Corning Incorporated
Ion-exchanged glass of high surface compression and shallow depth of layer with high resistance to radial crack formation from vickers indentation

Abstract:

Disclosed are alkali aluminosilicate glasses having unexpected resistance to indentation cracking. The glasses obtain this high resistance as a result of a high level of surface compression accompanied by a shallow depth of layer. The advantaged glasses show greater resistance to radial crack formation from Vickers indentation than glasses with the same compressive stress, but higher depths of layer.