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. 01, 2011
Filed:
Sep. 30, 2005
Applicants:
Ken Sasakura, Tokyo, JP;
Keizo Kawaguchi, Tokyo, JP;
Hanako Ono, Tokyo, JP;
Inventors:
Assignee:
Stanley Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/06 (2006.01); H01L 31/00 (2006.01); H01L 33/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Radiation occurs when current is injected into an active layer from electrodes. A pair of clad layers is disposed sandwiching the active layer, the clad layer having a band gap wider than a band gap of the active layer. An optical absorption layer is disposed outside at least one clad layer of the pair of clad layers. The optical absorption layer has a band gap wider than the band gap of the active layer and narrower than the band gap of the clad layer. A spread of a spectrum of radiated light can be narrowed.