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:
Dec. 25, 1979
Filed:
Aug. 24, 1976
Makoto Naito, Kamakura, JP;
Akinobu Kasami, Yokohama, JP;
Tokyo Shibaura Electric Co., Ltd., Kawasaki, JP;
Abstract
A red light-emitting gallium phosphide device of high electroluminescent efficiency which comprises an n-type gallium phosphide substrate containing a donor at concentrations ranging from 1.times.10.sup.17 cm.sup.-3 to 3.times.10.sup.17 cm.sup.-3, an n-type gallium phosphide layer formed on said substrate with a donor concentration in the neighborhood of a p-n junction set at a level ranging from 2.times.10.sup.17 cm.sup.-3 to 5.5.times.10.sup.17 cm.sup.-3 and a p-type gallium phosphide layer grown on said n-type gallium phosphide layer with a net acceptor concentration and an oxygen donor concentration in the neighborhood of the p-n junction chosen to range from 1.times.10.sup.17 cm.sup.-3 to 3.times.10.sup.17 cm.sup.-3 and 0.1.times.10.sup.16 cm.sup.-3 to 8.times.10.sup.16 cm.sup.-3, respectively.