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. 19, 1998
Filed:
Jun. 19, 1996
Applicant:
Inventors:
Alain Bodere, Bruyeres Le Chatel, FR;
Elisabeth Gaumont-Goarin, Chevreuse, FR;
Assignee:
Alcatel Optronics, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437 39 ; 438 31 ; 438696 ;
Abstract
Prior to using etching to form a plateau that is to constitute a laser ridge and that is to be provided with a cover constituting a top electrode, the surface of the cover is initially protected with a dielectric mask and the flanks of the cover are then protected with a dielectric coating. The dielectric coating is initially deposited uniformly over the surface and the flanks. It is then etched by directional means so that it remains on the flanks only. The invention is particularly applicable to making an optical amplifier.