Laser microspot welding of copper

We describe a novel procedure for highly reliable microspot welding of copper based on a calibrated on-line reflectivity measurement. This parameter is used to control the laser power slope and the weld spot diameter. Reliable welds are obtained without the need of other active control mechanisms. T...

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Bibliographic Details
Published in:Journal of laser applications 2004-08, Vol.16 (3), p.134-139
Main Authors: Amorosi, S., Sidler, Th, Salathé, R. P., Schwob, H. P., Hertzberg, J.
Format: Article
Language:English
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Summary:We describe a novel procedure for highly reliable microspot welding of copper based on a calibrated on-line reflectivity measurement. This parameter is used to control the laser power slope and the weld spot diameter. Reliable welds are obtained without the need of other active control mechanisms. The new technique allows realizing welds with a diameter close to the laser beam waist and leads to a reduction in the relative standard deviation of the molten pool diameter from 20% to about 3%.
ISSN:1042-346X
1938-1387
DOI:10.2351/1.1771145