Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Reexamination Certificate
2004-04-21
2009-02-03
King, Roy (Department: 1793)
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
C419S056000
Reexamination Certificate
active
07485256
ABSTRACT:
Methods of forming sintered valve metal are described. The methods involve sintering a valve metal such as tantalum or niobium in the presence of an iodine source. The method optionally includes deoxidizing the metal using the same equipment used in sintering and/or as a combined step. The sintered valve metal formed by the methods of the present invention preferably has relatively large pores and other properties desirable for making capacitors that have high capacitance and low leakage.
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Cabot Corporation
King Roy
Mai Ngoclan T
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