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:
Dec. 17, 1991
Filed:
Aug. 15, 1990
Applicant:
Inventor:
Etsuji Omura, Itami, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 47 ; 372 46 ;
Abstract
A transverse junction stripe semiconductor laser includes a double heterostructure of a first semiconductor layer of a first conductivity type, a second semiconductor layer of the first conductivity type having a smaller energy band gap than that of the first semiconductor layer, and a third semiconductor layer of the first conductivity type having a smaller energy band gap than that of the second semiconductor layer, and an impurity region of the second conductivity type formed through part of the first, second, and third semiconductor layers, wherein the first, second, and third layers are AlGaInAs.