Methods to make capacitors containing a partially reduced niobium metal oxide
AssigneeCabot Corporation
InventorJames A. Fife
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Abstract
Methods to at least partially reduce a niobium oxide are described wherein the process includes heat treating the niobium oxide in the presence of a getter material and in an atmosphere which permits the transfer of oxygen atoms from the niobium oxide to the getter material, and for a sufficient time and at a sufficient temperature to form an oxygen reduced niobium oxide. Niobium oxides and/or suboxides are also described as well as capacitors containing anodes made by fabricating a pellet of niobium oxide and heat treating the pellet in an atmosphere which permits the transfer of oxygen to a getter material, and for a sufficient time and temperature to form an electrode body, and anodizing the electrode body.
Claims15
A method of making a capacitor anode comprising a) fabricating a pellet of niobium oxide and heat treating the pellet in the presence of a niobium flaked getter material or magnesium containing getter material, and in an atmosphere which permits the transfer of oxygen atoms from the niobium oxide to the niobium flaked getter material or magnesium containing getter material, and for a sufficient time and temperature to form an electrode body comprising the pellet, wherein the pellet comprises an oxygen reduced niobium oxide, and b) anodizing said electrode body to form said capacitor anode.
Dependencies are inferred from the claim text.