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. 24, 2012
Filed:
Nov. 18, 2010
Tsuguki Noma, Kyoto, JP;
Tsuguki Noma, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A semiconductor laser deviceincludes infrared and red laser elementsprovided on a substrate, where the infrared elementincludes a laminate of a first lower clad layer, a first active layerand a first upper clad layer, and the red elementincludes a laminate of a second lower clad layer, a second active layerand a second upper clad layer. The clad layerincludes a third lower clad layerformed on the substrate, an etching stop layerformed on the third lower clad layer, and a fourth lower clad layerformed on the etching stop layerat a region provided with the infrared element. The second lower clad layeris formed on the etching stop layerexcept at the region of the infrared element