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:
Jun. 10, 2003
Filed:
Jul. 12, 2001
Applicant:
Inventors:
Takeshi Kikawa, Kodaira, JP;
Shigeo Goto, Tokorozawa, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01C 2/144 ; H01L 2/120 ;
U.S. Cl.
CPC ...
H01C 2/144 ; H01L 2/120 ;
Abstract
A laser diode having an optical cavity which is formed on top of a semiconductor substrate and has semiconductor crystals and an oxide layer that is substantially free from arsenic oxide. The oxide layer may be formed by using the matrix of the optical cavity as a matrix or a layer formed by the hydrogenation or oxygenation of the matrix of the cavity on at least one side of the optical cavity. The laser diode has a long operational life and high reliability without facet degradation.