Electric lamp or space discharge component or device manufacturi – Process – Repairing – converting or salvaging
Patent
1994-12-27
1996-08-06
Bradley, P. Austin
Electric lamp or space discharge component or device manufacturi
Process
Repairing, converting or salvaging
445 3, 445 24, H01J 130, H01J 942, H01J 950
Patent
active
055428665
ABSTRACT:
A flat panel display having a repair capability, a process for repairing such a display having defects involving short circuits between a field emission tip and an adjacent conductor, and a process for forming a flat panel display with repair capability, are described. The flat panel display has a dielectric base substrate, upon which are formed cathode columns of parallel, spaced conductors. Gate lines, also formed of parallel, spaced conductors, are located over and perpendicular to the cathode columns. A dielectric layer is formed between the cathode columns and the gate lines. Pixels of the display are located at the intersections of the cathode columns and the gate lines. A plurality of openings are formed in the gate lines and in the dielectric layer, at each of the pixels. A plurality of field emission microtips, at each of the pixels, connects to and extends up from the cathode columns and into the openings. Slots in the gate lines are formed contiguously between the openings and parallel to the direction of the gate lines, whereby the slots provide a repair capability. The flat panel display is tested to detect the defect, located at an emitter location. The gate line is cut, preferably with a laser beam, on both sides of the emitter location, so that the cuts and slots electrically isolate the defective emitter from the rest of the gate line.
REFERENCES:
patent: 4650434 (1987-03-01), Deschamps et al.
patent: 5194780 (1993-03-01), Meyer
patent: 5260818 (1993-11-01), Wu
patent: 5482486 (1996-01-01), Vaudaine et al.
Ackerman Stephen B.
Bradley P. Austin
Industrial Technology Research Institute
Knapp Jeffrey T.
Saile George O.
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