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:
Feb. 24, 2004
Filed:
Apr. 13, 2001
Edward A. Beam, III, Plano, TX (US);
Gary A. Evans, Plano, TX (US);
Paul Saunier, Addison, TX (US);
Ming-Yih Kao, Dallas, TX (US);
David M. Fanning, Garland, TX (US);
William H. Davenport, Hillsboro, OR (US);
Andy Turudic, Hillsboro, OR (US);
Walter A. Wohlmuth, Hillsboro, OR (US);
TriQuint Semiconductor, Inc., Hillsboro, OR (US);
Abstract
A light-emitting device includes a GaAs substrate, a light-emitting structure disposed above the substrate and capable of emitting light having a wavelength of about 1.3 microns to about 1.55 microns, and a buffer layer disposed between the substrate and the light-emitting structure. The composition of the buffer layer varies through the buffer layer such that a lattice constant of the buffer layer grades from a lattice constant approximately equal to a lattice constant of the substrate to a lattice constant approximately equal to a lattice constant of the light-emitting structure. The light-emitting device exhibits improved mechanical, electrical, thermal, and optical properties compared to similar light-emitting devices grown on InP substrates.