Solid electrolytic capacitor and manufacturing method therefor
AssigneeMurata Manufacturing Co., Ltd.
InventorsTomoaki Onoue, Hiroshi Tokuhara
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Abstract
A solid electrolyte capacitor in which a valve-acting metal substrate with a dielectric oxide film formed on the surface of an anode body is immersed alternately in a monomer solution and an oxidant solution to form a first conductive polymer layer on the surface of the dielectric oxide film. Thereafter, the capacitor element with the first conductive polymer layer is immersed in a soluble conductive polymer solution or a conductive polymer suspension to form a second conductive polymer layer that varies little in film thickness. Then, a cathode layer is formed on the conductive polymer layer.
Claims9
A solid electrolyte capacitor comprising:
- a valve-acting metal substrate having a dielectric oxide film layer on a surface of a porous anode body having a void section, the valve-acting metal substrate having six surfaces and an extraction electrode section;
- a first conductive polymer layer on a surface of the dielectric oxide film layer and at least partially covering five of the six surfaces of the valve-acting metal substrate, the first conductive polymer layer filling the void section of the valve-acting metal substrate, and having at least two deposited sections different in distance from the extraction electrode section on the surface of the dielectric oxide film layer;
- and
- a second conductive polymer layer on a surface of the first conductive polymer layer.
Dependencies are inferred from the claim text.