Patent ID: 7888864

Claim:
An electroluminescent device comprising: a substrate; a support layer having a plurality of recesses and being disposed on the substrate; a light emissive structure on the substrate, the light emissive structure comprising organic light emissive material disposed between first and second electrode layers for supplying charge carriers into the organic light emissive material to cause it to emit light, and the first and second electrode layers respectively underlying and overlying the organic light emissive material in a first recess of the plurality of recesses; and an electrically conductive region underlying the light emissive structure in a second recess of the plurality of recesses, the second electrode layer and the organic light emissive material extending to the second recess, wherein the electrically conductive region is formed with electrically conductive protuberances which extend through the thickness of the organic light emissive material, the second electrode layer is electrically connected to the electrically conductive protuberances, and the organic light emissive material partially covers the electrically conductive protuberances.