Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Toshiyuki Obata0
Date of Patent
June 28, 2011
Patent Application Number
12692098
Date Filed
January 22, 2010
Patent Primary Examiner
Patent abstract
A laser diode device with which a low voltage is realized is provided. The laser diode device includes: a substrate; a semiconductor laminated structure including a first conductive cladding layer, an active layer, and a second conductive cladding layer on one face side of the substrate and having a contact layer as the uppermost layer, in which a protrusion is formed in the contact layer and the second conductive cladding layer; and an electrode provided on the contact layer. The contact layer has a concavo-convex structure on a face on the electrode side, and the electrode is contacted with the contact layer at contact points of a top face, a side face, and a bottom face of the concavo-convex structure.
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