The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 19, 2013
Filed:
Sep. 01, 2008
Kousuke Shioi, Tsukuba, JP;
Naoto Hirosaki, Tsukuba, JP;
Hisayuki Miki, Chiba, JP;
Showa Denko K.K., Tokyo, JP;
National Institute For Materials Science, Ibaraki, JP;
Abstract
The invention is a phosphor which includes a phosphor material having a composition represented by a general formula: M(0)M(1)M(2)M(3)ON, wherein M(0) is one or more elements selected from Li, Na, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Gd and Lu; M(1) is one or more activators selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb; M(2) is one or more elements selected from Si, Ge, Sn, Ti, Hf and Zr; M(3) is one or more elements selected from Be, B, Al, Ga, In, Tl and Zn; O is oxygen; N is nitrogen; and an atomic ratio of M(0), M(1), M(2), M(3), O and N is adjusted to satisfy the following: x, y and z satisfy 33≦x≦51, 8≦y≦12 and 36≦z≦56; a and b satisfy 3≦a+b≦7 and 0.001≦b≦1.2; m and n satisfy 0.8·me≦m≦1.2·me and 0≦n≦7 in which me=a+b; and v satisfies v={a·v(0)+b·v(1)}/(a+b) (wherein v(0) is a valence of M(0) ion and v(1) is a valence of M(1) ion). The invention also relates to a method for producing the phosphor and a light-emitting device using the phosphor.