Light-emitting device having electrode formed by laminate of...

Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure

Reexamination Certificate

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C257S099000, C257S103000, C313S506000, C313S504000

Reexamination Certificate

active

07045822

ABSTRACT:
The present invention provides an organic light-emitting element where a lower electrode, an organic compound layer and an upper electrode are laminated on a substrate, wherein the upper electrode of the organic EL element is formed by a laminate of at least a conductive first inorganic film, a conductive organic film and a conductive second inorganic film, in order to suppress the occurrence of dark spot, so that the occurrence of pinholes in the upper electrode leading to dark spots is suppressed. Here, pinholes refer to holes in the upper electrode that penetrate upper electrode from the organic compound layer underneath to the atmosphere above.

REFERENCES:
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patent: WO 01/99207 (2001-12-01), None
International search report for international application No. PCT/JP03/16166, mailed Feb. 3, 2004.
English translation of Opinion filed in international application No. PCT/JP03/16166, dated Mar. 9, 2004.
Kawaharada, M. et al, “Nuclei of Dark Spots in Organic EL Devices: Detection by DFM and Observation of the Microstructure by TEM,” Synthetic Metals, vol. 91, pp. 113-116 (1997).
Liew, Y.F. et al, “Investigation of the Sites of Dark Spots in Organic Light-Emitting Devices,” Applied Physics Letters, vol. 77, No. 17, pp. 2650-2652, Oct. 23, (2000).

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