Silicate phosphor exhibiting high light emission characteristics and moisture resistance, and light emitting device
US9117981B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Nov 22, 2011 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Nov 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8515
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A silicate phosphor having a coating layer comprising a fluorine-containing compound on its surface which is obtained by a method of heating a mixture of 100 weight parts of a silicate phosphor and 0.5-15 weight parts of ammonium fluoride at a temperature in the range of 200 to 600° C. exhibits high light emission intensity and high moisture resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.