Method for manufacturing ultra-thin glass, ultra-thin glass, and display device including the ultra-thin glass

A method for manufacturing ultra-thin glass, the method comprising:

• patterning a plurality of display cells on a first glass substrate;
• patterning a dummy area adjacent to the display cells on the first glass substrate;
• forming a plurality of cutting lines, including each of the plurality of cutting lines defining each of the plurality of display cells, each of the plurality of cutting lines having a closed-loop shape surrounding each of the plurality of display cells and the plurality of cutting lines comprising a plurality of patterns arranged in the closed-loop shape and spaced apart from each other;
• forming a protective film on the first glass substrate;
• forming a plurality of through-holes at the plurality of patterns of the plurality of cutting lines, including forming a plurality of bridges between the plurality of through-holes, each of the plurality of bridges including a glass member that extends from one through hole to another through hole of the plurality of through holes;
• and
• cutting the plurality of bridges, including separating each of the plurality of display cells from each other and forming portions of the plurality of bridges that protrude from at least one side of each of the plurality of display cells.