Ion exchanged glass with high resistance to sharp contact failure and articles made therefrom
AssigneeCorning Incorporated
InventorTimothy Michael Gross
Life of this patent
Estimating the term…
Abstract
An article comprising an ion-exchanged glass material that prevents sharp contact flaws from entering a central region of the material that is under central tension and thus causing failure of the material. The glass material may be a glass or glass ceramic having a surface layer under compression. In some embodiments, the depth of the compressive layer is greater than about 75 μm. The greater depth of layer prevents flaws from penetrating the compressive layer to the region under tension.
Claims24
An article comprising a glass material, the glass material having a thickness of less than 1.5 mm, a compressive layer extending from a surface of the glass material to a depth of layer of at least 75 microns, wherein the compressive layer is under a compressive stress of at least 250 MPa, and wherein the glass material is a glass ceramic comprising a silicate glassy phase and a ceramic phase.
An article comprising a glass material, the glass material having a thickness of less than 1.5 mm, a compressive layer extending from a surface of the glass material to a depth of layer of at least 75 microns, wherein the compressive layer is under a compressive stress of at least 250 MPa, wherein the glass material is a glass ceramic comprising a silicate glassy phase and a ceramic phase, and wherein the ceramic phase comprises β-spodumene.
An article comprising a glass material, the glass material having a thickness of less than 1.5 mm, a compressive layer extending from a surface of the glass material to a depth of layer of at least 75 microns, wherein the compressive layer is under a compressive stress of at least 250 MPa, wherein the glass material is a glass ceramic comprising a silicate glassy phase and a ceramic phase, and wherein the ceramic phase comprises β-quartz.
Dependencies are inferred from the claim text.