Protective layers for optical coatings
US7883776B2 · kind B2 · utility
1Cited by
40References
49Claims
0Family size
Assignee
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Key dates
| Filing date | May 29, 2007 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Dec 19, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An optical coating on a transparent substrate is provided with a temporary layer of carbon as protection during manufacturing against scratches and corrosive environments. When the optical coating and/or substrate are tempered in an atmosphere reactive to carbon, such as air, the layer of carbon is removed as a carbon-containing gas. For an optical coating with a brittle, glassy, outermost layer furthest from the substrate, additional protection is provided by a scratch propagation blocker layer between the outermost layer and the carbon protective layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.