Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Patent
1979-04-06
1980-12-30
Silverberg, Sam
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
428 70, 4272552, 427 64, B44D 118, B44D 116
Patent
active
042423708
ABSTRACT:
Method of manufacturing thin film electroluminescent devices composed of a compound of zinc and sulphur, activated by a first metal activator consisting of copper and activated by a second metal consisting of copper manganese, excitable by direct and pulsed voltage. This method includes the steps of placing a substrate in an evacuated bell jar at the top portion thereof; placing in said bell jar first, second, third and fourth ovens respectively containing, in the form of elementary bodies, zinc, sulphur, the activator metal of copper and the activator metal of manganese, these ovens having apertures at the top portion thereof directed towards the substrate, for passage of the evapored elementary bodies; heating the substrate at a predetermined deposition temperature; simultaneously heating during a common period the ovens at respective first, second, third and fourth predetermined temperatures for causing the elementary bodies contained therein to be evaporated and deposited together on said substrate; heating the substrate at a predetermined recrystallization temperature and heating during an additional period the oven containing the element of group VI B alone at the recrystallization predetermined temperature.
REFERENCES:
patent: B381709 (1976-01-01), Lipp
patent: 2917442 (1959-12-01), Hanlet
patent: 3044902 (1962-07-01), Thornton
patent: 3113040 (1963-12-01), Winston
patent: 3889016 (1975-06-01), Valsenko
patent: 3894164 (1975-08-01), Dismukes
Abdalla Mohamed I.
Thomas Jacques A.
Saffitz Abraham A.
Silverberg Sam
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