Glass with modified surface regions on opposing sides and methods and apparatuses for forming the same via electro-thermal poling

US12371369B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Timothy Evan Dimond · Corning, US
• Christopher William Drewnowski · Corning, US
• Charles Thomas McLaren · Elmira, US
• Mardochee Reveil · Alexandria, US
• Nicholas James Smith · Port Matilda, US
• Nicholas Ryan Wheeler · Corning, US
• Thomas Michael Zajicek · Big Flats, US

Key dates

• Filing date: May 19, 2022
• Grant date: Jul 29, 2025
• Expiry date: May 19, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C3/087
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass substrate according to one or more embodiments is disclosed. The glass substrate includes an alkali-containing bulk, at least one first alkali-depleted region, and at least one second alkali-depleted region. The alkali-containing bulk has a first surface and a second surfaces with the first and second surfaces opposing one another. The at least one first alkali-depleted region extends into the alkali-containing bulk from the first surface. The at least one second alkali-depleted region extends into the alkali-containing bulk from the second surface. The first alkali-depleted region and the second alkali-depleted region are amorphous and have a substantially homogenous composition. The first alkali-depleted region in some embodiments is a first alkali-depleted surface layer that extends across the alkali-containing bulk. The first alkali-depleted region in some embodiments is plurality of first alkali-depleted regions that are spaced apart from one another.