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. 09, 1980
Filed:
Jun. 13, 1978
Applicant:
Inventors:
Jean-Claude Carballes, Paris, FR;
Alain Bodere, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 71 ; 357 65 ; 357 68 ; 357 69 ; 2956 / ; 29591 ;
Abstract
The device has a laser diode with an upper face of gallium arsenide which is partly covered with titanium which forms with the gallium arsenide an ohmic contact of low resistivity. Beneath the gallium arsenide an active layer for emitting light is interposed between two layers with which it forms heterojunction. The assembly is covered with gold which forms with Ga As an ohmic contact of a much higher resistivity. The lines of current and light emission form are thus localized under the titanium.