ORGANIC EL ELEMENT, ORGANIC EL DISPLAY DEVICE, AND ITS MANUFACTURING METHOD

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PROBLEM TO BE SOLVED : To obtain an organic EL display device with a large area by using materials that are different from an Li for cathode forming. SOLUTION : In an organic EL element having a transparent conductive electrode and a cathode opposed to the transparent conductive electrode, the cathode includes a film of a rare earth element that can be sputtered. The film of the rare earth element having a low work function, for example, a LaB6 film, can be formed uniformly over a wide area on an electron injection layer by a rotary magnet sputtering apparatus. COPYRIGHT : (C)2009, JPO&INPIT