Method of forming a medical device comprising graphene

Patent metadata

Field	Value
Publication number	US-11040191-B2
Application number	US-201615556984-A
Country	US
Kind code	B2
Filing date	Mar 9, 2016
Priority date	Mar 9, 2015
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

The invention concerns a method of forming a medical device, the method comprising: forming a graphene film ( 100 ) over a substrate ( 204 ); depositing, by gas phase deposition, a polymer material covering a surface of the graphene film ( 100 ); and removing the substrate ( 204 ) from the graphene film ( 100 ), wherein the polymer material forms a support ( 102 ) for the graphene film ( 100 ).

First claim

The invention claimed is:

1. A method of forming a medical device, the method comprising:
forming a graphene film over a substrate;
depositing, by gas phase deposition, a polymer material covering a surface of the graphene film;
removing the substrate from the graphene film, wherein the polymer material forms a support for the graphene film;
providing an adhesive band covering the polymer support and holding the graphene film in contact with a body of an animal or human; and
electrically coupling a wire contact to the graphene film.

2. The method of claim 1 , wherein the polymer material comprises a polymer from the n-xylylene family.

3. The method of claim 2 , wherein the polymer material comprises parylene.

4. The method of claim 1 , wherein removing the substrate from the graphene film is performed by a process of electrochemical delamination.

5. The method of claim 1 , wherein electrically coupling the wire contact to the graphene film comprises, prior to depositing the polymer material, forming the wire contact on the surface of the graphene film, wherein depositing the polymer material comprises coating the wire contact with the polymer material.

6. The method of claim 1 , further comprising forming a conductive electrode patch of the conductive medical patch and a current supply circuit, the current supply circuit being adapted to apply a current between the graphene film and the conductive electrode patch, wherein the adhesive band is also suitable for holding the conductive electrode patch in contact with the body.

7. The method of claim 1 , wherein the conductive medical patch is a transparent hydrocolloidal dressing, the graphene film forming an external surface for contact with a wound, and the polymer material being a porous layer positioned between the graphene film and a pad formed of a hydrocolloid.

8. The method of claim 1 , wherein the polymer material is deposited over the graphene film in a layer of between 5 and 40 nm in thickness.

9. A method for forming an ophthalmic element, the method comprising:
forming a graphene film over a substrate;
depositing, by gas phase deposition, a polymer material covering a surface of the graphene film; and
removing the substrate from the graphene film, wherein the polymer material forms a support for the graphene film;
wherein the substrate on which the graphene film is formed has a curved surface having a shape compatible with the surface of an eye.

10. The method of claim 9 , wherein a surface of the substrate on which the graphene film is formed comprises a pattern of first and second materials, the first material and not the second material supporting graphene formation, the method comprising selectively forming said graphene film over said first material and not over said second material.

11. A method for forming an implant, the method comprising:
forming a graphene film over a substrate;
depositing, by gas phase deposition, a polymer material covering a surface of the graphene film; and

removing the substrate from the graphene film, wherein the polymer material forms a support for the graphene film;
wherein the substrate on which the graphene film is formed is a mold having an inner surface having the form of the implant, and wherein after the graphene film has been deposited on the inner surface of the mold, the mold is filled by the polymer material to form a polymer core of the implant that supports the graphene film.

12. The method of claim 11 , wherein a portion of said mold is not removed such that it remains in contact with the graphene film and forms an electrode of the implant.

Assignees

• Centre Nat Rech Scient
• Univ Grenoble Alpes

Inventors

• Kalita Dipankar
• Bouchiat Vincent
• Marty Laetitia
• Bendiab Nedjma

Classifications

• A61L31/10

  Macromolecular materials · CPC title

• A61N1/0551

  Spinal or peripheral nerve electrodes · CPC title

• A61L31/024

  Carbon; Graphite · CPC title

• A61N1/0492

  Patch electrodes (A61N1/0412, A61N1/0428 take precedence) · CPC title

• A61L31/14

  Materials characterised by their function or physical properties {, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials} · CPC title