Nano-Titanium For Making Medical Implantable Hermetic Feedthrough Assemblies

A feedthrough assembly, which comprises:

• a) an insulator of electrically non-conductive material having a height defined by an insulator sidewall extending to a first insulator end and a second insulator end, wherein the insulator has at least one terminal pin bore extending from the first end to the second end thereof;
• b) a terminal pin received in the terminal pin bore, the terminal pin having a sidewall extending to opposed first and second ends disposed spaced from the respective first and second insulator ends;
• c) a ferrule of an electrically conductive material and comprising a ferrule opening defined by a surrounding sidewall extending to a first ferrule end and a second ferrule end, wherein the insulator is supported in the ferrule opening;
• d) a first braze material hermetically sealing the terminal pin to the insulator and a second braze material hermetically sealing the insulator to the ferrule;
• and
• e) wherein the ferrule is of titanium having a grain size prior to brazing of less than about 1 μm.