Abstract: A color filter solution for applying on a face glass of a cathode ray tube and a method for patterning a color filter to improve the brightness and contrast characteristics of the color filter. The color filter solution comprises a pigment, an anion surfactant which contains sodium or ammonium ion or citric acid as a dispersion agent, a mixture solvent of a glycol and a pyrrolidone containing methyl or ethyl, a nonionic surfactant and a pure water. A method for patterning a color filter in a cathode ray tube comprises the steps of:preparing a color filter solution which comprises a pigment, an anion surfactant which contains sodium or ammonium ion or citric acid as a dispersion agent, a mixture solvent of a glycol and a pyrrolidone containing methyl or ethyl, and a nonionic surfactant;forming a photoresist slurry by adding an alcohol-sodium or ammonium dichromate to the color filter solution ; andcoating, exposing and developing the photoresist slurry on a face glass.

Abstract: A method for manufacturing a shadow mask including an electron reflection layer on the surface of the shadow mask on which electrons impact. The electron refection layer is formed by spray coating a composition including an inorganic binder and a bismuth ammonium citrate solution containing 10-50 wt % of bismuth, and heat treating the coated shadow mask. The method is simple in application and greatly reduces hole-blocking and thermal deformation of the shadow mask, improving color purity of a reproduced image and enhancing the quality of the image.

Abstract: A method for manufacturing a screen having high luminance is provided including the steps of forming a phosphor layer on a black matrix adhered to a panel, forming a filming layer by coating and drying a filming composition containing a decomposable organic polymer and a reducing agent on the phosphor layer, forming a metal layer on the filming layer, and heating the phosphor layer, filming layer and metal layer to a temperature sufficient to decompose the filming layer.