| 摘要 |
PURPOSE:To prevent any defective such as a crack or the like on a metalized film from occurring by installing a process which coats the metalized film on an outer surface of a glass bulb after a binder burning-dissipation process and a sealing process for the phosphor coat coated to an inner surface of the glass bulb. CONSTITUTION:A phosphor coat 2 is clad to an inner surface of a glass bulb 1. In succession, the bulb 1 is heated and baked and a binder is burned in dissipation. At time, a metalized film is not yet coated on an outer surface of the bulb 1. Next, a flare of a stem of the mount attached with a discharge electrode is sealed to an end of the bulb 1. Successively, an exhaust tube of the stem is connected to an exhaust system and the bulb 1 is heated and exhausted while degassing, then decomposition of the discharge electrode, mercury dropping, sealing of easily dischargeable gas and exhaust operation for the exhaust tube or the like are all performed. At the next process, a metalized film 5 of stainless steel or the like is deposited to the outer surface of the bulb 1, and furthermore a protective coat of silicon dioxide is deposited by evaporation. Thus, any defective such as a crack or the like on the metalized film 5 is preventable from occurring.
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