Printed electronics

Patent metadata

Field	Value
Publication number	US-10244628-B2
Application number	US-201815911623-A
Country	US
Kind code	B2
Filing date	Mar 5, 2018
Priority date	Feb 5, 2008
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

Printed electronic device comprising a substrate onto at least one surface of which has been applied a layer of an electrically conductive ink comprising functionalized graphene sheets and at least one binder. A method of preparing printed electronic devices is further disclosed.

First claim

The invention claimed is:

1. A combination, comprising:
an electronic device comprising a hinge or a bendable junction;
a printed electronic device traversing the hinge or the bendable junction, the printed electronic device comprising
a substrate comprising a surface;
an electrically conductive ink applied to the surface and comprising functionalized graphene sheets and a binder; and
wherein the functionalized graphene sheets
completely comprise fully exfoliated single sheets of graphene; and
comprise at least one of an X-ray or electron diffraction pattern that displays little or no signature corresponding to graphite or graphite oxide.

2. The combination of claim 1 , wherein the electrically conductive ink is a gel.

3. The combination of claim 1 , wherein the printed electronic device is one of a complete device, a sub-element of a device, and an electronic component.

4. The combination of claim 1 , wherein the printed electronic device further comprises a material positioned between the substrate and the electrically conductive ink, the material comprising one or more of a semiconductor, a metal foil, and a dielectric material.

5. The combination of claim 1 , wherein the electrically conductive ink further comprises a metal-coated material comprising one or more of a particle, a powder, a flake, a foil, and a needle.

6. The combination of claim 1 , wherein the electrically conductive ink further comprises a metal-coated material comprising one or more of a glass fiber, a glass bead, and a ceramic material.

7. The combination of claim 1 , wherein the functionalized graphene sheets comprise a molar carbon-to-oxygen molar ratio of at least 100:1.

8. The combination of claim 1 , wherein
the printed electronic further comprises a material positioned over the electrically conductive ink; and
the material comprises one or more of an dielectric coating or an electrolyte.

9. The combination of claim 1 , wherein
the printed electronic device further comprises a material positioned between the electrically conductive ink and the substrate; and
the material comprises one or more of a semiconductor, a metal foil, and a dielectric material.

10. The combination of claim 1 , wherein the printed electronic device is in the form of a printed circuit board.

11. The combination of claim 1 , wherein the printed electronic device is in the form of a transistor.

12. The combination of claim 1 , wherein the printed electronic device is in the form of a field-effect transistor.

13. The combination of claim 1 , wherein the printed electronic device is in the form of a microelectromechanical system device.

14. A method to fabricate a combination, comprising:
exfoliating graphite to form functionalized graphene sheets, the functionalized graphene sheets
completely consisting of fully exfoliated single sheets; and
comprising at least one of an X-ray or electron diffraction pattern that displays little or no signature corresponding to graphite or graphite oxide;

forming an electrically conductive ink by combining the functionalized graphene sheets and a binder;
printing the electrically conductive ink on to a surface of a substrate thereby forming a printed electronic device, the electrically conductive ink is printed as a conductive pathway; and
applying the printed electronic device to one of a hinge or a bendable junction of an electronic device, the printed electronic device traversing the hinge or the bendable junction of the electronic device.

15. The method of claim 14 , wherein the printed electronic device is one of a complete device, a sub-element of a device, and an electronic component.

16. The method of claim 14 , further comprising applying a material between the substrate and the electrically conductive ink, the material comprising one or more of a semiconductor, a metal foil, and a dielectric material.

17. The method of claim 14 , further comprising applying a material between the substrate and the electrically conductive ink, the material comprising one or more of a semiconductor, a metal foil, and a dielectric material.

18. The method of claim 14 , further comprising applying a material on to the electrically conductive ink, the material comprising one or more of an dielectric coating or an electrolyte.

Assignees

• Univ Princeton
• Vorbeck Mat Corporation

Inventors

• Crain John M
• Lettow John S
• Aksay Ilhan A
• Korkut Sibel
• Chiang Katherine S
• Chen Chuan-Hua
• Prud'Homme Robert K

Classifications

• Y10S977/932

  for electronic or optoelectronic application · CPC title

• C09D7/65

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C01P2004/02

  obtained by optical microscopy · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C09D177/00

  Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain (based on polyhydrazides C09D179/06; based on polyamide-imides C09D179/08); Coating compositions based on derivatives of such polymers · CPC title