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:
Mar. 17, 2009
Filed:
Mar. 13, 2006
Tohru Takiguchi, Tokyo, JP;
Tohru Takiguchi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor optical device includes an active layer, a current blocking layer on both sides of the active layer, and a cladding layer on both the active layer and the current blocking layer. The current blocking layer includes a buried layer, at least one intermediate layer of Al(Ga)InAs and a cover blocking layer. The cover blocking layer is located between the cladding layer and the Al(Ga)InAs layers and has a higher oxidation resistance than the Al(Ga)InAs layer. The current blocking layer is grown such that each Al(Ga)InAs layer is not exposed at the surface of the current blocking layer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile