Kemet Electronics Corporation

James L Piller

Philip Michael Lessner

Randolph Stephen Hahn

Christian L Guerrero

Kimberly Lynn Pritchard

Carole C Eppes

An improved solid electrolytic capacitor, and method of making the solid electrolytic capacitor, is described. The solid electrolytic capacitor comprises a pressed powder anode and a braided lead wire extending from the anode. A dielectric is on the anode and a cathode is on the dielectric.

Anode lead wires for improved solid electrolytic capacitors

A solid electrolytic capacitor with improved ESR before and after mounting on a circuit board is obtained by forming a cathode on a dielectric layer using a conductive polymer, especially an intrinsically conductive polymer. The polymer is then coated with graphetized carbon by dipping in a suspension thereof. After drying, the carbon is infused and coated at least once with a second conductive polymer layer before a conductive paint such as &ldquo;dipping silver&rdquo; is applied and the capacitor encapsulated by a transfer molding process. The application of a second conductive polymer layer improves the ESR by filling voids in the carbon layer and improves adhesion of the carbon.

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Simpsonville, SC, United States of America

James L Piller