| 摘要 |
PROBLEM TO BE SOLVED: To reduce the breakdown voltage of a tantalum solid electrolytic chip capacitor and the defective leakage current of the capacitor by a method wherein a spacer, which is installed on the joint of an anode lead-out wire in a porous pellet, is constituted of a porous PTFE, FEP or PEA having an air permeability. SOLUTION: An anode lead-out wire 1 is buried in tantalum metal fine powder and a press-compressed pellet is sintered to form into a porous pellet 2. A spacer 3 is installed on the joint of the wire 1 for preventing a stock solution at the time of formation of a cathode from leaking in the joint of the wire 1 in this pellet 2 more than requires. As the material for this spacer 3, an ethylene tetrafluoride resin, which has a large contact angle to the stock solution at the time of formation of the cathode, has an elasticity and has a plurality of holes of 0.1 to 3μm or thereabouts existing therein, a propylene tetrafluoride- hexafluoride copolyer resin or an etyle tetrafluoride-perfuroloalkyl vinylether copolymer resin is used. Thereby, the stock solution at the time of formation of the cathode can be prevented from creeping up on the wire 1.
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