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:
Feb. 23, 1982
Filed:
Sep. 13, 1979
Donald R Scifres, Los Altos, CA (US);
Neville Connell, Cupertino, CA (US);
William Streifer, Palo Alto, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A passivation layer of perylene and its incorporation in three layer reflector structure deposited on the light emitting surface of a semiconductor electroluminescent device is disclosed. The reflector structure comprises a layer of low refractive index material, a layer of high refractive index material and a layer of low refractive index material. Preferably the index of refraction for the high refractive index layer is in excess of 3.5 and the materials for this layer may be antimony, bismuth, tellurium, selenium, germanium, arsenic, sulfur, and admixtures thereof. Admixtures may include chemically diordered crystalline or amorphous alloys of selenium, tellurium, arsenic and germanium. Examples of low index materials are Al.sub.2 O.sub.3, MgF.sub.2, SiO.sub.2, ZnO.sub.2 or perylene.