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:
Apr. 22, 2013
Filed:
May. 03, 2011
Masahiro Gotoh, Tokyo, JP;
Akira Nagatomi, Tokyo, JP;
Kenji Sakane, Chiyoda-ku, JP;
Shuji Yamashita, Chiyoda-ku, JP;
Masahiro Gotoh, Tokyo, JP;
Akira Nagatomi, Tokyo, JP;
Kenji Sakane, Chiyoda-ku, JP;
Shuji Yamashita, Chiyoda-ku, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Nichia Corporation, Tokushima, JP;
Abstract
To provide a phosphor for an electron beam excitation with a small deterioration in an emission efficiency and capable of maintaining a high luminance, even when an excitation density of an electron beam for a phosphor excitation is increased. As raw materials, CaN(2N), AlN(3N), SiN(3N), and EuO(3N) are prepared, and the raw materials thus prepared are measured and mixed, so that a molar ratio of each element becomes (Ca+Eu):Al:Si=1:1:1. Then, the mixture thus obtained is maintained and fired for at 1500° C. for 3 hours, and thereafter crushed, to manufacture the phosphor having a composition formula CaSiAlN:Eu.