| 摘要 |
PURPOSE:To improve a life characteristics as well as a special performance by coating the metal-backed surface on a screen having the metal-backed inside with a carbon layer of a low photoreflection factor. CONSTITUTION:A black carbon film 23 is formed in thickness of, for instance, some 100Angstrom calculated in a dense film on the phosphor screen surface in which a phosphor layer 22 is formed by depositing phosphors on a glass face plate 21. Carbon is deposited by using an argon atmosphere as the atmosphere in which a phosphor plate is to be arranged. This alone does not suffice for the adhesive strength so that the treatment for condensing grains of the layer is performed by exposing to the gas atmosphere of a volatile substance such as acetone or alcohol after deposition in order to increase the adhesive strength. Thereby, the deterioration of the photosensitivity during the operation can be remarkably reduced while improving a life characteristic as an image tube as well as a special performance. |
