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:
Feb. 16, 2021
Filed:
Aug. 08, 2019
Nichia Corporation, Anan, JP;
Tomokazu Suzuki, Tokushima, JP;
NICHIA CORPORATION, Anan, JP;
Abstract
Provided is a method for producing a fluorescent material, including: preparing a raw material mixture including a compound containing at least one rare earth element Ln selected from the group consisting of Y, Gd, La, Lu, Sc and Sm, a compound containing at least one Group 13 element selected from Al and Ga, a compound containing Tb, a compound containing Ce and a compound containing Eu, wherein the raw material mixture contains each compound such that each element satisfies a composition represented by the following formula (I): (LnTbCeEU)(AlGa)O(I), wherein a, b, c and d satisfy 0.25≤a<1, 0.008×10≤b≤1.5×10, 0.012×10≤c≤2×10, and 0≤d≤0.85, and heat-treating the raw material mixture to obtain the fluorescent material.