Source: http://www.google.com/patents/US8154039?dq=7,579,397
Timestamp: 2014-07-13 01:39:10
Document Index: 649699876

Matched Legal Cases: ['Application No. 10181491', 'Application No. 10181491', 'Application No. 05', 'Application No. 2007', 'Application No. 2007', 'art 2', 'Application No. 05797533', 'Application No. 2007', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 05806491', 'Application No. 05806491', 'Application No. 2007', 'Application No. 2007']

Patent US8154039 - High efficiency group III nitride LED with lenticular surface - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA light emitting diode is disclosed having a vertical orientation with an ohmic contact on portions of a top surface of the diode and a mirror layer adjacent the light emitting region of the diode. The diode includes an opening in the mirror layer beneath the geometric projection of the top ohmic contact...http://www.google.com/patents/US8154039?utm_source=gb-gplus-sharePatent US8154039 - High efficiency group III nitride LED with lenticular surfaceAdvanced Patent SearchPublication numberUS8154039 B2Publication typeGrantApplication numberUS 12/401,832Publication dateApr 10, 2012Filing dateMar 11, 2009Priority dateSep 22, 2004Also published asEP1792350A2, EP2267802A2, EP2267802A3, EP2270878A2, EP2270878A3, US8174037, US8183588, US8692267, US20060060874, US20090166659, US20090242918, US20110284875, WO2006036565A2, WO2006036565A3Publication number12401832, 401832, US 8154039 B2, US 8154039B2, US-B2-8154039, US8154039 B2, US8154039B2InventorsJohn Adam Edmond, David Beardsley Slater, Jr., Jayesh Bharathan, Matthew DonofrioOriginal AssigneeCree, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (108), Non-Patent Citations (76), Classifications (11), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetHigh efficiency group III nitride LED with lenticular surfaceUS 8154039 B2Abstract A light emitting diode is disclosed having a vertical orientation with an ohmic contact on portions of a top surface of the diode and a mirror layer adjacent the light emitting region of the diode. The diode includes an opening in the mirror layer beneath the geometric projection of the top ohmic contact through the diode that defines a non-contact area between the mirror layer and the light emitting region of the diode to encourage current flow to take place other than at the non-contact area to in turn decrease the number of light emitting recombinations beneath the ohmic contact and increase the number of light emitting recombinations in the more transparent portions of the diode.
What is claimed is: 1. In a light emitting diode having a vertical orientation with a top ohmic contact on portions of a top surface of said diode and a mirror layer adjacent the light emitting region of said diode; the improvement comprising:
This application is a divisional of Ser. No. 11/082,470 filed Mar. 17, 2005 for �High Efficiency Group III Nitride LED with Lenticular Surface.� No. 11/082,470 is a continuation-in-part of Ser. No. 10/951,042 filed Sep. 22, 2004 for �High Efficiency Group III Nitride Silicon Carbide Light Emitting Diode,� and now U.S. Pat. No. 7,259,402, the contents of which are incorporated entirely herein by reference.
This application is also related to the following copending and commonly assigned U.S. applications: Ser. No. 10/811,350 filed on Mar. 26, 2004 for, �Etching of Substrates of Light Emitting Devices,� and now U.S. Pat. No. 7,202,181; Ser. No. 60/591,353. filed on Jul. 27, 2004 for, �Ultra-Thin Ohmic Contacts for P-Type Nitride Light Emitting Devices,� and now published as No. 20060046328; and Ser. No. 60/639,705 filed Dec. 28, 2004 for, �Ultra-Thin Ohmic Contacts for P-Type Nitride Light Emitting Devices,� now published as No. 20060046328. The contents of each of these are incorporated entirely herein by reference.
In commercial embodiments of light emitting diodes (e.g., the XBRIGHT� diodes offered by the assignee herein; Cree, Inc.; Durham, N.C.) recent advances have included an inverted device design. U.S. Pat. No. 6,740,906 discusses aspects of this design as does U.S. Patent Application Publication No. 20020123164. The contents of both of these are incorporated entirely herein by reference. In this type of design, the Group III active layers are grown (typically epitaxially) on a silicon carbide substrate. Light emitting diodes of this type are then mounted with their epitaxial layers (�epilayers�) �down� rather than �up�; i.e., the silicon carbide portions form the display face of the mounted device. In this orientation the epitaxial layers are mounted to and face a circuit or �lead frame� that provides the electrical connection to the diode. The silicon carbide-up orientation increases light extraction from the device as set forth in the '906 patent and the '164 publication.
The lenticular features described and claimed herein can be formed using at least the techniques set forth in copending and commonly-assigned application Ser. No. 10/815,293 filed Apr. 1, 2004 for, �Laser Patterning of Light Emitting Devices and Patterned Light Emitting Devices,� and now U.S. Pat. No. 7,419,912, the contents of which are incorporated entirely herein by reference. Other techniques will be apparent to those of ordinary skill in this art.
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