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. 27, 1997
Filed:
Aug. 30, 1993
Applicant:
Inventors:
Masahiro Okuda, Sagamihara, JP;
Hitoshi Oda, Sagamihara, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257 20 ; 257 21 ; 257192 ;
Abstract
A semiconductor device in which a current is controlled by light includes a semiconductor member having a source unit and a drain unit and a channel unit through which electrons may flow between the source unit and the drain unit. The channel unit has a quantum well layer having a plurality of quantum energy levels and barrier layers provided adjacent to the well layer. Upon light irradiation of the quantum well layer, electrons make transitions between the different quantum energy levels, and the current flowing between the source unit and the drain unit is controlled by varying the mobility of these transitioned electrons.