Patent ID: 11919803
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G  Y | IPC C  G

Claim 14:
15. An article comprising:
a glass substrate having opposing major surfaces and having a first average strain-to-failure;
a crack mitigating layer disposed on a first major surface of the glass substrate forming a first interface; and
a film disposed on the crack mitigating layer forming a second interface, the film having a second average strain-to-failure that is lower than the first average strain-to-failure,
wherein a load required for a crack originating in the film to bridge across the first interface is greater than a load required for the crack to bridge across the second interface,
wherein the film comprises an anti-reflection (AR) film, the AR film a layered structure comprising one or more of SiO2, TiO2 and Nb2O5, and
wherein the crack mitigating layer has a thickness in the range from about 35 nm to about 80 nm and the film has a thickness of less than about 5 μm.