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:
Jan. 21, 2003
Filed:
Jul. 12, 1999
Applicant:
Inventors:
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 3/300 ;
U.S. Cl.
CPC ...
H01L 3/300 ;
Abstract
A substrate-fluorescent LED having a fluorescent-impurity doped substrate and an epitaxial emission structure including an active layer and being made on the substrate. The epitaxial emission structure emits blue or green light corresponding to the band gap of the active layer. The substrate absorbs a part of the blue or green light and makes fluorescence of a longer wavelength. Neutral color light or white light is emitted from the LED. The fluorescent substrate is n-AlGaAs(Si dope), GaP(Zn+O dope), ZnSe(Cu+I, Ag+I, Al+I dope), GaN(O.C.Va(N) dope) or so.