H - Electricity – 01 – B
Patent
H - Electricity
01
B
337/98
H01B 17/30 (2006.01) A61N 1/375 (2006.01) C03C 27/04 (2006.01) H01M 2/06 (2006.01)
Patent
CA 1143024
ABSTRACT OF THE DISCLOSURE Disclosed is a hermetic electrical feedthrough consisting of a niobium electrical lead-in wire surrounded by a sapphire insulator which is carried by a niobium ferrule or the like. The lead-wire is brazed to the insulator and the insulator to the ferrule. The braze composition is se- lected from the group consisting of substantially pure gold and an alloy of gold, vanadium, yttrium and/or scandium. The optical transparency of the sapphire allows visual inspection of the sapphire-to-niobium bond for the presence of defects. The feedthrough is particularly adapted for use in encapsulated electrical devices for human implant.
344568
Kraska Robert E.
Lessar Joseph F.
Wilary Frank J.
Medtronic Inc.
Smart & Biggar
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