Glass laminate with buried stress spikes to arrest cracks and methods of making the same

US11697617B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Douglas Clippinger Allan · Corning, US
• Vladislav Yuryevich Golyatin · Avon, FR
• Petr Gorelchenko · Riverside, US
• Jason Thomas Harris · Horseheads, US
• Jin Su Kim · Riverside, US
• Peter Joseph Lezzi · Corning, US
• Rostislav Vatchev Roussev · Corning, US
• Natesan Venkataraman · Corning, US

Key dates

• Filing date: Jul 31, 2020
• Grant date: Jul 11, 2023
• Expiry date: Jul 31, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2307/558
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A laminated glass article comprises a core layer comprising a core glass composition, and a cladding layer directly adjacent to the core layer and comprising a clad glass composition. A stress of the cladding layer increases with increasing distance from an outer surface of the cladding layer from a compressive stress to a tensile stress, transitions to a compressive stress as a step-change at an interface region between the core layer and the cladding layer, and increases with increasing distance from the interface region to a center of the core layer from the compressive stress to a tensile stress.