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. 07, 2014
Filed:
Dec. 18, 2013
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Abstract
An optical semiconductor device of one embodiment includes: a first semiconductor layer of a first conductivity type; an active layer provided on the first semiconductor layer and has a ring- or disk-like shape; a second semiconductor layer of a second conductivity type that is provided on the active layer and has a ring- or disk-like shape; a first electrode provided on the first semiconductor layer; and a second electrode provided on the second semiconductor layer. The first semiconductor layer includes a first region having a ring- or disk-like shape, and a second region provided around the outer circumference of the first region and has a smaller thickness than the first region. The first electrode is provided on the second region, and a groove or holes are provided in a portion of the second region located between the first region and the first electrode.