Reinforced glass, and method for producing reinforced glass
US12246987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2019 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Feb 13, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/097
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A tempered glass has a surface and a thickness. When a compressive stress of the tempered glass is represented by a positive number and a tensile stress thereof is represented by a negative number, the compressive stress at the surface is 400 MPa or more, a stress profile of the tempered glass obtained by measuring a stress in a depth direction from the surface has inflection points at each of which a second derivative of the stress profile becomes zero between the surface and a depth equal to half of the thickness, and the compressive stress value at a first inflection point at a position closest to the surface among the inflection points is 150 MPa or less. The compressive stress at a second inflection point at a position deeper than the first inflection point is 45 MPa or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.