The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2022
Filed:
Mar. 23, 2020
Corning Incorporated, Corning, NY (US);
Jaymin Amin, Corning, NY (US);
Xiaoju Guo, Corning, NY (US);
Pascale Oram, Hammondsport, NY (US);
Rostislav Vatchev Roussev, Painted Post, NY (US);
Ljerka Ukrainczyk, Ithaca, NY (US);
Taylor Marie Wilkinson, Painted Post, NY (US);
CORNING INCORPORATED, Corning, NY (US);
Abstract
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.