Electroluminescence phosphor multilayer thin film and...

Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type

Reexamination Certificate

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C313S503000, C252S30140R

Reexamination Certificate

active

06876146

ABSTRACT:
The present invention aims at realizing a phosphor thin film having a high luminance with a low emission threshold voltage, and an EL element comprising the same. The EL element of the present invention comprises a substrate, and a lower electrode, a lower buffer thin film containing a sulfide such as ZnS, a phosphor thin film containing an oxide such as a gallate as a matrix material, an upper buffer thin film containing a sulfide such as ZnS, and an upper electrode which are successively laminated on the substrate.

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Tadatsugu Minami; “Oxide Phosphor Thin-Film Electroluminescent Devices”; Display and Imaging; 1999; vol. 8; pp 83-93.
Michitaka Ohura et al.; “Properties of Red-Color CaS:Eu Thin Film El Device”; ITEJ Technical Report; Nov. 27, 1992; vol. 16, No. 76; pp 7-11.

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