Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2006-11-07
2006-11-07
Patel, Ashok (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S506000, C428S917000
Reexamination Certificate
active
07132790
ABSTRACT:
Provided is a means for improving the capability of injecting electrons from a cathode in a luminous element and solving problems about the production process thereof. In the present invention, a material having a smaller work function than a cathode material is used to form an inorganic conductive layer between the cathode and an organic compound layer. In this way, the capability of injecting electrons from the cathode can be improved. Furthermore, the film thereof can be thicker than that of a conventional cathode buffer layer formed by using an insulating material. Therefore, the film thickness can easily be controlled, and a decrease in production costs and an improvement in yield can be achieved.
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English Translation of Official Communication, Taiwanese Patent Office, Taiwanese Patent Application No. 745787, Aug. 13, 2003.
Imai Keitaro
Seo Satoshi
Patel Ashok
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Semiconductor Energy Laboratory Co,. Ltd.
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