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. 29, 1995
Filed:
Jun. 01, 1994
Ichiro Yoshida, Kanagawa, JP;
Abstract
An object of the present invention is to provide a semiconductor laser with a current block layer formed on an upper clad layer and composed of GaAs so as to securely close the rays of light in horizontal direction. The present invention is a current block type semiconductor laser having a substrate composed of GaAs where the band gap of an activation layer is smaller than that of GaAs, comprising an AlGaInP (the content of Ga may be zero) formed on the GaAs substrate and opposed main cladding layers except for a stripe-shaped current passageway region and a GaAs auxiliary cladding layer formed on the main cladding layer in the stripe-shaped current passageway region surrounded by the current block layer.