Etching a substrate: processes – Forming or treating optical article
Patent
1995-01-19
1996-11-26
Powell, William
Etching a substrate: processes
Forming or treating optical article
216 25, 216 76, B44C 122
Patent
active
055782256
ABSTRACT:
A field emission display that may be viewed through the back plate, thus providing increased luminous efficiency, and methods for making such a display, are described. A glass substrate is provided as a base for the display faceplate. There is a reflective, conductive layer over the glass substrate. A phosphor layer is formed over the reflective, conductive layer. A second glass substrate acts as a transparent base for the display baseplate, which is mounted opposite and parallel to the faceplate. A first transparent insulating layer is formed over the second glass substrate. There are parallel, transparent cathode electrodes with auxiliary metal electrodes, over the first insulating layer. Parallel, transparent gate electrodes are formed over, separate from, and orthogonally to the parallel, transparent cathode electrodes, and also have auxiliary metal electrodes. A second transparent insulating layer is between the gate electrodes and the cathode electrodes. A plurality of openings extend through the second insulating layer and the gate electrodes. At each opening is a field emission microtip connected to and extending up from a cathode electrode, whereby electrons may be selectively emitted from each microtip to form a display image on the faceplate phosphor layer, which is viewable through the baseplate.
REFERENCES:
patent: 5216324 (1993-06-01), Curtin
patent: 5461009 (1995-10-01), Huang et al.
patent: 5492234 (1996-02-01), Fox, III
"Improvement of Luminance And Luminous Efficiency of Surface-Discharge Color As PDP", By T. Shinoda et al, in SID 1991 Digest, pp. 724-727.
Ackerman Stephen B.
Industrial Technology Research Institute
Powell William
Saile George O.
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