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:
Jan. 07, 2014
Filed:
Apr. 22, 2011
Kai Cheng, Leuven, BE;
Kai Cheng, Leuven, BE;
IMEC, Leuven, BE;
Abstract
A method of manufacturing a light emitting diode is disclosed. In one aspect, the light emitting diode has a carrier, an active layer structure of III-nitride type materials, and a photonic crystal structure of III-nitride type materials. The active layer structure includes a first active layer with an n-type doped layer and a p-type doped layer and suitably a quantum well structure. The photonic crystal structure includes periodically distributed trenches or periodically distributed pillars spaced by one or more trenches. The photonic crystal structure includes an overgrowth layer within which a diameter of a trench gradually increases, and a directional photonic crystal layer in which the diameter of a trench is substantially constant. The diode may be formed in a method wherein the directional photonic crystal layer is provided on a three-dimensional pattern that exposes selected areas of the first surface of the substrate.