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. 27, 1998
Filed:
Aug. 06, 1997
Applicant:
Inventors:
Yasumasa Kashima, Tokyo, JP;
Tsutomu Munakata, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257 80 ; 257 84 ; 257 85 ; 257436 ;
Abstract
An active layer of a light-emitting diode is surrounded jointly by a pair of clad layers and a pair of block layers. The active layer includes a light-emitting portion and a light-absorbing portion which are continuously formed in one body. The light-emitting portion emits light when carriers are injected thereinto between the pair of clad layers, and the light-absorbing portion absorbs light coming from the light-emitting portion. A bandgap of the light-absorbing portion may be smaller than that of the light-emitting portion.