Display apparatus having treatment areas and method of manufacturing the same

A display apparatus comprising:

• a substrate including a first surface, a second surface, and a third surface, the first surface being parallel to a first direction and a second direction intersecting the first direction, the second surface being opposite to the first surface, and the third surface connecting the first surface to the second surface in a third direction intersecting the first direction and the second direction;
• a display portion arranged on the first surface of the substrate;
• a first treatment area including a first treatment surface, the first treatment surface being arranged on the third surface of the substrate and extending in the first direction;
• and
• a second treatment area including a second treatment surface, the second treatment surface being arranged on the third surface of the substrate, being connected to the first treatment surface in the first direction, and having a different surface shape from the first treatment surface,
• wherein,
• the second treatment surface includes a center treatment surface and a connection treatment surface that is closer to the first surface of the substrate than the center treatment surface, and
• an angle between the connection treatment surface and the first surface is greater than an angle between an extension line of the connection treatment surface and the first surface.