Patent ID: 6165657
Filing Date: 2000-12-26
Classification: H01J

Abstract:
A method of electrophotographically manufacturing a luminescent screen on an inner surface of a faceplate panel for a CRT, comprising:(a) coating the inner surface of the panel with a volatilizable conductive layer;(b) coating the volatilizable conductive layer with a volatilizable photoconductive layer;(c) establishing a uniform electrostatic charge over the whole area of the inner surface of the photoconductive layer;(d) exposing selected areas of the photoconductive layer for later developing one of first to third color-emitting phosphor particles, to a light source through a shadow mask to discharge the charge from the selected areas of the photoconductive layer through the conductive layer;(e) removing the shadow mask;(f) developing the discharged selected areas with pigment particles;(g) fixing the pigment particles to the photoconductive layer to form a filter layer of the pigment particles before developing the one of the first to third developed color-emitting phosphor particles over the filter layer;(h) establishing a second uniform electrostatic charge over the whole area of the inner surface of the photoconductive layer on which the filter layer of step (g) is fixed;(i) again exposing the selected areas of the photoconductive layer to a light source through the shadow mask to discharge the charge from the selected areas of the photoconductive layer;(j) again removing the shadow mask; and(k) developing the discharged selected areas with the one of the first to third color-emitting phosphor particles.