Abstract A method of making a direct-current electroluminescent device in which an electroluminescent film is deposited onto a heated substrate coated with an optically transparent electrode by means of vacuum evaporation of a first substance comprising zinc sulphide doped with Mn, Cu and Cl and a second substance comprising metallic zinc in a quasi-closed volume, both substances being evaporated simultaneously and each substance being evaporated from a separate evaporator. The temperature of the evaporator containing the first substance comprising zinc sulphide doped with Mn, Cu and Cl is maintained within a range enabling the first substance to evaporate at a specified rate, while the temperature of the separate evaporator containing the second substance of metallic zinc is maintained within a range enabling the second substance to evaporate at a specified rate, thereby enabling the desired concentration of zinc to be deposited onto said film. A metal electrode is deposited onto the obtained film by means of vacuum evaporation.
Inventors
👤 Natalya Andreevna Vlasenko
👤 Alla Nikolaevna Gergel
👤 Andrei Antonovich Shkola
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-29 13:42
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A method of making a direct-current electroluminescent device, in which an electroluminescent film is deposited onto a heated substrate covered with an optically transparent electrode, comprising vacuum evaporating zinc sulphide doped with manganese, copper, and chlorine from a first evaporator at a temperature between 1,050*C-1,250*C and simultaneously vacuum evaporating metallic zinc from a second evaporator at a temperature between 360*C-400*C, thereby enabling the desired concentration of zinc to be obtained in said film; and vacuum evaporating a metal onto said film to form an electrode on said film.
Claim 2
Independent Claim
88 words
A method of making a direct-current electroluminescent device, in which an electroluminescent film is deposited onto a heated substrate covered with an optically transparent electrode, comprising vacuum evaporating zinc sulphide doped with manganese, copper, and chlorine from a first evaporator at a temperature between 1,050*C-1,250*C and simultaneously vacuum evaporating metallic zinc from a second evaporator at a temperature between 360*C-400*C, thereby enabling the desired concentration of zinc to be obtained in said film; and vacuum evaporating a metal onto said film to form an electrode on said film.
Claim 3
Dependent Claim
65 words
A method of making a direct-current electroluminescent device according to claim 2, wherein said first and second substances are evaporated in separate evaporators contained in a quasi-closed volume having said substrate at the upper end thereof and said evaporators at the lower end thereof, thereby enabling an excess of zinc of a predetermined concentration to be uniformly distributed throughout the entire thickness of said film.
Claim 4
Dependent Claim
22 words
A method of making a direct-current electroluminescent device according to claim 3, wherein the temperature of said substrate is maintained between 250*-300*C.