An organic electroluminescent display device includes an anode electrode formed on a substrate; a buffer pattern formed under the anode electrode having a certain thickness; a pixel define layer for exposing a portion of the anode electrode; an organic thin film layer formed on the anode electrode; and a cathode electrode formed on the substrate. An upper surface of the pixel define layer is at least coplanar with or lower than that of the anode electrode. The thickness of the pixel define layer is at least substantially the same as or less than a sum of thicknesses of the anode electrode and the buffer pattern.

 
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