Flexible substrate with electronic devices formed thereon

• US 7,678,701 B2
• Filed: 07/31/2006
• Issued: 03/16/2010
• Est. Priority Date: 07/31/2006
• Status: Expired due to Fees

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Tredwell, Timothy J., Kerr, Roger S.
• Primary Examiner(s): Le; Thao P.
• Application Number:
  US11/461,080
• Publication Number:
  US 20080026581A1
• Time in Patent Office: 1,324 Days
• Field of Search: None
• US Class Current: 438/691
• CPC Class Codes: H01L 27/1218 with a particular composition or structure of the substrate
• CPC Class Codes: H01L 27/1262 with a particular formation, treatment or coating of the substrate
• CPC Class Codes: H01L 29/78603 characterised by the insulating substrate or support H01L29/78657 takes precedence
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A method of manufacturing an electronic device (10) provides a substrate (20) that has a plastic material. A particulate material (16) is embedded in at least one surface of the substrate. A layer of thin-film semiconductor material is deposited onto the substrate (20).

Claims

1. A method of manufacturing an electronic device comprising:

a) providing a substrate that comprises at least one plastic material;

b) embedding a particulate material in at least one surface of the substrate;

c) forming a thin film electronic device on said surface with said particulate material; and

further comprising;

d) embedding the particulate material in a second surface of the substrate; and

e) forming a thin film electronic device on said second surface having said embedded particulate material.

2. The method of claim 1 wherein said particulate material is a fiber.

3. The method of claim 1 wherein said electronic device comprises one or more thin film transistors.

4. The method of claim 1 wherein the plastic material is taken from a group consisting of polyethylene terephthalate (HS-PET), polyethylenenapthalate (PEN), polycarbonate (PC), polyarylate (PAR), polyetherimide (PEI), polyethersulphone (PES), polyimide (PI), Teflon poly(perfluoro-alboxy)fluoropolymer (PFA), poly(ether ether ketone) (PEEK), poly(ether ketone) (PEK), poly(ethylene tetrafluoroethylene)fluoropolymer (PETFE), and poly(methyl methacrylate), acrylate/methacrylate copolymer (PMMA), cyclic polyolefins, ethylene-chiorotritluoro ethylene (E-CTFE), poly-tetrafluoro-ethylene (PTFE), and high density polyethylene (HDPE).

5. The method of claim 1 wherein the particulate material is selected from a group consisting of glass, ceramics, metals, plastics, and fiberglass.

6. The method of claim 1 wherein the step of embedding a particulate material comprises:

a) heating the plastic material to a temperature near its glass transition temperature Tg; and

b) applying the particulate material to the plastic material.

7. The method of claim 1 further comprising depositing a dielectric material onto said at least one surface of the substrate.

8. The method of claim 7 wherein the dielectric material comprises spun-on glass.

9. The method of claim 1 wherein the particulate material comprises particles that are substantially aligned with respect to one or two directions.

10. The method of claim 1 wherein the particulate material is magnetic.

11. The method of claim 1 wherein the particulate material comprises a ferromagnetic material.

12. The method of claim 1 wherein the particulate material is conductive.

13. The method of claim 1 wherein the plastic material comprises a combination of more than one plastic.

14. The method of claim 1 further comprising removing the substrate from a carrier.

15. The method of claim 1 wherein the particulate material is selected from a group consisting of fibers, rods, or platelets.

16. The method of claim 1 further comprising laminating the substrate onto another device.

17. The method of claim 1 wherein the plastic material is substantially transparent.

18. The method of claim 17 wherein the refractive index of the plastic material is substantially equal to the refractive index of the particulate material.

19. The method of claim 17 wherein the refractive index of the plastic material differs by more than 0.1 from the refractive index of the particulate material.

20. The method of claim 1 wherein the plastic material is substantially opaque.

21. The method of claim 1 wherein the plastic material comprises a light-absorptive colorant.

22. The method of claim 1 wherein the particulate material comprises a light-absorptive colorant.

23. The method of claim 1 wherein the step of providing the substrate comprises unwinding the substrate from a roll.

24. The method of claim 23 further comprising re-winding the substrate having the electronic device formed thereon onto a roll.

25. The method of claim 1 further comprising coupling the electronic device formed on said surface with a liquid crystal pixel.

26. The method of claim 1 further comprising coupling the electronic device formed on said surface with a light-emitting diode pixel.

27. The method of claim 1 further comprising coupling the electronic device formed on said surface with an organic light-emitting diode pixel.

28. The method of claim 1 further comprising coupling the electronic device formed on said surface with a stimulable phosphor pixel.

29. The method of claim 1 further comprising coupling the electronic device formed on said surface with a sensor pixel.

30. A method of manufacturing an electronic device comprising:

a) providing a substrate that comprises at least one plastic material;

b) forming a pattern on at least one surface of said substrate;

c) embedding a particulate material into the at least one surface of said substrate;

d) applying a planarization material to the surface of the substrate having the embedded particulate material, forming a planarization layer thereby;

e) forming a thin film electronic device on said surface with said particulate material; and

wherein the pattern comprises one or more lens elements.

31. The method of claim 30 wherein forming a pattern comprises embossing.

32. The method of claim 30 wherein the one or more lens elements are spatially aligned with the thin film electronic devices formed on said surface.