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:
Sep. 24, 2013
Filed:
Dec. 17, 2010
Nelson Tansu, Bethlehem, PA (US);
Helen M. Chan, Bethlehem, PA (US);
Richard P. Vinci, Easton, PA (US);
Yik-khoon EE, Mountain View, CA (US);
Jeffrey Biser, Coopersburg, PA (US);
Nelson Tansu, Bethlehem, PA (US);
Helen M. Chan, Bethlehem, PA (US);
Richard P. Vinci, Easton, PA (US);
Yik-Khoon Ee, Mountain View, CA (US);
Jeffrey Biser, Coopersburg, PA (US);
Lehigh University, Bethlehem, PA (US);
Abstract
The use of an abbreviated GaN growth mode on nano-patterned AGOG sapphire substrates, which utilizes a process of using 15 nm low temperature GaN buffer and bypassing etch-back and recovery processes during epitaxy, enables the growth of high-quality GaN template on nano-patterned AGOG sapphire. The GaN template grown on nano-patterned AGOG sapphire by employing abbreviated growth mode has two orders of magnitude lower threading dislocation density than that of conventional GaN template grown on planar sapphire. The use of abbreviated growth mode also leads to significant reduction in cost of the epitaxy. The growths and characteristics of InGaN quantum wells (QWs) light emitting diodes (LEDs) on both templates were compared. The InGaN QWs LEDs grown on the nano-patterned AGOG sapphire demonstrated at least a 24% enhancement of output power enhancement over that of LEDs grown on conventional GaN templates.