Organic electroluminescent device and method for...

Stock material or miscellaneous articles – Composite – Of inorganic material

Reexamination Certificate

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C428S917000, C313S504000, C313S506000, C427S066000

Reexamination Certificate

active

07029767

ABSTRACT:
An organic EL device is disclosed which has a buffer structure that mitigates sputtering damage inflicted in the process of forming a transparent top electrode, that exhibits sufficient electrical conductivity and light transmissivity, and that exhibits high electron injection efficiency. An organic EL device according to the invention includes, sequentially disposed on a substrate, a bottom electrode, an organic EL layer including at least an organic light emissive layer, a buffer structure, and a transparent top electrode through which light is emitted. The buffer structure is a multilayer structure having two or more first type buffer layers containing a transparent material and two or more second type buffer layers containing a metal or an alloy, with each of the second type buffer layers being disposed on one of the first type buffer layers. A method for manufacturing such an organic EL device also is disclosed.

REFERENCES:
patent: 6551725 (2003-04-01), Raychaudhuri et al.
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patent: 1 278 244 (2002-07-01), None
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patent: 2002-75658 (2002-03-01), None
patent: 2002-260862 (2002-09-01), None
patent: P3366401 (2002-11-01), None
patent: WO 2004/049465 (2003-11-01), None
Tang, C.W. et al., “Organic electroluminescent diodes,” Appl. Phys. Lett. 51, pp. 913-915 (Sep. 21, 1987).

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