Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shin-ichi Sakata1
Tetsuo Yamada1
Date of Patent
December 5, 2006
1Patent Application Number
108927351
Date Filed
July 16, 2004
1Patent Primary Examiner
Patent abstract
To provide a Sialon-based phosphor having a high photoluminescent intensity, which can realize a high brightness LED, particularly a white LED using a blue LED as the light source, and a production method of the Sialon-based phosphor. The α-Sialon based phosphor of the present invention is represented by the formula:LixMyLnzSi12−(m+n)Al(m+n)OnN16−n (I)wherein M is at least one metal selected from Ca, Mg and Y, Ln is at least one lanthanide metal selected from Eu, Dy, Er, Tb, Yb and Ce, x+ay+bz=m (assuming that the valence of metal M is a and the valence of lanthanide metal Ln is b), 0<x≦0.8, 0<y, 0<z, 0.3≦m<4.5, and 0<n<2.25.
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