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. 25, 1982
Filed:
Aug. 25, 1980
Albert C Limm, Lancaster, PA (US);
James T O'Brien, Leola, PA (US);
Thomas V Colgrove, Leola, PA (US);
Paul Nyul, New Holland, PA (US);
RCA Corporation, New York, NY (US);
Abstract
An improved semiconductor injection laser diode array having reduced interaction between the elements of the array. The array comprises a substrate, an active layer and a capping layer with a separate electrical contact to the capping layer for each element of the array and a common electrical contact to the substrate. The reduced interaction is obtained by regions of higher electrical conductivity extending through the substrate towards the p-n junction from those portions of the substrate surface opposed to the contacts to the capping layer and by separate electrical contacts to each of these higher conductivity regions. The higher conductivity regions provide a lower resistivity path for current flowing through the p-n junction, thus reducing current spreading.