Feedthrough array for use in implantable medical devices

• US 7,668,597 B2
• Filed: 03/31/2006
• Issued: 02/23/2010
• Est. Priority Date: 03/31/2006
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Engmark, David B., Ries, Andrew J.
• Primary Examiner(s): Bockelman; Mark W
• Assistant Examiner(s): Dinga; Roland
• Application Number:
  US11/278,232
• Publication Number:
  US 20070239223A1
• Time in Patent Office: 1,425 Days
• Field of Search: 607/36, 607/37, 361/302
• US Class Current: 607/37
• CPC Class Codes: A61N 1/3754 Feedthroughs

Abstract

A feedthrough array for use in an implantable medical device is provided including an insulator, a plurality of conductive feedthrough pins extending through the insulator, and a ferrule including a flange extending inwardly from a ferrule sidewall along at least a majority of a length of a first ferrule side. A capacitor is disposed over the insulator and conductively coupled to the ferrule flange.

Claims

1. A feedthrough array for use in an implantable medical device, comprising:

an insulator;

a plurality of conductive feedthrough pins extending through the insulator;

a ferrule comprising a base portion adapted to be electrically and hermetically coupled to a housing of the medical device, a sidewall extending inwardly from the base portion, the sidewall including opposing first and second ferrule sides extending between opposing first and second ferrule ends forming a cavity there between for receiving the insulator, and at least one cross beam that extends between the opposing first and second ferrule sides, the at least one cross beam being located between two of the plurality of conductive feedthrough pins;

a flange extending inwardly from the ferrule sidewall along at least a majority of a length of the first ferrule side, the flange having an interior surface, a top surface, and an exterior surface;

a capacitor disposed over the insulator, the capacitor having an inner termination and an outer termination;

a first conductive joint formed between the capacitor outer termination and the flange; and

a plurality of second conductive joints formed between the capacitor inner termination and the plurality of conductive feedthrough pins.

2. The feedthrough array of claim 1 further comprising a second flange extending inwardly from the ferrule sidewall along a portion of a length of the second ferrule side.

3. The feedthrough array of claim 2, wherein the first flange and the second flange are substantially straight.

4. The feedthrough array of claim 1 wherein the flange further extends along one of the first ferrule end and the second ferrule end.

5. The feedthrough array of claim 4 wherein the flange further extends along a portion of the second ferrule side.

6. The feedthrough array of claim 1 wherein the flange being one of a solid structure, a non-solid structure, and a plurality of individual structures.

7. The feedthrough array of claim 6 wherein the flange includes one or more ribs.

8. The feedthrough array of claim 1 wherein the first conductive joint being formed along at least one of the flange interior surface and the flange top surface.

9. The feedthrough array of claim 1 further comprising an oxidative resistant coating applied to at least one of the flange interior surface, the flange exterior surface and the flange top surface.

10. The feedthrough array of claim 1 wherein the base portion includes:

an insulator shelf for supporting the insulator,

and a weld zone for coupling the base portion to the IMD housing, wherein the weld zone and the insulator shelf are separated by a distance corresponding to the base portion height.

11. The feedthrough array of claim 10 wherein the distance separating the insulator shelf from the weld zone being about 0.032″

.

12. The feedthrough array of claim 1 wherein the flange being a generally U-shaped flange that extends inwardly along at least a portion of the first ferrule side and the second ferrule side.

13. A feedthrough array for use in an implantable medical device, comprising:

an insulator;

a plurality of conductive feedthrough pins extending through the insulator; and

a ferrule comprising;

a base portion adapted to be electrically and hermetically coupled to a housing of the medical device,

a sidewall extending inwardly from the base portion, the sidewall including opposing first and second ferrule sides extending between opposing first and second ferrule ends forming a cavity there between for receiving the insulator,

at least one cross beam that extends between the opposing first and second ferrule sides, the at least one cross beam being located between two of the plurality of conductive feedthrough pins, and

a flange extending inwardly from the ferrule sidewall along at least a majority of a length of the first ferrule side, the flange having an interior surface, a top surface, and an exterior surface.

14. The feedthrough array of claim 13, further comprising a second flange extending inwardly from the ferrule sidewall along a portion of a length of the second ferrule side.

15. The feedthrough array of claim 14, wherein the first flange and the second flange are substantially straight.

16. The feedthrough array of claim 13, wherein the flange being a generally U-shaped flange that extends inwardly along at least a portion of the first ferrule side and the second ferrule side.

17. The feedthrough array of claim 13, wherein the at least one cross beam is on an outwardly facing surface of the ferrule.

18. The feedthrough array of claim 13, wherein the plurality of conductive feedthrough pins are in a row, and the at least one cross beam transects the row such that the feedthrough pins extend through openings adjacent to the at least one cross beam.