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:
Jun. 12, 1990
Filed:
Feb. 13, 1989
Applicant:
Inventors:
Tadashi Fukuzawa, Setagaya, JP;
Eizaburo Yamada, Tama, JP;
Kenji Hiruma, Koganei, JP;
Hiroyoshi Matsumura, Iruma, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 16 ; 357-4 ; 357-6 ; 357 17 ; 357 30 ; 372 45 ;
Abstract
A semiconductor optical device in which a hetero-structure is constructed by sandwiching a semiconductor layer including a thin film made of a semiconductor or insulator between semiconductors having a larger band gap than that of the thin film so that the electron-hole pairs generated through the thin film may recombine by the tunnel effect to emit an optical beam. The optical device is equipped with electrodes for controlling the probability of said recombination.