Electrical bushing with gradient cermet

• US 9,407,076 B2
• Filed: 09/10/2013
• Issued: 08/02/2016
• Est. Priority Date: 02/02/2010
• Status: Active Grant

• Current Assignee: Heraeus Medevio GmbH & Company KG
• Original Assignee: Heraeus Precious Metals GmbH & Co. KG (Einhorn Verwaltungsgesellschaft mbH)
• Inventors: Troetzschel, Jens, Pavlovic, Goran, Manhardt, Harald, Staudt, Nicole
• Primary Examiner(s): Estrada, Angel R
• Application Number:
  US14/023,096
• Publication Number:
  US 20140008121A1
• Time in Patent Office: 1,057 Days
• Field of Search: 174/152.R, 174/659, 174/11.BH, 174/12.BH, 174/18, 174/152.GM, 174/257, 174/264, 174/262, 174/137, 174/138.R, 174/142, 607/37, 607/116, 607/117, 607/118, 607/119, 607/38, 607/5, 264/614, 361/302, 361/307, 361/306.1, 333/182, 439/909
• US Class Current: 1/1
• CPC Class Codes: A61N 1/3754 Feedthroughs
• CPC Class Codes: B28B 1/00 Producing shaped prefabricated articles from the material using presses B28B3/00; shaping on moving conveyors B28B5/00; producing tubular articles B28B21/00 ; producing articles with embedded elements B28B23/00
• CPC Class Codes: B28B 11/24 for curing, setting or hardening processes for influencing or modifying the setting or hardening ability of mortars, concrete or artificial stone compositions, in general C04B40/00
• CPC Class Codes: B29C 71/02 Thermal after-treatment B29C71/0063 and B29C71/0072 take precedence
• CPC Class Codes: H02G 1/00 Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
• CPC Class Codes: H02G 3/18 providing line outlets
• CPC Class Codes: H02G 3/22 Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing
• CPC Class Codes: Y10T 29/49158 with molding of insulated base
• CPC Class Codes: Y10T 29/49163 with sintering of base

Abstract

One aspect relates to a method for producing an electrical bushing for an implantable device, an electrical bushing, and an implantable device. The method according to one embodiment includes forming a base body from a ceramic slurry and introducing a bushing conductor made of a metal or cermet material with a metal fraction into the base body. The metal fraction in the bushing conductor is provided to decrease towards the base body. It includes sintering the green blank that includes the base body and the bushing conductor.

Claims

1. An electrical bushing for an implantable device comprising:

an electrically insulating base body; and

at least one electrically conductive bushing conductor that extends through the base body;

wherein the base body is produced from a sintered ceramic material, characterized in that the at least one bushing conductor comprises a metal or cermet material that has been jointly sintered with the base body and has a metal fraction that decreases from the interior of the bushing conductor towards the outside.

2. The electrical bushing according to claim 1, characterized in that the base body is connected circumferentially to a wreath-shaped fringe body made of a cermet material through a firmly bonded sintered connection, whereby the fringe body comprises a receiving opening, in which the base body is arranged.

3. The electrical bushing according to claim 1, characterized in that it is hermetically sealed for gases and liquids.

4. The electrical bushing of claim 1, which is produced by:

forming the base body from a ceramic slurry;

introducing the bushing conductor made of a metal powder, metal slurry, cermet powder and/or cermet slurry into the base body, whereby the metal fraction in the bushing conductor is provided to decrease towards the base body; and

sintering the green blank that comprises the base body and the bushing conductor.

5. An implantable device comprising:

an electrical bushing having an electrically insulating base body; and

at least one electrically conductive bushing conductor that extends through the base body;

wherein the base body is produced from a sintered ceramic material; and

wherein the electrical bushing is characterized in that the at least one bushing conductor comprises a metal or cermet material that has been jointly sintered with the base body and has a metal fraction that decreases from the interior of the bushing conductor towards the outside.

6. The implantable device according to claim 5, characterized in that the electrical bushing is surrounded by transition layers comprising a cermet and a metal fraction that is lower than the metal fraction of the busing conductor.