Specialized metallurgical processes – compositions for use therei – Compositions – Loose particulate mixture containing metal particles
Reexamination Certificate
2004-11-09
2010-10-12
King, Roy (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Compositions
Loose particulate mixture containing metal particles
C075S245000, C361S528000, C428S570000
Reexamination Certificate
active
07811355
ABSTRACT:
The present invention relates to niobium powder for a capacitor, comprising a niobium layer and a mixed layer of silicon nitride and niobium, the mixed layer being present in the vicinity of the powder particle surface; granulated niobium powder thereof; a niobium sintered body using the niobium powder and the granulated powder; and a capacitor using the sintered body as one electrode. The niobium powder for a capacitor of the present invention enables to produce a niobium capacitor having a high capacitance, a low leakage current, a low ESR and good tan δ characteristics and being excellent particularly in the properties of the breakdown voltage and soldering heat resistance.
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Amita Hitoshi
Omori Kazuhiro
King Roy
Mai Ngoclan T
Showa Denko K.K.
Sughrue & Mion, PLLC
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