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. 09, 2010
Filed:
Sep. 28, 2005
Kousuke Shioi, Chiba, JP;
Kousuke Shioi, Chiba, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
An oxynitride-based fluorescent material is formed of what results from substituting Eu for part of M of a general formula MSiNO, wherein M denotes one or more elements selected from among Be, Mg, Ca, Sr and Ba. The oxynitride-based fluorescent material can be produced by a method comprising mixing an oxide of Be, Mg, Ca, Sr, Ba or Eu, or a compound of Be, Mg, Ca, Sr, Ba or Eu enabled by heating to form an oxide, silicon nitride or a compound enabled by heating to form silicon nitride, and silicon oxide or a compound enabled by heating to form silicon oxide to obtain a mixture and firing the mixture in a vacuum or a non-oxidizing atmosphere at 1200 to 1900° C.