Patent ID: 6325901
Filing Date: 2001-12-04
Classification: C03C,C23C,H01J

Abstract:
A method of manufacturing a cathode ray tube, comprising:providing a vacuum film forming apparatus including:a chamber having an upper open end, a first exhaust port, and a second exhaust port, the first and second exhaust ports having valves connected thereto and arranged below the upper open end,a gate valve positioned between the first and second exhaust ports,a hermetic sealing device arranged on a side of at least the upper open end of said chamber, anda film-forming device arranged within said chamber;closing said gate valve to partition said chamber into a first region having the upper open end and the first exhaust port, and a second region having the second exhaust port;evacuating the second region of said chamber through the second port;mounting a faceplate of a cathode ray tube on said upper open end of said chamber through said hermetic sealing device, said faceplate of said cathode ray tube being downwardly arranged,evacuating the first region of said chamber to a vacuum state through the first port;opening said gate valve;forming a thin film on said faceplate by using said film forming device;closing said gate valve;opening said gate valve connected to the first exhaust port to break the vacuum state within the first region of said chamber,unloading said cathode ray tube from said chamber; andmounting an additional faceplate of another cathode ray tube on said upper open end of said chamber through said hermetic sealing device, said additional faceplate being downwardly arranged; andrepeating said evacuating the first region, said opening said gate valve, said forming a thin film on said face plate, said closing said gate valve, said opening said gate valve connected to the first exhaust port, and said unloading said cathode ray tube from said chamber.