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:
Oct. 17, 2006
Filed:
Jul. 02, 2004
Applicant:
Takahiko Kawahara, Yokohama, JP;
Inventor:
Takahiko Kawahara, Yokohama, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor optical devicehas an n-type semiconductor layer, an active layer, and a p-type semiconductor portionprovided in order on a principal surfaceof a substrate. The p-type semiconductor portionhas a ridge portionand a base portion, and a contact layeris formed on the ridge portion. A first portionof an insulating layerextends along a plane intersecting with the principal surfaceof the substrate, on a side faceof the ridge portionand on a side faceof the contact layer. An endof the first portionis higher than an edgeof the side faceof the contact layer