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:
Aug. 05, 2014
Filed:
Sep. 02, 2011
Taichiroo Konno, Hitachi, JP;
Taichiroo Konno, Hitachi, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A light-emitting element includes a semiconductor substrate, a light emitting portion including an active layer, a reflective portion between the semiconductor substrate and the light emitting portion, and a current dispersion layer on the light emitting portion. The reflective portion includes a plurality of pair layers each including a first semiconductor layer and a second semiconductor layer. The first semiconductor layer has a thickness Tdefined by a formula (1) and the second semiconductor layer has a thickness Tdefined by a formula (2), where λrepresents a peak wavelength of the light emitted from the active layer, nrepresents a refractive index of the first semiconductor layer, nrepresents a refractive index of the second semiconductor layer, nrepresents a refractive index of a first cladding layer, and θ represents an incident angle of light from the first cladding layer to the second semiconductor layer.