Method of manufacturing a plurality of relatively matched masks used in the production of phosphor screens
Abstract
Abstract A METHOD OF MAKING MATCHED MASKS EACH CONSISTING OF A GLASS CARRIER PROVIDED WITH PORTIONS PREVIOUS TO RADIATION WHICH ARE USED IN THE MANUFACTURE OF A LUMINESCENT DISPLAY SCREEN FOR A CATHODE RAY TUBE FOR COLOR DISPLAY. THIS SCREEN COMPRISES AT LEAST TWO SETS OF STRIPLIKE SURFACES WHICH LUMINESCE UNDER ELECTRON IMPACT WITH DIFFERENT COLORS AND ARE SEPARATED BY NONLUMINESCING LIGHT IMPERVIOUS STRIPS AND STRIPS WHICH PRODUCE AN INDEX SIGNAL UPON ELECTRON EXCITATION. THESE MASKS ARE MANUFACTURED BY FIRST EXPOSING A PHOTOSENSITIVE LAYER THROUGH AN AUXILIARY MASK TO FORM A NEGATIVE CORRESPONDING TO ONE SET OF STRIPS AND REPEATING THIS PROCEDURE TO FORM A NEGATIVE FOR EACH SET OF STRIPS AND THEREAFTER EXPOSING A PHOTOSENSITIVE LAYER THROUGH ONE OF THE NEGATIVES TO FORM A MASK CORRESPONDING TO ONE SET OF STRIPS AND REPEATING THE PROCEDURE TO FORM A MASK FOR EACH SET OF STRIPS.
Inventors
- 👤 Johannes Josephus Anto Jonkers
Bibliographic Details
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