| US 7,524,437 B2 | ||
| Phosphor and manufacturing method of the same, and light emitting device using the phosphor | ||
| Kenji Sakane, Tokyo (Japan); and Akira Nagatomi, Tokyo (Japan) | ||
| Assigned to Dowa Electronics Materials Co., Ltd., Tokyo (Japan) | ||
| Filed on Mar. 02, 2006, as Appl. No. 11/365,830. | ||
| Claims priority of provisional application 60/658198, filed on Mar. 04, 2005. | ||
| Prior Publication US 2006/0197439 A1, Sep. 07, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C09K 11/08 (2006.01); C09K 11/55 (2006.01); C09K 11/59 (2006.01); C09K 11/64 (2006.01) | ||
| U.S. Cl. 252—301.4F [252/301.6 F; 313/503; 257/98] | 31 Claims |
| 1. A phosphor, which is given as a general composition formula expressed by MmAaBbOoNn:Z, (where element M is one or more
kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B
is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is Ce acting as an
activator.), satisfying 4.0<(a+b)/m<7.0,0.8≤a/m≤1.2, b/a>2.5, n>o, 4.0≤b/m≤6.0, 0<o/m≤3.0,n=2/3m+a+4/3b−2/3o,
wherein when the phosphor is irradiated with one or more kind of monochromatic light or continuous light having a wavelength
range from 350 nm to 500 nm as an excitation light, a peak wavelength in an emission spectrum is in the range from 500 to
600 nm.
|