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. 11, 1994
Filed:
Dec. 23, 1991
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 257 13 ;
Abstract
A semiconductor emitting device is provided which is capable of emitting a blue light and, which comprises a double hetero junction structure having first clad layer, an active layer and a second clad layer, successively formed on a semiconductor substrate. First and second electrodes are respectively formed on the first and second clad layers. ZnSSe thin films of low-resistivity are preferably used as the first and/or clad second layers, while a ZnSTe film can be used as the active layer.