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:
Mar. 17, 2015
Filed:
Jan. 02, 2014
Lung-han Peng, Taipei, TW;
Yao-te Wang, Taipei, TW;
Po-chun Yeh, Taichung, TW;
Po-ting Lee, New Taipei, TW;
Lung-Han Peng, Taipei, TW;
Yao-Te Wang, Taipei, TW;
Po-Chun Yeh, Taichung, TW;
Po-Ting Lee, New Taipei, TW;
Opto Tech Corporation, Hsinchu, TW;
Abstract
A white LED is provided. The white LED includes a P-type layer, a tunneling structure, an N-type layer, an N-type electrode, and a P-type electrode. The tunneling structure is disposed over the P-type layer. The tunneling structure includes a first barrier layer, an active layer and a second barrier layer. The first barrier layer includes a first metal oxide layer. The active layer includes a second metal oxide layer. The second barrier layer includes a third metal oxide layer. The N-type layer is disposed over the tunneling structure. The N-type electrode and the P-type electrode are respectively contacted with the N-type layer and the P-type layer. An energy gap of the second metal oxide layer is lower than an energy gap of the first metal oxide layer and is lower than an energy gap of the third metal oxide layer.