Fluorescent substance
US7544310B2 · kind B2 · utility
17Cited by
1References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2005 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Mar 12, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8512
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A green fluorescent substance of the invention is higher in luminance of green than a conventional rare-earth activated sialon fluorescent substance and more excellent in durability than a conventional oxide fluorescent substance. The fluorescent substance is obtained by solid-dissolving Eu into a nitride or oxy-nitride crystal having a β-type Si3N4 crystal structure, and emits a fluorescent light having a peak within a range of 500 nm to 600 nm in wavelength by being irradiated with an excitation source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.