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:
Oct. 25, 2011
Filed:
Sep. 28, 2006
Ryo Sakamoto, Chiyoda-ku, JP;
Masatoshi Iwata, Chiyoda-ku, JP;
Susumu Tsujikawa, Chiyoda-ku, JP;
Yoshiyuki Kobayashi, Chiyoda-ku, JP;
Ryo Sakamoto, Chiyoda-ku, JP;
Masatoshi Iwata, Chiyoda-ku, JP;
Susumu Tsujikawa, Chiyoda-ku, JP;
Yoshiyuki Kobayashi, Chiyoda-ku, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Abstract
A light-emitting device () is provided having a current blocking layer () of buried structure, a portion of the current blocking layer () having an oxygen concentration higher than that of a light-emitting layer, the current blocking layer being of a thickness of not less than 5 nm and not more than 100 nm. It includes an etching stop layer () below the current blocking layer (), the etching stop layer being good in oxidation resistance. The light-emitting device () and its manufacturing method are provided such that the device has its current confinement effect improved and its output increased at lower forward voltage.