Electroluminescent display device and method of manufacturing the same

A method of manufacturing an electroluminescent display device, comprising:

• forming a first auxiliary electrode over a substrate;
• forming a first insulation layer having a first contact hole and a second insulation layer having a second contact hole over the first auxiliary electrode;
• and
• forming a light-emitting diode over the second insulation layer, the light-emitting diode including a first electrode, a light-emitting layer, and a second electrode,
• wherein forming the first insulation layer having the first contact hole and the second insulation layer having the second contact hole includes forming an undercut structure where a bottom surface of the second insulation layer is exposed at at least one side of the second contact hole,
• wherein each of the first and second contact holes includes a portion extending in a first direction and a portion extending in a second direction, and
• wherein the light-emitting layer is cut off by the undercut structure, and the second electrode is connected to the first auxiliary electrode under the undercut structure.