Corning Incorporated

Taylor Marie Wilkinson

Rostislav Vatchev Roussev

Xiaoju Guo

Ljerka Ukrainczyk

Jaymin Amin

Pascale Oram

Yuhui Jin

Vitor Marino Schneider

Wei Sun

Joshua James McCaslin

Methods of manufacturing a glass-based article includes exposing a glass-based substrate having a lithium aluminosilicate composition to an ion exchange treatment to form the glass-based article. The ion exchange treatment including a molten salt bath having a concentration of a sodium salt in a range from 8 mol % to 100 mol %. The glass-based article includes sodium having a non-zero varying concentration extending from a surface of the glass-based article to a depth of the glass-based article The glass-based article has compressive stress layer extending from the surface to a spike depth of layer from 4 micrometers to 8 micrometers. The glass-based article includes a molar ratio of potassium oxide (KO) to sodium oxide (NaO) averaged over a distance from the surface to a depth of 0.4 micrometers that is greater than or equal to 0 and less than or equal to 1.8.

Scratch resistant glass and method of making

A method of modifying a glass substrate comprises: generating surface features with peaks and valleys on a first surface of a glass substrate, the surface features providing a roughness average (Ra) within the range of 10 nm to 2000 nm; generating a region of the glass substrate that is under compressive stress, the region extending from the first surface to a depth of compression; and removing a portion of the region under compressive stress from the first surface into the depth of compression to define a new first surface still having surface features with peaks and valleys providing a roughness average (Ra) within the range of 10 nm to 2000 nm. Removing the portion of the region under compressive stress from the first surface into the depth of the compression to define a new first surface can comprise contacting the first surface with a light etchant.

Method of modifying a textured glass substrate with a region under compressive stress to increase strength of the glass substrate

Glass-based articles comprise stress profiles providing improved scratch resistance. The glass-based articles comprise: a thickness t; a lithium aluminosilicate composition; and a molar ratio of sodium oxide (NaO) to lithium oxide (LiO) that is less than or equal to 0.63 at the center of the glass-based article. The articles have a molar ratio of sodium dioxide (NaO) to lithium dioxide (LiO) in a post-spike near region that is greater than or equal to 0.9 and/or less than 1.5.

Glass-based articles comprise stress profiles providing improved scratch resistance. A glass-based article comprises a lithium aluminosilicate composition and a molar ratio of potassium oxide (KO) to sodium oxide (NaO) averaged over a distance from the surface to a depth of 0.4 micrometers that is greater than or equal to 0 and less than or equal to 1.8. The article comprises sodium having a non-zero varying concentration extending from a surface of the glass-based article to a depth of the glass-based article and a spike depth of layer that is greater than or equal to 4 micrometers and less than or equal to 8 micrometers. The article may comprise an average compressive stress of greater than or equal to 150 MPa over a depth from 15 micrometers to 40 micrometers.

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Painted Post, NY, United States of America

Taylor Marie Wilkinson