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Implantable medical device having shielded and filtered feedthrough assembly and methods for making such assembly

  • US 5,683,435 A
  • Filed: 11/13/1996
  • Issued: 11/04/1997
  • Est. Priority Date: 11/13/1995
  • Status: Expired due to Term
First Claim
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1. A method of electrical connection to electronic circuits inside a hermetically sealed housing of an implantable medical device to connector blocks of a connector assembly disposed outside of the hermetically sealed housing, the method comprising the steps of:

  • forming a hollow weld ring dimensioned to be received in an aperture of a wall of the hermetically sealed housing;

    forming a multilayered structure of insulating layers with printed conductors therebetween, the printed conductors extending between a first portion and an opposite second of the multilayered structure portion and terminating in a first plurality of connector pads at the first portion for connection to the connector block and in a second plurality of connector pads at the second portion for connection to the electronic circuits;

    disposing the hollow weld ring over the multilayered structure so as to have the first portion residing within the connector assembly and the second portion residing within the hermetically sealed housing;

    brazing the hollow weld ring onto a portion of an outer surface of the multilayered structure;

    forming a housing with an aperture dimensioned to fit about the weld ring; and

    welding the hollow weld ring to the housing so that the electronic circuits are hermetically sealed within the housing.

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