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:
May. 05, 1998
Filed:
Mar. 07, 1996
Applicant:
Inventors:
Geoffrey Duggan, Oxfordshire, GB;
Nobuaki Teraguchi, Nara-ken, JP;
Judy Megan Rorison, Cheltenham, GB;
Yoshitaka Tomomura, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257 15 ; 257-9 ; 257 12 ; 257 14 ;
Abstract
An optoelectronic semiconductor device is provided in which carrier transport towards the active region thereof is enhanced by the formation of a miniband within a superlattice region of the device having a repeating pattern of first and second semiconductor regions. The minimum energy level of the miniband is equal to or greater than the energy level of a guiding region between the active region and the superlattice region.