| 摘要 |
PURPOSE:To prevent chromatic purity from being deteriorated due to residue of unnecessary portions of a fluorescent material by pre-coating a glass panel with a polyvinyl alcohol solution including a diazonium salt, and forming fluores cent patterns of respective colors in succession on said glass panel. CONSTITUTION:An optical absorption layer 2 comprising carbon coating is formed stripe-shaped on the inner surface of a glass panel 1 of a color CRT, on which layer a polyvinyl alcohol solution containing a diazonium salt as a photosensitive agent is applied and hardened for forming a pre-coat 3. Thereafter, a green fluorescent slurry 4 is applied on the pre-coat 3 with an ordinary method, exposed, and developed for forming a green fluorescent pattern and for forming fluorescent patterns of the colors after removing unnecessary portions from the fluorescent material. Thus, chromatic purity can be prevented from being produced due to residual substances of unnecessary portions and a residue of chromium of the fluorescent material. |
