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. 16, 1984
Filed:
Mar. 04, 1982
Applicant:
Inventor:
Bulusu V Dutt, Parsippany, NJ (US);
Assignee:
AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 17 ; 357 16 ; 357 61 ; 357 88 ;
Abstract
A single heterostructure light emitting device which provides high speed and high efficiency. The device includes adjacent n- and p- regions of a mixed-crystal III-V semiconductor such as GaAlAs. A lightly-doped wide bandgap injection layer is utilized to force recombination in the more heavily-doped adjacent region. The latter region also includes a graded bandgap which allows photon recycling for high efficiency.