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. 27, 2012
Filed:
May. 16, 2007
Method of manufacturing blue silicate phosphor, and blue silicate phosphor and light-emitting device
Seigo Shiraishi, Osaka, JP;
Kojiro Okuyama, Nara, JP;
Masahiro Sakai, Kyoto, JP;
Takehiro Zukawa, Osaka, JP;
Seigo Shiraishi, Osaka, JP;
Kojiro Okuyama, Nara, JP;
Masahiro Sakai, Kyoto, JP;
Takehiro Zukawa, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention provides a method of manufacturing a blue silicate phosphor having high luminance and a chromaticity y comparable to or lower than that of BAM:Eu. The present invention is a method of manufacturing a blue silicate phosphor represented by the general formula aAO.bEuO.(Mg,Zn)O.cSiO.dCaCl, where A is at least one selected from Sr, Ba and Ca, and 2.970≦a≦3.500, 0.006≦b≦0.030, 1.900≦c≦2.100, 0≦d≦0.05, and 0≦w≦1 are satisfied. In this manufacturing method, heat treatment is carried out in a gas atmosphere having an oxygen partial pressure of 1×10atm to 1×10atm at a temperature of 1200° C. to 1400° C.