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:
Nov. 09, 2004
Filed:
Jun. 23, 2003
Mu-Jen Lai, Jungli, TW;
Chiung-Yu Chang, Hsinchu, TW;
Vetra Technology, Inc., Hsinchu, TW;
Abstract
A light-emitting device with reduced lattice mismatch. The light-emitting device comprises a substrate having a first lattice constant, a first buffer multilayer deposited on the substrate, a second buffer multilayer deposited on the first buffer multilayer, and a GaN base epitaxial layer deposited on the second buffer multilayer. The lattice constant of the first buffer multilayer ranges from the first lattice constant at the bottom of the first buffer multilayer to a second lattice constant at the top of the first buffer multilayer. The lattice constant of the second buffer multilayer ranges from the second lattice constant at the bottom of the second buffer multilayer to a third lattice constant at the top of the second buffer multilayer.