CERMET-CONTAINING BUSHING FOR AN IMPLANTABLE MEDICAL DEVICE

• US 20110034965A1
• Filed: 08/04/2010
• Published: 02/10/2011
• Est. Priority Date: 08/04/2009
• Status: Active Grant

• Current Assignee: Heraeus Medevio GmbH & Company KG
• Original Assignee: WC Heraeus GmbH (Heraeus Holding GMBH)
• Inventors: Specht, Heiko, Troetzschel, Jens
• Granted Patent: US 8,755,887 B2
• Time in Patent Office: Days
• 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;

an insulation element 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 components made of cermet.

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

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

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

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 5, characterized in that the insulating composition of materials is at least one of a group comprising aluminum oxide, magnesium oxide, zirconium oxide, aluminum-titanate, and piezoceramics.

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

8. The electrical bushing according to claim 7, 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.

9. Use of at least one cermet-comprising conduction element in an electrical bushing according to claim 1 for an implantable medical device.

10. 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 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.

11. The implantable medical device of claim 10, wherein the medical device is one of a cardiac pacemaker and a defibrillator.

12. A method for producing an electrical bushing for an implantable medical device, the method comprising:

generating an insulation element green compact for an insulation element from an insulating composition of materials;

forming at least one cermet-containing conduction element green compact for a conduction element;

introducing the at least one conduction element green compact into the insulation element green compact;

firing the insulation element green compact and the at least one conduction element green compact to obtain an insulation element with at least one conduction element.

13. The method according to claim 12, further comprising surrounding the insulation element, at least in part, with a holding element.

14. The method according to claim 12, characterized in that generating an insulation element green compact comprises partial sintering of the insulation element green compact.

15. The method according to claim 12, characterized in that forming at least one cermet-containing conduction element green compact comprises partial sintering of the conduction element green compact.

16. The method according to claim 12, characterized in that, prior to firing the insulation element green compact and the at least one conduction element green compact, the method comprises:

producing a cermet-containing holding element green compact for a holding element,

introducing at least one bearing element green compact into the insulation element green compact, and introducing the insulation element green compact into the holding element green compact;

whereby firing the insulation element green compact and the at least one conduction element green compact comprises firing the insulation element green compact and the at least one bearing element green compact and the holding element green compact to obtain an insulation element with at least one bearing element and a holding element.

17. The method according to claim 16, characterized in that the production of the cermet-containing holding element green compact comprises partial sintering.