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:
Apr. 08, 1980
Filed:
Jun. 12, 1975
Applicant:
Inventors:
Laurence G Walker, Dover, MA (US);
George W Pratt, Jr, Wayland, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 17 ; 357-4 ; 357-6 ; 357 23 ; 357 54 ;
Abstract
Luminescent semiconductor device having a wide-gap semiconductor material substrate (e.g., ZnS), a thin (.ltorsim.100A thick) alkali halide insulating layer (e.g., NaI, KI, LiI) in the substrate and a metal layer on the insulating layer such that the insulating layer is sandwiched between the substrate and the metal layer. The device emits light in the blue and in the green regions of the electromagnetic spectrum.