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:
Aug. 30, 2011
Filed:
May. 24, 2007
Gerald H. Negley, Durham, NC (US);
F. Neal Hunter, Durham, NC (US);
Gerald H. Negley, Durham, NC (US);
F. Neal Hunter, Durham, NC (US);
Cree, Inc., Durham, NC (US);
Abstract
There is provided a solid state light emitting device comprising at least one light emitting active layer structure and at least one structure selected from among: () a first element having at least a first region which has an index of refraction gradient, () a first element, at least a portion of which has an index of refraction which is lower than an index of refraction of a side of the active layer, () first and second elements, in which one side of the second element is positioned on a side of the active layer and the first element is positioned on the other side of the second element, and in which at least a portion of the first element has an index of refraction which is lower than the index of refraction of at least a portion of the second element. Also provided are methods of making such devices.