| 摘要 |
PURPOSE:To achieve improved adhesion so as to increase the emission life characteristic of a cathode-ray tube by using a material containing both a heat-ray-absorbing matter and organic ammonium to form a heat-ray-absorbing layer on the surface of a metal back layer located on a phosphor layer. CONSTITUTION:First, the inner surface of a panel 1 is coated with a phosphor layer 2 which consists of red, green and blue phosphor stripes 21 and black stripes 22 located between the stripes 21. Next, the surface of the phosphor layer 2 is coated with a metal back layer 31 and a heat-ray-absorbing layer 32 in that order, thereby making a color cathode-ray tube. The heat-ray- absorbing layer 32 is formed on the metal back layer 31 by heating the layer 31 and then spraying over it a solution which is prepared by adding an amount (corresponding to at least 0.5wt% of the solid component of the heat-ray- absorbing layer 32) of an aqueous solution of an organic ammonium silicate such as SiO2-choline to a liquid suspension of a heat-ray-absorbing matter such as graphite. As a result, improved adhesion is achieved and the separation of particles is prevented, thereby increasing the withstand voltage and the emission life characteristics of the cathode-ray tube.
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