Liquid manufacturing processes for panel layer fabrication

• US 7,025,648 B2
• Filed: 03/02/2004
• Issued: 04/11/2006
• Est. Priority Date: 10/27/2000
• Status: Expired due to Term

• Current Assignee: Leidos, Inc. (Leidos Holdings, Inc.)
• Original Assignee: Science Applications International Corporation
• Inventors: Green, Albert M., Wyeth, N. Convers, George, E. Victor
• Primary Examiner(s): WILLIAMS, JOSEPH L
• Application Number:
  US10/789,976
• Publication Number:
  US 20040166762A1
• Time in Patent Office: 770 Days
• Field of Search: 445/24, 445/58
• US Class Current: 445/24
• CPC Class Codes: A61L 2/10 Ultraviolet radiation
• CPC Class Codes: A61L 9/20 Ultraviolet radiation
• CPC Class Codes: G02B 6/0033 Means for improving the coupling-out of light from the light guide
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: H01J 11/18 containing a plurality of independent closed structures for containing the gas, e.g. plasma tube array [PTA] display panels
• CPC Class Codes: H01J 65/046 the field being produced by using capacitive means around the vessel
• CPC Class Codes: H01J 9/02 Manufacture of electrodes or electrode systems
• CPC Class Codes: H01J 9/022 of cold cathodes
• CPC Class Codes: H01J 9/185 of flat panel display devices, e.g. by using spacers
• CPC Class Codes: H01J 9/241 the vessel being for a flat panel display H01J9/261 takes precedence; flat discharge lamps H01J9/248

Abstract

A method for manufacturing a light-emitting panel sandwiches a plurality of micro-components between two flexible substrates in a web configuration. Each micro-component contains a gas or gas-mixture capable of ionization when a sufficiently large voltage is supplied across the micro-component via at least two electrodes. The micro-components are disposed in sockets formed at pre-determined locations in a first dielectric substrate so that they are adjacent to electrodes imprinted in the first substrate. Dielectric layers and the conductors for acting as electrodes are formed using liquid processes or combined liquid and sheet processes, where liquid materials are applied to the surface of the underlying layer, then cured to complete the formation of layers. The assembled layers are coated with a protective coating and may include an RF shield. In one embodiment, patterning of the conductors is achieved by applying conductive ink using an ink jet process. In another embodiment, the conductors may be patterned photolithographically using a leaky optical waveguide as a contact mask.

Claims

1. A method comprising:

providing a first substrate, the first substrate having a first conductor formed thereon;

disposing at least one micro-component adapted to emit radiation at a first location on the first substrate corresponding to the first conductor;

forming a dielectric layer on the first substrate;

forming a second conductor on the dielectric layer to interact with the first conductor to excite the micro-component; and

applying a top layer over the dielectric layer and the second conductor.

2. The method of claim 1, wherein the step of forming a dielectric layer on the first substrate comprises:

depositing a liquid dielectric material onto the first substrate to electrically isolate the micro-component from any other micro-component on the first substrate; and

curing the liquid dielectric material to form a dielectric layer.

3. The method of claim 1, wherein the step of forming the second conductor comprises:

depositing a conductive liquid on top of the dielectric layer at a second location adapted to interact with the first conductor to excite the micro-component; and

curing the conductive liquid to create a conductive layer for providing the second conductor.

4. The method of claim 1, further comprising:

coating the micro-component with a phosphor material.

5. The method of claim 1, further comprising:

immersing the micro-component in a slurry of phosphor particles to form a phosphor coating; and

curing the phosphor coating formed on the micro-component.

6. The method of claim 3, further comprising:

depositing a liquid black mask layer onto the first substrate and the conductive layer; and

curing the liquid mask material to form a black mask layer.

7. The method of claim 3, further comprising:

photolithographically patterning the conductive layer to form the second conductor.

8. The method of claim 7, wherein the step of photolithographically patterning comprises:

selectively exposing a photosensitive material by contacting the photosensitive material with a leaky optical waveguide.

9. The method of claim 1, wherein the first substrate has a dimple formed therein at the first location.

10. The method of claim 9, wherein an adhesive material is applied within the dimple for securing the micro-component in the dimple.

11. The method of claim 3, wherein the step of depositing a conductive liquid comprises printing an electrode pattern with a conductive ink.

12. The method of claim 11, wherein the printing comprises inkjet printing.

13. The method of claim 2, wherein the liquid dielectric material has a surface tension adapted to provide a uniform thickness across the first substrate.

14. The method of claim 2, wherein the liquid dielectric material includes a surfactant.

15. The method of claim 1, further comprising disposing an RF screen over the top layer.

16. A method comprising:

providing a first dielectric substrate material;

printing an electrode on the first dielectric material;

forming a socket at a location in the first dielectric material;

disposing a micro-component adapted to emit light in the socket;

forming a dielectric layer on the first dielectric material;

printing a second electrode over the dielectric layer; and

applying a top layer over the dielectric layer, the second electrode, and the micro-component.

17. The method of claim 16, wherein the step of providing the first dielectric substrate material comprises:

feeding the first dielectric substrate material from a payout reel in a web coating machine.

18. The method of claim 16, wherein the step of forming a dielectric layer on the first dielectric material comprises:

applying a liquid dielectric material over the first dielectric material, the first plurality of electrodes, and at least a portion of the micro-component; and

curing the liquid dielectric material to form the dielectric layer.

19. The method of claim 16, wherein the step of printing the second electrode over the dielectric layer comprises:

printing the second electrode over the dielectric layer using a conductive ink; and

curing the conductive ink.

20. The method of claim 16, further comprising:

applying an adhesive material within the socket for securing the micro-component.

21. The method of claim 16, wherein the step of disposing the micro-component in the socket comprises using electrostatic sheet transfer to place the micro-component into the socket.

22. The method of claim 16, wherein the step of printing the second electrode over the dielectric layer comprises inkjet printing.

23. The method of claim 18, wherein the liquid dielectric material has a surface tension adapted to provide a uniform thickness across the first substrate.

24. The method of claim 18, wherein the liquid dielectric material includes a surfactant.

25. The method of claim 16, further comprising:

disposing an RF screen over the top layer.

26. The method of claim 16, further comprising:

coating the micro-component with a phosphor material.

27. The method of claim 16, further comprising:

immersing the micro-component in a slurry of phosphor particles to form a phosphor coating; and

curing the phosphor coating formed on the micro-component.

28. The method of claim 19, further comprising:

depositing a liquid black mask layer onto the first substrate and the conductive ink; and

curing the liquid mask material to form a black mask layer.

29. A method for forming a flexible light emitting panel comprising:

feeding a first dielectric substrate material from a payout reel in a web coating machine;

printing a first electrode on the first dielectric material;

forming a socket at a location in the first dielectric material;

disposing a micro-component adapted to emit light in the socket;

aligning a second sheet material having dielectric properties over the first dielectric substrate material and the first electrode, wherein the second dielectric sheet material has an opening therethrough corresponding to the location, the opening having a diameter larger than an outer diameter of the micro-component;

so that a gap is created between an inner diameter of each opening and the outer diameter of each micro-component;

providing a dielectric material over at least a portion of the second sheet material so that the gap corresponding to the micro-component is filled;

printing a second electrode over the second sheet material; and

applying a top layer over the second sheet material, the second electrode and the micro-component.

30. The method of claim 29, wherein the step of provide the dielectric material comprises:

applying a liquid dielectric material over at least a portion of the second sheet material so that the gap corresponding to the micro-component is filled, the liquid dielectric material having dielectric properties adapted for control of electric field and breakdown characteristics of the micro-component; and

curing the liquid dielectric material.

31. The method of claim 29, wherein the step of printing the second electrode comprises:

printing the second electrode over the second sheet material using a conductive ink; and

curing the conductive ink.

32. The method of claim 29, further comprising:

applying an adhesive material within the socket for securing the micro-component in the socket.

33. The method of claim 29, wherein the step of disposing the micro-component in the socket comprises:

using electrostatic sheet transfer to place the micro-component into the socket.

34. The method of claim 29, wherein the step of printing the second electrode comprises inkjet printing.

35. The method of claim 30, wherein the liquid dielectric material includes a surfactant.

36. The method of claim 29, further comprising disposing an RF screen over the top layer.

37. The method of claim 29, further comprising:

coating the micro-component with a phosphor material.

38. The method of claim 29, further comprising:

immersing the micro-component in a slurry of phosphor particles to form a phosphor coating; and

curing the phosphor coating formed on the micro-component.

39. The method of claim 29, further comprising:

depositing a liquid black mask layer onto the first substrate and the conductive ink; and

curing the liquid mask material to form a black mask layer.