantalum or the like and having an open porosity ratio of more than 75% is oxidized so that an oxide film made of tantalum pentoxide or the like is deposited thereon. Cavities of the metal are filled with an electrically conductive material. Then, the metal is wound around a lead wire and made into a desired shape and size. The silver layer is formed on this porous metal body. Because a specific surface area of the sintered metal is large, a large capacity is obtained.

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