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:
Jul. 21, 1981
Filed:
Mar. 07, 1979
Yuichi Ono, Tokyo, JP;
Kazuhiro Ito, Tokyo, JP;
Mitsuhiro Mori, Kokubunji, JP;
Masaaki Aoki, Kokubunji, JP;
Kazuhiro Kurata, Hachioji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A planar-type pleochroic light emitting diode and a method of fabricating the same are disclosed, the diode allowing from a single chip a plurality of light emissions having different center wavelengths. Impurity diffusion is carried out by use of a film having a masking effect to an impurity and a different film partially non-uniform in thickness having no masking effect to the impurity to form a plurality of diffusion regions having different depths. The diode has excellent coupling with an optical fiber, can be easily fabricated and is suitable for use in optical multiplex communication.