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1. WO1996003764 - FLAT DISPLAY SPACER STRUCTURE AND MANUFACTURING METHOD

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

AMENDED CLAIMS
[received by the International Bureau on 19 February 1996 (19.02.96);
original claims 1-7, 10, 12 and 16 amended; new claim 19 added;
remaining claims unchanged (4 pages)]
1. A display panel comprising:

an anode plate;

an electron source plate comprising an array of field emitter elements; and

spacing means for maintaining said anode plate and electron source plate in spaced relationship to one another, said spacing means comprising a planar matrix support structure of intersecting elongate members, which define a plurality of individual ceils therebetween, said matrix support structure being formed as a unitary spacer structure having photoformed spacer elements integrally joined perpendicularly to the planar support structure at points of intersection of the intersecting elongate members and interposed in bearing and supporting relationship between said anode and electron source plates, said individual cells defining pixel regions of the display panel.

2. A display panel according to claim 1 , wherein said photoformed spacer elements are arranged at each of said points of Intersection of the intersecting elongate members to circumscribingly bound each of the individual cells.

3. A display panel according to claim 1 , wherein each of the pixel regions comprises a single pixel.

4. A display panel according to claim 2, wherein each of the pixel regions comprises an array of pixels.

5. A display panel according to claim 1, wherein the Intersecting elongate members are perpendicularly arranged forming a grid-structure having the spacer elements joined at the intersections thereof.

6. A display panel according to claim 5, wherein the spacer elements in said spacer structure comprise columnar elements extending upwardly from the grid-structure.

7. A display panel according to claim 1 , wherein the intersecting elongate members and photoformed spacer elements of said spacing means are formed, developed, and etched from a unitary block of photoformable material to yield a support grid structure having said spacer elements which bound openings which define the pixel regions for throughput of electrons from the electron source plate through the spacing means to the anode plate.

8. A display panel according to claim 1 , wherein the unitary spacer structure is formed of a developed and etched glass material comprising said photoformed spacer elements.

9. A display panel according to claim 1, wherein the anode plate comprises an anode plate substrate metalized with a reflective/conductive metal anode layer of patterned character defining non-metallzed openings surrounded by metalized regions of the metalized anode layer, wherein the spacer elements are aligned with the non-metalized openings in the metalized anode layer.

10. A method of making a display panel comprising an anode plate, an electron source plate including an array of field emitter elements, and a spacer structure including a plurality of spacer elements, interposed between said anode and electron source plates, comprising the steps of:

providing a photosensitive material workpiece as a precursor structure of at least a portion of said spacer structure comprising said spacer elements;

exposing a surface of said photosensitive material workpiece to photosensitizing ly effective radiation for sufficient time and at sufficient intensity to photosensitize selected portions of the photosensitive material workpiece;

removing non-photoexposed material from said workpiece to yield at least a portion of said spacer structure including a plurality of spacer elements, and forming the spacer structure to comprise a planar matrix support structure of intersecting elongate members, which define a plurality of individual cells therebetween, as a unitary spacer structure having photoformed spacer elements integrally joined perpendicularly to the planar support structure at points of Intersection of the Intersecting elongate members; and interposing the spacer structure between said anode and electron source plates, such that the anode and electron source plates are maintained in spaced-apart relationship to one another by said spacer structures and so that the individual cells define pixel regions of the display panel.

11. A method according to claim 10, wherein the array of field emitter elements and said anode plate define a multiplicity of pixels, and wherein the photoformed spacer elements circumscribingly bound a predetermined pixel region.

12. A method according to claim 11 , wherein the pixel region comprises a pixel array.

13. A method according to claim 11 , wherein the pixel region comprises a single pixel.

14. A method according to claim 10, wherein the spacer structure comprises a support matrix of perpendicularly arranged arrays of elements forming a grid structure having the spacer elements joined thereto.

15. A method according to claim 14, wherein the spacer elements in said spacer structure comprise columnar elements extending upwardly from the grid structure.

16. A method according to claim 10, wherein the spacer structure is formed, developed, and etched from a unitary block of photoformable material to yield a support grid structure having said spacer elements which bound openings which define the pixel regions for throughput of electrons from the electron source plate through the spacing means to the anode plate.

17. A method according to claim 10, wherein the spacer structure is formed of a developed and etched glass material comprising said photoformed spacer elements.

18. A method according to claim 10, wherein the anode plate comprises an anode plate substrate metalized with a reflective/conductive metal anode layer of patterned character defining non-metalized openings surrounded by metalized regions of the metalized anode layer, and wherein the spacer elements are aligned with the non-metalized openings in the metalized anode layer.

19. A display panel comprising:

an anode plate;

an electron source plate comprising an array of field emitter elements; and

spacing means for maintaining said anode plate and electron source plate in spaced relationship to one another, said spacing means comprising a planar matrix support structure of intersecting elongate members, which define a plurality of individual cells therebetween, said matrix support structure being formed as a unitary spacer structure having spacer elements integrally mounted to and extending perpendicularly from the planar support structure at points of Intersection of the intersecting elongate members and interposed in bearing and supporting relationship between said anode and electron source plates, said Individual cells defining pixel regions of the display screen, and wherein said spacer elements have been formed of photoreactive material which has been selectively shaped by preferential etching of the material and coated with an insulative layer for charge leakage control.