EXTERNAL ELECTRODE FORMING METHOD OF TANTALUM CAPACITOR

摘要

<P>PROBLEM TO BE SOLVED: To provide a plating method for forming an external electrode of a tantalum capacitor. Ž<P>SOLUTION: An external electrode forming method of a tantalum capacitor includes: a step of performing preprocessing using a fluoride on a surface of a molding material of the tantalum capacitor; a step of performing primary catalyst processing on an end part-side surface of an anode wire exposed to the surface of the molding material by a catalyst processing liquid containing palladium; a step of performing secondary catalyst processing on the surface of the molding material around the end part of the anode wire by a catalyst processing liquid containing palladium; and a step of providing a nickel plating film on surfaces of the anode wire and the molding material. This method has advantages of satisfactorily maintaining electric characteristics of a capacitor element and of allowing the increase in volume efficiency of the capacitor element for ensuring an electrostatic capacity of the tantalum capacitor. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž