Light emitting diode display device and method of fabricating light emitting diode display device

A method of fabricating a light emitting diode (LED) display device, the method comprising:

• a) sequentially forming an undoped semiconductor layer, a first semiconductor material layer, an active material layer and a second semiconductor material layer on a growth substrate;
• b) forming a first insulating layer having a first concave portion on the second semiconductor material layer;
• c) sequentially forming a second active layer and a third semiconductor layer in the first concave portion on the second semiconductor material layer;
• d) after forming a second concave portion in the first insulating layer, sequentially forming a second active layer and a third semiconductor layer in the second concave portion on the second semiconductor material layer;
• e) forming a first semiconductor layer, a first active layer and a second semiconductor layer by patterning the first semiconductor material layer, the active material layer and the second semiconductor material layer;
• f) forming an insulating layer along an edge of the first semiconductor layer and the first active layer;
• g) forming a second pad electrode along an edge of the second semiconductor layer, a third pad electrode on the third semiconductor layer, and a fourth pad electrode on the fourth semiconductor layer over the insulating layer;
• h) removing the growth substrate and the undoped semiconductor layer;
• and
• i) forming a first pad electrode under the first semiconductor layer.