| 摘要 |
PROBLEM TO BE SOLVED: To provide a plasma display panel back plate which is superior in emission luminance, free of color difference, and having high hue precision by setting the content of an alkali metal or alkali earth metal on the surface to a specified value or less. SOLUTION: The content of an alkali metal or alkali earth metal on the surface of a substrate is set to 2 wt.% or less. The substrate is manufactured by providing a pattern consisting of a barrier rib material prior to baking, and performing an acid treatment. As the barrier rib material, for example, a mixture of an organic polymer binder, a hardener having a functional group such as vinyl group, an organic solvent, an inorganic pigment, and an inorganic binder is included. The barrier rib material is patterned on the substrate by means of screen printing and baked. Examples of the acid used for the acid treatment include an organic acid such as formic acid, an inorganic acid such as sulfuric acid and the like. The acid treatment is performed by the use of these acids as they are or using a solution of the acid dissolved in a suitable solvent such as water. In this case, the acid concentration is desirably set to 0.1-50 wt.%. |
