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US Patent 7932111 Substrate removal process for high light extraction LEDs

Patent 7932111 was granted and assigned to Wolfspeed on April, 2011 by the United States Patent and Trademark Office.

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Is a
Patent
Patent
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Patent attributes

Current Assignee
Wolfspeed
Wolfspeed
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
79321110
Patent Inventor Names
John Edmond0
Date of Patent
April 26, 2011
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Patent Application Number
110647980
Date Filed
February 23, 2005
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Patent Citations Received
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US Patent 11791442 Light emitting diode package and method for fabricating same
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US Patent 11842937 Encapsulation stack for improved humidity performance and related fabrication methods
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US Patent 11876042 Omnidirectional flexible light emitting device
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US Patent 11842997 Methods for pillar connection on frontside and passive device integration on backside of die
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US Patent 12066173 Light emitting device having improved illumination and manufacturing flexibility
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US Patent 12015075 Methods of manufacturing high electron mobility transistors having a modified interface region
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US Patent 12009417 High electron mobility transistors having improved performance
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US Patent 11769768 Methods for pillar connection on frontside and passive device integration on backside of die
Patent Primary Examiner
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Matthew W Such
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Patent abstract

A method for fabricating light emitting diode (LEDs) comprises providing a plurality of LEDs on a substrate wafer, each of which has an n-type and p-type layer of Group-III nitride material formed on a SiC substrate with the n-type layer sandwiched between the substrate and p-type layer. A conductive carrier is provided having a lateral surface to hold the LEDs. The LEDs are flip-chip mounted on the lateral surface of the conductive carrier. The SiC substrate is removed from the LEDs such that the n-type layer is the top-most layer. A respective contact is deposited on the n-type layer of each of the LEDs and the carrier is separated into portions such that each of the LEDs is separated from the others, with each of the LEDs mounted to a respective portion of said carrier.

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