Robinson Intellectual Property Law Office, P.C.
Luminescent device having thin film transistor
In the case where a material containing an alkaline metal or an alkaline-earth metal in a cathode, an anode, a buffer layer, or an organic compound layer is used, there is a fear of the diffusion of an impurity ion (representatively, alkaline metal ion or alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. As the insulating films 117, 317 and 417 provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion but also aggressively absorbing an impurity ion, for example, a silicon nitride film containing a large amount of fluorine, a silicon oxynitride film containing a large amount of fluorine or an organic resin film containing a particle having an antimony (Sb) compound, a tin (Sn) compound, or an indium (In) compound is used.
Semiconductor Energy Laboratory Co., Ltd.
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Taketomi Satoshi Mitsuhiro
Asami Murakami Ichijo