Method of forming a glass layer onto a shadow mask
AssigneeU.S. Philips Corporation
InventorMaria C. Van Uden
Life of this patent
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Abstract
A color display tube comprises a shadow mask (12) placed in front of a display screen (8). The shadow mask (12), at least on the side remote from the display screen, is coated with a glass layer (14) comprising a heavy metal.
Claims2
A method of manufacturing a colour selection electrode for a color display tube, the colour selection electrode including a plate having apertures disposed through mutually generally parallel sides thereof, characterized in that the method comprises spraying a suspension including lead oxide and boron oxide on one side of the colour selection electrode while maintaining a sub-ambient pressure on the other side of the color selection electrode, and then heating the suspension sprayed on the one side of plate to form a glass layer.
Dependencies are inferred from the claim text.