To prevent the expansion of a dark spot and the degradation of a light emitting characteristic even if an element is left under a high temperature- high humidity condition by providing a pedestal fixed with an organic electroluminescence element where as least are organic layer is formed substrate between a pair of electrodes formed on a substrate and a cap welded to the pedestal so as to cover the element.
An electron hole transport layer 3, a light emitting layer 4 and an Al/Li electrode as a cathode 5 are deposited in order on a material by performing a transparent ITO electrode on a glass substrate 1 as an anode, and are fixed to an electrode extraction part 7 arranged in the pedestal 6 by using conductive paste. A metallic cap 9 having a light taking-out window 8 and the pedestal 6 are welded and joined together. A light emitting characteristic before and after a test of this element changes, for example, from 3500 cd/m2 to 2800 cd/m2, and a dark spot diameter, from 20 μm to 25 μm, and an element having no metallic cap does not emit the light in 3600 cd/m2, and the dark spot diameter changed from 18 μm to 500 μm or more. Since the pedestal 6 and the cap 9 are joined together, infiltration of water is eliminated, and the exertion of damage on the element can be prevented.
SUZUKI MUTSUMI
Next Patent: ORGANIC EL DISPLAY AND MANUFACTURE THEREFOR