Strengthened glass, touch panel and method of manufacturing strengthened glass

A method of manufacturing a strengthened glass, by which a large glass plate is separated to manufacture a plurality of strengthened glasses, comprising:

• a step of forming strengthening layers on both surfaces of the glass plate;
• a step of forming protection films in regions except for cutting portions of the glass plate on which the strengthening layers are formed;
• a step of forming recessed portions by etching both surfaces of the glass plate at the cutting portions of the glass plate not covered by the protection films;
• and
• a step of mechanically cutting the glass plate having the recessed portions formed thereon along the recessed portions, and forming a stepped portion at a periphery of the cut glass plate, the stepped portion having a protruding cutting surface.

A method of manufacturing a strengthened glass, by which a large glass plate is separated to manufacture a plurality of strengthened glasses, comprising:

• a step of forming strengthening layers on both surfaces of the glass plate;
• a step of mechanically cutting the glass plate having the strengthening layers formed thereon;
• a step of forming protection films in a region except for a periphery of the cut glass plate;
• and
• a step of forming a stepped portion by etching both surfaces of the glass plate at the periphery of the glass plate not covered by the protection films, the stepped portion having a protruding cutting surface.