Display device, flexible display device, and method of manufacturing display device

A flexible display device foldable with respect to a bending line, comprising:

• a display area and a non-display area surrounding at least a portion of the display area;
• a substrate layer including a first substrate defining a first hole therein, a second substrate disposed on a rear surface of the first substrate, and an organic layer of which at least a portion is disposed in the first hole;
• and
• a display layer disposed on the substrate layer and including a light emitting element disposed in the display area,
• wherein the organic layer overlaps the bending line in a plan view,
• the first substrate and the second substrate overlap in the non-display area in the plan view, and
• ends of the first substrate and the second substrate are spaced apart from each other to form a second hole.

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

• disposing a display layer on a first surface of a substrate including the first surface and a second surface opposite to the first surface;
• forming a hole passing through the substrate by performing wet etching on at least a portion of the substrate in a direction from the second surface toward the first surface;
• and
• disposing an organic layer in the hole.