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. 03, 2012
Filed:
Jan. 25, 2006
Shin-ichi Sakata, Ube, JP;
Takeshi Yamao, Ube, JP;
Tetsuo Yamada, Ube, JP;
Ube Industries, Ltd., , JP;
Abstract
A red phosphor where the crystal phase constituting the phosphor is monoclinic Eu-activated CaAlSiN. A red phosphor which is Eu-activated CaAlSiNpowder having an average particle diameter of 10 μm or less as measured in the non-pulverized state by the laser scattering particle size distribution analysis. A light-emitting device comprising a blue light-emitting element, a yellow phosphor capable of converting the blue light emitted from the blue light-emitting element into yellow light, and the above-described red phosphor capable of converting the blue light emitted from the blue light-emitting element into red light. A method for producing Eu-activated CaAlSiN, comprising firing a raw material powder comprising CaN, AlN, SiNand EuN at 1,400 to 2,000° C. in a nitrogen-containing atmosphere, the CaN, AlN and SiNgiving a composition falling in the region surrounded by a straight line connecting the following four points A to D in the composition diagram of FIG., and EuN being contained in an amount of 0.01 to 10 parts by weight as Eu per 100 parts by weight in total of CaN, AlN and SiN.