Color cathode ray tube having at least one kind of fluorescent substance film consisting of fluorescent substance particles having wave length selective layer and method of producing the same

A color cathode ray tube comprises black matrix films (31) formed on an inner surface of a glass panel (29) with a predetermined positional relation and has a plurality of light transmission window portions (33, 35, 37), and fluorescent substance films (55) formed by fluorescent substance particles (39, 41, 43) of green, blue and red at the light transmission windows portions. In the color cathode ray tube, the fluorescent substance films have a wave length selective layer (45, 47) partly coated on a surface of at least one kind of the fluorescent substance particles of green, blue and red. Each of the fluorescent substance films has a wave length selective characteristic. Further, a method of producing the color cathode ray tube comprises a step of forming black matrix films (31) formed on an inner surface of the glass panel (29) with a predetermined positional relation. The black matrix films have the light transmission window portions (33, 35, 37). The method further comprises a step of forming the fluorescent substance films formed by fluorescent substance particles (39, 41, 43) of green, blue and red at the light transmission window portions in order to produce this color cathode ray tube. In the method, the fluorescent substance films use at least one kind of the fluorescent substance particles of green, blue and red. The surface of at least one kind of the fluorescent substance particles is partly coated with the wave length selective layer (45, 47) having a wave length selective characteristic, respectively.