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:
Nov. 13, 2012
Filed:
Jun. 18, 2010
Akira Nagatomi, Tokyo, JP;
Shuji Yamashita, Tokyo, JP;
Tetsuya Ikuta, Tokyo, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Nichia Corporation, Tokushima, JP;
Abstract
A phosphor, which is given by a general composition formula expressed by MmAaDdOoNn:Z, (wherein element M is at least one kind of element having bivalent valency, element A is at least one kind of element having tervalent valency selected from the group consisting of Al, Ga, In, Tl, Y, Sc, P, As, Sb, and Bi, element D is Si and/or Ge, O is oxygen, N is nitrogen, and element Z is at least one kind of element selected from rare earth elements or transitional metal elements, satisfying m>0, a>0, b>0 o≧0, and n=2/3 m+a+4/3b−2/3o), where a content of the element Fe is smaller than 200 ppm.