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:
Dec. 16, 2025
Filed:
Feb. 18, 2021
Sony Group Corporation, Tokyo, JP;
Yukio Hoshina, Kumamoto, JP;
Hideki Watanabe, Kumamoto, JP;
SONY GROUP CORPORATION, Tokyo, JP;
Abstract
Provided is a laser element that includes a first semiconductor layer, a second semiconductor layer, an active layer, and an electron barrier layer. The first semiconductor layer includes a group iii nitride semiconductor having a first conductive type. The second semiconductor layer includes a group iii nitride semiconductor having a second conductive type. The electron barrier layer is between the active layer and the second semiconductor layer and includes a group iii nitride semiconductor having a composition ratio of Al larger than that of the second semiconductor layer. The electron barrier layer has a recessed and projecting shape on a surface of the electron barrier layer. The recessed and projecting shape has a height difference, between a projecting portion and a recessed portion in a direction perpendicular to a layer surface direction, that is 2 nm or more and less than 10 nm.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile