Display device and manufacturing method thereof

A display device comprising:

• a display panel in which a display region and a pad region are defined, the display panel including:
• a base substrate;
• a pixel disposed on the base substrate and disposed in the display region;
• a pad disposed on the base substrate, disposed in the pad region, and including a first surface and a plurality of second surfaces connected to the first surface;
• a protective layer which covers the pad and in which an opening which exposes a first upper surface portion of the first surface is defined;
• and
• an encapsulation layer which covers the pixel,
• wherein a first thickness of a first portion of the protective layer which covers a second upper surface portion of the first surface of the pad adjacent to the first upper surface portion of the first surface of the pad is greater than a second thickness of a second portion of the protective layer which covers the plurality of second surfaces of the pad,
• the first thickness is measured in a direction parallel to a direction perpendicular to the first surface, and
• the second thickness is measured in a direction parallel to a direction perpendicular to a second surface, contacting the second portion, among the plurality of second surfaces.