Phosphor production method
US7713443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2006 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Nov 26, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/181
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An object of the present invention is to provide an inorganic phosphor, particularly, an oxynitride phosphor containing alkaline earths which has a higher luminance than that of conventional sialon phosphors activated with a rare earth, and is chemically stable.By baking a raw material mixture containing at least silicon nitride powder, M element containing inorganic substance, and A element containing inorganic substance at a temperature range of 1200° C. to 2200° C. in a nitrogen atmosphere, a phosphor comprising an inorganic composition containing at least M Element, A Element, silicon, oxygen, and nitrogen (wherein M Element is one or two or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb, A Element is one or two or more elements selected from the group consisting of Mg, Ca, Sr, and Ba) and containing at least crystal having the same crystal structure as that of A2Si5N8 and A element-containing crystal is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.