Production method for a ring electrode

Patent metadata

Field	Value
Publication number	US-10933233-B2
Application number	US-201916278275-A
Country	US
Kind code	B2
Filing date	Feb 18, 2019
Priority date	Feb 21, 2018
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

One aspect relates to a production method for a ring electrode, to a ring electrode, and to an electrode system. One method for the ring electrode includes providing an outer element, including an outer tube, providing a first inner element, including a first inner tube having a first core of a sacrificial material, providing a second inner element, including a second core of a sacrificial material, forming a composite tube by arranging the first inner element and the second inner element inside the outer element, the first inner element and the second inner element being arranged off-center with respect to one another, drawing the composite tube in a longitudinal direction of the composite tube, separating a composite tube disk from the composite tube, removing the sacrificial material of the first core, and removing the sacrificial material of the second core in order to obtain a contacting opening in the ring electrode.

First claim

What is claimed is:

1. A production method for a ring electrode, comprising:
providing an outer element, which comprises an outer tube;
providing a first inner element, which comprises a first inner tube having a first core of a sacrificial material;
providing a second inner element, which comprises a second core of a sacrificial material;
forming a composite tube by arranging the first inner element and the second inner element inside the outer element, the first inner element and the second inner element being arranged off-center with respect to one another;
drawing the composite tube in a longitudinal direction of the composite tube;
separating a composite tube disk from the composite tube;
removing the sacrificial material of the first core; and
removing the sacrificial material of the second core in order to obtain a contacting opening in the ring electrode.

2. The method of claim 1 , wherein the removal of the sacrificial material of the first core and/or of the sacrificial material of the second core is corrosion or etching.

3. The method of claim 1 , wherein the removal of the sacrificial material of the first core and/or of the sacrificial material of the second core is carried out with the aid of an acid comprising nitric acid, hydrochloric acid and/or hydrogen peroxide.

4. The method of claim 1 , wherein the sacrificial material of the first core and/or the sacrificial material of the second core is less noble than the material of the outer tube and/or of the first inner tube.

5. The method of claim 1 , wherein the outer tube and/or the first inner tube comprises one of a noble metal, a noble metal alloy, and a platinum-iridium alloy.

6. The method of claim 1 , wherein the first core of sacrificial material and/or the second core of sacrificial material comprises a non-noble metal alloy, and copper and/or MP35N.

7. The method of claim 1 , wherein the drawing of the composite tube is carried out with a deformation factor of between 3 and 25% per individual drawing.

8. The method of claim 1 , wherein the diameter of the first inner element is greater than the diameter of the second inner element.

9. The method of claim 1 , wherein the second inner element comprises a second inner tube, which encloses the second core.

10. The method of claim 1 further comprising:
providing a third inner element, which comprises a third core of a sacrificial material;
forming the composite tube by arranging the third inner element inside the outer element, the first, second and third inner elements being arranged off-center with respect to one another; and
removing the sacrificial material of the third core.

11. The method of claim 1 , wherein the production method does not comprise a recrystallization method.

12. A ring electrode, comprising:
an outer element;
a first inner element; and
a second inner element;
wherein the outer element comprises an outer tube;
wherein the first inner element and the second inner element are arranged inside the outer element, and the first inner element and the second inner element are arranged off-center with respect to one another, in order to form a composite tube;
wherein the outer element, the first inner element and the second inner element are drawn together in a longitudinal direction of the composite tube;
wherein the first inner element has a first inner tube, which encloses a first cavity from which a sacrificial material has been removed; and
wherein the second inner element encloses a second cavity from which a sacrificial material has been removed, and which forms a contacting opening in the ring electrode.

13. The ring electrode of claim 12 , wherein the ring electrode, as seen in a cross section, has a boundary line between the outer element and the first inner element.

14. The ring electrode of claim 12 configured in an electrode system and further comprising a conductor element, wherein the conductor element is connected to a contacting opening in the ring electrode.

15. The ring electrode of claim 12 configured in a cardiac pacemaker and/or for neurostimulation.

Assignees

• Heraeus Deutschland Gmbh & Co Kg

Inventors

• Leitold Christiane
• Keitel Oliver
• Le Hoang-Minh
• Krenzer Jörg

Classifications

• A61N1/36125

  Details of circuitry or electric components · CPC title

• A61B2562/125

  characterised by the manufacture of electrodes · CPC title

• A61B5/283

  Invasive · CPC title

• B21C1/003

  Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences · CPC title

• A61N1/37512

  Pacemakers · CPC title