Hermetic electrical feedthrough assembly

Details Hermetic electrical feedthrough assembly Hermetic electrical feedthrough assembly

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.

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