Patent ID: 7445730
Filing Date: 2008-11-04
Classification: C09K,H01L

Abstract:
1. A phosphor, which is given as a general composition formula expressed by MmAaDbOoNn:Z, (where element M is at least one kind of element having bivalent valency, element A is at least one kind of element having tervalent valency, element D is at least one kind of element having tetravalent valency, O is oxygen, N is nitrogen, and element Z is at least one kind of element acting as an activator), satisfying 6.0≦(a+b)/m≦8.0, 0.0≦a/m≦2.0, 0≦o<n, n=2/3m+a+4/3b−2/30, 4.0≦b/m≦8.0, 0<o/m≦3.0, and having an emission spectrum with a maximum peak wavelength from 400 nm to 500 nm under an excitation of the light in a wavelength range from 350 nm to 430 nm.