| 摘要 |
PURPOSE:To make up a high quality vapor coating film with high reflectivity by forming an vapor coating film on a fluorescent screen at a low vacuum by rotating a vapor coating source at the time other than doing necessary vacuum vapor coating. CONSTITUTION:At the time when a glass face plate 1 is conveyed into an aluminum vapor coating chamber 6b, a heating surface 7a of a resistance heat element 7 is turned toward the direction not facing to the fluorescent screen of the plat 1. Therefore, even if the remaining aluminum molten liquid is vaporized it does not vaporized toward the fluorescent screen. When the vacuum of the vapor coating chamber 6b becomes high and approaches to a vaporization starting value a high level voltage is applied to the resistance heat element 7 and its heating surface 7A is turned to the condition to face the fluorescent screen and vapor coating is carried out under a high vacuum for a predetermined hours. When the vapor coating is completed the voltage applied to the heat element 7A is lowered, the supply of an aluminum wire is stopped, and the heat element 7A is rotated to return to the original condition. By these operations a high quality vapor coating film with high reflectivity is formed. |
