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:
Apr. 24, 2007
Filed:
Mar. 16, 2004
Jun-ya Ishizaki, Annaka, JP;
Jun-ya Ishizaki, Annaka, JP;
Shin-Etsu Handotai Co., Ltd., Tokyo, JP;
Abstract
A light emitting devicehas formed therein a light emitting layer sectionbased on a double heterostructure in which a p-type cladding layer, an active layerand an n-type cladding layer, individually composed of a MgZnO (0≦a≦1) type oxide, are stacked in this order, and uses a face on the n-type cladding layer side as a light extraction surface. The device also has, as being provided on the main surface on the light extraction surface side of the n-type cladding layer, an n-type low resistivity layercomposed of a MgZnO type oxide, and having a content of an n-type dopant larger than that in the n-type cladding layer. There is thus provided a light emitting device of MgZnO-type oxide base, excellent in the light extraction efficiency, having the light emitting layer section composed of a MgZnO-type oxide, and a high conductivity MgZnO-base compound semiconductor layer disposed on the light extraction surface side.