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. 07, 2020
Filed:
Aug. 22, 2017
Nichia Corporation, Anan-shi, Tokushima, JP;
Sadakazu Wakui, Tokushima, JP;
Shoji Hosokawa, Tokushima, JP;
NICHIA CORPORATION, Anan-shi, JP;
Abstract
A nitride fluorescent material containing at least one element selected from the group consisting of Ca, Sr, Ba and Mg, at least one element selected from the group consisting of Li, Na and K, at least one element selected from the group consisting of Eu, Ce, Tb and Mn, Al and N is provided, wherein when the maximum value of absorbance in 450 cmor more and less than 900 cmis taken as 1 in an FT-IR spectrum, an integrated value Z1 of a domain surrounded by a base line A connecting absorbance values at 1,200 cmand 1,600 cmand an absorbance spectrum of 1,200 cmor more and less than 1,600 cmis 4.0 or less, and/or an integrated value Z2 of a domain surrounded by a base line B connecting absorbance values at 2,700 cmand 3,680 cmand an absorbance spectrum of 2,700 cmor more and less than 3,680 cmis 5.0 or less.