Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2006-03-20
2010-12-07
Koslow, C. Melissa (Department: 1793)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C252S30140R, C257S098000, C313S503000, C313S486000, C313S582000, C313S583000, C313S467000, C313S468000
Reexamination Certificate
active
07846351
ABSTRACT:
This invention provides a blue phosphor, which has higher blue brightness and larger half-value width in an emission spectrum as compared with the conventional rare earth-activated sialon phosphor and has better durability as compared with the conventional oxide phosphor. The phosphor comprises a metal element M, wherein M represents Ce, dissolved as a solid solute in a nitride or oxynitride crystal having a β-type Si3N4crystal structure, an AlN crystal structure, or an AlN polytype structure, and emits fluorescence having a peak in a wavelength region of 450 nm to 500 nm upon exposure to light from an excitation source.
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Antonelli, Terry Stout & Kraus, LLP.
Koslow C. Melissa
National Institute for Materials Science
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