Coated thioaluminate phosphor particles
US10174242B1 · kind B1 · utility
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29References
20Claims
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Key dates
| Filing date | May 30, 2018 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | May 30, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8512
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Thioaluminate phosphor particles having a coating comprising or consisting essentially of a nitride, and methods for making such phosphor particles, are disclosed. Phosphor-converted light emitting diodes may comprise such coated phosphor particles. The nitride coatings on the thioaluminate phosphor particles provide a significantly improved barrier to water compared, to an aluminum oxide coating, and extend the operational lifetime of such a phosphor-converted light emitting diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.