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. 28, 2006
Filed:
Sep. 16, 2004
Pao-i Huang, Chiayi, TW;
Chuan-cheng Tu, Taipei, TW;
Jen-chau Wu, Hsinchu, TW;
Mediatek, Incorporated, Hsin-Chu, TW;
Abstract
The invention provides a semiconductor light emitting device and the method of making it. The semiconductor light emitting device, according to the invention, includes an undoped InGAAlN film, as an Ohmic layer, formed between a top-most semiconductor material layer and a transparent conductive oxide layer. Since the undoped film as a tunneling layer is very thin (≦20 angstroms), the electric field across the tunneling layer, under forward bias, will make electron tunneling from valence band to conduction band, and return to the transparent conductive layer, A reasonably low and stable forward voltage of the semiconductor light emitting device according to the invention can be achieved.