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. 30, 1978
Filed:
Apr. 28, 1977
Michael Ettenberg, Freehold, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
A reflector of optical radiation is on at least one radiation emitting facet of an electroluminescent device. The reflector includes a plurality of contiguous layers of alternating composition. The layers are of silicon and a material selected from the group consisting of aluminum oxide, magnesium fluoride and silicon dioxide. Each of the layers is approximately .lambda./4n in thickness where '.lambda.' is the free space wavelength of radiation emitted from the electroluminescent device, and 'n' is the index of refraction of the layer. Two of the alternating contiguous layers provide a reflector which is partially reflecting, while six of the layers provide a reflector substantially reflecting to optical radiation.