Glass article, method of producing glass article, and display device

A method of producing a glass article, the method comprising:

• forming glass;
• stacking the glass to create a stack of glasses;
• cutting the stack of glasses to separate it into individual glasses;
• first healing the glass;
• first cleaning the glass;
• strengthening the glass;
• second cleaning the glass;
• second healing the glass;
• and
• third cleaning the glass,
• wherein at least one selected from the first cleaning, the second cleaning and the third cleaning uses deionized water at a temperature in a range of 80° C. to 100° C.

A display device comprising:

• a display panel comprising a plurality of pixels;
• a cover window on the display panel;
• and
• an optically clear coupling layer between the display panel and the cover window,
• wherein a ratio of an intensity of hydrogen ions at a depth of 30 nm from a surface of the cover window to an intensity of hydrogen ions at the surface is equal to or greater than 1:4.