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:
Oct. 19, 2010
Filed:
May. 17, 2007
Naofumi Suzuki, Tokyo, JP;
Kimiyoshi Fukatsu, Tokyo, JP;
Naofumi Suzuki, Tokyo, JP;
Kimiyoshi Fukatsu, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
It is enabled to provide that a light emitting device have an electron blocking layer () positioned between tunnel junctions () and an active layer (). The electron blocking layer () has an energy of conduction band edge higher than that of the active layer (), and is composed of a material containing substantially no aluminum. It suppresses leakage of electrons from an n-type layer through a p-layer to an n-type layer. It is also enabled to provide that a light emitting device is capable of preventing the electron blocking layer () from being oxidized in the process of manufacturing by using a layer containing no aluminum for the electron blocking layer ().