Process for manufacturing a luminescent display screen that features a sloping structure

摘要

A process is described for the manufacture of a luminescent screen that eliminates image distorting or crosstalk effects resulting from secondary and back-scattered electrons that end up in adjoining sub- pixels. An unusually thick (ca. 70 microns) black matrix is first formed on the substrate surface and is given a tapered cross-sectional shape such that it is smaller at its top surface than at the substrate surface. Said tapered profile may be achieved through a screen-on process or by an overetching process. This is followed by the deposition of a transparent conductive layer, such as ITO, onto which the various layers of different phosphors that make up the sub-pixels of the display are deposited by means of electrophoresis.