Welded feedthrough
AssigneeHeraeus Deutschland GmbH & Co. KG
InventorsJacob Markham, Ulrich Hausch, Goran Pavlovic
Life of this patent
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Abstract
One aspect is a feedthrough for a medical implantable device including a ferrule having a metal that is configured to be welded to a case of the implantable device. The ferrule substantially surrounds an insulator and shares an interface therewith, the insulator having a glass or ceramic material. Conductive elements are formed through the insulator providing an electrically conductive path through the insulator. There is no braze or solder at the interface between the ferrule and the insulator and that there is no braze or solder adjacent the conductive elements.
Claims6
A feedthrough for a medical implantable device comprising:
- a ferrule comprising a metal that is configured to be welded to a case of the implantable device;
- an insulator at least partially surrounded by the ferrule and sharing an interface therewith,
- the insulator comprising a glass or ceramic material that is characterized by the absence of any material that will flow when heated to a temperature between 1,300 and 1,600 degrees C. at the interface between the insulator and case;
- conductive elements formed through the insulator providing an electrically conductive path through the insulator;
- characterized in that there is no braze or solder at the interface between the ferrule and the insulator and that there is no braze or solder adjacent the conductive elements;
- and
- wherein the ferrule is configured with an inner edge that is tapered and the insulator is configured with an outer edge that is tapered to match the inner edge of the ferule,
- the taper of each at an angle of 5 to 15 degrees relative to a line running perpendicular to a top surface of the feedthrough.
Dependencies are inferred from the claim text.