Filtering capacitor feedthrough assembly

• US 7,502,217 B2
• Filed: 02/16/2007
• Issued: 03/10/2009
• Est. Priority Date: 02/16/2007
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Iyer, Rajesh, Zhao, Jennifer J., Knowles, Shawn D., Goldman, Simon E., Litow, Micah A., Belete, Dawit Y.
• Primary Examiner(s): Thomas; Eric
• Assistant Examiner(s): Sinclair; David M
• Application Number:
  US11/675,880
• Publication Number:
  US 20080198530A1
• Time in Patent Office: 753 Days
• Field of Search: 361/307, 361/302, 361/306.1, 607/2, 607/5
• US Class Current: 361/307
• CPC Class Codes: A61N 1/3754 Feedthroughs
• CPC Class Codes: H01G 2/10 Housing; Encapsulation
• CPC Class Codes: H01G 4/35 Feed-through capacitors or anti-noise capacitors
• CPC Class Codes: Y10T 29/435 Solid dielectric type
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

A filtering capacitor feedthrough assembly for an implantable active medical device is disclosed. The filtering capacitor feedthrough assembly includes a capacitor having an aperture, the capacitor is electrically grounded to an electrically conductive feedthrough ferrule or housing of the implantable active medical device. A terminal pin extends into the aperture and an electrically conductive continuous coil is disposed within the aperture and between the terminal pin and the capacitor. The electrically conductive continuous coil mechanically secures and electrically couples the terminal pin to the capacitor.

Claims

1. A filtering capacitor feedthrough assembly for an implantable active medical device comprising:

a capacitor having an aperture, the capacitor electrically grounded to an electrically conductive feedthrough ferrule or housing of the implantable active medical device with an electrically conductive continuous coil comprising an inner diameter defined by a plurality of coils, each coil having a coil diameter different than the inner diameter, with the capacitor present within the inner diameter of the continuous coil so that the plurality of coils circumferentially surround the capacitor and an exterior surface of the capacitor defines a ledge and the electrically conductive continuous coil is disposed on the ledge; and

a terminal pin extending into the aperture, the terminal pin mechanically secured and electrically coupled to the capacitor.

2. A filtering capacitor feedthrough assembly according to claim 1, wherein the continuous coil is compressed between the capacitor and the electrically conductive feedthrough ferrule or housing of the implantable active medical device.

3. A filtering capacitor feedthrough assembly according to claim 1, wherein the plurality of coils are canted.

4. A filtering capacitor feedthrough assembly according to claim 1, comprising two or more continuous coils disposed between the capacitor and the electrically conductive feedthrough ferrule or housing of the implantable active medical device.

5. A filtering capacitor feedthrough assembly according to claim 1, wherein the filtering capacitor feedthrough assembly comprises two or more terminal pins and corresponding capacitor apertures within the capacitor, and the electrically conductive continuous coil electrically grounds the capacitor to the electrically conductive feedthrough ferrule or housing of the implantable active medical device.