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:
Jan. 22, 1991
Filed:
Sep. 13, 1989
Applicant:
Inventors:
Katsuji Takasu, Atsugi, JP;
Masafumi Sano, Atsugi, JP;
Hisanori Tsuda, Atsugi, JP;
Yutaka Hirai, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 17 ; 357-2 ; 357-4 ; 357 58 ; 357 59 ;
Abstract
A light emitting device has a luminescent layer having at least two layers of a non-single crystalline material containing silicon atoms, carbon atoms and fluorine atoms laminated and having a homojunction, and at least a pair of electrodes connected electrically to said luminescent layer, the non-single crystalline silicon layer having an optical band gap of 2.0 eV or higher and a localized level density at mid-gap of 5.times.10.sup.16 cm.sup.-3.ev.sup.-1 or less.