Corning Incorporated
Ion exchangeable glass with deep compressive layer and high damage threshold

Abstract:

Glasses comprising SiO.sub.2, Al.sub.2O.sub.3, and P.sub.2O.sub.5 that are capable of chemical strengthened by ion exchange and having high damage resistance. These phosphate-containing glasses have a structure in which silica (SiO.sub.2) is replaced by aluminum phosphate (AlPO.sub.4) and/or boron phosphate (BPO.sub.4).