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:
May. 17, 2005
Filed:
Jan. 29, 2002
Hans-georg Treusch, Tucson, AZ (US);
Guido Bonati, Weimar, DE;
Hans-Georg Treusch, Tucson, AZ (US);
Guido Bonati, Weimar, DE;
Spectra-Physics, Tucson, AZ (US);
Abstract
A laser bar is soldered to a conventional microchannel copper heat sink whose coefficient of thermal expansion (CTE) is locally modified in the area where the laser bar is soldered to better match the CTE of the laser bar. A strip of ceramic material having a CTE lower than that each of the laser bar and of the copper heat sink is soldered to portions of the metallic heat sink located adjacently to the surface area on which the laser bar is located. The inclusion of the ceramic strips enables a laser bar having a nominal CTE of 6.6×10/K, to be soldered directly to a copper heat sink having a nominal CTE of 16.5×10/K without incurring thermal distortions at the interface that would limit the useful life of the laser bar.