STRENGTHENED GLASS AND DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a strengthened glass having high end surface strength although scribe-cutting is performed after strengthening treatment.SOLUTION: The strengthened glass having a compressive stress layer on the surface is subjected to scribe-cut after strengthening treatment and has the whole or a part of the cut surface without physical processing or etching. The thickness of the compressive stress layer on the strengthened glass surface is 1.0 mm or less. A glass composition represented by mass% includes 40-71% of SiO, 7-23% of AlO, 0-1% of LiO, 7-20% of NaO and 0-15% of KO.