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. 16, 2013
Filed:
Jun. 04, 2009
Akihiro Itoh, Miyagi, JP;
Shunichi Sato, Miyagi, JP;
Akihiro Itoh, Miyagi, JP;
Shunichi Sato, Miyagi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A surface-emitting laser element for emitting light in a direction perpendicular to a substrate, including a substrate with a normal direction of a principal plane inclining toward one direction of <1 1 1> with respect to one direction of <1 0 0> and a mesa structure formed on the substrate and having a narrowed structure with an oxide produced by oxidizing a part of a layer to be oxidized selectively, containing aluminum and surrounding an electric current passage area, wherein a cross-section of mesa structure being parallel to the substrate is parallel to a substrate surface and orthogonal to both one direction of <1 0 0> and one direction of <1 1 1> and a length in a first direction passing through a center of the electric current passage area is more than a length in a second direction parallel to a substrate surface and orthogonal to the first direction.