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:
Nov. 16, 1982
Filed:
Nov. 04, 1980
Gregory H Olsen, Plainsboro, NJ (US);
Dan Botez, Mt. Holly, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
A light emitting device comprises a substrate, a first confining layer overlying the substrate, an active layer overlying the first confining layer, a second confining layer overlying the active layer and a capping layer overlying the second confining layer. The improvement is the interposition of an absorber layer which absorbs light at the wavelength of the emission between the substrate and the first confining layer and a capping layer which absorbs light at the wavelength of the emission. The improved device exhibits an output beam which has a narrow angular intensity pattern in the plane perpendicular to the plane of the layers and to the end surfaces of the device.