An inorganic layer 101 may be on the substrate 100 to reduce or block infiltration of impurities, moisture, or external air from a lower portion of the substrate 100, and to provide a flat surface on the substrate 100. The inorganic layer 101 may include an inorganic material such as an oxide material or a nitride material. A barrier layer (not shown) for preventing infiltration of external air may be further provided between the substrate 100 and the inorganic layer 101. The display device may include an opening pattern OP formed in the inorganic layer 101. For example, the inorganic layer 101 may include opening pattern OP that may be provided throughout the display area DA and the peripheral area PA. The opening pattern may correspond to the corner area CA. At least part of the inorganic layer 101 may be removed to correspond to the corner area CA.
A thin-film transistor TFT corresponding to the display area DA, a storage capacitor Cst, and a display device electrically connected to the thin-film transistor TFT and the storage capacitor Cst may be over the substrate 100. The thin-film transistor TFT of