| 摘要 |
PURPOSE:To improve adsorptive capacity while making it possible to increase a quantity of getter by arranging ring-shaped getter and a shielding material made of steel wool formed so as to surround it in the space of a vacuum container inside wall and the back of an electrode structure. CONSTITUTION:High frequency heating type ring-shaped getter 12, which is an alloy of barium and aluminuim with added nickel powder, is set up in the space A formed by an inside wall of a vacuum container 6 and the back of an electrode structure 7 in a plate type image display device while continuously arranging a shielding material 13 made of steel wool so as to surround it. And while forming a vacuum-evaporated thin film on the inside wall of the container 6, the back of the electrode structure 7 and the surface of the shielding material 13 by heating of the getter 12, creeping of barium inside the electrode structure 7 is prevented by the shielding material 13. Accordingly, the inside of the container 6 can be maintained vacuum over a long time by sharply magnifying an area of the vacuum evaporation thin film. |
