Process for making a lead- or ribbonless solid electrolyte tantalum capacitor, apparatus adapted to this process and capacitor obtained

摘要

1. A process for manufacturing a tantalum capacitor having a solid electrolyte, of the kind without wire or outlet ribbon, comprising making a porous tantalum body (2) extended on one face (3) by a tantalum wire (6), forming a dielectric layer (7) covering the body and the wire, depositing a solid electrolyte layer (9) on the body and on a part of the wire, depositing a counter electrode layer (10) on a part of this solid electrolyte layer, coating the assembly with a sleeve (11) of electrically insulating material whilst leaving a portion of the counter electrode bare, and then depositing terminal conductive layers (12-13; 14-15; 32, 34; 36-33; 35, 37) insulated from one another and in contact with the wire (6) and the counter electrode (10) respectively, characterized in that, before the deposition of the terminal layers, the said sleeve (11) is formed by moulding in such a way that it masks the said portion of the counter electrode (10) so as to prevent it being coated.