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. 27, 2010
Filed:
Jul. 02, 2008
Applicants:
Masahiro Kume, Shiga, JP;
Toru Takayama, Nara, JP;
Shouichi Takasuka, Hyogo, JP;
Isao Kidoguchi, Hyogo, JP;
Inventors:
Masahiro Kume, Shiga, JP;
Toru Takayama, Nara, JP;
Shouichi Takasuka, Hyogo, JP;
Isao Kidoguchi, Hyogo, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/00 (2006.01); H01S 3/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a dual-wavelength semiconductor laser in which a first semiconductor laser element and a second semiconductor laser element are integrated onto a substrate made of a compound semiconductor, a constituent material of an etching stopper of the first semiconductor laser element is a material which allows diffusion of impurities less easily than a constituent material of an etching stopper of the second semiconductor laser element.