Corning Incorporated
Glass-based articles having improved fracture performance

Abstract:

Glass-based articles article are described and have a first surface and a second surface opposing the first surface defining a thickness (t) (mm); and a compressive stress (CS) layer containing ion-exchanged potassium and ion-exchanged silver or ion-exchanged potassium and ion-exchanged copper, the CS layer extending from the first surface to a depth of compress (DOC), wherein the DOC is in a range of 0.1t and 0.3t, the CS at the first surface in a range of 300 MPa and 1500 MPa and defining a compressive stress profile including a spike region, a tail region and a knee region between the spike region and the tail region, wherein all points of the stress profile in the spike region comprise a tangent having a value that is in a range of -15 MPa/micrometer and -200 MPa/micrometer and all points in the tail region comprise a tangent having a value that is in a range of -0.01 MPa/micrometer and -3 MPa/micrometer.