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1. (WO1998050929) PROCESS FOR MANUFACTURING A SOLID ELECTROLYTIC CAPACITOR

Pub. No.:    WO/1998/050929    International Application No.:    PCT/GB1998/001263
Publication Date: Fri Nov 13 00:59:59 CET 1998 International Filing Date: Fri May 01 01:59:59 CEST 1998
IPC: H01G 9/00
Applicants: AVX LIMITED
HARRIS, Peter
MILLMAN, William
Inventors: HARRIS, Peter
MILLMAN, William
Title: PROCESS FOR MANUFACTURING A SOLID ELECTROLYTIC CAPACITOR
Abstract:
This application concerns methods of manufacturing capacitors, and in particular solid state electrolytic capacitors, such as those made from porous tantalum. According to the present invention, there is provided a method of manufacturing one or more solid state electrolytic capacitors comprising: (i) forming an anode comprising a porous sintered anode body with a riser wire protruding therefrom, (ii) forming a dielectric layer on the anode body, (iii) applying a resist layer to a portion of the riser wire to be kept clear of a cathode layer material, (iv) forming a cathode layer on the anode body by a method including immersion of the anode body into a cathode-layer-forming solution, (v) causing the resist layer to become detached thereby to remove unwanted cathode material contamination from the riser wire. In this way any splashed cathode precursor solution is removed along with the resist layer, the resist layer acting to protect the riser wire in the region where contamination is sought to be prevented.