Curved transparent substrate including an alkali-free substrate, curved display panel including the same and method of manufacturing the same

A curved display panel comprising:

• a first substrate including a curved transparent substrate, a switching element arranged at the curved transparent substrate and a pixel electrode connected to the switching element;
• a second substrate opposite to the first substrate;
• and
• a liquid crystal layer disposed between the first and second substrates,
• wherein the curved transparent substrate includes an alkali-free base layer having a curved shape and a compression applying layer adjacent to a surface of the alkali-free base layer, and
• wherein an alkali ion content of the compression applying layer is greater than an alkali ion content of the alkali-free base layer,
• the compression applying layer includes aluminosilicate, and a ratio of alkali metal oxide to aluminum oxide of the compression applying layer is within a range of about 0.5 to about 1.5.