| 摘要 |
<p>This invention relates to an improvement in a fluorescent display on which a desired image is displayed by applying in a vacuum electrons from a field electron emission element to a fluorescent layer, and more particularly to a structure of a fluorescent layer and method of forming the same, and a vacuum sealed structure, vacuum sealing method and vacuum level accelerating method for the space in the display. The fluorescent layer is formed out of a fluorescent body and glass of a low melting point serving as a bonding agent thereof. A method of forming the fluorescent layer consists of the steps of applying paste, which is composed of a mixture of, for example, powder of a fluorescent material, powder of glass of a low melting point and a binder, to a substrate, and baking the substrate at a temperature not lower than the melting point of the glass referred to above. Solder is used as a sealing means for the space in the display, and a sealing method therefor consists, for example, of the steps of placing a display body with its discharge port facing downward on a stand in a vacuum chamber, and thermally melting spherical solder, which is placed between the stand and the discharge port, so as to pack the solder in the discharge port. To obtain a means for increasing a vacuum level, thin film of getter material is formed on the inner surface of the above-mentioned space. The air in this space is removed and the space is sealed, a laser beam being then applied to the getter material to evaporation-revive the same. <IMAGE></p> |
