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Direct integration of feedthrough to implantable medical device housing by sintering

  • US 9,610,452 B2
  • Filed: 12/12/2013
  • Issued: 04/04/2017
  • Est. Priority Date: 12/12/2013
  • Status: Active Grant
First Claim
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1. A method of attaching a feedthrough to a titanium housing of an implantable medical device, the method comprising:

  • applying a sinter paste onto a surface of the housing about a perimeter of an opening through the housing, the sinter paste including a biocompatible bonding material;

    placing an insulator of the feedthrough onto the sinter paste so as to cover the opening;

    heating the sinter paste to a temperature less than a beta-transus temperature the titanium of the housing and to a temperature less than a melting point of the biocompatible bonding material for a desired duration to form, from the sinter paste, a sinter joint which bonds the feedthrough directly to the housing, without using a ferrule and without brazing or welding, thereby hermetically sealing the opening, wherein the heating is carried out in an oven having a non-oxygen and non-vacuum environment; and

    metallizing portions of surfaces of the insulator contacting the sinter paste and resulting sinter joint.

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