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:
Feb. 08, 2011
Filed:
Oct. 19, 2006
Kinuka Tanabe, Tokyo, JP;
Yoshihiko Ikenaga, Tokyo, JP;
Norihiro Iwai, Tokyo, JP;
Takeo Kageyama, Tokyo, JP;
Koji Hiraiwa, Tokyo, JP;
Hirokazu Yoshikawa, Tokyo, JP;
Kinuka Tanabe, Tokyo, JP;
Yoshihiko Ikenaga, Tokyo, JP;
Norihiro Iwai, Tokyo, JP;
Takeo Kageyama, Tokyo, JP;
Koji Hiraiwa, Tokyo, JP;
Hirokazu Yoshikawa, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A vertical-cavity surface-emitting (VCSEL) device has a layer structure including a top DBR mirror, an active layer, a current confinement oxide layer, and a bottom DBR mirror, the layer structure being configured as a mesa post. The current confinement oxide layer has a central current injection area and a peripheral current blocking area oxidized from the sidewall of the mesa post. The mesa post has a substantially square cross-sectional shape, thereby allowing an oxidation heat treatment to configure a substantially circular current injection area in the current-confinement oxide layer.