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:
Jan. 26, 2021
Filed:
Jun. 22, 2018
Corning Incorporated, Corning, NY (US);
Qiao Li, Horseheads, NY (US);
Santona Pal, Corning, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
Glass-based articles comprise: a glass-based substrate having opposing first and second surfaces defining a substrate thickness (t); a stress profile comprising: a compressive stress region extending from the first surface to a depth of compression (DOC), the DOC located at 0.04•t or deeper; and a central tension region. An alkali metal oxide is present in the central tension region. A first metal oxide whose metal has the same or smaller atomic radius as the metal of the alkali metal oxide, and a second metal oxide whose metal has a larger atomic radius than the metal of the alkali metal oxide are both present in independent concentrations that vary within at least a portion of the compressive stress region. The glass-based substrates are exposed to a multi-step ion exchange process including a first treatment of doping with ions smaller than the alkali metal oxide of the pre-fabricated glass-based substrate; and a second treatment of strengthening with larger ions to enable superior stress profile attributes. The first treatment may occur at temperatures within 300° C. of the strain point of the glass-based substrate.