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:
May. 26, 2022
Tianjin Sanan Optoelectronics Co., Ltd., Tianjin, CN;
Chihhung Hsiao, Tianjin, CN;
Kunhuang Cai, Tianjin, CN;
Duxiang Wang, Tianjin, CN;
Chia-Hung Chang, Fujian, CN;
TIANJIN SANAN OPTOELECTRONICS CO., LTD., Tianjin, CN;
Abstract
A light-emitting device includes a light-emitting laminating structure having an ohmic contact layer, a transition layer, a current-spreading layer, a first type semiconductor layer, an active layer, and a second type semiconductor layer. The current-spreading layer has aluminum, and, in the current-spreading layer, a relative content of the aluminum with respect to a composition of the current-spreading layer is fixed. The transition layer has aluminum, and, in the transition layer, a relative content of the aluminum with respect to a composition of the transition layer is less than the relative content of the aluminum in the current-spreading layer. A method for producing the light-emitting device is also disclosed.