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:
Jun. 24, 2025
Filed:
Nov. 14, 2022
Nichia Corporation, Anan, JP;
Makoto Abe, Tokushima, JP;
NICHIA CORPORATION, Anan, JP;
Abstract
A light emitting element includes a first light emitting part having a first active layer, a tunnel junction part, and a second light emitting part having a second active layer. The first active layer includes a plurality of first well layers, and a first barrier layer positioned between two adjacent first well layers among the first well layers. The second active layer includes a plurality of second well layers, and a second barrier layer positioned between two adjacent second well layers among the second well layers. The second barrier layer includes a nitride semiconductor layer that contains aluminum and gallium, and has an aluminum composition ratio higher than an aluminum composition ratio of the first barrier layer. An aluminum composition ratio peak of the second barrier layer is located on a first light emitting part side of the second barrier layer.