Multi-layered structure and method

Patent metadata

Field	Value
Publication number	US-9498142-B2
Application number	US-201414323163-A
Country	US
Kind code	B2
Filing date	Jul 3, 2014
Priority date	Jul 3, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

One aspect relates to a method for producing a layered structure, including providing a substrate, forming a first layer onto at least part of the substrate, the first layer being a first polymer, and forming a second layer onto at least part of the first layer, the second layer being a second polymer. The substrate and the second layer are electrically conductive and the first layer is insulating or the substrate and the second layer are insulating and the first layer is electrically conductive. Forming each of the first and second layers includes forming such that each layer is no more than one tenth of the thickness of the substrate.

First claim

What is claimed is:

1. A method for producing a layered structure comprising:
providing a substrate having a thickness and comprising a material that is biocompatible;
forming a first layer onto at least part of the substrate, the first layer being a first biocompatible polymer;
forming a second layer onto at least part of the first layer, the second layer being a second biocompatible polymer;
wherein the substrate and the second layer are electrically conductive and the first layer is insulating or the substrate and the second layer are insulating and the first layer is electrically conductive; and
characterized in that forming each of the first and second layers comprises forming such that each of the first and second layers is no more than one tenth of the thickness of the substrate and such that each are configured for implantation within the human body.

2. The method according to claim 1 , wherein at least one of the first and second layers comprises an electrically conductive PEDOT material.

3. The method according to claim 1 characterized in that forming each of the first and second layers comprises forming such that each of the first and second layers is no more than one fiftieth of the thickness of the substrate.

4. The method according to claim 1 , wherein forming of at least one of the first and second layers comprises masking ends of the layer to define contact areas that are configured for attaching an electrically conducting contact.

5. The method according to claim 1 , wherein forming of at least one of the first and second layers comprises using a conductive PEDOT polymer followed by using a chemical etch to change at least portions of the layer from conductive to insulative.

6. The method according to claim 1 , further comprising forming a third layer over the second layer, the third layer comprising an insulative photoresist material.

7. A method for producing a layered cylindrical structure comprising:
providing a substrate having a diameter and comprising a material that is biocompatible;
forming a first layer onto at least part of the substrate, the first layer being a first biocompatible polymer;
forming a second layer onto at least part of the first layer, the second layer being a second biocompatible polymer, such that both the first and second layers are configured for implantation within the human body;
wherein the substrate and the second layer are electrically conductive and the first layer is insulating or the substrate and the second layer are insulating and the first layer is electrically conductive; and
characterized in that forming each of the first and second layers comprises forming such that each of the first and second layers has a thickness that is no more than one tenth of the diameter of the substrate such that overall dimensions of the layered structure are substantially determined by the diameter of the substrate.

8. The method of claim 7 , wherein providing the substrate comprises providing one of a wire and a needle.

9. The method according to claim 7 , wherein at least one of the first and second layers comprises an electrically conductive PEDOT material.

10. The method according to claim 7 characterized in that forming each of the first and second layers comprises forming such that each of the first and second layers is no more than one fiftieth of the thickness of the substrate.

11. The method according to claim 7 , wherein forming of at least one of the first and second layers comprises masking ends of the layer to define contact areas that are configured for attaching an electrically conducting contact.

12. The method according to claim 7 , wherein forming of at least one of the first and second layers comprises using a conductive PEDOT polymer followed by using a chemical etch to change at least portions of the layer from conductive to insulative.

13. The method according to claim 7 , further comprising forming a third layer over the second layer, the third layer comprising an insulative photoresist material.

Assignees

• Heraeus Precious Metals Gmbh
• Heraeus Deutschland Gmbh & Co Kg

Inventors

• Hafiz Jami A
• Schibli Stefan
• Troetzschel Jens

Classifications

• A61N1/05 Primary

  for implantation or insertion into the body, e.g. heart electrode (A61N1/06 takes precedence) · CPC title

• H01B1/127 Primary

  comprising five-membered aromatic rings in the main chain, e.g. polypyrroles, polythiophenes · CPC title

• B21F19/00

  Metallic coating of wire (by extruding B21C23/24; by soldering or welding, e.g. cladding or plating, B23K) · CPC title

• C08G2261/65

  Electrical insulator · CPC title

• A61B5/6846

  specially adapted to be brought in contact with an internal body part, i.e. invasive · CPC title