Doped sintered tantalum pellets with nitrogen in a capacitor

Details Doped sintered tantalum pellets with nitrogen in a capacitor Doped sintered tantalum pellets with nitrogen in a capacitor

1997-01-29

1998-10-20

Ledynh, Bot L.

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

361529, 361540, H01G 406

Patent

active

058256113

ABSTRACT:
Doped tantalum pellets with nitrogen is described wherein the resulting pellets are substantially free of nitride precipitate on their outer surfaces. The tantalum pellets are formed by heating the pellets to a temperature of from about 1000.degree.-1400.degree. C. in a nitrogen gas atmosphere and then in a vacuum which causes nitrogen contacting a tantalum pellet to diffuse into the inner portion of the pellet instead of forming a precipitate. The resulting pellets have improved DCL stability and reliability in comparison to prior art nitrogen-doped tantalum pellets.

REFERENCES:
patent: 3789274 (1974-01-01), Pfister et al.
patent: 4164455 (1979-08-01), Aronson et al.
patent: 5622746 (1997-04-01), Hahn et al.

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