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. 20, 2009
Filed:
Oct. 02, 2007
Fumie Kunimasa, Tenri, JP;
Fumie Kunimasa, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
There is provided a semiconductor laser device capable of reducing stress occurring to a semiconductor laser element so that a life of the semiconductor laser device can be prolonged. In this semiconductor laser device, a solder layeris absent over a first region Rranging to a specified length Lin a perpendicular direction X from a center line Jof a light-emitting regiontoward both sides of the perpendicular direction X. That is, the first region Rover which the light-emitting regionis present serves as an incomplete bonding region between the solder layerof the semiconductor laser elementand a heat sink. Thus, stress given to the light-emitting regiondue to differences in coefficient of thermal expansion among the semiconductor laser element, the solder layerand the heat sinkduring operation is reduced.