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:
May. 03, 1988
Filed:
May. 14, 1986
Applicant:
Inventor:
Louis Menigaux, Bures Sur Yvette, FR;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
437 19 ; 372 45 ; 372 46 ; 437 22 ; 437129 ; 148D / ;
Abstract
Process is disclosed for the production of a semiconductor laser with tape geometry and laser obtained by this process. After producing a double heterostructure on a substrate, a p-dopant is implanted in these layers, so that the two layers are made insulating. This is followed by local annealing by focussing an appropriate energy source. The electrical conduction properties of the annealed part are restored and it is doped. Thus, a p-doped conductive tape is produced between two electrically insulating parts above the active zone of the laser, which increases the current confinement in said zone. The disclosed invention is used in optical telecommunications.