Bendable glass stack assemblies, articles and methods of making the same

US9898046B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Theresa Chang · Riverside, US
• Polly Wanda Chu · Riverside, US
• Patrick Joseph Cimo · Corning, US
• Adam James Ellison · Corning, US
• Timothy Michael Gross · Waverly, US
• Guangli Hu · Horseheads, US
• Nicholas James Smith · Port Matilda, US
• Butchi Reddy Vaddi · Corning, US
• Natesan Venkataraman · Corning, US

Key dates

• Filing date: Jan 4, 2017
• Grant date: Feb 20, 2018
• Expiry date: Jan 4, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/266
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A glass element having a thickness from 25 μm to 125 μm, a first primary surface, a second primary surface, and a compressive stress region extending from the first primary surface to a first depth, the region defined by a compressive stress σI of at least about 100 MPa at the first primary surface. Further, the glass element has a stress profile such that it does not fail when it is subject to 200,000 cycles of bending to a target bend radius of from 1 mm to 20 mm, by the parallel plate method. Still further, the glass element has a puncture resistance of greater than about 1.5 kgf when the first primary surface of the glass element is loaded with a tungsten carbide ball having a diameter of 1.5 mm.