Organic EL display device with arrangement to suppress...

Details Organic EL display device with arrangement to suppress... Organic EL display device with arrangement to suppress...

2006-04-25

2006-04-25

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S503000, C313S506000, C313S509000

Reexamination Certificate

active

07034453

ABSTRACT:
In an organic EL display device comprising a substrate, a plurality of pixel regions in each of which a first electrode, a light emitting material layer, and a second electrode are laminated in this order above the substrate, and a bank film formed above the substrate to separate respective one of the pixel regions from another of the pixel regions adjacent thereto, wherein the bank film has a plurality of openings exposing upper surfaces of the first electrodes to the light emitting material layers in the respective pixel regions, and the second electrode is formed over the a plurality of openings of the bank film in common with the pixel regions, the present invention forms the bank film of an inorganic material and shapes a side wall thereof lying around each of the openings thereof to be sloped at an angle less than 85 degrees (°) with respect to a principal surface of the substrate in order to prevent the deterioration of the light emitting material layer and disconnection of the second electrode at steps of bank film lying in the vicinity of the openings thereof.

REFERENCES:
patent: 6844672 (2005-01-01), Yamazaki
patent: 6888304 (2005-05-01), Sato
patent: 2003/0080338 (2003-05-01), Yamazaki et al.
patent: 2004/0195964 (2004-10-01), Yamazaki et al.

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