Cermet-containing bushing for an implantable medical device

• US 8,755,887 B2
• Filed: 08/04/2010
• Issued: 06/17/2014
• Est. Priority Date: 08/04/2009
• Status: Active Grant

• Current Assignee: Heraeus Deutschland GmbH & Co. KG (Heraeus Holding GMBH)
• Original Assignee: Heraeus Precious Metals GmbH & Co. KG (Einhorn Verwaltungsgesellschaft mbH)
• Inventors: Troetzschel, Jens, Specht, Heiko
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): Stice, Paula J
• Application Number:
  US12/850,406
• Publication Number:
  US 20110034965A1
• Time in Patent Office: 1,413 Days
• Field of Search: 607 36- 37
• US Class Current: 607/37
• CPC Class Codes: A61N 1/3754 Feedthroughs
• CPC Class Codes: H01B 13/0036 Details
• CPC Class Codes: H01B 17/306 by embedding in material other than glass or ceramics
• CPC Class Codes: H01B 19/00 Apparatus or processes specially adapted for manufacturing insulators or insulating bodies manufacture of porcelain for electric insulation C04B33/26
• CPC Class Codes: H05K 3/30 Assembling printed circuits with electric components, e.g. with resistor
• CPC Class Codes: Y10T 29/4913 Assembling to base an electrical component, e.g., capacitor, etc.
• CPC Class Codes: Y10T 29/49227 Insulator making

Abstract

One aspect relates to an electrical bushing for an implantable medical device, having an annulus-like holding element for holding the electrical bushing in the implantable medical device, whereby the holding element includes a through-opening, at least one elongated conduction element extends through the through-opening, and an insulation element for forming a hermetic seal between the holding element and the conduction element is arranged in the through-opening. One aspect provides for the at least one conduction element to include a cermet.

Claims

1. An electrical bushing for an implantable medical device, having an annulus-like holding element for holding the electrical bushing in the implantable medical device, whereby

the holding element comprises a through-opening;

at least one elongated conduction element extends through the through-opening and is configured to transmit electrical signals between inside and outside the implantable medical device;

an insulation element comprising aluminum oxide for forming a hermetic seal between the holding element and the conduction element is arranged in the through-opening;

characterized in that the at least one conduction element comprises cermet such that cermet is adjacent the insulation element thereby forming the hermetic seal therebetween without welding or soldering and in that the cermet comprises aluminum oxide in a metallic matrix.

2. The electrical bushing according to claim 1, characterized in that the holding element comprises a cermet.

3. The electrical bushing according to claim 2, characterized in that the conduction element and the holding element are made of the same material.

4. The electrical bushing according to claim 1, characterized in that the holding element consists of a cermet.

5. The electrical bushing according to claim 1, characterized in that the insulation element is made from an insulating composition of materials.

6. The electrical bushing according to claim 1, characterized in that the holding element comprises at least one flange.

7. The electrical bushing according to claim 6, characterized in that the at least one flange comprises a cermet, and in that the at least one flange and the holding element are made of the same material.

8. An implantable medical device comprising:

an electrical bushing having an annulus-like holding element for holding the electrical bushing in the implantable medical device;

wherein the holding element comprises a through-opening;

at least one elongated conduction element extending through the through-opening; and

an insulation element comprising aluminum oxide forming a hermetic seal between the holding element and the conduction element arranged in the through-opening;

wherein the at least one conduction element comprises cermet, such that cermet is adjacent the insulation element thereby forming a hermetic seal therebetween without welding or soldering and wherein the cermet comprises aluminum oxide in a metallic matrix.

9. The implantable medical device of claim 8, wherein the medical device is one of a cardiac pacemaker and a defibrillator.