| 摘要 |
PURPOSE:To obtain a uniform metal backing layer with no unevenness by forming an organic high-molecular substance thin film after wetting the inside of a phosphor layer with a dilluted water solution of an alkaline metal hydroxide. CONSTITUTION:After applying a phosphor to the inside of a bulb panel, for instance, a phosphor layer is wetted with 0.01wt% of a potassium hydroxide water solution with a spray followed by applying a toluene solution of acryl resin with the spray while being dried for forming a thin film of an organic high-molecular substance. Thereafter, an alminium metal backing layer is formed on said thin film by means of vacuum evaporation for being given firing treatment. Thereby, a phosphor film quality level is improved while moreover sharply decreasing inferiority due to uneven brightness and sharply improving an yield in mass production. |
