Organic electroluminescent display device, and method and system for making the same

A system for preparing an organic electroluminescent display device comprising a substrate, a shield member defining a gastight space with said substrate, and an organic electroluminescent multilayer structure disposed in said space, said space being filled substantially solely with an inert gas, said system comprising

• a layer forming section in which layers are successively formed on the substrate in distinct vacuum chambers by individual film forming processes appropriate for the respective layers, thereby forming the organic electroluminescent multilayer structure, and
• an assembling section connected to the layer forming section in a gastight manner in which the shield member is assembled to the substrate bearing the organic electroluminescent multilayer structure,
• wherein said assembling section includes a fore-chamber connecting said layer forming section to said assembling section in a gastight manner and a main working chamber in which an adhesive is applied to said shield member and/or said substrate bearing the organic electroluminescent multilayer structure, and said shield member and said substrate are joined together,
• at least said main working chamber is connected to a vacuum means and an inert gas source so as to establish an inert gas atmosphere having a water content of up to 100 ppm in said main working chamber where the joining operation is performed.