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Installation of filter capacitors into feedthroughs for implantable medical devices

  • US 6,920,673 B2
  • Filed: 08/02/2002
  • Issued: 07/26/2005
  • Est. Priority Date: 01/02/2002
  • Status: Expired due to Fees
First Claim
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1. A process for brazing a filter capacitor in a feedthrough device, comprising the acts of:

  • a) providing a ferrule defining a capacitor receiving recess;

    b) disposing a capacitor in the capacitor receiving recess;

    c) providing the capacitor with a passageway, the capacitor having a metallized external surface and a metallized internal surface about the capacitor passageway;

    d) positioning a lead passing through the capacitor passageway;

    e) positioning an annular preform of a capacitor braze material comprising a silver-copper alloy contacting the ferrule and the metallized external surface of the capacitor;

    f) wrapping a thread of the capacitor braze material about the lead and contacting the metallized internal surface of the capacitor; and

    g) heating the capacitor braze material, thereby brazing the preform connecting the capacitor'"'"'s metallized external surface to the ferrule forming a capacitor-ferrule braze joint and connecting the capacitor'"'"'s metallized internal surface to the lead forming a capacitor-lead braze joint.

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