GRID THIN PLATE OF COLOR DISCRIMINATING ELECTRODE, COLOR DISCRIMINATING ELECTRODE, CATHODE RAY TUBE, AND MANUFACTURING METHOD THEREOF

PROBLEM TO BE SOLVED: To provide a grid thin plate of color discriminating electrode, a color discriminating electrode, a cathode ray tube, and manufacturing method thereof wherein the tape material of a grid thin plate is prevented from being thermally deformed under stress relaxation in a thermal process, to eliminate irregularity in brightness for improved picture quality. SOLUTION: There are provided a grid thin plate 2 of a color discriminating electrode wherein multiple lines of slits 6, in stripe, are formed on a metal thin plate, with multiple lines of tapes 7 provided among the slits 6, and an oxide film of dark brown is formed on the surface of the thin plate by an oxidizing process other than a thermal process, plating, or a kind of painting, a color discriminating electrode 1 in which the grid thin plate 2 is bridged on a square frame 5 under a prescribed tensile, and a cathode ray tube comprising the color discriminating electrode 1.