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:
Nov. 04, 2025
Filed:
Sep. 17, 2024
Nichia Corporation, Anan, JP;
NICHIA CORPORATION, Anan, JP;
Abstract
A light transmissive member, a light source device, a method of producing a light transmissive member, and a method of producing a light source device, which can suppress occurrence of damage, are provided. The light transmissive member includes a light transmissive base member having a first surface and a second surface positioned on a side opposite to the first surface, a light transmissive first film covering the first surface, a light transmissive second film covering the second surface, and a light transmissive third film provided over the second film. The first film contains hydrous alumina. The second film contains aluminum oxide having a crystallinity lower than that of α-alumina. Hardness of the third film is higher than hardness of the second film.