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. 24, 2026
Filed:
Nov. 22, 2022
Applicant:
Coorstek Kk, Tokyo, JP;
Inventors:
Kosuke Kimura, Kanagawa, JP;
Masaki Irie, Kanagawa, JP;
Assignee:
CoorsTek GK, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 11/08 (2006.01); C09K 11/02 (2006.01); H10H 20/851 (2025.01);
U.S. Cl.
CPC ...
C09K 11/08 (2013.01); C09K 11/02 (2013.01); H10H 20/851 (2025.01);
Abstract
The present invention relates to a ceramic phosphor plate including: a ceramic substrate having a light incident surface and a light emitting surface facing the light incident surface; and an antireflection film formed at least on the light emitting surface, in which the light emitting surface of the ceramic substrate has an uneven shape including a concave portion and a convex portion, the light emitting surface has an arithmetic mean roughness (Ra) of 0.1 μm or more and 0.7 μm or less, and a Kurtosis (Rku) obtained from a surface roughness curve of 5 or more and 10 or less.