| 摘要 |
A method for making a color cathode ray tube utilizing a screen-related apertured mask member wherein the apertures are temporarily reduced in size by an applied coating that is absorbent of actinic radiant energy. The coated mask is used to photo expose a windowed-web, defined by opaque interstices, on the viewing panel of the tube; whereupon, the coated mask is again employed to photo expose a superimposed array of phosphor dots to fully cover each of the window areas. After formation of the screen structure the temporary coating is removed from the mask by treating with a dissolving solution which completely de-coats the mask thereby restoring the apertures to their initial dimensioning without harming the underlying mask material per se. In the mask-screen assembly thus fabricated, the mask apertures in the completed tube are of a size larger than the associated phosphor-filled window areas of the screen.
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