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:
Jan. 11, 1994
Filed:
Mar. 25, 1992
Jean-Louis Lievin, Paris, FR;
Lionel Le Gouezigou, Le Val Saint Germain, FR;
Christine Labourie, Villejuif, FR;
Pierre Doussiere, Saint Germain Les Arpajons, FR;
Alcatel N.V., Amsterdam, NL;
Abstract
In a method of manufacturing a planar buried heterojunction laser a semiconductor structure is etched to delimit a laser stripe upstanding on a confinement layer. Lateral layers surround the laser stripe to constitute the planar buried heterojunction laser. They are formed by a non-selective growth method not only at the sides of said stripe but also on top of said stripe to create a parasitic projection. These layers and the projection are subsequently covered with a contact localizing layer. The projection is then removed to form a contact window in the contact localizing layer for localizing an electrical contact on top of the laser stripe. The invention finds a particular application in the manufacture of lasers for fiber optic telecommunication systems.