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:
Mar. 08, 2005
Filed:
Mar. 22, 2002
Shigetoshi Ito, Ikoma, JP;
Yukio Yamasaki, Daito, JP;
Toshiyuki Kawakami, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In connection with a nitride semiconductor laser device optimal for example for optical pickup and an optical information reproduction apparatus having superior condensation characteristics, the semiconductor laser device includes a substrate of nitride semiconductor, a lower clad layer of nitride semiconductor stacked thereon, an active layer stacked thereon, an upper clad layer of nitride semiconductor stacked thereon, and a contact layer of AlInGaN stacked thereon having a lattice constant larger than the substrate of nitride semiconductor, and the device is cleaved and thus divided to have a surface serving as a resonator mirror.