PURPOSE: To form a uniform inter-layer film with ease and obtain a color phosphor screen without uneven luminance by forming phosphor layers of plural colors then washing the phosphor layers in warm water and forming an inter- layer film thereafter.

CONSTITUTION: Carbon stripes 11 with a specified pattern are formed on the inner surface of a panel 1, followed by application thereto of green phosphor slurry. And, the carbon strips 11 are subjected to exposure and development process after being dried to form a green phosphor stripes 2G in the spaces between the specified carbon stripes 11. Then, in the same manner, blue phosphor stripes 2B and red phosphor stripes 2R are formed in succession. After drying the respective phosphor stripes 2G, 2B and 2R, warm water 12 is injected into the panel 1 to wash them in the warm water. After subsequent drying, primal liquid 3 is applied to form an inter-layer film 4, followed by the formation of a metal-backed layer 13. In this way, an uniform inter-layer film 4 can be formed easily. Accordingly, subsequent formation of the metal-backed layer 13 can be done uniformly across all sections, enabling to obtain a color phosphor screen without uneven luminance.