Tempered glass
US10968136B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2016 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Mar 16, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/091
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a tempered glass, including, on a surface thereof, a compressive stress layer having a compressive stress, and including a tensile stress layer having a tensile stress inside the compressive stress layer, wherein the tempered glass satisfies the following expression (1): DZ/DT<0.65 . . . (1) where DZ represents a zero stress depth (μm) indicating a depth from the surface to a reference position at which a stress becomes zero between the compressive stress layer and the tensile stress layer, and DT represents an alkali metal diffusion depth (μm) indicating a depth of a region layer, which has diffused therein an alkali metal ion that causes the compressive stress, from the surface, and wherein the tempered glass satisfies the following expression (2): CTM<73 . . . (2) where CTM represents a maximum tensile stress (MPa).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.