Display device and method for fabricating the same

A display device comprising:

• a substrate;
• at least one switching element on the substrate;
• a pixel electrode connected to the at least one switching element;
• a semiconductor layer on the substrate, the semiconductor layer providing a channel area of the at least one switching element;
• and
• an insulating layer on the semiconductor layer, the insulating layer having a groove overlapping the semiconductor layer,
• wherein the groove has a closed-loop shape, and
• the insulating layer comprises:
• a first insulating layer on the semiconductor layer, the first insulating layer having a dummy hole overlapping the groove;
• and
• a second insulating layer in the dummy hole and on the first insulating layer, the second insulating layer having a groove which is smaller than the dummy hole.

A method of manufacturing a display device, the method comprising:

• forming a semiconductor layer on a substrate;
• forming a gate insulating layer on the semiconductor layer;
• forming a gate electrode on the gate insulating layer to overlap the semiconductor layer;
• forming a first insulating layer on the gate electrode and the gate insulating layer;
• forming a dummy hole in the first insulating layer, the dummy hole exposing the semiconductor layer;
• releasing hydrogen of the semiconductor layer through the dummy hole;
• and
• forming a second insulating layer in the dummy hole and on the first insulating layer.