Dual stage ion exchange for chemical strengthening of glass
US8312739B2 · kind B2 · utility
161Cited by
17References
16Claims
0Family size
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Key dates
| Filing date | Jul 28, 2009 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Aug 27, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24479
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of chemically strengthening a glass. The method includes ion exchange of the glass in a first bath, followed by immersion in the second bath. The first bath is diluted with an effluent ion. The second bath has a smaller concentration of the effluent ion than the first bath. The method provides a compressive stress at the surface of the glass that is sufficient to arrest flaws introduced by contact forces at the surface of the glass while having sufficiently deep compressive depth-of-layer for high reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.